Polymeric light stabilizers for plastics

Details Polymeric light stabilizers for plastics Polymeric light stabilizers for plastics

1980-08-05

1981-11-10

Welsh, Maurice J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

260 458N, 525113, 525423, 525430, 525453, 525459, 528118, 528397, 528406, 528407, C08G 7302

Patent

active

042999260

ABSTRACT:
Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivatives of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

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