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:
Dec. 03, 1991
Filed:
Jul. 13, 1990
Applicant:
Inventor:
John W Bulluck, Richmond, VA (US);
Assignee:
E. R. Carpenter Company, Inc., Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524871 ; 528 48 ; 528 76 ; 152310 ;
Abstract
A method for making a polyurethane elastomer tire fill composition wherein a mixture of a) a low functionality (2.0-2.3) 4,4'-diphenylmethane diisocyanate, such as a carboiimide-modified (2.0 functionality) 4,4'-diphenylmethane diisocyanate and b) a nonreactive diluent, such as an oil extender, is mixed with a polyol, such as polypropylene oxide triol. The reaction mixture is inserted into a tire casing under pressure and cured therein to form an essentially void-free tire filler. The tire fill composition maintains pressure within the tire during use and has excellent physical and thermal properties. No prepolymer step is necessary in the method.