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...
Reexamination Certificate
2007-01-17
2010-11-16
Gulakowski, Randy (Department: 1796)
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...
C528S014000, C528S016000, C528S018000, C528S027000
Reexamination Certificate
active
07834082
ABSTRACT:
A method of making a polyether-polydialkylsiloxane block copolymer is provided. The method comprises providing a mixture comprising at least one alkylene oxide and at least one silanol-terminated polydialkylsiloxane; and polymerizing the mixture in the presence of a double metal cyanide complex catalyst, and optionally in the presence of an aprotic solvent and/or an antioxidant. A polyether-polydialkylsiloxane block copolymer having a molecular weight of 150-50,000 g/mole and having a polydispersity index of 1.0 to 1.5 made by the above method is also provided.
REFERENCES:
patent: 2834748 (1958-05-01), Bailey et al.
patent: 2917480 (1959-12-01), Bailey et al.
patent: 3182076 (1965-05-01), Holdstock
patent: 3792073 (1974-02-01), Mahopac et al.
patent: 4499149 (1985-02-01), Berger
patent: 5134172 (1992-07-01), Bruyninckx et al.
patent: 5777177 (1998-07-01), Pazos
patent: 5856369 (1999-01-01), Jorgenson et al.
patent: 5880245 (1999-03-01), Fujita et al.
patent: 6429342 (2002-08-01), Clement et al.
patent: 6569980 (2003-05-01), Masaoka et al.
patent: 2002/0013427 (2002-01-01), Tsuji et al.
patent: 2008/0045687 (2008-02-01), Nguyen et al.
patent: 485 637 (1997-04-01), None
patent: 802688 (1958-10-01), None
patent: WO2006106362 (2006-10-01), None
Block Copolymers; Overview and Critical Survey, (month unavailable) 1977, A. Noshay and J.E. McGrath, p. 400-402 and 451, Siloxane-Alkylene Ether.
Encyclopedia of Polymer Science and Engineering, vol. 15, 2ndedition, (date unavailable) p. 243-244, Marks et al, “Silicones”.
Chung James Y. J.
Dormish Jeffrey F.
Haider Karl W.
Hortelano Edwin R.
Starcher Rick V.
Bayer MaterialScience LLC
Cheung Noland J.
Gulakowski Randy
Klemz Robert S.
Nelson Lindsay
LandOfFree
Polyether-polysiloxane polyols does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyether-polysiloxane polyols, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyether-polysiloxane polyols will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4183730