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:
Aug. 16, 1988
Filed:
Aug. 03, 1987
Michael R Savina, Auburn, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Microcellular foamed or reaction injection molded polyurethane/polyurea elastomers are prepared by reacting an aliphatically bound polyisocyanate, a primary or secondary amine terminated polymer, and an aliphatic diamine chain extender represented by the formulas: ##STR1## wherein A is represented by the group ##STR2## each R, R.sub.1 and R.sub.2 are independently hydrogen or an alkyl group having from 1 to about 4 carbon atoms, x has a value from zero to about 4; y has a value of 1 or 2; z has a value of zero or 1; and when y is 2, z is zero and the sum of y and z is 2 and ##STR3## wherein R is H or alkyl of 1 to 4 carbon atoms and A and A' are NH.sub.2 or H with the provisos that in each ring either A or A' is NH.sub.2, not both and when A or A' is NH.sub.2 then the R attached to that carbon atom is H.