VERWENDUNG VON CARBONSAEUREESTERN ALS KRISTALLISATIONSBESCHLEUNIGER IN POLYPHENYLENSULFIDMASSEN.

摘要

Highly crystalline, rapidly crystallising compsns. (I) comprise a) 70-99.5 wt. % polypheylene sulphide of melt viscosity at least 5 Pa-s (306 deg. C, shearingforce 1000 Pa) b) 0.5-30 wt. %, on a) + b), monomeric carboxylate ester. Prepn. of (I) by adding b) to melt of a) and homogenising in the melt is claimed. Injection moulding of (I) is claimed wherein mixt. of component a) and a sulphonic acid ester component b) is cast in a mould having temp. not more than 120 deg. C, amt. of component b) being such that injection moulded (I) has at least 70% of crystallinity achieved on injection moulding unmodified component a) with tool temp. at least 130 deg. C. Component a) comprises esp. 93-97 wt. % and has melt viscosity 50-1200 Pa-s. Component b) comprises esp. 3-7 wt. %. Component b) has formula ((R2.O.CO)y.R1.COO)n-R2-()COR)m or R2OCOOR2; R1 = residue of linear or branched 1-25C aliphatic or cycloaliphatic, 10 (sic) -24C aromatic , or 7-24C araliphatic carboxylic acid; R2 = residue of a 1-20C linear or branched aliphatic, cycloaliphatic, or aromatic alcohol; m = 0-4; n = 1 when m = 0 and n = 1 when m = 1-4; and y = 1-3.