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. 21, 1992
Filed:
Aug. 15, 1991
Th. Goldschmidt AG, Essen, DE;
Abstract
A method for the preparation of flexible foams containing urethane groups and having a reduced hardness is disclosed. Polyethers, having at least two hydroxyl groups and a molecular weight of 400 to 12,000 are reacted with polyisocyanates in the presence of catalysts and water and, optionally, in the presence of emulsifiers, stabilizers, cross linking agents, blowing agents and conventional auxiliaries and additives. The method is carried out in the presence of 0.01 to 1.0 parts by weight, based on 100 parts by weight of the polyol, of the alkali salt or the alkaline earth metal salt of a hydroxycarboxylic acid. The method enables the use of chlorofluorocarbons to be omitted largely or completely as physical blowing agents.