UV Light Stabilizers

UV Light Stabilizer


Photo-oxidation is the result of the combined action of light and oxygen, with the action of sunlight in the presence of the air’s oxygen being the most important example. Photo-oxidation of polymers and other materials leads to degradation, discoloration and product failure unless it is prevented or significantly retarded.

Mayzo supplies products from three general classes of UV stabilizers:

  • UV Absorbers (which include benzotriazoles and benzophenones)
  • HALS (hindered amine light stabilizers)
  • Benzoates

The selection of the appropriate light stabilization system is dependent on a variety of factors including the material type, end-application, material thickness, environment for use, interactions with other components of the system, and performance and cost expectations. Increasingly a formulated solutions approach is utilized which includes consideration of the product form for ease of addition and safety/hygiene requirements.


BLS® 0113-3

Overview

BLS 0113-3 is a non-discoloring liquid light stabilization system that is highly effective in candles.  It is also suitable for use as a light stabilizer in polyurethanes and other plastics, adhesives, sealants, and coatings applications.

Chemistry

Chemical Names:                    Proprietary

CAS Number:                           Proprietary

Chemical Structure:                Proprietary

Typical Properties         

Product Form:                         Liquid

Applications

BLS 0113-3 is a highly effective light stabilizer for candles. The product is also useful in other applications such as polyurethanes and other plastics, adhesives, sealants, and coatings.

Advantages

  • Provides excellent long term UV stability in candles and other substrates
  • Compatible with a vast array of scents and dyes used in candles
  • Liquid form for ease of incorporation and processing
  • Broad spectrum absorbance of damaging UV radiation
  • Cost effective
  • Depending on the formulation, can be used at one-half the level of competitive products

Guidelines for Use

Typical recommended loading levels range between about 0.1 and 2% by weight. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed and stored in a cool, dry place. Extended storage at elevated temperatures or exposure to heat sources or direct sunlight can reduce shelf life. Keep containers sealed when not in use.

Safety 

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

This product has not been cleared by the FDA for use in food contact applications

Additional Product Details:  Please view our BLS 0113-3 PDF

BLS 119

Overview

BLS 119 is a high molecular weight hindered amine light stabilizer (HALS) useful for the stabilization of polyolefins, styrenic polymers, polyamides, thermoplastic polyurethanes (TPU), polyacetal, and powder coatings.

Chemistry

Chemical Name:                     N,N',N'',N'''-tetrakis(4,6-bis(butyl-(N-methyl-2,2,6,6-tetramethylpiperidin-4-

 yl) amino)triazin-2-yl)-4,7-diazadecane-1,10-diamine

CAS Number:                         106990-43-6

Chemical Structure:

BLS 119

Typical Properties         

Product Form:                         Solid

Melting Point:                          115-150oC

        Molecular Weight:                   2286 g/mol

Applications

BLS 119 is useful for the light stabilization of polyolefins, particularly polypropylene fibers and polyethylene-based agricultural films. It can also be used for the light stabilization of styrenic polymers (ABS, ASA), polyamides (especially fibers), thermoplastic polyurethanes (TPU), polyacetal, and powder coatings.

Advantages

  • Provides improved color yield in pigmented polypropylene fibers compared to conventional high molecular weight HALS
  • Less interacting with agricultural chemicals than conventional HALS, leading to improved
    performance in agricultural films
  • Less prone to “gas-fading” (warehouse discoloration) when used in combination with
    phenolic antioxidants than conventional HALS
  • Significantly improves the long term thermal oxidative stability of polyolefins
  • Less discoloring than conventional HALS in styrenic polymers (ABS, ASA)
  • Excellent resistance to migration and extraction
  • Low-volatility during high temperatures processing (e.g. in PP and polyamide fibers)

Guidelines for Use

In polyolefin films and fibers, recommended use levels range from 0.1 to 1.5% by weight. The exact recommendation depends on the substrate, processing conditions, and the nature of the product and end use application. BLS 119 can be used in combination with other hindered amine light stabilizers (for example BLS 1622, BLS 1770, and BLS 1880 PE), UV absorbers, benzoates (BLS 2908), as well as antioxidants and processing stabilizers such as hindered phenols and phosphites. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 119 has been cleared for use in olefin polymers under 21 CFR §178.2010. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details:  Please view our BLS 119 PDF

BLS 123

Overview

BLS 123 is a liquid hindered amine light stabilizer (HALS) that provides outstanding light stability to many industrial and automotive coatings. This product has an inherently low basicity, preventing interaction with acidic coating components such as catalysts. The liquid form also allows for outstanding compatibility with a wide variety of coating systems, including waterborne and solventbased coatings. BLS 123 is also effective for the stabilization of plastics.

