Patent EP-2290004-A2 (EP)
Inventor: HOFFMANN BOTHO
IPC: C08L77/02
Filed: 2010-06-04
Abstract: Polyamide blend molding compound, comprises a polyamide blend content and at least one impact-resistant component, preferably the polyamide blend content comprises the following polyamides: (a) 20 to 65% by weight of at least one semi-crystalline polyamide; (b) 8 to 25% by weight of at least one amorphous and/or microcrystalline polyamide; (c) 1 to 20% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit; (d) 10 to 40% by weight of a polyamide elastomer; and (e) 0 to 35% by weight of a non-polyamide elastomer. Polyamide blend molding compound, comprises a polyamide blend content and at least one impact-resistant component, preferably the polyamide blend content comprises the following polyamides: (a) 20 to 65% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion of more than 40 J/g and with an average of at least 8 C atoms per monomeric unit; (b) 8 to 25% by weight of at least one amorphous and/or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J/g; (c) 1 to 20% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit; and that the impact-resistant component comprises as follows: (d) 10 to 40% by weight of a polyamide elastomer which is composed of hard segments and soft segments, with the hard segments being based on lactams and/or amino-carboxylic acids; and (e) 0 to 35% by weight of a non-polyamide elastomer, with all details in weight percent relating to the total weight of the polyamide blend molding compound and result in 100% by weight, optionally supplemented by commercial additives that are also added; or polyamide blend molding compound comprises a polyamide blend content and at least one impact-resistant component, preferably the polyamide blend content comprises: (a) 50 to 85% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion of more than 40 J/g and with an average of at least 8 C atoms per monomeric unit; (b) 2 to 15% by weight of at least one amorphous and/or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J/g; (c) 2 to 15% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit; and that the impact-resistant component comprises as follows: (d) 1 to 20% by weight of a polyamide elastomer which is composed of hard segments and soft segments, with the hard segments being based on lactams and/or amino-carboxylic acids; and (e) 0 to 35% by weight of a non-polyamide elastomer, with all details in weight percent relating to the total weight of the polyamide blend molding compound and result in 100% by weight, optionally supplemented by commercial additives that are also added. Independent claims are: (1) a method for producing polyamide blend molding compound, where each polyamide of the components (a,b,c) of the polyamide blend content and the polyamide elastomer of the impact-resistant component (d) is produced in a classic polymerization autoclave at a total pressure which is 300 mbar or higher; and (2) molded part, made of polyamide blend molding compound, where molded part has a modulus of elasticity of not more than 1400 MPa at a temperature of -30[deg] C; molded part has a modulus of elasticity of not more than 2400 MPa, preferably not more than 2000 MPa, and especially preferably not more than 1950 MPa, at a temperature of -40[deg] C; or molded part has a modulus of elasticity of at least 50 MPa, preferably at least 75 MPa, and especially preferably at least 85 MPa, at a temperature of +180[deg] C.