Quincunx-shaped elastic element and preparation method thereof

An elastic element and quincunx-shaped technology, which is applied in the field of material science, can solve the problems of low temperature brittleness and long-term heat resistance, long molding cycle of cast nylon elastomer, broken elastomer drum, etc., to achieve low production cost, The effect of widening application and adjustable performance

Active Publication Date: 2018-10-12
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing quincunx-shaped elastic element of the coupling is mainly composed of polyurethane rubber, and its transmission torque is small. In frequent alternating occasions, due to repeated compression and rebound, the interior is prone to heat generation and its life will be affected due to the accumulation of heat. , it is frequently replaced during use, and its service life is about 20 to 30 days, especially in low-speed, high-torque, and frequent alternating occasions, it is easy to cause the elastomer drum to break due to heat accumulation, causing accidents
However, the molding cycle of cast nylon elastomer is long, the impact resistance of the material is limited, and the shortcomings of low-temperature brittleness and long-term heat-resistant temperature also limit its popularization and application to a certain extent.

Method used

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  • Quincunx-shaped elastic element and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A quincunx-shaped elastic element of the present invention is prepared by reaction injection molding from 100 parts by weight of lactam, 6 parts by weight of catalyst and 20 parts by weight of block prepolymer.

[0026] In this embodiment, the lactam is specifically caprolactam, and the catalyst is specifically caprolactam magnesium bromide. The block prepolymer is prepared by polymerizing polytetramethylene glycol and toluene diisocyanate, wherein the ratio of the hydroxyl group contained in polytetramethylene glycol to the NCO group contained in toluene diisocyanate is 1:1. The number average molecular weight of the block prepolymer was 8,000.

[0027] A method for preparing the quincunx-shaped elastic element of the above-mentioned present embodiment, comprising the following steps:

[0028] (1) take caprolactam, caprolactam magnesium bromide and block prepolymer by above-mentioned parts by weight;

[0029] (2) Put 6 parts of catalyst and 50 parts of caprolactam in...

Embodiment 2

[0033] A quincunx-shaped elastic element of the present invention, the quincunx-shaped elastic element is injected by reaction by 100 parts by weight of lactam (90 parts of caprolactam and 10 parts of laurolactam), 8 parts by weight of catalyst and 30 parts by weight of block prepolymer The molding method is prepared.

[0034] In this example, the lactam is specifically a mixture of caprolactam and laurolactam, the catalyst is specifically sodium caprolactam, and the block prepolymer is prepared by polymerization of polyglycerol and triphenylmethane triisocyanate, wherein polyglycerol The ratio of the amount of the hydroxyl group contained in the alcohol to the NCO group contained in the triphenylmethane triisocyanate is 1:0.8. The number average molecular weight of this block prepolymer was 15,000.

[0035] A method for preparing the quincunx-shaped elastic element of the above-mentioned present embodiment, comprising the following steps:

[0036] (1) Take caprolactam, laur...

Embodiment 3

[0040] A quincunx-shaped elastic element of the present invention is prepared by reaction injection molding from 100 parts by weight of lactam, 10 parts by weight of catalyst and 35 parts by weight of block prepolymer.

[0041] In this example, the lactam is specifically caprolactam, the catalyst is specifically caprolactam magnesium bromide, and the block prepolymer is prepared by polymerization of pentaerythritol and isophthalyl caprolactam, wherein the hydroxyl group contained in pentaerythritol and isophthaloyl The ratio of the amount of imide group contained in formyl caprolactam to substance is 1:1.3. The number average molecular weight of the block prepolymer was 25,000.

[0042] A method for preparing the quincunx-shaped elastic element of the above-mentioned present embodiment, comprising the following steps:

[0043] (1) take caprolactam, caprolactam magnesium bromide and block prepolymer by above-mentioned parts by weight;

[0044] (2) Put 10 parts of catalyst and 5...

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Abstract

The present invention discloses a quincuncial elastic member and a preparation method thereof, wherein mainly 100 parts by weight of lactam, 0.1-15 parts by weight of a catalyst and 1-40 parts by weight of a block prepolymer are subjected to reaction injection molding to obtain the quincuncial elastic member. The preparation method comprises: (1) weighing raw materials; (2) adding a catalyst and one part of lactam into a first reaction kettle, adding the other part of the lactam and a block prepolymer into a second reaction kettle, heating to make the material be molten, and stabilizing; and (3) mixing the active materials obtained from the two reaction kettles through a reaction injection molding machine, and polymerizing in a mold to obtain the quincuncial elastic member. According to the present invention, the quincuncial elastic member has characteristics of excellent low-temperature toughness, good wear resistance, good impact resistance and long service life, and the preparation method has characteristics of simple process, short molding cycle, and low production cost.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a quincunx-shaped elastic element and a preparation method thereof, in particular to a reaction injection nylon quincunx-shaped elastic element and a preparation method thereof. Background technique [0002] At present, quincunx-shaped elastic elements are mainly divided into two categories: polyurethane elastic elements and cast nylon elastic elements. The existing quincunx-shaped elastic element of the coupling is mainly composed of polyurethane rubber, and its transmission torque is small. In frequent alternating occasions, due to repeated compression and rebound, the interior is prone to heat generation and its life will be affected due to the accumulation of heat. , It is frequently replaced during use, and its service life is about 20 to 30 days, especially in low-speed, high-torque, and frequent alternating occasions, it is easy to break the elastomer drum due to heat accumul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/14C08G69/18B29C45/76
Inventor 郑梯和刘爱学陈伟邓凯桓王绪轮徐金龙
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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