Chemistry

Chemical Name:                       Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate

CAS Number:                           129757-67-1

Chemical Structure:

BLS 123

Typical Properties

 Product Form:                          Liquid

 Freezing Point:                        <-30oC

 Molecular Weight:                   685.1 g/mol

Applications

Coatings applications in which BLS 123 is recommended include automotive and industrial coatings, decorative paints, and wood stains or varnishes, including both waterborne and solventbased systems. Its low basicity makes it ideal for use in coatings that cure with an acid catalyst. Combinations with UV absorbers offer outstanding protection against cracking, gloss reduction, and chalking resulting from UV exposure and outdoor weathering. BLS 123 is also ideal for use in plastic applications, especially in cases where conventional, basic HALS can produce undesired interactions. Examples include flexible and rigid PVC compounds, automotive parts that are to be coated with acid-cured paints, and plastics containing halogenated flame-retardants. BLS 123 is also effective for the stabilization of other polymers, including polyvinyl butyral, unsaturated polyesters, and acrylics.

Advantages

  • Extends the lifetime of coatings by preventing the cracking and loss of gloss during outdoor weathering
  • Low basicity reduces interactions with acid catalyzed coating systems, acid-sensitive polymers (i.e. PVC), and halogenated flame retardants as compared to conventional HALS
  • Excellent solubility in and compatibility with a wide range of coating solvents
  • Compatible with water-based coating systems
  • Synergistic performance with other light stabilizers (UV absorbers, others)

Guidelines for Use

The recommended use levels in coatings range between 0.5% and 3.0% (based on total solids), depending on substrate, processing conditions, and performance requirements. BLS 123 can also be used in combination with UV absorbers (e.g. BLS 1130, BLS 99-2) to provide significantly enhanced performance in coatings. The liquid BLS 123 can be easily emulsified into waterborne systems.

In plastics, recommended use levels range between 0.05% and 0.5%, depending on the substrate, processing conditions, and performance requirements. BLS 123 can be used in combination with other HALS, UV absorbers, benzoates, antioxidants, and processing stabilizers. In both coating and plastic applications, the exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage 

This product may be stored up to one year in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety 

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 123 has not been cleared by the FDA for use in food contact applications.

Additional Product Details:  Please view our BLS 123 PDF

BLS 292

Overview

BLS 292 is a liquid hindered amine light stabilizer (HALS).  It provides outstanding light stability to many industrial and automotive coatings, as well as providing long-term stability to a wide variety of polymeric systems including styrenics, acrylics, polyethylene, polypropylene, and polyurethane.  As a liquid, BLS 292 blends easily and disperses completely resulting in lower loading requirements, virtually eliminating the particle dispersion problems associated with traditional powder HALS.  The liquid form also allows for outstanding compatibility with a wide variety of coating systems, including waterborne and UV curable coatings.

Chemistry

Chemical Names:                  Decanedioic acid, 1,10−bis(1,2,2,6,6−pentamethyl−4−piperidinyl)ester

                                                        Decanedioic acid, 1−methyl 10−(1,2,2,6,6−pentamethyl−4−piperidinyl) ester

CAS Numbers:                       41556-26-7

                                                82919-37-7

Chemical Structure:

BLS 292

Typical Properties         

 Product Form:                        Liquid

 Molecular Weight:                  508.8 g/mol

 369.5 g/mol

Applications

BLS 292 is recommended in coating applications including coil coatings, automotive coatings, radiation curable coatings, paints, inks and wood stains. Coating systems in which BLS 292 is ideal include one and two-component polyurethanes, thermosetting and thermoplastic acrylics (physical drying), water borne acrylics, radiation curable acrylics, alkyds, and polyesters. BLS 292 can also be used in combination with UV absorbers to provide significantly enhanced performance.

