Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-08-28
1998-12-01
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524265, 524267, 525100, 525104, 525106, 525398, 525431, 525446, 525479, C08K 524
Patent
active
058440313
ABSTRACT:
A method of dispersing silicone compositions in organic thermoplastic materials is disclosed. The novel compositions produced by the method of the invention have a fine and relatively uniform dispersion or organosilicone in an organic thermoplastic. An organosilicone resin (A) and a predominantly linear silicone fluid (B) are first blended to substantial homogeneity to form an organosilicone alloy therefrom. The organosilicone alloy exhibits thermoplastic behavior and has a temperature-dependent complex viscosity .eta.*.sub.Si (T) associated therewith. Likewise the organic thermoplastic materials have a temperature-dependent complex viscosity, .eta.*.sub.OTP (T), associated therewith. The organic thermoplastic and the organosilicone alloy are thereafter mixed at a predetermined mixing temperature, T.sub.m, and a predetermined shear strain rate. The organic thermoplastic material and the organosilicone alloy are both in a flowable state at T.sub.m. The value of T.sub.m is selected to be about .+-.30.degree. C. of a temperature, T.sub.0, wherein the absolute value of {72*.sub.OTP (T.sub.0)-.eta.*.sub.Si (T.sub.0)} is at its lowest value, at the predetermined shear strain rate.
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Chen Wei
Lupton Kevin Edward
Romenesko David Joseph
Schmidt Randall Gene
Zhang Hongxi
Dow Corning Corporation
Jarnholm Arne R.
Marquis Melvyn I.
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