Invention Grant
- Patent Title: Thermoplastic vulcanizates having improved fabricability
- Patent Title (中): 具有改进的可加工性的热塑性硫化橡胶
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Application No.: US11251516Application Date: 2005-10-14
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Publication No.: US07829623B2Publication Date: 2010-11-09
- Inventor: Trazollah Ouhadi , Kang-Bo Wang
- Applicant: Trazollah Ouhadi , Kang-Bo Wang
- Applicant Address: US TX Houston
- Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee Address: US TX Houston
- Main IPC: C09B67/00
- IPC: C09B67/00 ; C08K5/00 ; C08L23/00

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.
Public/Granted literature
- US20060100347A1 Thermoplastic vulcanizates having improved fabricability Public/Granted day:2006-05-11
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