BLS 292 is also recommended in plastic applications, including styrenics, acrylics, polypropylene, polyethylene, unsaturated polyesters, polyurethane, elastomers, PVC, and PVB. The addition of antioxidants/process stabilizers is recommended for optimum performance in preventing thermooxidative degradation. Sulfur-containing phenolic antioxidants (BNX® 1035) may have a negative effect on the performance of BLS 292 and should be evaluated before use.

Advantages

  • Excellent miscibility
  • Low volatility
  • Compatible with a wide variety of systems
  • Highly effective in heavily pigmented systems
  • Lower loading requirements as a result of complete dispersion
  • Synergistic performance with other light stabilizers (coatings) and antioxidants (plastics)
  • Extends life time of coatings by minimizing defects such as loss of gloss and cracking

Guidelines for Use 

The recommended loading concentrations range between 0.5% and 2.0% depending on substrate, processing conditions, and long-term stability requirements. Exact loading must be determined by compositions of the specific polymer system. The dispersion of BLS 292 in waterborne coatings may be facilitated by dilution with a water miscible solvent. In plastics, recommended use levels range between 0.1 and 1.0%. The exact amount to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to one year in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place. BLS 292 may crystallize during storage below 0°C, but can be easily liquefied by slight warming and mixing.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 292 has not been cleared by the FDA for use in food contact applications.

Additional Product Details:  Please view our BLS 292 PDF

BLS 783

Overview

BLS 783 is a synergistic blend of the hindered amine light stabilizers BLS 1622 and BLS 1944.  The product is highly effective to improve the light stability of polyethylene (HDPE, LLDPE, LDPE) thick section parts, films, and tapes as well as polypropylene fibers and films.  BLS 783 is non-discoloring, has good compatibility with polyolefin substrates, is highly resistant to extraction, and is FDA-cleared for use in many types of polyolefins for indirect food contact applications.

Chemistry

 Chemical Names:                  BLS 1622:  Butanedioic acid, dimethyl ester, polymer with

                                                                     4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol

                                                         BLS 1944:  1,6-Hexanediamine, N,N’-bis (2,2,6,6-tetramethyl-4 piperidinyl)-,

   polymer with2,4,6-trichloro-1,3,5-triazine,

   reaction products with 2,4,4-trimethyl-2-pentanamine

 CAS Numbers:                       BLS 1622:  65447-77-0

                                                 BLS 1944:  70624-18-9

 Chemical Structure:

BLS 1622                                                          BLS 1944

BLS 1622    BLS 1944

Typical Properties

Product Form:                        Solid

Melting Range:                       BLS 1010 110 – 125oC

                                                         BLS 1944 50 – 70oC

Molecular Weight:                  BLS 1622 Mn > 2500 g/mol

        BLS 1944 Mn > 2500 g/mol

Applications

BLS 783 is a synergistic blend of polymeric hindered amine light stabilizers (HALS) developed for use in polyolefins. Recommended applications include polyethylene (HDPE, LLDPE, LDPE) moldings, films, and tapes, olefin copolymer (EVA) films, and polypropylene fibers and films.

Advantages

  • Synergy between the components provides excellent light stability to PE molded parts, films, and tapes as well as to PP fibers and films
  • Improves the thermal oxidative stability of polyolefins at moderate temperatures
  • Excellent compatibility with polyolefins, resistant to extraction and migration
  • Low volatility
  • FDA-cleared for use in many polyolefins
  • Convenient and easy to dose, low-dusting, pastille product form

Guidelines for Use

Typical recommended loading concentrations range between 0.1% and 1%. The use of BLS 783 in combination with a UV absorber such as BLS 1326 or BLS 531 is recommended in some unpigmented applications to improve retention of physical properties after weathering and also in formulations containing organic pigments to improve lightfastness and reduce color changes after weathering. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

The components of BLS 783 have been cleared for use in many polyolefins under 21 CFR §178.2010. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details:   Please view our BLS 783 PDF

BLS 1622

Overview

BLS 1622 is a high molecular weight hindered amine light stabilizer.  BLS 1622 has minimal interaction with co-additives such as pigments and other stabilizers and thus is highly effective in systems using carbon black and pigmented systems.  Secondary effects as an antioxidant are realized in the long-term heat stability of polyolefin systems.  Areas of application include polyethylene, polypropylene, unsaturated polyester, styrenics, acrylics and vinyl polymers.

