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. 03, 1987
Filed:
Jun. 30, 1986
Llewellyn D Booth, Lake Jackson, TX (US);
Jimmie D Christen, Lake Jackson, TX (US);
William D Clarke, Brazoria, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
This invention is an improvement in a process for preparing a molded rigid polyurethane or polyurethane-polyurea foam wherein a polyol having an average of at least 3 hydroxyl groups per molecule is reacted with a polyisocyanate in a mold in the presence of a blowing agent under conditions such that a rigid polyurethane or polyurethane-polyurea foam is formed. The improvement comprises employing as all or a portion of said polyol an aminoalkylpiperazine-initiated polyol having an equivalent weight from about 87 to about 500, said aminoalkylpiperazine-initiated polyol being employed in an amount sufficient to increase the cure rate of the foam relative to a similar foam prepared in the absence of the aminoalkylpiperazine-initiated polyol. Excellent flowability k-factors and rapid cures are obtained according to the invention.