Oligoesters containing polyalkylpiperidine groups

Details Oligoesters containing polyalkylpiperidine groups Oligoesters containing polyalkylpiperidine groups

1985-04-26

1986-09-02

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524102, 524103, 544121, 544129, 544364, 546187, 546188, 546189, 546190, 546191, C08K 534

Patent

active

046096981

ABSTRACT:
Oligomeric esters of the formula I or II ##STR1## in which n has a value from 1 to 3, R.sup.1 and R.sup.2 are divalent organic radicals, at least one of which contains a polyalkylpiperidine radical of the formula III ##STR2## in which R is hydrogen or C.sub.1 -C.sub.4 -alkyl and E and E' are end groups, are prepared by polycondensing a dicarboxylic acid ester with a diol, one of the two components being used in a molar excess of 33 to 100%. The end groups of these oligoesters can be modified by reaction with a monofunctional component. If two different dicarboxylic acid esters or diols are used, the corresponding co-oligoesters are obtained. All these oligoesters are valuable light stabilisers for light-sensitive organic material, especially for polymer.

REFERENCES:
patent: 4210576 (1980-07-01), Battista et al.
patent: 4233412 (1980-11-01), Rody et al.
patent: 4234707 (1980-11-01), Rody et al.
patent: 4237297 (1980-12-01), Rody et al.
patent: 4314933 (1982-02-01), Berner
patent: 4348524 (1982-09-01), Karrer et al.

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