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US 8,772,365 B2Granted
Resin composition for foams and uses thereof
AssigneeMitsui Chemicals, Inc.
InventorsTakayuki Kajihara, Eiji Shiba, Masayoshi Yamaguchi, Kiminori Noda
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AssigneeMitsui Chemicals, Inc.
InventorsTakayuki Kajihara, Eiji Shiba, Masayoshi Yamaguchi, Kiminori Noda
Estimating the term…
The present invention provides a resin composition capable of providing foams (non-crosslinked and crosslinked foams) which have low specific gravity and low compression set (CS) and are excellent in tensile strength properties, tear strength properties and vibration-damping properties at room temperature to high temperatures, and a foam of the resin composition. The resin composition for foams of the present invention comprises 5 to 95 parts by weight of an ethylene/α-olefin copolymer (A) and 5 to 95 parts by weight of a hydrogenated copolymer (B) obtained by hydrogenating a copolymer comprising a conjugated diene and a vinyl aromatic compound, and is characterized in that the hydrogenated copolymer (B) does not have a glass transition point of not higher than −10° C. when measured at a frequency of 1 Hz in accordance with JIS-K7198.
A resin composition for foams, comprising 80 to 95 parts by weight of an ethylene/α-olefin copolymer (A) and 5 to 20 parts by weight of a hydrogenated copolymer (B) obtained by hydrogenating a copolymer consisting of a conjugated diene and a vinyl aromatic compound, wherein the hydrogenated copolymer (B) does not have a glass transition point equal to or lower than −10° C. when measured at a frequency of 1 Hz in accordance with JIS-K7198, and 5 to 50 parts by weight of at least one resin (C) selected from the group consisting of rosin-based resins, terpene-based resins and petroleum resins and/or 5 to 100 parts by weight of an ethylene/polar monomer copolymer (D) based on 100 parts by weight of the total of the ethylene/α-olefin copolymer (A) and the hydrogenated copolymer (B).
Dependencies are inferred from the claim text.