Patent ID: 6956081

Claim:
Reinforced thermoplastic polyamide molding materials having simultaneously good surface quality, good flowability and good heat dimensional stability comprising a polyamide composition comprising: 85-92 wt. % of a semi-crystalline semi-aromatic (co)polyamide having a melting point of at least 240° C., formed by (A 1 ) 50-80 mol % of units of terephthalic acid based on the whole amount of total acids, (A 2 ) 20-50 mol % of units of isophthalic acid based on the whole amount of total acids, the sum total of units of dicarboxylic acids being 100 mol %, and (A 3 ) 100 mol % of units of at least one linear or branched aliphatic diamine having 4-25 carbon atoms, the percentage molar amount of phthalic acids in said semi-crystalline semi-aromatic (co)polyamide being 100 mol % and the percentage molar amount of diamines being 100 mol %, and 8-15 wt. % of amorphous (co)polyamides having a melting enthalpy of not more than 1 cal/g, formed by (B 1 ) 55-100 mol % of units of isophthalic acid based on the whole amount of total acids, (B 2 ) 0-45 mol % of units of terephthalic acid based on the whole amount of total acids, (B 3 ) 100 mol % of units of at least one linear or branched aliphatic diamine having 4-25 carbon atoms based on the whole amount of present diamines the percentage molar amount of phthalic acids in said semi-crystalline semi-aromatic (co)polyamide being 100 mol % and the percentage molar amount of diamines being 100 mol %, and said molding material further comprises: 25-70 wt. % of a fibrous or particle filler or mixtures thereof 0-20 wt. % of a elastomer, and up to 30 wt. % of usual additives and processing aid agents based on the total amount of said molding materials.