- Reaction type hindered amine light stabilizer and preparation method thereof
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The invention relates to a reaction type hindered amine light stabilizer and a preparation method of the reaction type hindered amine light stabilizer. The light stabilizer is prepared by dissolving tetramethyl-4-piperidinol and a derivative of the tetramethyl-4-piperidinol into a solvent, adding a polymerization inhibitor and alpha-beta unsaturated carboxylic ester, implementing an esterificationreaction under the action of a catalyst, washing with water, and desolventizing. According to the disclosed reaction type hindered amine light stabilizer and the preparation method of the reaction type hindered amine light stabilizer, the process is simple, the condition is mild, the purity of a produced product is high, and the yield is more than 90%. The synthesis method is simple to operate, the color of the product is light, and the light transmittance of the product is good.
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Paragraph 0031; 0032
(2019/05/08)
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- Polyalkylpiperidine derivatives
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Polyalkylpiperidinylesters and N-polyalkylpiperidinylamides of substituted malonic acids, methane tricarboxylic acids, β-keto-, α-cyano-, α-phosphono- or α-sulfonocarboxylic acids are excellent stabilizers for polymers, especially against photochemical degradation. Polymers which can be stabilized in this way very effectively are polyolefins, styrene homo- and copolymers, polyamides and polyurethanes.
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