Polyester compositions having improved resistance to radiation d

Details Polyester compositions having improved resistance to radiation d Polyester compositions having improved resistance to radiation d

1980-06-02

1982-07-06

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

525437, 525444, 525445, 528176, 528192, 528272, 528293, 528295, 528300, 528304, 528309, 528298, 528220, 528209, C08K 900, C08G 6376

Patent

active

043382479

ABSTRACT:
Disclosed are highly stable copolyesters having inherent viscosities of at least 0.4 and containing in copolymerized form from about 0.3 to about 5.0% by weight of one or more of the stabilizing moieties having the general formula ##STR1## where R and R.sub.1 are each a chemical bond or an alkylene group of 1-6 carbons; R.sub.2 is alkyl, cycloalkyl, or aryl; R.sub.3 represents 1-5 groups each independently selected from H, Cl, F, alkyl, cycloalkyl, alkoxy, aryl or aryloxy; wherein all of the above alkyl and alkylene moieties comprising or being part of the R.sub.2 or R.sub.3 groups contain from 1-8 carbons; and wherein all of the above alkyl, alkylene, aryl and cycloalkyl moieties may be substituted with up to three substituents selected from halogen, alkyl of 1-8 carbons, alkoxy of 1-8 carbons, aryl, cycloalkyl and CN.

REFERENCES:
patent: 3706701 (1972-12-01), Susi
patent: 3779993 (1973-12-01), Kibler et al.
patent: 3873505 (1975-03-01), Laakso et al.
patent: 4256860 (1981-03-01), Davis et al.
patent: 4256861 (1981-03-01), Davis et al.

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