Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1983-10-24
1985-06-25
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524101, 524102, 524103, 524208, 524220, 524222, 524259, 524291, 524335, 524336, 524337, 524338, 524357, 525437, C08K 534, C08K 507, C08K 510
Patent
active
045255040
ABSTRACT:
Disclosed are stabilized polyester compositions having significantly improved weatherability, said polyesters consisting of homopolyesters derived from a dicarboxylic acid component wherein at least a major portion of which is 1,4-cyclohexanedicarboxylic acid (or ester) having a trans isomer content of at least 65% and a glycol component wherein at least a major portion of which is 2,2,4,4-tetramethyl-1,3-cyclobutanediol and copolyesters thereof with modifying aliphatic glycols and/or aliphatic dicarboxylic acids, said polyesters being stabilized with the combination of at least one ultraviolet light stabilizing compound compatible with said polyester and at least one hindered amine light stabilizer having the formulae ##STR1## the groups shown as R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from various substituents.
REFERENCES:
patent: 3529982 (1970-09-01), Luethi et al.
patent: 4153597 (1979-05-01), Wheeler et al.
patent: 4278590 (1981-04-01), Dexter et al.
patent: 4363908 (1982-12-01), Joyner et al.
Morris John C.
Zannucci Joseph S.
Bailey Gary C.
Eastman Kodak Company
Kight John
Morgan Kriellion
Reece III Daniel B.
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