A kind of m-xylenediamine prepolymer and preparation method thereof

A m-xylylenediamine and prepolymer technology, applied in the direction of online phenolic epoxy resin adhesives, etc., can solve the problems of high cohesion, easy crystallization and poor adhesion of cured products, and increase the quality rate and improve Effects of chemical resistance and water resistance improvement

Active Publication Date: 2016-01-13
广西珀源新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure m-xylylenediamine is prone to crystallization and skinning when exposed to the air, and it is easy to crystallize and precipitate at low temperature in winter, and when it is directly used as an epoxy curing agent, the cured product has greater cohesion, poor adhesion, and shrinkage. Big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The m-xylene diamine prepolymer of the present invention comprises in parts by weight: 30 parts by weight of linear phenol formaldehyde epoxy resin, 40 parts by weight of m-xylene diamine, 15 parts by weight of glycidyl ester epoxy resin, 1 part by weight of 1,8-diazabicyclo(5,4,0)-undec-7ene and 1 part by weight of benzyldimethylamine.

[0021] The m-xylene diamine prepolymer is prepared by the following method:

[0022] a) First clean the reactor to ensure that there is no impurity that affects it. The reactor includes, for example, a heating device with heat-conducting oil, an automatic temperature control device, a cooling temperature control device, a speed-adjustable stirring device, a dripping device, and the like.

[0023] Then add m-xylene diamine such as 40 parts by weight at normal temperature such as temperature ≤ 45 ° C, and slowly add linear phenol formaldehyde epoxy resin such as 30 parts by weight and glycidol dropwise under the condition of stirring sp...

Embodiment 2

[0029] The m-xylene diamine prepolymer of the present invention comprises by weight: 35 parts by weight of linear phenol formaldehyde epoxy resin, 55 parts by weight of m-xylene diamine, 17 parts by weight of glycidyl ester epoxy resin, 1.8 parts by weight of 1,8-diazabicyclo(5,4,0)-undec-7ene and 1.2 parts by weight of benzyldimethylamine.

[0030] The m-xylene diamine prepolymer is prepared by the following method:

[0031] a) First clean the reactor to ensure that there is no impurity that affects it. The reactor includes, for example, a heating device with heat-conducting oil, an automatic temperature control device, a cooling temperature control device, a speed-adjustable stirring device, a dripping device, and the like.

[0032] Then add m-xylene diamine such as 55 parts by weight at normal temperature such as temperature ≤ 45 ° C, and slowly add linear phenol formaldehyde epoxy resin such as 35 parts by weight and glycidol dropwise under the condition of stirring speed...

Embodiment 3

[0038] The m-xylene diamine prepolymer of the present invention comprises in parts by weight: 50 parts by weight of linear phenol formaldehyde epoxy resin, 60 parts by weight of m-xylene diamine, 20 parts by weight of glycidyl ester epoxy resin, 5 parts by weight of accelerator and 5 parts by weight of auxiliary.

[0039] The m-xylene diamine prepolymer is prepared by the following method:

[0040] a) First clean the reactor to ensure that there is no impurity that affects it. The reactor includes, for example, a heating device with heat-conducting oil, an automatic temperature control device, a cooling temperature control device, a speed-adjustable stirring device, a dripping device, and the like.

[0041] Then add m-xylene diamine such as 60 parts by weight at normal temperature such as temperature ≤ 45 ° C, and slowly add linear phenol formaldehyde epoxy resin such as 50 parts by weight and glycidol dropwise under the condition of stirring speed such as 600r / min The ester...

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Abstract

The invention provides a prepolymer containing m-xylene diamine. The prepolymer comprises the following components in parts by weight: 30-50 parts of linear epoxy phenol formaldehyde, 40-60 parts of m-xylene diamine, 15-20 parts of glycidyl ester type epoxy resin, a promoter, and an assistant. The prepolymer can be cured quickly at a low temperature, cannot be crystallized easily, and has a moderate viscosity; the requirement on control over the proportion is not high; AB gum equivalent ratio is easy to adjust; no amine albinism phenomenon occurs during the curing process; the irritation on skin is small; the hardness and strength the gum are enhanced; the waterproof and chemical resistant properties are improved; the degumming speed is increased. The invention further provides a preparation method for the prepolymer containing the m-xylene diamine.

Description

technical field [0001] The present invention relates to a meta-xylene diamine prepolymer, more particularly to a meta-xylene diamine prepolymer which can improve the hardness and strength of an adhesive and a preparation method thereof. Background technique [0002] As an epoxy curing agent, m-xylene diamine has the advantages of high glass transition temperature Tg, good temperature resistance, good wear resistance and chemical resistance. However, pure m-xylenediamine has the advantages of being exposed to air, easy to crystallize and crust, and easy to crystallize at low temperature in winter, and when it is directly used as epoxy curing agent, the cured product has large cohesion, poor adhesion, and shrinkage. big. SUMMARY OF THE INVENTION [0003] In view of the above problems, the purpose of the present invention is to provide a kind of m-xylene diamine prepolymer, which can be quickly cured at low temperature, is not easy to crystallize, has moderate viscosity, doe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C09J163/04
Inventor 韦祖睦陈韬
Owner 广西珀源新材料有限公司
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