Preparation method of heat-resistant high-strength agricultural machinery adhesive

A high-strength, agricultural machinery adhesive technology, applied in the direction of adhesives, polymer adhesive additives, adhesive types, etc., can solve the impact resistance of adhesive joints, low bending and peel strength, poor aging resistance of agricultural machinery adhesives, Solving problems such as low temperature resistance of bonding, achieving the effect of low curing temperature, good processing technology, and reduced price

Inactive Publication Date: 2021-02-12
安徽宏翔农业机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current bonding technology and adhesives are still in development, and some properties of synthetic adhesives are far from meeting the actual needs. There are still some shortcomings and problems in the bonding technology, and the general tolerance temperature of bonding is not high.
Structural adhesives can only be used for a long time below 150°C, and the general application of adhesives is even lower. The impact resistance, bending resistance, and peeling strength of adhesive joints are generally low. Therefore, it is often necessary to adopt reasonable adhesive joint design and stress Large parts are supplemented by mechanical reinforcement. Some agricultural machinery adhesives have poor aging resistance, which affects long-term use. Although some adhesives have excellent performance, the bonding process is complicated, requiring special surface treatment, and inconvenient to use. Those skilled in the art urgently need to develop a A preparation method of heat-resistant high-strength agricultural machinery adhesive to meet the performance requirements and use requirements of a wide range of agricultural machinery repair processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017](1) Add 105 parts of 4,4'-diaminodiphenyl ether and trimellitic anhydride to the reaction kettle in parts by weight, wherein the molar ratio of 4,4'-diaminodiphenyl ether: trimellitic anhydride is 3: 2. After raising the temperature to 120°C and starting to stir for 6 hours, continue to add 93 parts of a mixture of diethylene glycol, neopentyl glycol and phthalic anhydride with a molar ratio of 2.5:2:1.5 and Atlac590 phenolic vinyl 145 parts of ester resin and control the temperature to 180°C under the condition of 20°C / hour heating rate and continuously test the acid value. When the acid value is lower than 25mgKOH / g, stop the reaction and vacuum for 30min, then add the weight of phenolic vinyl ester resin Continue stirring with 25% active diluent, lower the temperature to below 50°C, add 0.1% polymerization inhibitor p-tert-butylcatechol to obtain modified vinyl ester resin according to the weight of phenolic vinyl ester resin; (2) parts by weight Counting, 91 parts of...

Embodiment 2

[0019] (1) Add 100 parts of 4,4'-diaminodiphenyl ether and trimellitic anhydride to the reactor in parts by weight, wherein the molar ratio of 4,4'-diaminodiphenyl ether: trimellitic anhydride is 2: 2. After heating up to 120°C and starting to stir and react for 6 hours, continue to add 88 parts of a mixture of diethylene glycol, neopentyl glycol and phthalic anhydride with a molar ratio of 1:2:1.5 and phenolic vinyl ester 145 parts of resin and control the temperature to 180°C under the condition of 15°C / hour heating rate and constantly test the acid value. When the acid value is lower than 25mgKOH / g, stop the reaction and vacuum for 20min, then add phenolic vinyl ester resin by weight Continue stirring with 25% active diluent, lower the temperature to below 50°C, add 0.05% polymerization inhibitor p-methoxyphenol to the weight of Ripoxy630 phenolic vinyl ester resin to obtain modified vinyl ester resin; (2) parts by weight In total, 88 parts of trishydroxyethyl isocyanurate,...

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PUM

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Abstract

The invention relates to the technical field of adhesives, in particular to a preparation method of a heat-resistant high-strength agricultural machine adhesive, which is wide in raw material source,simple and convenient in preparation method and excellent in thermal performance, and utilizes modified polyesterimide and modified vinyl ester resin to blend, blend and crosslink. The insulating paint can be stored, has low curing temperature, can be used in occasions with high insulation grade such as agricultural machinery repair and maintenance, has good effect in repairing parts with abradedsurfaces, can replace the commonly used electric welding, electroplating and bushing processes to recover the original geometrical shapes and dimensions of the parts, and has the advantages of simpleprocess, low cost, high efficiency and the like. During repairing of agricultural machinery and tools, the repairing agent has the excellent characteristics of convenience in use, wide raw material source, heat resistance, impact resistance and high corrosion resistance, and is suitable for being applied in the range of agricultural machinery.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a preparation method of heat-resistant high-strength agricultural machinery adhesive. Background technique [0002] In the repair process of many agricultural machinery, agricultural machinery glue will be used, and it can be selected and used according to the needs of agricultural machinery adhesive repair, which reduces the cost of agricultural machinery repair, reduces the burden of poor and lower-middle peasants, and is conducive to strengthening the industrial-peasant alliance and speeding up the pace of agricultural mechanization , the existing agricultural machinery glue uses epoxy resin as the adhesive material, and other compositions and ratios are basically the same. Partial repairs of agricultural machinery can also be guaranteed when welding conditions are not available. However, the current bonding technology and adhesives are still in development, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J187/00C09J163/10C09J161/10C09J153/02C09J11/08C08G81/02
CPCC08G81/027C08L2201/08C08L2205/035C09J11/08C09J163/10C09J187/005C08L63/10C08L53/025C08L61/06C08L87/005
Inventor 刘超刘元正
Owner 安徽宏翔农业机械有限公司
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