Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-03-19
1991-10-22
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 91, 524222, 524239, 524321, 524359, 524596, 524494, C08K 53492
Patent
active
050596446
ABSTRACT:
Polyacetal compositions containing 0.05 to 5 weight percent of an oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom in the piperazinone ring of the stabilizer is alkylated with a metyl, ethyl, or propyl group, said compositions being relatively stable upon exposure to UV light. A polyacetal composition containing a specific oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom is not alkylated is shown to be relatively stable upon exposure to UV light. Both compositions possess stability during melt processing and do not significantly lose physical properties upon exposure to heat and light.
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E. I. Du Pont de Nemours and Company
Morgan Kriellion S.
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