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.
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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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:
Typical Properties
Product Form: Solid
Melting Point: 115-150oC
Molecular Weight: 2286 g/mol
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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:
Typical Properties
Product Form: Liquid
Freezing Point: <-30oC
Molecular Weight: 685.1 g/mol
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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:
Typical Properties
Product Form: Liquid
Molecular Weight: 508.8 g/mol
369.5 g/mol
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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
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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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:
Typical Properties
Product Form: Solid
Melting Point: 50-70oC
Molecular Weight: Mn>2500
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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:
Typical Properties
Product Form: Solid
Molecular Weight: 481 g/mol
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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:
Typical Properties
Product Form: Solid
Molecular Weight: Mixture
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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:
Typical Properties
Product Form: Solid
Melting Point: 100-135oC
Molecular Weight: Mn > 2,500
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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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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:
Typical Properties
Product Form: Solid
Melting Point: 55-65oC
Molecular Weight: 474.82 g/mol
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