Method for producing isocyanate group-containing siloxane...

Details Method for producing isocyanate group-containing siloxane... Method for producing isocyanate group-containing siloxane...

2007-08-01

2009-08-18

Price, Elvis O (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

C556S414000, C556S406000, C556S460000

Reexamination Certificate

active

07576231

ABSTRACT:
A method for producing an isocyanate group-containing siloxane compound is provided. In this method, a halogenated siloxane compound represented by the following general formula (1):or the following general formula (2)wherein R1, R2, R3, and R4are independently hydrogen atom, a monovalent hydrocarbon group containing 1 to 8 carbon atoms, or a siloxy group represented by OSiR5R6R7wherein R8, R6, and R7are a monovalent hydrocarbon group containing 1 to 8 carbon atoms, X is a halogen atom, n is an integer of 1 to 10, a is 0, 1, or 2, and b is an integer of 2 to 9; is reacted with a cyanate salt represented by the following general formula (3):in-line-formulae description="In-line Formulae" end="lead"?Mm+(OCN)m  (3)in-line-formulae description="In-line Formulae" end="tail"?wherein M represents an alkali metal or an alkaline earth metal, and m is 1 or 2. The isocyanate group-containing siloxane compound produced is represented by the following general formula (4):or the following general formula (5):wherein R1, R2, R3, R4, n, q, and a are as defined above.

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European Search Report dated Nov. 14, 2007, issued in corresponding European Patent application No. 07 25 3013.
Database WPI Week 200136, Derwent Publications Ltd., London, GB, AN 2001-337802, XP002457180 & JP 2001 026593A.

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