Polyolefin plastic compositions comprising meta- or papa-derivatives (choro- or bromo-) of di-benzyuidene sorbitol
AssigneeMilliken Research Corporation
InventorRobert L. Mahaffey, Jr.
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Abstract
A polyolefin plastic composition having improved transparency is provided which comprises a polymer selected from aliphatic polyolefins and copolymers containing at least one aliphatic olefin and one or more ethylenically unsaturated aliphatic comonomers, and a di-acetal of sorbitol in an amount sufficient to improve transparency; said di-acetal of sorbitol having the structure: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from hydrogen, lower alkyl, hydroxy, methoxy, mono- and di-alkylamino, nitro and halogen, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is chlorine or bromine.
Claims9
A polyolefin plastic composition having improved transparency, which comprises a polymer selected from aliphatic polyolefins and copolymers containing at least one aliphatic olefin and one or more ethylenically unsaturated aliphatic comonomers and at least one di-acetal of sorbitol;
- said di-acetal of sorbitol having the structure:
- ##STR3## wherein R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from hydrogen, lower alkyl, hydroxy, methoxy, mono- and di-alkylamino, amino, nitro and halogen, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is chlorine or bromine.
A polyolefin plastic composition having improved transparency, which comprises at least 1 homopolymer of an aliphatic monoolefin or a copolymer containing an aliphatic monoolefin, said monoolefin containing from 2 to about 6 carbon atoms having an average molecular weight of from about 10,000 to about 500,000 and one or more ethylenically unsaturated aliphatic comonomers, said copolymer having been made by polymerizing said monoolefin with said comonomer;
- and at least on di-acetal of sorbitol selected from di-p-chlorobenzylidene sorbitol;
- di-m-chlorobenzylidene sorbitol;
- O-benzylidene-O-p-chlorobenzylidene sorbitol;
- di-m-bromobenzylidene sorbitol;
- and bis(3,4-dichlorobenzylidene) sorbitol;
- the proportion of the di-acetal being from about 0.01 to about 2 percent by weight based upon the total weight of the composition.
Dependencies are inferred from the claim text.