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. 17, 1987
Filed:
Apr. 11, 1986
Heinz G Gilch, Bad Homburg, DE;
Wolfgang Haar, Oberursel, DE;
USM Corporation, Farmington, CT (US);
Abstract
The specification is concerned with sealant compositions comprising prepolymers which are capable of being cured by atmospheric moisture. The compositions provide a desirable blend of properties with regard to application and use, using prepolymers derived from comparatively inexpensive raw materials. The prepolymers correspond to a reaction product of an at least substantially linear acrylate ester polymer having a Tg of not greater than 10.degree. C. with a hydrolysable silane having a saturated organo-functional group, the reaction product being a fluid material soluble in organic solvents and curable by exposure to atmospheric moisture to a resilient solid. The prepolymer is a silane-modified polymer which preferably has from 2 to 3 hydrolysable silane groups per molecule of prepolymer and from 1 to 3 hydrolysable groups per silane group. Preferred acrylate ester polymers are homo- or co-polymers of butyl acrylate; copolymers may contain other acrylate monomers and or may contain up to 50 wt % vinyl monomer e.g. styrene. Preferred silanes are amino-silanes particularly those having 2 or 3 hydrolysable alkoxy groups. Also described and claimed are methods of making the prepolymers. The compositions are suited for construction and glazing sealants.