Patent · US Expired

Particulate expandable styrene polymers having short minimum molding times

US4189515A · kind A · utility

1Cited by

8References

5Claims

0Family size

Assignee

BASF SE

Inventors

Harro Voss · Ludwigshafen, DE
Rolf Moeller · Ludwigshafen, DE
Rupert Schick · Schifferstadt, DE
Erhard Stahnecker · Heidelberg, DE

Key dates

Filing date	Apr 28, 1975
Grant date	Feb 19, 1980
Priority date	—
Expiry date	Apr 28, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31587
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Particulate expandable styrene polymers having short minimum molding times which are coated with from 0.005 to 0.5% by weight, based on the expandable styrene polymer, of a mono- and/or poly-urethane melting below 150.degree. C. and obtained by reaction of PA0 I (a) aliphatic, cycloaliphatic, aliphatic-cycloaliphatic, araliphatic and aromatic mono- and/or poly-isocyanates with PA1 (b) linear or branched monoalcohols of from 2 to 24 carbon atoms which may or may not be olefinically unsaturated and/or halogenated, or mixtures of such monoalcohols and PA1 (c) optionally dihydric to tetrahydric alcohols, PA0 the ratio of NCO groups to the total number of hydroxyl groups being from 0.25 to approximately 1:1 and the molar ratio of dihydric to tetrahydric alcohols (if used) to polyisocyanates being not more than 0.4:1; or reaction of PA0 II (a) linear or branched aliphatic, cycloaliphatic, aliphatic-cycloaliphatic, araliphatic or aromatic chlorocarboxylates of from 2 to 24 carbon atoms in the alcohol radical, which may or may not be olefinically unsaturated and/or halogenated, PA1 with PA1 (b) aliphatic, cycloaliphatic, aliphatic-cycloaliphatic, araliphatic and aromatic mono- and/or poly-…

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.