The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1992
Filed:
Aug. 30, 1990
Applicant:
Inventors:
Hans-Joachim Kollmeier, Essen, DE;
Rolf-Dieter Langenhagen, Hattingen-Niederwenigern, DE;
Helmut Schator, Essen, DE;
Christian Weitemeyer, Essen, DE;
Assignee:
Th. Goldschmidt AG, Essen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ; C08L / ; C08G / ;
U.S. Cl.
CPC ...
521111 ; 521112 ; 521137 ; 521159 ; 521174 ; 521175 ;
Abstract
A process of preparing rigid polyurethane foams is disclosed, wherein polysiloxane polyoxyalkylene block copolymers which have at least one aminofunctional group of the general formula, ##STR1## which is linked to a silicon atom, are used in an amount of 0.2 to 5% by weight, based on the polyol or the prepolymer having isocyanate groups, to provide polyurethane foams, which otherwise contain closed cells, with at least partially open the cells.