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:
Jun. 01, 1982
Filed:
Mar. 23, 1981
Gary L Statton, West Chester, PA (US);
Stephen H Harris, West Chester, PA (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a dichloroparabanic acid compound having the formula ##STR1## wherein R is an alkyl group of from 1 to 4 carbon atoms or a phenyl group which may be substituted with a 1 to 4 carbon atom alkyl group.