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

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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

 

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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

 

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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

 

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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

 

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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

 

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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

 

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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

 

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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

 

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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

 

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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

 

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