Moulding compositions comprised of semirigid, fatty acid copolyamides, elastomers and optionally conventional polyamides
First Claim
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1. A polyamide-based molding composition having high flexibility and resilience even at low temperatures, comprising:
- (1) a semirigid copolyamide prepared from (a) a fatty acid dimer, hexamethylenediamine and caprolactam or (b) a fatty acid dimer, adipic acid and hexamethylenediamine wherein the dimeric acids are prepared by polymerization of mixtures comprising a major proportion of monomeric fatty acids having from 16 to 20 carbon atoms and a minor proportion of monomeric fatty acids having from 8 to 15 carbon atoms, 21 to 24 carbon atoms or a combination thereof;
(2) at least one elastomer comprising recurring units compatible with or reactive with the copolyamide (1) and selected from among;
(a) olefinic copolymers consisting essentially of an aliphatic α
-olefin containing from 2 to 6 carbon atoms and at least one α
,β
-unsaturated monocarboxylic or dicarboxylic acid comonomer containing from 3 to 8 carbon atoms, a lower alkyl ester thereof, or an anhydride thereof;
(b) olefinic copolymers consisting essentially of a conomoner containing carboxyl groups, a comonomer containing carboxylate groups or a combination thereof, ethylene and at least one α
-olefin having from 3 to 6 carbon atoms;
(c) olefinic copolymer consisting essentially of a comonomer containing carboxyl groups, a comonomer containing carboxylate groups or a combination thereof, ethylene, at least one α
-olefin having from 3 to 6 carbon atoms and at least one non-conjugated aliphatic diene containing at least 5 carbon atoms;
(d) copolyester-amides comprising (i) an acid compound containing 1 to 100 mole % of a diacid or derivative thereof having from 15 to 60 carbon atoms and 0 to 99 mole % of at least one other difunctional comonomer selected from among diacids, aminoacids, hydroxyacids or other ester- or amide-forming derivatives thereof, such comonomers having a number of carbon atoms at most equal to 12, (ii) a dihydroxylic compound which can be a linear, branched or cyclic diol having from 2 to 8 carbon atoms, a macromolecular dihydroxlic compound having a molecular weight ranging from 500 to 5,000 or a combination thereof, and (iii) an amine compound comprising at least one diamine, at least one aminoalcohol having a number of carbon atoms at most equal to 25 or a combination thereof, with the proviso that the compound (iii) may be omitted where the acid compound (i) already comprises an amino function;
(e) polyurethane comprising (i) an aliphatic polyester, an aliphatic polyether having a terminal hydroxyl group and having a molecular weight ranging from 500 to 4,000 or a combination thereof, (ii) an aliphatic diol containing 2 to 8 carbon atoms and (iii) an aromatic diisocyanate;
(f) organopolysiloxane and polyurethane block copolymers comprising a reaction product of (i) and (ii) which are different and where (i) is a polysiloxane macrodiol or polysiloxane macrodiisocyante which comprises a reaction product of an α
, ω
-hydrogenopolysiloxane of the formula;
##STR3## in which n is a number ranging from 10 to 80 and the substituents R, which may be identical or different, represent methyl, vinyl or phenyl groups, with a primary ethylenically unsaturated monoalcohol or ethylenically unsaturated monoisocyanate and (ii) is a low molecular weight diol and a low molecular weight diisocyanate;
(g) copolymers of unsaturated monomers, having at least one elastomeric phase and comprising particulates of a size ranging from 0.05 to 1.5 μ
m prepared by emulsion polymerization of an alkyl acrylate, an alkyl methacrylate or a conjugated aliphatic diene, and at least one unsaturated comonomer which bears a carboxylic acid group or derivative thereof, amine group or derivative thereof, nitrile group, sulfonic acid group or derivative thereof; and
(3) a conventional polyamide in an amount ranging from 10 to 50% by weight of the combination of the semirigid copolyamide (1) and the conventional polyamide (3).
