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Production process of polyether amide elastomer

A polyetheramide and production process technology, used in the production and preparation of elastomer materials, can solve the problems of inconsistent product viscosity, uneven film formation, poor fluidity, etc., and achieve improved compatibility, good color, and shortened reaction time. Effect

Active Publication Date: 2022-03-08
WUXI YINDA NYLON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, polyetheramide elastomers have high viscosity and poor fluidity, and are prone to uneven film formation, which eventually leads to inconsistent viscosity of the product

Method used

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  • Production process of polyether amide elastomer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A kind of production technology of polyether amide elastomer, comprises the steps:

[0078] Step S1, mixing: the low molecular weight polyamide PA610 (molecular weight: about 1000) with a flow rate of 100Kg / hr and polytetrahydrofuran glycol (molecular weight: 600) with a flow rate of 60Kg / hr are continuously fed into the mixer for mixing. The mixer is heated by heat conduction oil to maintain the temperature of the material at 200°C; the mixer is fed with nitrogen to maintain a slight positive pressure; when the liquid level of the mixer reaches a certain value, the stirring is started, and after 10 minutes, the delivery pump of the mixer is started for feeding. Adjust the delivery rate of the mixer delivery pump to maintain a stable liquid level. By maintaining a certain liquid level, the residence time of the material in the mixer is 10 minutes.

[0079] Step S2, pre-polymerization: when the materials in the mixer are continuously sent into the pre-polymerization tank...

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Abstract

The invention provides a production process of a polyether amide elastomer, which comprises the following steps: adding low molecular weight polyamide and polyether into a mixer for mixing to obtain a mixed material; adding the mixed material and a catalyst into a pre-polymerization kettle for reaction to obtain a polyether amide prepolymer; the polyether amide prepolymer enters a polymerizer through an extrusion plate to react, and a polyether amide polymer material strip is obtained; and the polyether amide polymer material strips fall into the lower part of the polymerizer, are conveyed by the screw rod, are extruded into strips through the die head, and are cooled and diced to obtain polyether amide elastomer slices. According to the invention, the materials are mixed and primarily polymerized by adopting the high-speed stirring blades, and are polymerized after a prepolymer with a certain molecular weight is obtained, so that the problem of low reaction speed caused by incompatibility of low-molecular polyamide and polyether is prevented. And the prepolymer is extruded into fine strips in the polymerizer, so that the gas-liquid contact area is increased, the reaction speed is increased, the reaction time is shortened, and the polymer is good in color and stable in viscosity.

Description

technical field [0001] The invention belongs to the field of production and preparation of elastomer materials, in particular to a production process of polyetheramide elastomer. Background technique [0002] Polyetheramide thermoplastic elastomer is a block copolymer composed of high melting point crystalline polyamide hard segment and non-crystalline or amorphous polyether soft segment. Their chemical composition, fragment length and ratio between them determine the physical and chemical properties of this class of materials. Polyetheramide elastomer has high strength, good toughness, high elasticity, low specific gravity, good bending fatigue resistance, excellent wear resistance and low temperature performance, etc., and can be widely used in automobiles, sporting goods, medical supplies, seals, mechanical parts parts etc. [0003] The production process of polyetheramide elastomer is divided into batch type and continuous type. [0004] Patent CN105566639 discloses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00
CPCC08G81/00
Inventor 沈俊毅陈尚标胡瑞莉殷炼伟
Owner WUXI YINDA NYLON
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