Polymeric light stabilizers for plastics

Details Polymeric light stabilizers for plastics Polymeric light stabilizers for plastics

1978-11-01

1980-11-18

Phynes, Lucille M.

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

Synthetic resins

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

260 458R, 525420, 525453, 525523, 525540, 525328, 528289, 528291, C08G 6376

Patent

active

042347076

ABSTRACT:
Blocking of the end groups of condensation and addition polymers which can be used as light stabilizers and in which the recurring structural unit contains a polyalkylpiperidine residue of the formula ##STR1## or is substituted by a polyalkylpiperidine side group of the formula ##STR2## in which R is hydrogen or alkyl having 1-5 C atoms and R' is hydrogen, alkyl having 1-12 C atoms, alkeny having 3-8 C atoms, alkynyl having 3-6 C atoms, aralkyl having 7-12 C atoms, alkanoyl having 1-8 C atoms or alkenoyl having 3-5 C atoms, is effected by adding a monofunctional compound during the preparation of the polymers, or by reacting the polymer, after it has been prepared, with a monofunctional compound. Examples of monofunctional compounds are monocarboxylic acids, monoalcohols, monoamines or monoisocyanates. The polymeric light stabilizers become more stable as a result of the blocking of the end groups.

REFERENCES:
patent: 3035025 (1962-05-01), Broadhead et al.
patent: 3910860 (1975-10-01), Tanikella
patent: 3974127 (1976-08-01), Tanikella
patent: 4001189 (1977-01-01), Tanikella et al.
patent: 4001190 (1977-01-01), Tanikella et al.
patent: 4079045 (1978-03-01), Lazarus et al.
patent: 4096123 (1978-06-01), Niinami et al.

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