Chemistry

Chemical Name:                      Dimethyl succinate polymer with

 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol

CAS Number:                           65447-77-0

Chemical Structure:

BLS 1622

Typical Properties         

 Product Form:                         Solid

 Melting Point:                          50-70oC

 Molecular Weight:                   Mn>2500

Applications

BLS 1622 is a polymeric HALS favorable for applications where low volatility and a low melting range are required. BLS 1622 is highly effective in pigmented systems and systems using carbon black. Recommended substrates include: polyethylene, polypropylene, unsaturated polyester, styrenics, EVA, polyacetals, polyurethane, acrylics and engineering plastics. Typical end use applications include adhesives, sealants, elastomers, fibers and films. BLS 1622 can be combined with other Mayzo HALS or UV absorbers to attain synergistic effects.

Advantages

  • Excellent performance in pigmented systems
  • Secondary effects of long-term heat stability
  • Low volatility
  • Compatibility with other stabilizers
  • FDA cleared for use in polyolefins and EVA

Guidelines for Use

Recommended use levels range between 0.1% and 1.5%, depending on the substrate, processing conditions, and performance requirements. BLS 1622 can be used in combination with other HALS, UV absorbers, benzoates, antioxidants, and processing stabilizers. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to one year in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations 

BLS 1622 has been cleared for use in olefin polymers and ethylene-vinyl acetate copolymers under 21 CFR §178.2010. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details: Please view our BLS 1622 PDF

BLS 1770

Overview

BLS 1770 is a low molecular weight hindered amine light stabilizer that provides excellent light stability for thick sections, but can also be used for articles with a high surface area such as films and tapes.  BLS 1770 provides effective ultraviolet light protection for applications demanding particularly high light stability.  It provides outstanding long-term stability by a radical trapping mechanism similar to that of hindered phenols.  Significant levels of stabilization are achieved at relatively low concentrations.  When compounded, BLS 1770 imparts no negative effects on a substrate’s initial color, its low dust, free-flowing form makes it exceptionally convenient to handle.

Chemistry

Chemical Name:                     Bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate

CAS Number:                          52829-07-9

Chemical Structure:

BLS 1770

Typical Properties         

Product Form:                         Solid

Molecular Weight:                  481 g/mol

Applications

BLS 1770 is a hindered amine light stabilizer offering excellent protection against ultraviolet degradation. BLS 1770 areas of application includes polypropylene, impact modified polypropylene, TPO, EPDM, polystyrene, impact polystyrene, ABS, SAN, ASA, and polyurethanes. In addition, BLS 1770 can be highly effective in polyacetals and polyamides. BLS 1770 is particularly effective in polypropylene thick sections, but it can also be used for articles with a high specific surface area such as films and tapes. BLS 1770 can be synergistically combined with other stabilizers like BLS 1328 and BLS 1710.

Advantages

  • Free-flowing, low dust
  • Excellent long-term light stability in thick cross sections
  • Excellent long-term light stability, particularly in articles with high surface areas such as films and tape
  • Non-coloring and thermally stable
  • Ease of compatibility with other stabilizers
  • FDA cleared for use in adhesives

Guidelines for Use

Recommended use levels range between 0.1% and 0.5%, depending on the substrate, processing conditions, and performance requirements. BLS 1770 can be used in combination with other HALS, UV absorbers, benzoates, antioxidants, and processing stabilizers. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to one year in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety 

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 1770 has been cleared for use in adhesives under 21 CFR §175.105. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details:  Please view our BLS 1770 PDF

BLS 1880

Overview

BLS 1880PE and BLS 1880PP are monomeric hindered amine light stabilizers (HALS) that provide excellent light stability in thick-section polypropylene and TPO applications. These products often outperform other low-molecular weight HALS (e.g. BLS 1770) even when used at reduced concentrations.  BLS 1880PE and BLS 1880PP are also non-discoloring and have excellent compatibility with polyolefin substrates.  The pellet product forms makes the products easy to handle and dose, and help to minimize worker exposure.

