Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
1999-06-04
2001-01-16
Nutter, Nathan M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S192000, C525S221000, C525S240000, C525S241000
Reexamination Certificate
active
06174962
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the vulcanization of functionalized para-alkylstyrene/isoolefin copolymers in the presence of thermoplastics with a free radical curing agent such as a peroxide. Some of the alkyl groups of the copolymer are functionalized with an unsaturated compound such as an unsaturated acid.
BACKGROUND OF THE INVENTION
Heretofore, the curing of thermoplastic vulcanizates generally utilize cure systems such as sulfur or various resins. Such curatives generally discolored upon ultraviolet light exposure and did not yield compositions having good ultraviolet light resistance.
SUMMARY OF THE INVENTION
The thermoplastic vulcanizate composition generally has a continuous phase of a thermoplastic and a discontinuous rubber phase comprising a functionalized copolymer of para-alkylstyrene/isoolefin so that the rubber can be cured by a free radical mechanism. Cure can be obtained utilizing any free radical cure source such as radiation, electrical, microwave, or desirably decomposition of various organic peroxides. The various components are dynamically vulcanized at a temperature above the melting point of the thermoplastic or the thermoplastic elastomer.
REFERENCES:
patent: 5013793 (1991-05-01), Wang et al.
patent: 5162445 (1992-11-01), Powers et al.
“Functionalized PMS/IB copolymers offer wide range of properties” by H. C. Wang and K. W. Powers,Elastomerics, Jan./Feb. 1992, by Communication Channels, Inc., Atlanta, GA USA.
“Functionalized PMS/IB copolymers offer wide range of properties-Part II” by H. C. Wang and K. W. Powers,Elastomerics, Jan./Feb. 1992 by Communication Channels Inc., Atlanta, GA USA.
Abdou-Sabet Sabet
Patel Raman
Wang Hsien-Chang
Advanced Elastomer Systems L.P.
Hudak Daniel J.
Nutter Nathan M.
Skinner William A.
LandOfFree
Free radically cured thermoplastic vulcanizates of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Free radically cured thermoplastic vulcanizates of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Free radically cured thermoplastic vulcanizates of a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2536944