Impact resistant transparent polyamide alloys
First Claim
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1. A transparent polyamide alloy, with a TG of>
- 120°
C. produced by compounding from 70-98% by weight of a transparent, amorphous, rigid and/or brittle polyamide A with a glass transition point of at least 180°
C. containing not more than 25 mol % of a lactam or a ω
-aminocarbonic acid with a carbon number of 6-12, at least 35 mol % of a cycloaliphatic diamine, and dicarbonic acids except terephthalic acid and 2-30% by weight of a transparent amorphous, impact resistant polyamide B with a glass transition point below 90°
C., containing 50-80 mol % of at least one long-chain lactam or co-aminocarbonic acid or diamine/dicarbonic acid pair with more than 10 carbon atoms, and a diamine of C6 carbon atoms and at least 10 mole % terephthalic acid, wherein the polyamide B, besides the terephthalic acid, contain further dicarbonic acids selected from the group consisting of isophthalic acid, 2,6-naphthaline dicarbonic acid, tributylisophthalic acid, azeleinic acid, sabacinic acid, dodecanedioic acid or a C36-dicarbonic acid and their mixtures.
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Abstract
The invention concerns a transparent polyamide alloy, produced by compounding it from 30-98% by weight of a transparent, amorphous, rigid and brittle polyamide A with at least 35 mole % cyclo-aliphatic diamine and a glass transition point of at least 150° C., and 2-70% by weight of a transparent, impact resistant polyamide B with at least 40-80 mole % of at least one long-chain polyamide-forming monomer, with more than 10 carbon atoms and at least 10 mole % terephthalic acid and a glass transition point of under 70° C.
21 Citations
6 Claims
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1. A transparent polyamide alloy, with a TG of>
- 120°
C. produced by compounding from 70-98% by weight of a transparent, amorphous, rigid and/or brittle polyamide A with a glass transition point of at least 180°
C. containing not more than 25 mol % of a lactam or a ω
-aminocarbonic acid with a carbon number of 6-12, at least 35 mol % of a cycloaliphatic diamine, and dicarbonic acids except terephthalic acid and 2-30% by weight of a transparent amorphous, impact resistant polyamide B with a glass transition point below 90°
C., containing 50-80 mol % of at least one long-chain lactam or co-aminocarbonic acid or diamine/dicarbonic acid pair with more than 10 carbon atoms, and a diamine of C6 carbon atoms and at least 10 mole % terephthalic acid, wherein the polyamide B, besides the terephthalic acid, contain further dicarbonic acids selected from the group consisting of isophthalic acid, 2,6-naphthaline dicarbonic acid, tributylisophthalic acid, azeleinic acid, sabacinic acid, dodecanedioic acid or a C36-dicarbonic acid and their mixtures. - View Dependent Claims (2, 3)
- 120°
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4. A transparent polyamide alloy, with a TG of>
- 120°
C., produced by compounding from 70-98% by weight of a transparent, amorphous, rigid and/or brittle polyamide A with a glass transition point of at least 180°
C. containing not more than 25 mol % of a lactam or a ω
-aminocarbonic acid with a carbon number of 6-12, at least 35 mol % of a cycloaliphatic diamine, and dicarbonic acids except terephthalic acid and 2-30% by weight of a transparent, amorphous, impact resistant polyamide B with a glass transition point below 90°
C., containing 50-80 mol % of at least one lone-chain lactam or ω
-aminocarbonic acid or diamine/dicarbonic acid pair with more than 10 carbon atoms, and a diamine of C6 carbon atoms and at least 10 mole % terephthalic acid, wherein the polyamide B contains 4,4′
diaminedicyclohexylmethanes, 4,4′
diamino-dicyclohexyl -2,2′
-propanes and their mixtures. - View Dependent Claims (5, 6)
- 120°
Specification