Ortho-substituted aryl phosphite additive composition

Details Ortho-substituted aryl phosphite additive composition Ortho-substituted aryl phosphite additive composition

1981-01-19

1982-09-07

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

252400A, 252400R, 252407, 524141, 524569, C08K 509, C08K 515, C08K 552

Patent

active

043483089

ABSTRACT:
An additive composition for improving the color stability of a vinyl chloride polymer stabilized with environmentally acceptable stabilizers comprises dehydroacetic acid or its Na, K., Li, Mg, Zn, Ba, Ca, Sn, or Sr salt and an organic phosphite having the formula ##STR1## wherein R.sub.1 is a t-butyl or t-amyl group, R.sub.2 is a hydrogen atom or an alkyl group having one to five carbon atoms, R.sub.3 is a hydrogen atom or a methyl group, and each of R.sub.4 and R.sub.5 independently is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 5 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an ether-substituted group having 3 to about 50 carbon atoms and 1 to about 40 ether oxygen atoms.

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