Methods of making polysiloxanes

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

556460, 556479, C08G 7708

Patent

active

055168701

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 .ident.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: 2469890 (1949-05-01), Patnode
patent: 2491843 (1949-12-01), Wilcock
patent: 2823218 (1958-02-01), Speier
patent: 3484468 (1969-12-01), Curry
patent: 4160775 (1979-07-01), Schilling, Jr.
patent: 5017221 (1991-05-01), Le Grow
patent: 5359113 (1994-10-01), Bank
patent: 5395956 (1995-03-01), Haines
European Polymer Journal, vol. 29 No. 1, pp. 15-22, (1993).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

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

     

Profile ID: LFUS-PAI-O-1896624

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.