Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1993-04-06
1994-10-25
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
528 17, 528 21, 528 26, 528 28, C08K 509, C08L 6300
Patent
active
053589831
ABSTRACT:
The present invention pertains to a curable silicone composition comprised of (A) an organopolysiloxane represented by the formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group other than an alkenyl group; R.sup.2 is a monovalent hydrocarbon group other than an alkenyl group or hydrogen; R.sup.3 is an organic group that contains an epoxy group or an alkoxysilylalkyl group with the proviso that at least one R.sup.3 group is an organic group containing an epoxy group; a is either 0 or a positive number; b is a positive number; c is a positive number; a/c has a value of between 0 to 4, b/c has a value of between 0.05 to 4, and (a+b)/c has a value of between 0.2 to 4; and (B) a curing compound selected from curing agents or curing catalysts. The curable silicone composition of the present invention has superior curing properties and is capable of forming a hardened silicone material with superior flexibility and heat resistance after curing.
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Crivello and Lee, "The Synthesis, Characterization, and Photoinitiated Cationic Polymerization of Silicon-Containing Epoxy Resins" pp. 480-503 (1990).
Polymer Journal: Chujo, Shishino, and Yamashita; "Synthesis and Application of Polymerizable Silicone Oligmers from Water Glass" pp. 495-504 (1984).
Aylward D.
Dow Corning Toray Silicone Co. Ltd.
Marquis Melvyn I.
Severance Sharon K.
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