Chemistry

Chemical Names:                   Fatty acids, C12-21 and C18-unsaturated, 2,2,6,6-tetramethyl-4-

piperidinyl esters

                                                 BLS 1880PE      50% active in a LLDPE carrier

                                                         BLS 1880PP      50% active in a PP carrier

CAS Number:                          167078-06-0

Chemical Structure:

BLS 1880

Typical Properties         

Product Form:                         Solid

Molecular Weight:                  Mixture

Applications

BLS 1880PE and BLS 1880PP are recommended for use in polypropylene and TPO thick-section parts. The products are also suitable for use in styrenic polymers (ABS, ASA, HIPS, SAN), HDPE thick-section parts, and in TPE’s.

Advantages

  • Outstanding light stability in PP and TPO thick-sections applications
  • Non-discoloring
  • Excellent compatibility with polyolefins
  • Pellet product forms for ease of handling and dosing

Guidelines for Use 

Recommended concentrations in PP and TPO range from 0.05 to 1.0%. The use of the products in combination with a benzoate light stabilizer such as BLS 2908 is recommended for applications with the most demanding weathering requirements. In some cases the addition of a UV absorber such as BLS 531 or BLS 1326 can provide further improvements in performance. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to one year in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

These products have not been cleared by the FDA for use in food contact applications.

Additional Product Details:  Please view our BLS 1880 PDF

BLS 1944

Overview

BLS 1944 is a high molecular weight hindered amine light stabilizer.  It provides outstanding light stability to many polymers and it also provides long-term stability to polyolefins by a radical trapping mechanism similar to that of hindered phenols.  Significant levels of stabilization are achieved at relatively low concentrations. Because of its polymeric structure, BLS 1944 has a very low volatility (even at high temperatures), low extractability and low migration rate from polymeric substrates.  When compounded, BLS 1944 imparts no negative effects on a substrate’s initial color, its low dust, free-flowing form makes it exceptionally convenient to handle.

Chemistry

Chemical Name:                    Poly[[6-[(1,1,3,3,-tetramethylbutyl)amino -s-triazine-2,4-diyl]

[2,2,6,6-tetramethyl-4-piperidyl)imino]]hexamethylylene[(2,2,6,6-tetramethyl-4-piperidyl)imino]]

CAS Number:                         70624-18-9

Chemical Structure:

BLS 1944

Typical Properties         

 Product Form:                       Solid

 Melting Point:                       100-135oC

 Molecular Weight:                 Mn > 2,500

Applications

BLS 1944 is a polymeric hindered amine light stabilizer offering excellent protection against ultraviolet degradation. BLS 1944 areas of application include polyolefins (polypropylene, polyethylene), olefin copolymers such as EVA as well as blends of polypropylene with elastomers. In addition, BLS 1944 can be highly effective in polyacetals polyamides, polyurethanes, flexible and rigid PVC, as well as PVC blends and in some styrenic elastomer and adhesive specialty applications.

Advantages

  • Free-flowing low dust
  • Excellent resistance to extraction
  • Excellent long-term light stability in tick sections, specifically polyethylene applications
  • Excellent long-term light stability, particularly in thin articles like fibers and films
  • Low volatility
  • FDA clearances in polypropylene and polyethylene
  • Ease of compatibility with other stabilizers

Guidelines for Use

The recommended loading concentrations in thick sections of HDPE, LLDPE, LDPE and PP range between 0.05% and 0.6% depending on substrate, processing conditions, and long-term stability requirements. Concentration levels of BLS 1944 in films like LLDPE and LDPE range from 0.1% to 1%, and in tapes like PP and HDPE, BLS 1944 concentrations range between 0.2% and 0.8%. Concentrations levels of BLS 1944 in fibers of PP range between 0.1% and 1.0%. The presence of a UV absorber like BLS 1328 is recommended in unpigmented or slightly pigmented articles or or to improve lightfastness of certain organic pigments. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 1944 has been cleared for use in polypropylene and polyethylene under 21 CFR §178.2010. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details:   Please view our BLS 1944 PDF

BLS 2056

Overview

BLS® 2056 is a multi-functional light stabilizer system designed to provide superior performance compared to the benzotriazole absorber UV-328. BLS® 2056 can be effective in a variety of polymers including acrylics (PMMA), unsaturated polyester (UP), rigid and flexible PVC compounds, TPE’s, adhesives based on styrenic block copolymers, polyurethane (PUR) and PUR and rubber based sealants.

