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US 6,147,170 AGranted
UV stabilized ethylene copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorGeorge Henry Hofmann
Life of this patent
Estimating the term…
Abstract
A novel plasticizer composition is disclosed which comprises an ethylene copolymer combined with a reactive ultraviolet (UV) absorbing agent by reaction. Useful UV absorbing agents include homopolymers and copolymers of vinyl-functionalized monomer of benzotriazole, benzophenone, or benzophenolate. A process for preparing this novel plasticizer composition is also provided.
Claims10
A novel plasticizer composition comprising:
- (a) a copolymer of ethylene and carbon monoxide, and
- (b) a polymerizable ultraviolet radiation absorber selected from the group consisting of substances of the general formula I, II or III:
- ##STR5## wherein:
- i) at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of an alkyl group, an aralkyl group, an aryl group, an aralkoxy group, an allyloxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group;
- ii) at least one of R.sup.5, R.sup.6 and R.sup.7 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, an aralkyl group, an aryl group, an alkoxy group, an aralkoxy group, an allyloxy group, a hydroxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group;
- iii) at least one of R.sup.8 -R.sup.13 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, an aralkyl group, an aryl group, an alkoxy group, an aralkoxy group, an allyloxy group, a hydroxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group.
3 more elements
A method for incorporating a polymerizable ultraviolet radiation absorber into a copolymer of ethylene and carbon monoxide, said method comprising:
- a. introducing a copolymerizable, reactable UV absorber selected from the group consisting of substances of the general formula I, II or III:
- ##STR6## wherein:
- i) at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of an alkyl group, an aralkyl group, an aryl group, an aralkoxy group, an allyloxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group;
- ii) at least one of R.sup.5, R.sup.6 and R.sup.7 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, an aralkyl group, an aryl group, an alkoxy group, an aralkoxy group, an allyloxy group, a hydroxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group;
- iii) at least one of R.sup.8 -R.sup.13 is an organic group having an unsaturated double bond, and the others are each a substituent group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, an aralkyl group, an aryl group, an alkoxy group, an aralkoxy group, an allyloxy group, a hydroxy group, a halogeno group, a sulfonic acid group, an ester of a sulfonic acid group, a carboxylic acid group, an ester of a carboxylic acid group, a phosphoric acid group and an ester of a phosphoric acid group,
- into a copolymer of ethylene and carbon monoxide via free radical copolymerization, or alternatively,
- b. subjecting said reactable UV absorber component to conditions effective to chemically react said reactable UV absorber component with said previously prepared copolymer of ethylene and carbon monoxide and form a polymer material to which an effective amount of a UV absorber constituent derived from said reactable UV absorber is covalently bonded or grafted.
4 more elements
Dependencies are inferred from the claim text.