The hottest plastic additive light stabilizer

2022-09-22
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Plastic additives - light stabilizer

light stabilizers inhibit the photodegradation reaction of polymers by shielding or absorbing ultraviolet rays, quenching excited state energy and capturing free radicals, giving products good light stability. According to its action mechanism, it can be generally divided into four categories

(1) light shielding agent: inorganic pigments, fillers, etc., of which carbon black and titanium dioxide are the largest. (2) UV absorbers: benzophenone, benzotriazole, salicylate, triazine, etc. (3) Nickel quencher. (4) Free radical trapping agents: hindered amines. Light stabilizer is the fastest growing plastic additive in the domestic and international market in the future. Light stabilizer is the plastic additive with the fastest growth in the domestic and foreign markets in the future, especially the hindered amine light stabilizer (HALS) has a remarkable role and a good market prospect. At present, the domestic production capacity of light stabilizer is 1000t/A. the demand for light stabilizer in China in 2000 was 1500t, and the demand in 2010 was estimated to be about 3000t

the research of light stabilizer in China integrates research, development, production and sales. The development began in the early 1960s. Domestic chemical enterprises have small production scale and advanced technology. The main varieties produced in China are salicylates, benzophenones and benzotriazoles. HALS is a late developed variety. With the rapid development of polyethylene industry, HALS market is excluded from the domestic waste recycling project with self-developed light stabilizer gw-540 and light stabilizer 62 plastic film. 2 it is in confrontation with imported light stabilizer 944. Domestic manufacturers should reduce costs, develop a series of products, and enhance the market. Jinan new era assay instrument Co., Ltd. is based on the principle of manufacturers' leading production technology to meet the domestic market demand

light stabilizer gw-540 has high effective group content and good light stability effect. It is widely used in agricultural aging resistant films, but its molecular weight is low. When the processing temperature is too high, the loss of additives is the largest; When used in agricultural film, it is easy to migrate to the surface of the film with antifogging agents and lose with water droplets. Light stabilizer 622 is a new generation of Polymeric Light Stabilizer in China. It eliminates the shortcomings of gw-540 and has good light stability effect. It is one of the varieties that replace gw-540 in agricultural film. Light stabilizer 944 has been successfully trial produced in China in the early 1990s, but due to the low synthesis yield of hexanediamine piperidine, it has not been industrialized for a long time. However, its application in agricultural film can achieve good results, and it will become another variety of gw-540 that will replace but still be below the 50% boom and bust line in the future

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