Molding composition based on polyetheramides

一种模制组合物、聚醚酰胺的技术，应用在管状物品、应用、家里用具等方向，能够解决不适于生产、达不到稳定性等问题

Active Publication Date: 2005-02-09
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these disadvantages can be avoided by using molding compositions based on higher melting polyetheresteramides, as described in EP-A-0095893, polyamide elastomers of this type are not suitable for the production of Pipes, because the corresponding molding composition meets the required hydrolysis resistance for a certain purpose of use, which is far from the stability of conventional polyamide molding compositions and fails after a few weeks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Preparation of polyetheramide:

[0049] A 200 L agitated autoclave was loaded with the following starting reaction materials:

[0050] 26.11kg 75% 1,6-hexanediamine aqueous solution,

[0051] 52.94kg of 1.12-dodecanedioic acid,

[0052] 25.55kg of JEFFAMIN  D400 and

[0053] 100g of 50% aqueous solution of hypophosphorous acid.

[0054] The starting materials were melted under a nitrogen atmosphere and heated and stirred in a sealed autoclave to about 220° C. while adjusting the internal pressure to about 20 bar. This pressure was maintained for 2 hours, after which the melt was reheated to 230°C with continuous depressurization to atmospheric pressure, and this temperature was maintained for 1.5 hours under nitrogen flow. The vessel was then evacuated to 28 mbar over a period of 3 hours and maintained at this pressure for a further 3 hours until torque indicated that the viscosity of the melt had ceased to rise. Then use the gear pump to release the melt and gr...

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PUM

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Abstract

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.

Description

technical field [0001] The present invention relates to polyetheramide molding compositions which have excellent thermoformability and hydrolysis resistance and are suitable for extrusion of hoses and production of flexible blow-molded articles. Background technique [0002] Plasticized partially crystalline polyamide molding compositions, especially those based on PA11 or PA12, have long been able to be produced by extrusion for automotive applications due to their excellent mechanical stability and chemical resistance. Manufactured pipe fittings. Now, however, these molding compositions harden after a short period of use due to the volatility of the external plasticizers, where under-hood operating temperatures are required to be higher and higher. In addition, at present, when the service temperature is required to be increased to 110 to 150°C, they have a tendency to deform irreversibly if faced with a certain pressure. Although these disadvantages can be avoided by us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06B29C45/00B29C48/00B29C48/09B29C49/04C08L23/08C08L33/14C08L53/00C08L77/12C08L79/00
CPCC08L53/00C08L77/06B29C47/00C08L33/14Y10T428/1352C08L23/08B29C47/0023C08L77/12C08L77/00B29C49/04B29C48/00B29C48/09C08L2666/24C08L2666/06C08L2666/02C08L79/00
Inventor F·-E·鲍曼W·巴茨M·希梅尔曼O·法格斯
Owner EVONIK OPERATIONS GMBH
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