Process for preparing functionalized polyorganosiloxane...

Details Process for preparing functionalized polyorganosiloxane... Process for preparing functionalized polyorganosiloxane...

2003-03-20

2008-08-12

Zimmer, Marc S (Department: 1796)

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

Synthetic resins

From silicon reactant having at least one...

C528S025000, C528S031000

Reexamination Certificate

active

07411028

ABSTRACT:
The invention provides a method for preparing functionalized polyorganosiloxane resins (POS) comprising units M: (R3SiO1/2), Q: (SiO4/2) and M′: (YaR3-aSiO1/2) and optionally D: (R2SiO2/2) and/or D′: (RYSiO2/2) and T: (RSiO3/2) and/or T′: (YSiO3/2), wherein in said units R is C1-C10, alkyl or C8-C12, aryl and Y is a functional group (such as Si—H), by redistributing POS resins, using POSf bearing functional groups M′ and/or D′ and/or in the presence of an acid catalyst such as triflic acid or one of its derivatives and a non-basic inert filler: carbon black, diatomaceous earth, zeolite or acid or neutral oxide (Al2O3, Na2O, TiO2, MgO, silica). The invention also provides said catalyst system.

REFERENCES:
patent: 2676182 (1954-04-01), Daudt et al.
patent: 2814601 (1957-11-01), Currie et al.
patent: 2857356 (1958-10-01), Goodwin, Jr.
patent: 4020043 (1977-04-01), Siefken
patent: 4222952 (1980-09-01), Vick
patent: 4448927 (1984-05-01), Falender et al.
patent: 4707531 (1987-11-01), Shirahata
patent: 4774310 (1988-09-01), Butler
patent: 4963438 (1990-10-01), Weitemeyer et al.
patent: 5223595 (1993-06-01), Stepp et al.
patent: 5494979 (1996-02-01), Ebbrecht et al.
patent: 5510430 (1996-04-01), Rubinsztajn et al.
patent: 5527873 (1996-06-01), Kobayashi et al.
patent: 5919883 (1999-07-01), Dittrich et al.
patent: 7074874 (2006-07-01), Kobayashi et al.
patent: 2003/0109659 (2003-06-01), Bordone et al.
patent: 3 810 140 (1989-10-01), None
patent: 2 303 040 (1976-10-01), None
patent: 01/44349 (2001-06-01), None
Patent Abstracts of Japan, vol. 011, No. 200 (C-431), Jun. 27, 1987 (abstract of JP 62 020531A).
Koppel et al.,J. Am. Chem. Soc., 116, 3047-3057 (1994), published by American Chemical Society, Washington, D.C.

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