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Gradient-temperature-sensitive strong-bonding hot melt adhesive and preparation method thereof

A temperature-sensitive, hot-melt adhesive technology, applied in the direction of surface pretreatment bonding methods, adhesives, adhesive types, etc., can solve problems such as poor toughness and cohesion, and low bonding strength

Inactive Publication Date: 2020-01-03
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common small molecule hot melt adhesives such as epoxy, phenolic oligomers, etc., have the characteristics of gradient temperature sensitivity, but due to their poor toughness and cohesion, the bonding strength is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A gradient temperature-sensitive type strong bonding hot-melt adhesive, its formulation composition (parts by weight) is: adhesion promoter (20 parts), polycaprolactone (50 parts), KH560 (2 parts), KH792 (2 parts) parts), absolute ethanol (18 parts).

[0029] The polycaprolactone average molecular weight is 660g / mol

[0030] The preparation of described a kind of gradient temperature-sensitive strong bonding hot-melt adhesive comprises the following steps:

[0031] Step A: the synthesis of adhesion promoter, raw material components and content (weight) are as follows: main monomer: methyl methacrylate (30 parts), methyl acrylate (20 parts), butyl methacrylate (30 parts) parts) and butyl acrylate (15 parts);

[0032] Functional monomer: acrylic acid (5 parts);

[0033] Solvent: the ratio of toluene solution is 30%;

[0034] The synthesis method is a solvent-based polymerization method. The raw material and toluene are added into the reactor at a ratio of 1:0.7. After...

Embodiment 2

[0047] A gradient temperature-sensitive strong-adhesive hot-melt adhesive, the formula composition (parts by weight) is: adhesion promoter (25 parts), polycaprolactone (60 parts), KH560 (3 parts), KH792 (3 parts) parts), absolute ethanol (22 parts).

[0048] The polycaprolactone average molecular weight is 720g / mol

[0049] The preparation of described a kind of gradient temperature-sensitive strong bonding hot-melt adhesive comprises the following steps:

[0050] Step A: the synthesis of adhesion promoter, raw material components and content (weight) are as follows: main monomer: methyl methacrylate (30 parts), methyl acrylate (20 parts), butyl methacrylate (30 parts) parts) and butyl acrylate (15 parts);

[0051] Functional monomer: acrylic acid (6.5 parts);

[0052] Solvent: the ratio of toluene solution is 30%;

[0053] The synthesis method is a solvent-based polymerization method. The raw materials and toluene are added into the reactor at a ratio of 1:0.8. After the ...

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Abstract

The invention discloses a gradient-temperature-sensitive strong-bonding hot melt adhesive and a preparation method thereof, which comprises the following components in parts by mass: 20-25 parts of adhesion accelerator, 50-60 parts of fast crystallization adhesive, 2-3 parts of silane coupling agent A, 2-3 parts of silane coupling agent B and 18-22 parts of diluent; the adhesion accelerator is a special polyacrylate composite with a molecular weight of 15000-20000g / mol; The fast crystallization adhesive is polycaprolactone with an average molecular weight of 600-800g / mol; the silane coupling agent A is KH560; the silane coupling agent B is KH792; the diluent is anhydrous ethanol. According to the invention, by synthesizing the adhesion accelerator and selecting appropriate fast crystallization adhesive and coupling agent, the hot melt adhesive with strong adhesion and better gradient temperature sensitivity characteristics can be obtained through the preparation method of the invention.

Description

technical field [0001] The invention relates to the technical field of polymer special adhesive adhesives, in particular to a gradient temperature-sensitive strong adhesive hot melt adhesive and a preparation method thereof. Background technique [0002] Hot-melt adhesive is a kind of polymer adhesive that is bonded by heating, melting and coating, and cooling and solidifying. The hot melt adhesive has a solid content of 100%, has the characteristics of no pollution, fast curing speed, and reusable use. It has been widely used and developed in various fields of national production. In the field of precision parts processing such as electronic components, it is necessary to use special hot-melt adhesives as temporary adhesives for processing. The hot-melt adhesives are required to have gradient temperature sensitivity so that the components and tooling can be peeled off when heated. At the same time, hot-melt adhesives are required It has strong bonding ability at room tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/04C09J133/12C09J11/06C09J5/02C08F220/14C08F220/18C08F220/06
CPCC08F220/14C09J5/02C09J11/06C09J167/04C09J2400/163C09J2301/304C08L33/064C08K5/54
Inventor 蔡贾林张政邸鑫
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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