Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1999-03-01
2000-12-26
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528170, 528312, 528313, 528319, 528322, 528332, 528335, 528336, 428220, 4284744, 4284745, 4284747, 4284749, 525420, 525432, C08G 7310, B32B 2700, C08L 7700
Patent
active
061661716
ABSTRACT:
A polyamide resin composition comprising 100 parts by weight of a polyamide resin and 0.005 to 1.0 part by weight of at least one compound selected from the group consisting of a metal salt of a fatty acid, a diamide compound and a diester compound. The polyamide resin is obtained by solid phase-polymerizing a polyamide resin prepared by melt-polymerizing a diamine component containing 70 mol % or more of metaxylylenediamine and a dicarboxylic acid component containing 70 mol % or more of adipic acid, and preferably has a relative viscosity of 2.3 to 4.2 when measured at 25.degree. C. using a solution of 1 g polyamide resin in 100 ml of 96% sulfuric acid. By adding at least one compound selected from the group consisting of the specific metal salt of fatty acid, the diamide compound and the diester compound to a solid phase-polymerized polyamide resin, shaped articles such as films, sheets and hollow containers made of the solid phase-polymerized polyamide are improved in the resistance to whitening during storage tinder a high humid condition, upon contacting with water or boiling water, or upon heating to a glass transition temperature or higher.
REFERENCES:
patent: 5268219 (1993-12-01), Harada et al.
Maruyama Katsuya
Shimazaki Hisashi
Takahashi Makoto
Yamamoto Koji
Hampton-Hightower P.
Mitsubishi Gas Chemical Company Inc.
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