Polyolefin compositions

摘要

Polyolefines having improved textile properties are prepared by mixing a polyolefine with a modified polyester in a sufficient amount to improve the textile properties of the polyolefine, said polyester being formed by the reaction of at least one dicarboxylic acid or diester thereof with at least one glycol containing from 2 to 12 carbon atoms and being modified by a compound selected from the group consisting of (A) aliphatic dicarboxylic acids containing from 16 to 32 carbon atoms and the alkyl diesters thereof, (B) heterocyclic glycols e.g. compounds containing one or more 5 or 6 membered oxygen and/or nitrogen containing rings, (C) 0.05 mol. per cent. to 1.0 mol. per cent., based on the total weight of said dicarboxylic acid or ester in the reaction medium, of a chain-terminator selected from the group consisting of polyalkylvinylethers having one terminal hydroxyl group wherein the alkyl group contains 1 to 4 carbon atoms and compounds having the formula: R-O-[(CH2)mO]x(CH2)n-OH where R is an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 10 carbon atoms, m and n are integers from 2 to 22 and x is an integer from 1 to 100 or greater, and (D) 0.05 mol. per cent. to 4 mol. per cent. of said chain-terminator of (C) further modified by 0.05 mol. per cent. to 2.4 mol. per cent., based on the total weight of said dicarboxylic acid or diester thereof in the reaction medium, of a chain-branching agent selected from compounds having the formula R-(OH)n where R is a saturated aliphatic hydrocarbon radical containing from 3 to 6 carbon atoms and n is an integer from 3 to 6, compounds having the formula R-(CH2OH)3 where R is as above, compounds having the formula: where n is an integer from 1 to 6 and compounds having the formula: where n is an integer from 3 to 5 and R is an alkyl radical of up to 3 carbon atoms. Lists of polyester components and modifiers are given. In the examples polypropylene is mixed with (a) polyethylene terephthalate modified with methoxypolyethylene glycol, (b) a modified copolyester derived from dimethyl terephthalate and ethylene glycol and isosorbide, (c) polyethylene terephthalate modified with pentaerythritol and methoxypolyethylene glycol. In the last case the per cent. dye up-take is measured.