Molding composition based on polyetheramides
View Patent ↗A composition suitable for molding is provided having the following components: I. from 97 to 80 parts by weight of a polyetheramide, having units based on one or more linear aliphatic diamines having from 6 to 14 carbon atoms, one or more linear aliphatic or aromatic dicarboxylic acids having from 6 to 14 carbon atoms, and one or more polyetherdiamines having at least 3 carbon atoms per ether oxygen and having primary amino groups at the chain ends, II. from 3 to 20 parts by weight of a rubber containing one or more functional groups; and where the total of the parts by weight of I and II is 100; and moldings produced therefrom.
1. A composition comprising the following components:
I. from 97 to 80 parts by weight of a polyetheramide, comprising units based on one or more linear aliphatic diamines having from 6 to 14 carbon atoms, one or more linear aliphatic or aromatic dicarboxylic acids having from 6 to 14 carbon atoms, and one or more polyetherdiamines having at least 3 carbon atoms per ether oxygen and having primary amino groups at the chain ends, wherein said polyetheramide is obtained by reacting components of a composition comprising one or more of said linear aliphatic diamines, one or more of said linear aliphatic or aromatic dicarboxylic acids, and one or more of said polyetherdiamines,
II. from 3 to 20 parts by weight of a rubber selected from the group consisting of ethylene-α-olefin copolymers containing anhydride groups, styrene-ethylene/butylene block copolymers containing anhydride groups, ethylene-glycidyl (meth)acrylate copolymers, ethylene-(meth)acrylate-glycidyl (meth)acrylate terpolymers, ethylene-(meth) acrylate-α,β-unsaturated carboxylic anhydride terpolymers, and combinations thereof; and
wherein the total of the parts by weight of I and II is 100.
2. The composition of claim 1 , wherein component I is present in an amount from 95 to 85 parts by weight, and component II is present in an amount from 5 to 15 parts by weight.
3. A molding produced by the composition of claim 1 .
4. The molding of claim 3 , which comprises a member selected from a single pipe, a multilayer pipe, or a hollow tube.
5. The composition of claim 1 , wherein the polyetheramide of component I has a crystallite melting point, T m , of at least 160° C.
6. The composition of claim 5 , wherein the crystallite melting point, T m , is at least 175° C.
7. The composition of claim 1 , wherein the relative solution viscosity, η rel , of the polyetheramide is at least 1.80.
8. The composition of claim 7 , wherein the relative solution viscosity, η rel , of the polyetheramide is at least 1.85.
9. The composition of claim 1 , wherein the zero-shear viscosity of the polyetheramide at 220° C. is at least 500 Pas.
10. The composition of claim 9 , wherein the zero-shear viscosity of the polyetheramide at 220° C. is at least 800 Pas.
11. The composition of claim 1 , wherein the polyetherdiamine used to prepare the polyetheramide has a number-average molecular weight of from 230 to 4,000.
12. The composition of claim 1 , wherein the fraction of the polyetheramide which derives from the polyetherdiamine is from 5 to 50% by weight.
13. The composition of claim 1 , wherein the zero-shear viscosity at 220° C. is at least 2,000 Pas.
14. The composition of claim 13 , wherein the zero-shear viscosity at 220° C. is at least 5,000 Pas.
15. The composition of claim 1 , further comprising at most 50% by weight of one or more other polymers, based on the weight of the composition.
16. A molding produced by the composition of claim 15 .
17. The molding of claim 16 , which comprises a member selected from a single pipe, a multilayered pipe, or a hollow article.
18. The composition of claim 1 , further comprising at most 10% by weight of one or more conventional additives, based on the weight of the composition.
19. A molding produced by the composition of claim 18 .
20. The molding of claim 19 , which comprises a member selected from a single-layer pipe, a multilayer pipe, or a hollow article.
21. A molding produced from the composition of claim 1 .
22. The molding of claim 21 , produced by extrusion, coextrusion, blow molding, 3D blow molding, coextrusion blow molding, coextrusion 3D blow molding, coextrusion suction blow molding, or injection molding.
23. The molding of claim 21 , which comprises a member selected from a single-layer pipe, a multilayer pipe, or a hollow article.
24. The molding of claim 21 , which comprises a member selected from a subatmospheric-pressure line, an air line, a compressed air line, a control line, a coolant line, a fuel line, a ventilation line, a windshield-wash-system line, a line for hydraulic coupling systems, a servo control line, a line for air-conditioning systems of motor vehicles, a cable sheath, a wire sheath, a line for a mechanical or chemical engineering sector, a line used in medical devices, an injection-molded part of an oil filter or an injection-molded part of a fuel filter.
25. A method of preparing an article comprising extrusion molding the composition of claim 1 .
26. A method of preparing an article comprising blow molding the composition of claim 1 .