| 摘要 |
PURPOSE:To obtain a resin composition having lowered moisture absorption and improved dimensional stability and hydrolysis resistance, and miscible uniformly over a wide range of the mixing ratio without phase-separation, by mixing a specific polyester-amide with a polyamide. CONSTITUTION:The objective resin is obtained by mixing (A) 5-95pts.wt. of a polyester-amide composed mainly of (i) 10-95wt% polyester unit of formulaI- formula V (k is 8-10; l is 2-6; m is 1-20), e.g. polybutylene terephthalate unit or a unit derived from undecane dicarboxylic acid and ethylene glycol and (ii) 5-90wt% polyamide unit of formula VI or VII[n is 10 or 11; R is (CH2)q or monocyclic aromatic nucleus; p is 6-12; q is 6-10]e.g. a unit derived from 11-aminoundecanoic acid, and (B) 95-5pts.wt. of a polyamide having a relative viscosity of 2.0-5.0 (measured at 25 deg.C by dissolving 1g of the polymer in 100ml of 98% concentrated sulfuric acid). |
