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Title:
ETHYLENE/α-OLEFIN COPOLYMER FOR FOAM PRODUCTION, RESIN COMPOSITION FOR FOAM PRODUCTION, AND METHOD FOR PRODUCING FOAM
Document Type and Number:
WIPO Patent Application WO/2011/132790
Kind Code:
A1
Abstract:
Disclosed is an ethlyene/α-olefin copolymer—which is for foam production and has a monomer unit based on ethylene and a monomer unit based on an α-olefin having a carbon number of 3-20—wherein the melt flow rate is 0.1-100 g/10 minutes, the density is 850-940 kg/m3, the molecular weight distribution is 2-12, the swelling ratio is at least 1.61, and g* defined in the belowmentioned formula (I) is 0.50-0.78. g* = [η] / ([η]GPC × gSCB*)...(I) [In the formula, [η] represents the limiting viscosity (units: dl/g) of the ethlyene/α-olefin copolymer, and is defined by the belowmentioned formula (I-I). [η]GPC is defined by the belowmentioned formula (I-II). [η] = 23.3 × log (ηrel)...(I-I) (In the formula, ηrel represents the relative viscosity of the ethlyene/α-olefin copolymer.) [η]GPC = 0.00046 × Mv0.725...(I-II) (In the formula, Mv represents the viscosity average molecular weight of the ethlyene/α-olefin copolymer.) gSCB* = (1 - A)1.725...(I-III) (In the formula, A is determined from the amount of short-chain branching of the ethlyene/α-olefin copolymer.)]

Inventors:
MANAMI TOSHIHIKO (JP)
NOZUE YOSHINOBU (JP)
Application Number:
PCT/JP2011/060000
Publication Date:
October 27, 2011
Filing Date:
April 19, 2011
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Assignee:
SUMITOMO CHEMICAL CO (JP)
MANAMI TOSHIHIKO (JP)
NOZUE YOSHINOBU (JP)
International Classes:
C08J9/06; C08F210/16
Domestic Patent References:
WO2011074485A12011-06-23
WO2010137734A12010-12-02
Foreign References:
JP2010138385A2010-06-24
JP2011126926A2011-06-30
JP2010202791A2010-09-16
JP2004256617A2004-09-16
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
Nakayama 亨 (JP)
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Claims: