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:
May. 04, 1982
Filed:
Sep. 22, 1980
Richard C Baron, Tewksbury, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
Synthetic polymers and a process for their preparation by a polyisocyanate polyaddition reaction are described. Synthetic polymers are provided by the reaction of a polyisocyanate with substantially an equivalent amount of an oligomeric para-, meta- or di-meta-aminobenzoic acid ester or amide having the formula ##STR1## wherein n is an integer of from 2 to 4; each x is one or two; each benzoyl nucleus is para-, meta- or di-meta- amino-substituted; each Z is ##STR2## and G is an n-valent radical which may be obtained by the removal of hydroxyl or amino groups from an n-valent oligomeric polyol or polyamine having a molecular weight of from about 400 to about 6,000. Useful synthetic polymeric products can be simply and effectively provided by reaction of the polyisocyanate and the oligomeric aminobenzoic acid ester or amide reactants without the requirement of additional curative or chain-extending agents.