Arlene K Hanson

US Patent:

6383324, May 7, 2002

Filed:

Nov 24, 1999

Appl. No.:

09/448125

Inventors:

David E. Vietti - Cary IL
Stephen J. Hobbs - Woodstock IL
Keith B. Potts - Elgin IL
Arlene C. Hanson - Wonder Lake IL

Assignee:

Morton International, Inc. - Chicago IL

International Classification:

B32B 1700

US Classification:

156107, 1563314, 428419, 528 58

Abstract:

An insulated glass sealant having the best characteristics of polysulfides and polyurethanes rather than the worst is made from a polysulfide-based polyurethane prepared by a one-step procedure wherein a randomly copolymeric hydroxyl-terminated polysulfide polyacetal is reacted with a polyisocyanate at a ratio of from about 1:1 to about 1:1. 2 on an equivalents basis. The copolymeric hydroxyl-terminated polysulfide polyacetal is made by the condensation of formaldehyde with a mixture of a dithiodialkylene glycol and an aliphatic or cycloaliphatic diol.