Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1997-08-08
1999-02-09
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556444, C09F 708
Patent
active
058697276
ABSTRACT:
Disclosed is an improved process for the manufacture of silicone containing copolymers via a hydrosilation reaction, in which the catalyzed reaction of organohydrosiloxane and olefinic polyether is carried out at between 20.degree.-120.degree. C., preferably 70.degree.-120.degree. C., under a vacuum between 750-1 mmHg. The reaction under these conditions results in a copolymer of a higher quality as compared to copolymers made by the traditional method without the benefit of a vacuum. If desired, the reaction can be taken to its clear point in a volatile compatibilizing solvent (for example toluene, xylene, or isopropyl alcohol), this solvent can then be removed from the reaction system, and another less volatile solvent, such as dipropylene glycol or polypropylene glycol, may then be added.
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Austin Paul E.
Crane William E.
OSi Specialties Inc.
Reiskind Andrew S.
Shaver Paul F.
Welch II Edward K.
Witkowski Timothy X.
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