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. 28, 2001
Filed:
Jun. 30, 2000
John L. Hanley, IV, Sterling Heights, MI (US);
Norman E. Blank, Wayne, NJ (US);
Sika Corporation, Lyndhurst, NJ (US);
Abstract
An expansion temperature tolerant, dry, expandable sealant and baffle is provided which is capable of undergoing a desired degree of full expansion when an automobile body containing the sealant and baffle product is conveyed through a conventional bake and/or curing oven. The sealant and baffle product is fully expandable over a wider temperature and time range than heretofore available expandable baffle products. The composition for preparation of a molded expandable sealant and baffle component includes a grafted anhydride polymer, an epoxide terminated additive polymer which are capable of reacting with the grafted anhydride polymer and a blowing agent. The anhydride polymer and the epoxide terminated polymer react to a limited degree in the absence of a catalyst when the baffle product is heated in the bake and/or curing oven, thus providing an improved networked and bridged backbone polymer which effectively entraps gas emanating from the blowing agent, without adversely affecting the flexibility and expansion characteristics of the sealant baffles.