Compositional additive comprising terpolymeric fluid
AssigneeGeneral Electric Company
InventorsEdwin R. Evans, Gregory H. Slocum
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Abstract
Methyl- and phenyl-containing fluorosilicone terpolymeric fluids over the range of 30 cps to 200,000 cps are effective as additives for various uses. Over the range of 16,000 to 200,000 cps, the fluids are effective as additives in promoting a finger transferable self-bleed of lubricant in fluorosilicone-containing heat-curable rubber compositions, even after a post-bake of the composition. Over the viscosity range of 30 cps to 1000 cps, the fluids are useful in personal care and cosmetic products as water and oil repellency additives. Methods of ring opening polymerization are used to produce the terpolymeric fluids from cyclic reactants.
Claims3
A method of producing a phenol-containing block terpolymeric fluorosilicone fluid, said process comprising the steps of:
- mixing together in a reaction vessel (A) a fluorosilicone cyclic oligomer, (B) a methylsiloxane cyclic oligomer, (C) a phenylsiloxane cyclic oligomer, and (D) a chain stopper to form a mixture of cyclic oligomers;
- mixing said mixture of cyclic oligomers with a catalytic amount of ring opening catalyst;
- mixing said mixture of cyclic oligomers with a promoter, wherein said promoter is at least one member selected from the group consisting of polyethylene glycol and methoxy-terminated polyethyleneglycol;
- and
- allowing the mixture to react in the presence of said catalyst at a temperature ranging form about 130.degree. C. to about 160.degree. C. for a period of time of about at least ten hours to form a phenol-containing fluorosilicone terpolymeric fluid;
- whereby said terpolymeric fluid has a volatiles content of less than 5.0 weight percent, a viscosity ranging from 30 centipoise to 200M centipoise at 25.degree. C. and a substantially homogeneous distribution of the said individual oligomers in said block terpolymer.
Dependencies are inferred from the claim text.