C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/58 (2006.01) B32B 27/04 (2006.01) B32B 27/38 (2006.01) C08G 18/00 (2006.01) C08G 18/09 (2006.01) C08G 59/02 (2006.01) C08G 59/28 (2006.01) C08L 63/10 (2006.01) C09D 163/10 (2006.01) H01B 3/30 (2006.01) H05K 1/03 (2006.01)
Patent
CA 2018265
ABSTRACT Epoxy-Terminated Polyoxazolidones, Process for the Preparation thereof and Electrical Laminates made from the Epoxy-Terminated Polyoxazolidones. Epoxy-terminated polyoxazolidone having from 5 to 30 weight percent of the isocyanate content are described. These polyoxazolidone are prepared by a process in which various process parameters are controlled in a targeted manner to give a product having from 50 to 100 percent of isocyanate groups converted to oxazolidone rings and from 0 to 50 percent of the isocyanate groups converted to isocyanurate rings. These epoxy terminated polyoxazolidones exhibit high glass transition temperatures and high resistance to chemicals when cured. They are useful for the preparation of electrical laminates, particularly laminates used in the preparation of electrical circuit boards. 37,100-F
Gan Joseph
Koenig Raymond A.
Smart & Biggar
The Dow Chemical Company
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