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Polymer stabilizers (British English: polymer stabilisers) are chemical additives which may be added to polymeric materials to inhibit or retard their degradation. Mainly they protect plastic and rubber products against heat, oxidation, and UV light.
Hindered amine light stabilizers (HALS) are chemical compounds containing an amine functional group that are used as stabilizers in plastics and polymers. [1] These compounds are typically derivatives of tetramethylpiperidine and are primarily used to protect the polymers from the effects of photo-oxidation; as opposed to other forms of polymer degradation such as ozonolysis.
UV-328 is a light stabilizer for a variety of plastics and other organic substrates. Its use is recommended for the stabilization of styrene homopolymers and copolymers, acrylic polymers, unsaturated polyesters, polyvinyl chloride, polyolefins, polyurethanes, polyacetals, polyvinyl butyral, elastomers and adhesives. [5]
UV stabilizers, such as benzophenones, work by absorbing the UV radiation and preventing the formation of free radicals. Depending upon substitution, the UV absorption spectrum is changed to match the application. Concentrations normally range from 0.05% to 2%, with some applications up to 5%. Frequently, glass can be a better alternative to ...
Stabilizing additives for plastics are produced in different forms. The trend is towards fluid systems, pellets, and increased use of masterbatches. There are monofunctional, bifunctional, and polyfunctional stabilizers. Some kinds of stabilizers are: [3] [4] antioxidants these prevent autoxidation of materials and come in 3 primary forms.
Oxybenzone is used in plastics as an ultraviolet light absorber and stabilizer. [13] It is used, along with other benzophenones, in sunscreens, hair sprays, and cosmetics because they help prevent potential damage from sunlight exposure. It is also found, as a stabilizer in concentrations up to 1%, in nail polishes. [13]
Chemtura Announces Agreement To Sell Antioxidant and UV Stabilizers Business For $200 Million to SK Capital Partners PHILADELPHIA--(BUSINESS WIRE)-- Chemtura Corporation (NYSE/EuroNext Paris: CHMT ...
4,4'-Dihydroxybenzophenone - used as a UV stabilizer in cosmetics and plastics; Dinitrobisphenol A - a proposed metabolite of BPA, which may show increased endocrine disrupting character; HPTE - a metabolite of the synthetic insecticide methoxychlor; Others. 2,2,4,4-Tetramethyl-1,3-cyclobutanediol - next generation BPA replacement
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