US 6,982,293 B2
Olefin type thermoplastic elastomer
Gakuji Shin, Mie (Japan); and Tatsumi Tsuji, Mie (Japan)
Assigned to Mitsubishi Chemical Corporation, Tokyo (Japan)
Filed on Jun. 09, 2004, as Appl. No. 10/863,366.
Application 10/863366 is a continuation of application No. 10/291872, filed on Nov. 12, 2002, granted, now 6,765,052.
Claims priority of application No. 2001-347859 (JP), filed on Nov. 13, 2001.
Prior Publication US 2004/0225067 A1, Nov. 11, 2004
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 8/00 (2006.01)
U.S. Cl. 524—191 32 Claims
OG exemplary drawing
 
1. An olefin thermoplastic elastomer comprising domains of a crosslinked olefin copolymer rubber dispersed in an olefin resin, wherein said domains have an average particle size of from 0.1 to 5 μm and the olefin resin is dispersed in an average particle size of from 0.01 to 0.5 μm in at least a part of the domains, and wherein the following formulae (I) to (III) are satisfied:
Y≤−2X+350  (I)
X<95  (II)
Z≤150  (III)
wherein:
X is the JIS A hardness of a molded product measured in accordance with JIS K6253;
Y is the change in the weight in % of a molded product measured based on JIS K6258 using IRM903 oil at 120° C.; and
Z is the number of granular structures on an 250 mm×1,500 mm extruded sheet surface.