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Hot-water moldable polyamide molding compositions

A molding composition, polyamide technology, applied in the field of polyamide molding composition, can solve the problems of not allowing polyamide to have complete crystallinity, mechanical properties and surface appearance cannot be obtained

Pending Publication Date: 2021-12-21
SOLVAY SPECIALTY POLYMERS USA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molding at lower temperatures will not allow the polyamide to have full crystallinity and therefore the expected mechanical properties as well as acceptable surface appearance cannot be obtained

Method used

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  • Hot-water moldable polyamide molding compositions
  • Hot-water moldable polyamide molding compositions
  • Hot-water moldable polyamide molding compositions

Examples

Experimental program
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preparation example Construction

[0161] Preparation of polyamide composition (C)

[0162] Also described herein is a process for the manufacture of composition (C) as detailed above, said process comprising melt blending polyamide (P1), polyamide (P2) and specific components such as fillers, Tougheners, stabilizers and any other optional additives.

[0163] In the context of the present invention, any melt blending method may be used to combine the polymeric and non-polymeric components. For example, the polymeric and non-polymeric ingredients can be fed to a melt mixer such as a single or twin screw extruder, a mixer, a single or twin screw kneader, or a Banbury mixer ), and this adding step can be to add all the ingredients at once or add step by step in batches. When the polymeric and non-polymeric ingredients are added stepwise in batches, these polymeric and / or non-polymeric ingredients are added first and are then melt-mixed with the remainder of the polymeric and non-polymeric ingredients added subs...

example

[0180] These examples demonstrate that the compositions of the invention have increased nucleation rates and can be molded at temperatures below 110°C, for example at 100°C or 90°C.

[0181] Polyamide

[0182] PA#1 (the present invention) : 6700, polyamide MXD6 / PXD6 50 / 50 from Mitsubishi Gas Chemical Company, Inc., CAS No. 25718-71-2-50 / 50 p-xylylenediamine and m-xylylenediamine+ A mixture of adipic acids (Tm = 277°C; Tc = 230°C).

[0183] PA#2 (comparison) : Comparative polyamide #2 was prepared according to the following method: adipic acid ((394 g from Invista), sodium acetate (0.4 g from Sigma-Aldrich) and sodium hypophosphite (0.7g, from Sigma Aldrich Company) is packed in the reactor of 6L.After purging with nitrogen, reactor is heated to 171 ℃.Met-xylylenediamine (368g, from Mitsubishi Gas Chemical Company) is gradually Add dropwise to the reactor. After the m-xylylenediamine is added, the reaction mixture is heated to 246°C and any water generated is released a...

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Abstract

The present invention relates to a polyamide molding composition (C), and particularly to a polyamide molding composition (C) that is injection moldable under low mold temperature conditions and low injection pressure conditions.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 844850, filed May 8, 2019, and European Patent Application No. 19198864.1, filed September 23, 2019, the entirety of each of these applications for all purposes The contents are incorporated herein by reference. technical field [0003] The present invention relates to a polyamide molding composition (C) and in particular to a polyamide molding composition (C) which is injection moldable under low molding temperature conditions. Background technique [0004] Compositions based on thermoplastic polyamides are raw materials that can be transformed by injection moulding. Due to their excellent mechanical strength, heat resistance, water resistance and chemical resistance, fiber-reinforced plastics produced from thermoplastic polyamide-based compositions are used in many different applications such as automotive, transportation, electrical and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06
CPCC08L77/06
Inventor P·勒菲弗G·P·德西奥
Owner SOLVAY SPECIALTY POLYMERS USA LLC
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