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:
Jan. 24, 1978
Filed:
May. 04, 1976
Applicant:
Inventor:
Gerd Rossmy, Haltern, DT;
Assignee:
Th. Goldschmidt AG, Essen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
2604 / ; 2604 / ; 2604 / ;
Abstract
A method for the preparation of organopolysiloxane-polyether copolymers where the polysiloxane blocks are linked to the polyether blocks through SiOC linkages is disclosed wherein a mixture of organo halogen silanes and organopolysiloxanes are equilibrated using a novel mixed catalyst of a hydrogen halide acid and a peralkylated acid amide. The process produces copolymers having improved shelf life which produce polyurethane foams having excellent stability and other advantages.