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Low shrinkage uv glue, preparation method and application

A low-shrinkage, acrylate technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problem of grain voids, stress and volume defects that are difficult to eliminate and affect the bonding size of products Accuracy and other issues

Active Publication Date: 2021-09-14
深圳市安伯斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing reaction of free radical UV curing resin is faster, but at the same time, because of the rapid crosslinking, the volume shrinkage rate will affect the dimensional accuracy during the deep curing process.
During the photocuring process of the free radical-cation hybrid system, because the photocuring speed of the free radical part is much faster than the photocuring speed of the cationic part, the free radical part is crosslinked first, which will hinder the reactive group of the cationic part of the cured monomer, which will easily lead to a low degree of crosslinking. , the undesirable result of poor mechanical properties
[0005] Since two interfaces are involved in the bonding of adhesives, for UV adhesives, the stress and volume defects caused by shrinkage during the curing process are more difficult to eliminate. Volume shrinkage not only affects the dimensional accuracy of product bonding, but also It directly leads to the decrease of cohesive force. For the bonding of rigid materials, it is easy to produce striated voids or even cracks. For the bonding of flexible materials, it is easy to warp and deform.

Method used

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  • Low shrinkage uv glue, preparation method and application
  • Low shrinkage uv glue, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A low-shrinkage UV glue, according to parts by mass, includes the following components:

[0031] Acrylate: 80 parts of cationic / free radical hybrid epoxy acrylic resin, 20 parts of alicyclic polyurethane acrylic resin;

[0032] Reactive monomer: a total of 20 parts of dimethyl acrylamide and lauryl acrylate;

[0033] UV curing auxiliary resin: 5 parts of mercapto-modified polymer;

[0034] Initiator: 1-hydroxycyclohexyl phenyl ketone and 2,4,6-trimethylbenzoyldiphenylphosphine oxide and 4-(phenylthio)phenyldiphenylsulfonium hexafluorophosphate 6 copies;

[0035] 3 parts of additives;

[0036] Filler: 5 parts of fumed silica;

[0037] Thixotropic agent 1.5 parts.

[0038] The preparation method of the low-shrinkage UV glue that present embodiment provides is as follows:

[0039] Add acrylate, reactive monomer, UV curing auxiliary resin, initiator, additive, filler, and thixotropic agent to the vacuum mixing equipment in sequence, and stir until all components are m...

Embodiment 2

[0041] A low-shrinkage UV glue, according to parts by mass, includes the following components:

[0042] Acrylate: 70 parts of cationic / free radical hybrid epoxy acrylate, 30 parts of polyether polyurethane acrylic resin;

[0043] Active monomer: 20 parts of lauryl alcohol methacrylate;

[0044] UV curing auxiliary resin: 5 parts of mercapto-modified polymer;

[0045] Initiator: 1-hydroxycyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 4-(phenylthio)phenyldiphenylsulfonium hexafluorophosphate 6 copies;

[0046] 3 parts of additives;

[0047] Filler: 5 parts of fumed silica;

[0048] Thixotropic agent 1.5 parts.

[0049] The preparation method is the same as in Example 1.

Embodiment 3

[0051] A low-shrinkage UV glue, according to parts by mass, includes the following components:

[0052] Acrylate: 80 parts of cationic / free radical hybrid epoxy acrylic resin, 20 parts of silicone modified acrylate;

[0053] Active monomer: isooctyl methacrylate, 25 parts of diluent for heterocyclic monomer complex;

[0054] UV curing auxiliary resin: 5 parts of mercapto-modified polymer;

[0055] Initiators: 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4,6-trimethylbenzoylphenyl phosphonate, 4-isobutylphenyl-4'-methylphenyliodohexafluoro Phosphate 5.5 parts;

[0056] 3 parts of additives;

[0057] Filler: 6 parts of fumed silica;

[0058] Thixotropic agent 1.5 parts.

[0059] The preparation method is the same as in Example 1.

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Abstract

The invention provides a UV glue with low shrinkage rate, which comprises the following components according to the parts: 50-100 parts of acrylate, 10-30 parts of active monomer, 2-10 parts of initiator, 1-10 parts of additive, and 5 parts of filler -15 parts, 1-5 parts of thixotropic agent; Wherein, the acrylate comprises cationic / free radical hybrid epoxy acrylic resin. The invention also provides a preparation method and application of the low-shrinkage UV glue. The UV glue of the present invention has ultra-low shrinkage.

Description

technical field [0001] The invention relates to a UV glue, in particular to a low-shrinkage UV glue, a preparation method and an application. Background technique [0002] In some specific scenes, it is necessary to use low-shrinkage adhesives. For example, when the focal length of the lens is fixed, the gap between the lens and the motor needs to be filled with glue. at 0.5%. [0003] Existing UV adhesives are based on a single cationic UV-curable resin or a free-radical UV-curable resin, and there are also free-radical-cation hybrid systems. [0004] In UV curing, cationic UV curable resin can obtain relatively low shrinkage rate, but its curing speed is relatively slow, and it needs a long time of light or post-curing method to achieve its deep curing, and the product molding time is longer. The curing reaction of free radical UV curing resin is faster, but at the same time, because of the rapid crosslinking, the volume shrinkage rate is large during the deep curing pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/10C09J175/14C09J11/08C09J11/04
CPCC08L2205/03C09J11/04C09J11/08C09J163/10C08L75/14C08L101/02C08K3/36
Inventor 田志林
Owner 深圳市安伯斯科技有限公司