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:
Apr. 25, 1978
Filed:
Mar. 02, 1977
Walter R Knox, Town & Country, MO (US);
James C Hill, Chesterfield, MO (US);
Lawrence J Hughes, St. Charles, MO (US);
Paul W Foerst, Florissant, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
Bitumen filled polyester foams are provided through a process which comprises forming a solution of a bitumen having a softening point of at least about 80.degree. C. and a cyclic diacid anhydride at a temperature above the softening point of a bitumen, the bitumen solution is then mixed with a monoterminal epoxide and a polyterminal epoxide in the presence of a blowing agent resulting in the initiation of an exothermic reaction. The process for producing bitumen filled polyester foams through the in situ polymerization of polyesters in a solution of bitumen and the foams produced by the process constitute the invention.