Polyamide moulding compound and moulded articles produced therefrom
AssigneeEms-Patent AG
InventorsChristian Schubert, Botho Hoffmann, Andreas Bayer
Life of this patent
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Abstract
Disclosed is a polyamide moulding compound formed from a mixture of partially crystalline, aliphatic polyamides and partially crystalline, partially aromatic polyamides and also fibrous reinforcing materials. The partially crystalline, partially aromatic polyamides are thereby formed from a diamine component, a dicarboxylic acid component and possibly a lactam- and/or ω-amino acid component. The mixture and/or the moulding compound can include further components. Moulded articles produced from these moulding compounds are used, for example, in the automobile sphere, in the household sphere, in measuring, regulating and control technology or in mechanical engineering.
Claims15
A polyamide moulding compound comprising:
- (I) 40 to 100% by weight of a mixture made of
- (A) 68 to 88% by weight of at least one partially crystalline, aliphatic polyamide and
- (B) 12 to 32% by weight of at least one partially crystalline, partially aromatic polyamide, formed from a diamine component (Ba), a dicarboxylic acid component (Bb), and optionally a lactam- and/or ω-amino acid component (Bc), wherein the diamine component (Ba) is present essentially in equimolar amount to the dicarboxylic acid component (Bb), the quantity of lactam- and/or ω-amino acid component (Bc) is 0 to 15% by mol, and the sum of components (Ba) to (Bc) is 100% by mol, wherein the diamine component (Ba) consists of
- (Ba1) 62 to 96 mol-parts of 1,6-hexanediamine,
- (Ba2) 4 to 38 mol-parts of bis(aminomethyl)cyclohexane, and
- (Ba3) 0 to 30 mol-parts of one or more cycloaliphatic diamines, different from (Ba2), wherein the sum of (Ba2) and (Ba3) is 4 to 38 mol-parts and the sum of (Ba1), (Ba2) and (Ba3) is 100 mol-parts,
- the dicarboxylic acid component (Bb) consists of
- (Bb1) 64 to 100 mol-parts of terephthalic acid,
- (Bb2) 0 to 18 mol-parts of isophthalic acid, and
- (Bb3) 0 to 18 mol-parts of one or more aliphatic dicarboxylic acids with 6 to 18 C atoms, wherein the sum of (Bb1), (Bb2) and (Bb3) is 100 mol-parts, and
- the lactam- and/or ω-amino acid component (Bc) consists of one or more lactams and/or ω-amino acids, wherein the sum of the lactams and/or ω-amino acids is 100 mol-parts, and
- the proportions of (A) and (B) are related to the sum of the polyamides (A) and (B) and constitute in total 100% by weight of the mixture,
- (II) 0-60% by weight of fibrous reinforcing materials;
- (III) 0-30% by weight of particulate fillers, different from (II) and (IV) to (VI);
- (IV) 0-20% by weight of impact modifiers;
- (V) 0-2.0% by weight of heat stabilisers;
- (VI) 0-6% by weight of auxiliary materials and/or additives different from (II)-(V);
- the sum of components (I)-(VI) constituting 100% by weight of the polyamide moulding compound.
Dependencies are inferred from the claim text.