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:
Mar. 11, 1980
Filed:
Oct. 27, 1978
Edward G Tajkowski, Williamsville, NY (US);
Allied Chemical Corporation, Morristown, NJ (US);
Abstract
Amino resin foams of the urea-formaldehyde or urea-melamine-formaldehyde type formed from a one-phase solution of methylene chloride solvent, propylene glycol co-solvent, catalyst and polymer precursors which may be urea and formaldehyde or urea, melamine and formaldehyde. As reaction occurs between the polymer precursors in the solution, the methylene chloride in the solution vaporizes foaming the resin. In the product foam, the propylene glycol acts as a plasticizer and the methylene chloride as the blowing agent in a closed-cell foam having superior stability and insulative properties. The product foam is useful in building insulation and for other insulative purposes.