Stabilized copolyester material

Details Stabilized copolyester material Stabilized copolyester material

1980-06-02

1982-07-20

Nielsen, Earl A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528192, 528208, 528292, 528304, C08G 6360, C08G 6354, C08G 6368

Patent

active

043407188

ABSTRACT:
Disclosed are novel copolyester materials having improved weatherability and useful, for example, as films, fibers, sheeting and the like in outdoor applications where long and daily exposure to actinic radiation is encountered. These copolyesters comprise, for example, polyethylene terephthalate containing a total of from about 0.3 to about 5.0%, preferably from about 0.6 to about 2.0% by weight of one or more moieties having the formula ##STR1## where R.sub.1 is cyano, alkylcarbonyl, cycloalkylcarbonyl or arylcarbonyl; R.sub.2 and R.sub.3 are, for example, alkyl, cycloalkyl, or aryl which may be substituted with a large variety of groups; and --X-- is ortho, meta, or para to the -ylene linkage and is selected from groups of the formulae ##STR2## wherein R is alkylene of 1-10 carbons, aryl, or cycloalkyl, each of which may be substituted.

REFERENCES:
patent: 3706701 (1972-12-01), Susi
patent: 4230817 (1980-10-01), Charbonneau
patent: 4260719 (1981-04-01), Ching
patent: 4260732 (1981-04-01), Ching

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