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
2005-10-14
2010-11-09
Cheung, William K (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...
C524S515000, C525S240000
Reexamination Certificate
active
07829623
ABSTRACT:
A TPV composition having improved fabricability and surface appearance is achieved by a process for preparing a thermoplastic vulcanizate composition having a dispersed, cross-linked rubber phase in a continuous thermoplastic polypropylene phase comprising: a) providing into melt processing equipment at least the following components; i) at least one thermoplastic polypropylene homopolymer or copolymer having a melt temperature greater than 120° C.; ii) 6-12 wt. %, based on the total weight of the thermoplastic vulcanizate composition, at least one propylene copolymer having from 7 to 30 wt. % ethylene, based upon the weight of the random propylene copolymer, and a melting point less than 120° C.; iii) at least one cross-linkable rubber, where, if including an ethylene copolymer rubber, said copolymer rubber having equal to or more than 40 wt. % the total copolymer rubber weight; b) melt processing the blend of i), ii), and iii) of a); c) dynamically vulcanizing the cross-linkable rubber iii) in the presence of the thermoplastic i) and random copolymer ii); and d) removing a thermoplastic vulcanizate product of c) from the melt processing equipment, wherein the dispersed, cross-linked rubber phase of the product thermoplastic vulcanizate d) consists of particles having an effective diameter not greater than 2 millimicrons.
REFERENCES:
patent: 2972600 (1961-02-01), Braidwood
patent: 3248179 (1966-04-01), Norwood
patent: 3287440 (1966-11-01), Giller et al.
patent: 4130535 (1978-12-01), Coran et al.
patent: 4311628 (1982-01-01), Abdou-Sabet et al.
patent: 4543399 (1985-09-01), Jenkins, III et al.
patent: 4588790 (1986-05-01), Jenkins, III et al.
patent: 4594390 (1986-06-01), Abdou-Sabet et al.
patent: 4613484 (1986-09-01), Ayres et al.
patent: 5001205 (1991-03-01), Hoel
patent: 5028670 (1991-07-01), Chinh et al.
patent: 5177147 (1993-01-01), Spenadel et al.
patent: 5317036 (1994-05-01), Brady, III et al.
patent: 5349005 (1994-09-01), Tanaka
patent: 5352749 (1994-10-01), DeChellis et al.
patent: 5405922 (1995-04-01), DeChellis et al.
patent: 5436304 (1995-07-01), Griffin et al.
patent: 5453471 (1995-09-01), Bernier et al.
patent: 5462999 (1995-10-01), Griffin et al.
patent: 5616661 (1997-04-01), Eisinger et al.
patent: 5627242 (1997-05-01), Jacobsen et al.
patent: 5656693 (1997-08-01), Ellul et al.
patent: 5665818 (1997-09-01), Tilston et al.
patent: 5668228 (1997-09-01), Chinh et al.
patent: 5677375 (1997-10-01), Rifi et al.
patent: 5693727 (1997-12-01), Goode et al.
patent: 5712352 (1998-01-01), Brant et al.
patent: 6147160 (2000-11-01), Wang et al.
patent: 6245856 (2001-06-01), Kaufman
patent: 6288171 (2001-09-01), Finerman et al.
patent: 6342565 (2002-01-01), Cheng
patent: 6368700 (2002-04-01), Venkataswamy et al.
patent: 6407174 (2002-06-01), Ouhadi
patent: 6433090 (2002-08-01), Ellul et al.
patent: 6525157 (2003-02-01), Cozewith
patent: 6642316 (2003-11-01), Datta
patent: 6713520 (2004-03-01), Sahnoune
patent: 2003/0204017 (2003-10-01), Stevens et al.
patent: 2004/0024146 (2004-02-01), Friedersdorf
patent: 0 265 075 (1988-04-01), None
patent: 0 634 421 (1995-01-01), None
patent: 0 794 200 (1997-09-01), None
patent: 0802202 (1997-10-01), None
patent: 0 969 043 (2000-01-01), None
patent: WO 96/33227 (1996-10-01), None
patent: WO 97/22639 (1997-06-01), None
patent: WO 02/051634 (2002-07-01), None
patent: WO 03/040201 (2003-05-01), None
Ellul et al., “Chemical Surface Treatments of Natural Rubber and EPDM Thermoplastic Elastomers: Effects on Friction and Adhesion, Rubber Chemistry and Technology,” vol. 67, No. 4 (1994).
Ouhadi Trazollah
Wang Kang-Bo
Cheung William K
ExxonMobil Chemical Patents Inc.
LandOfFree
Thermoplastic vulcanizates having improved fabricability does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermoplastic vulcanizates having improved fabricability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermoplastic vulcanizates having improved fabricability will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4197317