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Polyester for adhesive with adjustable viscosity and preparation method thereof

An adhesive, polyester technology, applied in the direction of adhesive, adhesive type, graft polymer adhesive, etc., to achieve the effect of good adhesion strength

Active Publication Date: 2017-07-07
中瀚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, US2005 / 0159521 achieves reversible bonding by irradiating with light radiation to free radical crosslinking, and then destroying it with ultrasonic waves, but after a process is completed, it cannot continue to be reversible.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] A), preparation of polyester matrix resin:

[0027] Put 1.66kg terephthalic acid, 3.32kg isophthalic acid, 7.31kg adipic acid, 2.32kg maleic acid, 6.08kg ethylene glycol, 4.96kg hexanediol and 4.4g isopropyl titanate into the reactor middle. The air was replaced with nitrogen, and the temperature was raised to 220-255°C with stirring to carry out the esterification reaction. When the by-product reaches the theoretical value, the temperature is raised to keep the reaction temperature between 250-280°C, the polymerization is reduced under reduced pressure, and the reaction is stopped when the end point is reached, the vacuum is filled with nitrogen, and the material is extruded to obtain the matrix resin.

[0028] B), grafting reaction:

[0029] The prepared matrix resin is dissolved in butanone to make a solution with a solid content of 50%, add 16g initiator azobisisobutyronitrile, 7.92kg methacrylic acid [6-(4-methoxyazophenyl -4'-oxy)hexyl] esters were mixed evenly...

example 2

[0031] A), preparation of polyester matrix resin:

[0032] Put 1.66kg of terephthalic acid, 3.32kg of isophthalic acid, 10.1kg of sebacic acid, 2.32kg of maleic acid, 6.08kg of ethylene glycol, 4.37kg of neopentyl glycol and 3.5g of antimony acetate into the reaction kettle. The air was replaced with nitrogen, and the temperature was raised to 220-255°C with stirring to carry out the esterification reaction. When the by-product reaches the theoretical value, the temperature is raised to keep the reaction temperature between 250-280°C, the polymerization is reduced under reduced pressure, and the reaction is stopped when the end point is reached, the vacuum is filled with nitrogen, and the material is extruded to obtain the matrix resin.

[0033] B), grafting reaction:

[0034] The prepared matrix resin is dissolved in toluene to make a solution with a solid content of 50%, add 16g initiator azobisisobutyronitrile, 9.53kg acrylic acid [6-(4-methoxyazophenyl-4' -Oxy)hexyl]este...

example 3

[0036] A), preparation of polyester matrix resin:

[0037] Put 4.15kg of isophthalic acid, 10.1kg of sebacic acid, 2.9kg of fumaric acid, 11.5kg of hexanediol, 4.37kg of neopentyl glycol and 3.5g of antimony acetate into the reaction kettle. The air was replaced with nitrogen, and the temperature was raised to 220-255°C with stirring to carry out the esterification reaction. When the by-product reaches the theoretical value, the temperature is raised to keep the reaction temperature between 250-280°C, the polymerization is reduced under reduced pressure, and the reaction is stopped when the end point is reached, the vacuum is filled with nitrogen, and the material is extruded to obtain the matrix resin.

[0038] B), grafting reaction:

[0039] The prepared matrix resin is dissolved in butanone to make a solution with a solid content of 50%, add 16g initiator azobisisobutyronitrile, 9.53kg acrylic acid [6-(4-methoxyazophenyl-4 '-Oxy)hexyl] ester mixed uniformly, and then heat...

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PUM

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Abstract

The invention provides polyester for an adhesive with adjustable viscosity and a preparation method thereof. The number-average molar mass of the polyester for the adhesive is 10000-50000, the acid value is 1-5mg KOH / g and the hydroxyl value is 10-50mg KOH / g. The preparation method thereof comprises the following steps: firstly, performing esterification reaction on the combination of saturated dicarboxylic acid and unsaturated dicarboxylic acid and dihydric alcohol, and then performing decompression polycondensation, thereby acquiring a matrix resin, and lastly, performing grafting reaction on the matrix resin, namely, performing grafting reaction on the acquired matrix resin and the monomer containing an azobenzene structure, thereby acquiring the polyester. According to the invention, the photoinduced heterogeneous characteristic of azobenzene is utilized, so that the adhesion strength of the end product is reduced, the separating effect of the compound layer is achieved and the repeated reversible adhesion is realized.

Description

technical field [0001] The invention belongs to the field of adhesive synthesis, and in particular relates to a polyester for adhesive with adjustable viscosity and a preparation method thereof. Background technique [0002] The reversible bonding of adhesives plays an important role in many fields, such as automobile industry, semiconductor electronics, construction, confidential machinery, etc. [0003] The current commonly used method is mainly to form a cross-linked structure through the chemical reaction of the adhesive components, and then destroy the cross-linked structure by other methods. For example, in US2005 / 0159521, an adhesive system that is irradiated with light radiation to achieve free radical crosslinking, and then destroyed by ultrasonic waves, realizes reversible bonding, but after a process is completed, the reversible implementation cannot be continued. There is also the formation of a thermally unstable chemical structure, such as a sterically hindere...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/36C08G63/52C08G63/85C08G63/86C09J151/08
CPCC08F283/01C08G63/52C08G63/85C08G63/866C09J151/08C08F220/36
Inventor 许峰黄志远温天军刘义王忠宣
Owner 中瀚新材料科技有限公司
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