Chemistry

Chemical Names:                   Proprietary

CAS Numbers:                        Proprietary

Chemical Structure:               Proprietary

Typical Properties

Appearance:                           White to yellow powder

Applications

BLS® 2056 is an effective light stabilizer for a wide range of adhesive systems based on EVA, SIS, SBS and PUR. Developed as a versatile stabilizer BLS® 2056 can be used in molded items and extruded sheets. In flexible parts based on TPE or PVC BLS® 2056 can be used in industrial and building and construction applications. Due to its inherently low color contribution BLS® 2056 is ideal for use solvent based coatings.

Advantages

  • Improved regulatory acceptance compared to UV-328 benzotriazole
  • Multiple stabilization chemistries provide excellent light stability
  • Strong absorbance across the majority of the UV spectrum
  • Suitable for use in combination with optical brighteners

Guidelines for Use

Typical recommended loading levels range between about 0.1 and 2% by weight, depending upon the polymer, processing conditions, end use, and other performance requirements. The appropriate loading must be determined by testing in the specific polymer, adhesive, or sealant system. BLS® 2056 may be used in combination with other additives, including UV absorbers, hindered amine light stabilizers (HALS), benzoate light stabilizers, antioxidants (primary and/or secondary types) and optical brighteners.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed and stored in a cool, dry place. Keep containers sealed when not in use.

Safety

Please read and understand the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

This product has not been cleared by the FDA for use in food contact applications.

Additional Product Details:  Please view our BLS 2056 PDF

BLS 2908

Overview

BLS 2908 is a benzoate-type light stabilizer that functions by scavenging free radicals formed During the photodegradation of plastic materials. Combinations of this product with hindered amine light stabilizers (HALS) often provide superior performance vs. HALS used alone, especially in polyolefin substrates. BLS 2908 is non-discoloring, has good compatibility with polyolefinsubstrates, is resistant to extraction, and is FDA-cleared for use in many types of polyolefins for indirect food contact applications.

Chemistry

Chemical Name:                     Hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate

CAS Number:                          67845-93-6

Chemical Structure:

BLS 2908

Typical  Properties

Product Form:                         Solid

Melting Point:                          55-65oC

Molecular Weight:                   474.82 g/mol

Applications

BLS 2908 is a benzoate-type light stabilizer recommended for use in combination with HALS and (optionally) UV absorbers in polyolefins. Potential applications include polypropylene and TPO thick-section parts and polyethylene (HDPE, LLDPE, LDPE) moldings, films, and tapes.

Advantages

  • Provides excellent light stability to polyolefins and other plastics when used in combination with HALS and (optionally) UV absorbers
  • Improves the stability of polyolefins during processing and end use at moderate temperatures
  • Non-discoloring
  • Excellent compatibility with polyolefins, resistant to extraction and migration
  • Low volatility
  • FDA-cleared for use in polyolefins

Guidelines for Use

Recommended concentrations in polyolefins range from 0.1 to 0.5%. The use of BLS 2908 in combination with HALS such as BLS 1770 and/or BLS 1944 is recommended for thick-section polypropylene applications. These combinations generally give superior performance as compared to HALS used alone. In some cases the addition of a UV absorber such as BLS 531 or BLS 1326 can provide further improvements in performance. In polyethylene the use of BLS 2908 in combination with HALS such as BLS 783 or BLS 1944 is recommended. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific recommendations.

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.

Safety

Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

BLS 2908 has been cleared for use in olefin polymers under 21 CFR §178.2010. Please contact your Mayzo representative for complete details, including restrictions of use.

Additional Product Details: Please view our BLS 2908 PDF