Olefin-based crosslinked thermoplastic elastomers and a process of preparation thereof
AssigneeHonam Petrochemical Corporation
InventorsHo Jin Chee, Min Jae Hwang, Byung Yun Lim, Chang Hyoo Choi
Life of this patent
Estimating the term…
Abstract
There is provided olefin-based cross-linked thermoplastic elastomers and a preparation method thereof. The TPE comprises a thermoplastic polyolefin resin; an ethylene-propylene-dien rubber; an ethylene-octene copolymer; and a phenolic cross-linking agent. The TPE shows good tensile strength, tension set and compression set.
Claims9
An olefin-based crosslinked thermoplastic elastomer comprising, based on 100 parts by weight of following (A)+(B)+(C),
- (A) 17-82 parts by weight of a thermoplastic polyolefin resin;
- (B) 14.2-76 parts by weight of an ethylene-propylene-diene rubber which satisfies the following conditions;
- (a) propylene content:
- 10-50 wt %
- (b) Mooney viscosity at 100.degree. C.:
- 20-100 ML.sub.1+4
- (C) 3.8-76 parts by weight of an ethylene-octene copolymer which satisfies the following conditions;
- (a) octene content:
- 9.5-30 wt %
- (b) melt index:
- 0.3-30 dg/min.;
- and
- (D) 1-15 parts by weight of a phenolic crosslinking agent.
A method for preparing an olefin-based crosslinked thermoplastic elastomer, which comprises step of dynamical vulcanization following components (A)-(D) at a temperature of 170-220.degree. C., 30-120 rpm during retention time of 5-20 minutes,
- (A) 17-82 parts by weight of a thermoplastic polyolefin resin;
- (B) 14.2-76 parts by weight of an ethylene-propylene-diene rubber which satisfies the following conditions;
- (a) propylene content:
- 10-50 wt %
- (b) Mooney viscosity at 100.degree. C.:
- 20-100 ML.sub.1+4
- (C) 3.8-76 parts by weight of an ethylene-octene copolymer which satisfies the following conditions;
- (a) octene content:
- 9.5-30 wt %
- (b) melt index:
- 0.3-30 dg/min.;
- and
- (D) 1-15 parts by weight of a phenolic crosslinking agent, wherein said parts by weight being based on 100 parts by weight of (A)+(B)+(C).
Dependencies are inferred from the claim text.