Hindered amine compound having double-hindered phenol structure for light stabilizer and preparation method thereof

Abstract

The invention discloses a hindered amine compound having a double-hindered phenol structure for a light stabilizer, which is expressed by a general formula (1). The hindered amine compound having the double-hindered phenol structure simultaneously has double-hindered piperidyl and the double-hindered phenol structure, and not only increases the molecular weight of HALS, but also enhances the heat-resistant oxidizability, the compatibility and the extraction resistance of the HALS. The invention also discloses a preparation method of the hindered amine compound having the double-hindered phenol structure for the light stabilizer. In the formula, R1 is C2-C18 alkylidene, C5-C6 sub-cycloalkyl, C5-C6 sub-cycloalkyl substituted by dimethylene or C2-C18 alkylidene blocked by 1 to 3 oxygen atoms; R2 and R3 are H or C1-C4 alkyl; R5 is H, C1-C8 alkyl or benzyl; and R6 is H, O free radical, -C1, -CH2CN, C1-C8 alkyl, C1-C8 alkoxy, C1-C8 alkoxy substituted by hydroxyl, C5-C12 cycloalkyloxy, C3-C6 alkenyl or C1-C3 alkyl substituted by phenyl.

Description

technical field The invention relates to a hindered amine compound used for a light stabilizer and a preparation method thereof, in particular to a hindered amine compound containing a double hindered phenol structure used for a light stabilizer and a preparation method thereof. Background technique Light stabilizers are additives that inhibit or slow down the degradation of polymer materials due to photooxidation. Therefore, the addition of light stabilizers can effectively improve the light resistance and oxygen aging properties of polymer materials, and prolong the outdoor service life. Hindered amine light stabilizer (HALS) is a new type of high-efficiency light stabilizer with excellent performance. With the rapid development of polymer materials, especially for outdoor products, the scope of application is getting wider and wider, involving almost all polymer material application fields, especially for polymer materials such as polyolefin, polystyrene, polyurethane, ...

AI Technical Summary

Problems solved by technology

However, traditional HALS have many shortcomings in terms of compatibility, extraction resistance, stability and other properties, as well as antioxidant capacity.

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