Methods of making polysiloxanes

Details Methods of making polysiloxanes Methods of making polysiloxanes

1996-02-05

1996-11-26

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 23, 525478, 525479, 556479, C08G 7708

Patent

active

055786928

ABSTRACT:
Linear or straight-chain trimethylsiloxy endcapped methylhydrogen polysiloxanes are made by contacting hexamethyldisiloxane with a highly pure methylhydrogen cyclic siloxane, in the presence of anhydrous trifluoromethane sulfonic acid catalyst at room temperature. Trimethylsiloxy endcapped alkylmethyl siloxanes are made by reacting the linear or straight-chain trimethylsiloxy endcapped methylhydrogen polysiloxanes with an alpha-olefin, in the presence of a platinum catalyst. Alkylmethyl cyclic siloxanes containing zero parts per million residual .tbd.SiH, are made by reacting anhydrous alpha-olefins and a highly pure methylhydrogen cyclic siloxane, in the presence of dried platinum supported on carbon catalyst.

REFERENCES:
patent: 2823218 (1958-02-01), Speier et al.
patent: 2970150 (1961-01-01), Bailey
patent: 3159662 (1964-12-01), Ashby
patent: 3249581 (1966-05-01), Nelson
patent: 5493041 (1996-02-01), Biggs et al.

Affiliated with

Also associated with

Rating

Methods of making polysiloxanes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of making polysiloxanes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of making polysiloxanes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1973888