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:
Nov. 13, 1990
Filed:
Jun. 22, 1988
Applicant:
Inventors:
Assignee:
Enichem Synthesis, SpA, Palermo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528370 ; 528371 ;
Abstract
A liquid composition polymerizable by the free-radical polymerization route, with a low shrinkage, to yield organic glasses endowed with high thermal stability, is constituted by the product of transesterification of diallyl-carbonate (A) with a mixture of diol (B) and of a polyol (C) containing from 3 to 6 hydroxy groups in the molecule, or a mixture of a diol (B) with a cycloaliphatic diol (C'), by operating with a molar ratio of A/(B+C) or A/(B+C') equal to, or larger than, 3/1, and with an amount of (C) in the (B+C) mixture equal to, or smaller than, 70% by weight, or with an amount of (C') in the (B+C') mixture equal to, or smaller than, 90% by weight.