Organopolysiloxane microemulsion, process for its production and

Details Organopolysiloxane microemulsion, process for its production and Organopolysiloxane microemulsion, process for its production and

1988-04-28

1990-06-19

Ivy, C. Warren

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...

524838, C08L 8308, C08L 8306

Patent

active

049354647

ABSTRACT:
A microemulsion with an average particle size not exceeding 0.15 micrometers or organopolysiloxane composed of trifunctional siloxane units with the formula RSiO.sub.3/2 and difunctional siloxane units with the formula R.sup.1.sub.2 SiO is characterized by transparency, by excellent mechanical, dilution, and blending stabilities and by an excellent stability against pH variations. The microemulsion is prepared by process comprising the slow addition, to an aqueous emulsion-polymerization catalyst solution, of a crude emulsion prepared from an organotrialkoxysilane having the formula RSi(OR.sup.1).sub.3, a cyclic organopolysiloxane having the formula (R.sup.1.sub.2 SiO).sub.n, a surfactant, and water. A microemulsion which consists of 30 to 95 mol % trifunctional siloxane units and 70 to 5 mol % difunctional siloxane units is useful as a fiber-treatment agent that can impart slip resistance to fibrous material without stiffening the hand, while at the same time not causing oil spots.

REFERENCES:
patent: 3975294 (1976-08-01), Dumoulin
patent: 4228054 (1980-10-01), Ona et al.
patent: 4476282 (1984-10-01), Koerner
patent: 4620878 (1986-11-01), Gee
patent: 4696969 (1987-09-01), Thimineur

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