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. 05, 1998
Filed:
May. 19, 1987
Applicant:
Inventors:
Jerald C Hinshaw, Logan, UT (US);
R Scott Hamilton, Bear River City, UT (US);
Assignee:
Thiokol Corporation, Ogden, UT (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525403 ; 525408 ; 525409 ; 525410 ; 525411 ; 525413 ; 525415 ; 528 65 ; 528 66 ; 552 12 ; 149 194 ;
Abstract
Difunctional, hydroxyl-terminated polymers in which the terminal hydroxyl group is non-primary or hindered are end-capped to provide unhindered, primary, terminal hydroxyl groups which promote an improved cure and improved mechanical properties of the cured elastomer. End-capping chemicals have an hydroxyl-reactive group at one end and a group at the other end which is removable to provide a primary, unhindered hydroxyl group. Short-chain, hydroxyl-terminated polymers are chain-extended with a diisocyanate.