Transparent polyamide moulding compound
AssigneeEms-Patent AG
InventorsFriedrich Severin Bühler, Christian Rytka, Walter Alois Tobisch, Sepp Bass
Life of this patent
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Abstract
The invention relates to polyamide molding compounds with improved scratch resistance, which are constructed from (A1) 50 to 99.99 parts by weight of a copolyamide, (A2) 0 to 49.99 parts by weight of a transparent polyamide, (A3) 0 to 29.99 parts by weight of an aliphatic polyamide, (B) 0.01 to 5 parts by weight of at least one lubricant, and (C) 0 to 3 parts by weight of further additives, with the proviso that the sum of (A1) and (A2) and (A3) and (B) produces 100 parts by weight.
Claims18
A molded article produced from a transparent polyamide molding compound, which article is highly transparent and scratch resistant without surface coating, wherein the transparent polyamide molding compound, containing at least one copolyamide and one lubricant, contains
- (A1) 50 to 99.99 parts by weight of a copolyamide, constructed from:
- a) 35%-40% by mol bis-(4-amino-3-methyl-cyclohexyl)methane (MACM),
- b) 18%-22% by mol isophthalic acid (IPS), and 16%-20% by mol by terephthalic acid (TPS), and
- c) 22%-27% by mol laurinlactam (LC 12), and
- (A2) 0 to 49.99 parts by weight of a transparent polyamide based on MACM and/or PACM and dicarboxylic acids with at least 9 C-atoms, and
- (A3) 0 to 29.99 parts by weight of an aliphatic polyamide based on monomers selected from the group consisting of diamines with at least 8 C-atoms, dicarboxylic acids with at least 10-C atoms, lactams with at least 10 C-atoms and amino carboxylic acids with at least 10 C-atoms,
- the sum of (A2) and (A3) being at most 49.99 parts by weight, and
- (B) 0.01 to 5 parts by weight of isotridecylstearate, and
- (C) 0 to 3 parts by weight of further additives,
- with the proviso that the sum of (A1) and (A2) and (A3) and (B) produces 100 parts by weight, and
- wherein (B) has been added via a master batch.
A molded article produced from a transparent polyamide molding compound which article is highly transparent and scratch resistant without surface coating, which, when tested in the form of a sheet with a thickness of 2 mm, has a transmission >90%, wherein the transparent polyamide molding compound, containing at least one copolymide and one lubricant, contains
- (A1) 50 to 99.99 parts by weight of a copolyamide, constructed from:
- a) 35%-40% by mol bis-(4-amino-3-methyl-cyclohexyl)methane (MACM),
- b) 18%-22% by mol isophthalic acid (IPS), and 16%-20% by mol by terephthalic acid (TPS), and
- c) 22%-27% by mol laurinlactam (LC 12), and
- (A2) 0 to 49.99 parts by weight of a transparent polyamide based on MACM and/or PACM and dicarboxylic acids with at least 9 C-atoms, and
- (A3) 0 to 29.99 parts by weight of an aliphatic polyamide based on monomers selected from the group consisting of diamines with at least 8 C-atoms, dicarboxylic acids with at least 10-C atoms, lactams with at least 10 C-atoms and amino carboxylic acids with at least 10 C-atoms, the sum of (A2) and (A3) being at most 49.99 parts by weight, and
- (B) 0.01 to 5 parts by weight of isotridecylstearate, and
- (C) 0 to 3 parts by weight of further additives,
- with the proviso that the sum of (A1) and (A2) and (A3) and (B) produces 100 parts by weight, and
- wherein (B) has been added via a master batch.
A molded article produced from a transparent polyamide molding compound, which article is highly transparent and scratch resistant without surface coating, wherein the transparent polyamide molding compound, containing at least one copolyamide and one lubricant, contains
- (A1) 50 to 99.99 parts by weight of a copolyamide, constructed from:
- a) 35%-40% by mol bis-(4-amino-3-methyl-cyclohexy)methane (MACM),
- b) 18%-22% by mol isophthalic acid (IPS), and 16%-20% by mol by terephthalic acid (TPS), and
- c) 22% to 27% by mol laurinlactam (LC 12), and
- (A2) 0 to 49.99 parts by weight of a transparent polyamide based on MACM and/or PACM and dicarboxylic acids with at least 9 C-atoms, and
- (A3) 0 to 29.99 parts by weight of an aliphatic polyamide based on monomers selected from the group consisting of diamines with at least 8 C-atoms, dicarboxylic acids with at least 10-C atoms, lactams with at least 10 C-atoms and amino carboxylic acids with at least 10 C-atoms,
- the sum of (A2) and (A3) being at most 49.99 parts by weight, and
- (B) 0.01 to 5 parts by weight of isotridecylstearate, and
- (C) 0 to 3 parts by weight of further additives,
- with the provisos
- that the sum of (A1) and (A2) and (A3) and (B) produces 100 parts by weight, and that the transparent polyamide molding compound does not contain any further lubricants, and
- wherein (B) has been added via a master batch.
Dependencies are inferred from the claim text.