Polyolefin compositions of high clarity and resistance to oxidation
AssigneeBecton, Dickinson and Company
InventorsJoel L. Williams, George R. Titus
Life of this patent
Estimating the term…
Abstract
Polyolefin compositions having high clarity and resistance to oxidative degradation are obtained with new dibenzylidene sorbitol additives having a sulfur-containing substituent on at least one of the benzylidene rings. Preferred additives are thioethers.
Claims19
An antioxidizing and clarifying additive for a polyolefin comprising a dibenzylidene sorbitol thioether selected from the group consisting of compounds of the structure ##STR2## wherein R may be hydrogen, halogen, lower alkoxy, lower alkyl, lower alkylthio, lower alkylsulfoxy or phenylthio wherein the term lower with respect to alkyl or alkoxy is intended to be from 1 to 6 carbon atoms, branched or unbranched, and at least one of the substituent groups is a sulfur containing group.
An antioxidizing and clarifying additive which is dibenzylidene sorbitol-4,4'-bis(methylsulfoxide).
An antioxidizing and clarifying additive for a polyolefin comprising 4,4'-bis(methylthio)dibenzylidene sorbitol.
A composition comprising a polyolefin and a clarifying and antioxidizing amount of a dibenzylidene sorbitol thioether selected from the group consisting of compounds of the general structure ##STR3## wherein R may be hydrogen, halogen, lower alkoxy, lower alkyl, lower alkylthio, lower alkylsulfoxy or phenylthio wherein the term lower with respect to alkyl or alkoxy is intended to be from 1 to 6 carbon atoms, branched or unbranched, and at least one of the substituent groups is a sulfur containing group.
A composition comprising polypropylene and an antioxidizing and clarifying amount of dibenzylidene sorbitol-4,4'-bis(methysulfoxide).
A composition comprising polypropylene and a clarifying and antioxidizing amount of 4,4'-bis(methylthio) dibenzylidene sorbitol.
Dependencies are inferred from the claim text.