Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1997-12-08
2000-04-04
Warzel, Mark L.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
429176, 525 92D, H01M 202, B29D 2200, B65D 8588, C08L 2312
Patent
active
060458836
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to resin compositions which are excellent in oil resistance, chemical resistance, heat resistance, impact resistance, heat creep resistance and water vapor transmission resistance, and in balance between stiffness and tenacity (elongation) after thermal history which make it possible to utilize them in the electric and electronic fields, automobile field and the fields of other various industrial materials. Further specifically, the present invention relates to resin compositions which are especially suitably usable as materials for containers of secondary batteries such as lithium metal battery and lithium ion battery (which are both referred to as "lithium batteries" hereinafter), nickel-hydrogen battery, lead acid storage battery, and alkaline storage battery.
BACKGROUND ART
Polypropylene resins are superior in processability, water resistance, oil resistance, acid resistance and alkali resistance, but are inferior in heat resistance, rigidity, and impact resistance. Therefore, polyphenylene ether resin is blended with polypropylene resin to form a matrix of the polypropylene resin and dispersion particles of the polyphenylene ether resin, whereby a resin composition improved in heat resistance and rigidity is produced. As prior art, for example, U.S. Pat. No. 3,361,851 discloses blending polyolefin with polyphenylene ether to improve solvent resistance and impact resistance, and U.S. Pat. No. 4,383,082 and EP-A-115712 disclose blending polyphenylene ether with polyolefin and a hydrogenated block copolymer to improve impact resistance.
Furthermore, JP-A-63-113058, JP-A-63-225642, U.S. Pat. No. 4,863,997, JP-A-3-72512, JP-A-4-183748 and JP-A-5-320471 disclose addition of a specific hydrogenated block copolymer to a resin composition comprising polyolefin resin and polyphenyl ether resin to obtain a resin composition excellent in chemical resistance and processability.
Furthermore, JP-A-4-28739 and JP-A-4-28740 disclose that resin compositions excellent in balance between impact strength and rigidity are obtained by preparing resin compositions comprising polyolefin resin, polyphenylene ether resin and a specific block copolymer by a specific process.
Similarly, JP-A-7-166026 discloses that a resin composition obtained by a specific production process is excellent in impact resistance, and JP-A-7-165998 discloses that a resin composition excellent in heat resistance, impact resistance and moldability is obtained by adding a specific hydrogenated block copolymer to a resin composition comprising polyolefin resin and polyphenylene ether resin.
The applicant discloses resin compositions excellent in compatibility, rigidity, heat resistance, and solvent resistance which comprise polyphenylene ether resin, polyolefin resin and a specific hydrogenated block copolymer in JP-A-2-225563, JP-A-3-185058, JP-A-5-70679, JP-A-5-295184, JP-A-6-9828, JP-A-6-16924, JP-A-6-57130 and JP-A-6-136202.
Moreover, as for secondary battery containers, JP-A-6-203814, JP-A-8-22811 and EP-A-0691694 disclose containers comprising polyphenylene ether resin and polystyrene resin.
As seen in the above prior art, a resin composition which is a polymer alloy resin composition comprising polypropylene resin and polyphenylene ether resin and which contains the polyphenylene ether resin as dispersion particles in a matrix of the polypropylene resin is markedly improved in heat resistance and actually is considerably higher than polypropylene resin in deflection temperature under load (DTUL) which serves as an indication of heat resistance of a short period. However, at present, in the use under such environment in which internal or external pressure or load is applied for a long period of time and in addition a high temperature continues, even if improved in heat resistance indicated by deflection temperature under load (DTUL or HDT), endurance and heat resistance over a long period of time do not utterly come up with the deflection temperature under load in practical use.
Heat creep resistanc
REFERENCES:
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patent: 4772657 (1988-09-01), Akiyama et al.
patent: 4863997 (1989-09-01), Shibuya et al.
patent: 5166264 (1992-11-01), Lee, Jr. et al.
Akiyama Yoshikuni
Kusumi Yuji
Shoji Osamu
Asahi Kasei Kogyo Kabushiki Kaisha
Warzel Mark L.
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