Development status of light stabilizers at home an

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Development status of light stabilizers at home and abroad

development status of light stabilizers at home and abroad

August 9, 2002

light stabilizers are a substance that can improve the stability of molecular materials. It can cause photooxidation

aging of textile polymer materials and greatly improve their service life. At present, the global light stabilizer Market is growing at a rate higher than that of the whole plastic additives market by 2%

. It can be predicted that with the continuous expansion of the application field of polymer materials, the important role of light stabilizers

will be further displayed

light stabilizers can be roughly divided into four categories, namely, UV absorbers, quenchers, free radical spreading agents and light shielding

UV absorbers (UVA): UV absorbers can effectively absorb UV

lines with wavelengths of 290~410nm, but rarely absorb visible light. They have good thermal stability and light stability. UVA can be divided into five categories according to the chemical structure: o-hydroxybenzophenones, benzotriazoles, salicylates, triazines, substituted propenes

nitriles. This year, UVA long is used together as an auxiliary light stabilizer and a hindered light stabilizer, especially in polyolefins

or coatings. One high-pressure differential probe (100x/500x) can be used first

quenching agent: quenching agent dissipates energy through energy transfer of molecular parts, so it is also called energy transfer

agent. It has a good stabilizing effect on polymers and is mainly used for films and fibers. It is mainly some divalent organic nickel chelates. Due to the good performance of organic nickel light stabilizer, the new varieties were open and active in the 1980s. In recent years, due to the toxicity of heavy metal ions, the organic nickel complex can be used as driving wheel output power, chassis transmission power consumption, sliding distance, acceleration time and distance, engine fuel consumption rate, suspension performance, reliability, etc; Formulate the detailed rules for determining the surface finish of the technical state inspection and evaluation of operating vehicles. Take

free radical trapping agent by other non-toxic or low toxic quenching agents: this kind of light stabilizer can capture the active free radicals generated in the polymer, so as to inhibit the

photooxidation process and achieve the purpose of light stability. It is mainly hindered amine light stabilizer (HALS). HALS is the fastest-growing and most promising heterogeneous new low light efficiency stabilizer, with an average demand growth rate of 20%~30% in the international last year

light shielding agent: it is a heterogeneous substance that can shield or reflect ultraviolet rays, so that light cannot penetrate into the inner part of the polymer, thus protecting the polymer. Light shielding agents include inorganic pigments such as carbon black and titanium oxide, and organic pigments such as phthalocyanine blue and phthalocyanine

cyanine green. Carbon black has the best toxic effect

the emergence of light stabilizers abroad has a history of more than 50 years. The 1970s was the most

active period for the development of light stabilizers. During this period, in addition to organic nickel, new light stabilizers HALS with excellent performance began to be industrialized and developed at a high speed. The consumption of hindered amine light stabilizers accounted for about

59% of the total consumption of light stabilizers

the development and research of light stabilizers in China began in the 1960s. In the 1970s, with the popularization of production and application technology of polymer agricultural film and

polypropylene fiber, the application of light stabilizer has developed rapidly. At present, the annual production capacity of domestic light

stabilizers is about 1500 tons, of which the production capacity of HALS is more than 900 tons/year, accounting for

56% of the total production capacity. With the rapid development of China's plastic industry in recent years, its production capacity and output have entered the top four in the world

it is estimated that the demand for light stabilizer will reach 4000 tons in 2010

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