| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin composition which can give a blow-molded product improved in toughness, especially impact resistance by rotation molding by adding a specified amount of a crystallization modifier to a polyamide resin. SOLUTION: At most 5 pts.wt. crystallization modifier is added to 100 pts.wt. polyamide resin. The polyamide resin used is desirably nylon 6, nylon 12, a nylon 6/66 copolymer, a nylon 6/12 copolymer or a nylon 6/66/12 terpolymer each of which has a melting point of 230 deg.C or below. The crystallization modifier which can be used is exemplified a sorbitol, a phosphoric or phosphorus acid ester, a higher fatty acid, its metal salt, an ethylenebisamide compound, a mono-higher-fatty acid ester or a polyamide resin having a melting point higher than that of the polyamide used. This composition is molded to obtain blow-molded products such as oil tanks and gasoline tanks used in motor cycles, four-wheel automobiles and leisure and industrial vehicles. |