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Abstract
Polyamide-based molding compositions having enhanced flexibility and resilience, especially at low temperatures, are prepared from (1) semirigid copolyamides prepared from fatty acid dimers, (2) elastomers containing moieties compatible or reactive with such copolyamides (1) and comprising olefinic copolymers bearing carboxyl and/or carboxylate groups, copolyester-amides, polyurethanes, organopolysiloxane and polyurethane block copolymers, and copolymers produced from a latex which comprises suitable functional groups, and, optionally, (3) conventional polyamides.
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Citations
13 Claims
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1. A polyamide-based molding composition having high flexibility and resilience even at low temperatures, comprising:
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(1) a semirigid copolyamide prepared from (a) a fatty acid dimer, hexamethylenediamine and caprolactam or (b) a fatty acid dimer, adipic acid and hexamethylenediamine wherein the dimeric acids are prepared by polymerization of mixtures comprising a major proportion of monomeric fatty acids having from 16 to 20 carbon atoms and a minor proportion of monomeric fatty acids having from 8 to 15 carbon atoms, 21 to 24 carbon atoms or a combination thereof; (2) at least one elastomer comprising recurring units compatible with or reactive with the copolyamide (1) and selected from among; (a) olefinic copolymers consisting essentially of an aliphatic α
-olefin containing from 2 to 6 carbon atoms and at least one α
,β
-unsaturated monocarboxylic or dicarboxylic acid comonomer containing from 3 to 8 carbon atoms, a lower alkyl ester thereof, or an anhydride thereof;(b) olefinic copolymers consisting essentially of a conomoner containing carboxyl groups, a comonomer containing carboxylate groups or a combination thereof, ethylene and at least one α
-olefin having from 3 to 6 carbon atoms;(c) olefinic copolymer consisting essentially of a comonomer containing carboxyl groups, a comonomer containing carboxylate groups or a combination thereof, ethylene, at least one α
-olefin having from 3 to 6 carbon atoms and at least one non-conjugated aliphatic diene containing at least 5 carbon atoms;(d) copolyester-amides comprising (i) an acid compound containing 1 to 100 mole % of a diacid or derivative thereof having from 15 to 60 carbon atoms and 0 to 99 mole % of at least one other difunctional comonomer selected from among diacids, aminoacids, hydroxyacids or other ester- or amide-forming derivatives thereof, such comonomers having a number of carbon atoms at most equal to 12, (ii) a dihydroxylic compound which can be a linear, branched or cyclic diol having from 2 to 8 carbon atoms, a macromolecular dihydroxlic compound having a molecular weight ranging from 500 to 5,000 or a combination thereof, and (iii) an amine compound comprising at least one diamine, at least one aminoalcohol having a number of carbon atoms at most equal to 25 or a combination thereof, with the proviso that the compound (iii) may be omitted where the acid compound (i) already comprises an amino function; (e) polyurethane comprising (i) an aliphatic polyester, an aliphatic polyether having a terminal hydroxyl group and having a molecular weight ranging from 500 to 4,000 or a combination thereof, (ii) an aliphatic diol containing 2 to 8 carbon atoms and (iii) an aromatic diisocyanate; (f) organopolysiloxane and polyurethane block copolymers comprising a reaction product of (i) and (ii) which are different and where (i) is a polysiloxane macrodiol or polysiloxane macrodiisocyante which comprises a reaction product of an α
, ω
-hydrogenopolysiloxane of the formula;
##STR3## in which n is a number ranging from 10 to 80 and the substituents R, which may be identical or different, represent methyl, vinyl or phenyl groups, with a primary ethylenically unsaturated monoalcohol or ethylenically unsaturated monoisocyanate and (ii) is a low molecular weight diol and a low molecular weight diisocyanate;(g) copolymers of unsaturated monomers, having at least one elastomeric phase and comprising particulates of a size ranging from 0.05 to 1.5 μ
m prepared by emulsion polymerization of an alkyl acrylate, an alkyl methacrylate or a conjugated aliphatic diene, and at least one unsaturated comonomer which bears a carboxylic acid group or derivative thereof, amine group or derivative thereof, nitrile group, sulfonic acid group or derivative thereof; and(3) a conventional polyamide in an amount ranging from 10 to 50% by weight of the combination of the semirigid copolyamide (1) and the conventional polyamide (3). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification