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. 25, 1992
Filed:
Nov. 20, 1989
Francis J Walker, Maple Grove, MN (US);
Vernon C Ralph, Minneapolis, MN (US);
Donald F Beauchaine, Minneapolis, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A method of molding articles having layers or sections of varying hardness in which the interface between the diverse hardness consists of a permanent homogeneous intermaterial crosslink and therefore continuous chemical bond. The invention contemplates using combinations of selected peroxide catalyzed reactions to crosslink very high molecular weight, heat curable, high consistency polymers of diverse cured hardness across composition boundaries. The technique involves combining selected heat-curable materials of various hardnesses and combining each with selected peroxide crosslinking catalysts having various half-lifes with respect to free radical decay.