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Special anti-warping adhesive for lithium battery, preparation method of special anti-warping adhesive and anti-warping lug adhesive tape

A lithium battery and adhesive technology, applied in the manufacture of electrolyte batteries, adhesives, adhesive additives, etc., can solve the problems of unwinding degumming, large unwinding force, etc., and achieve the effect of improving anti-warping performance

Active Publication Date: 2019-02-22
佛山市顺德区永创翔亿电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for this is that the tab tape is not subjected to release treatment, and it is easy to have a large unwinding force, resulting in unwinding and degumming.

Method used

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  • Special anti-warping adhesive for lithium battery, preparation method of special anti-warping adhesive and anti-warping lug adhesive tape
  • Special anti-warping adhesive for lithium battery, preparation method of special anti-warping adhesive and anti-warping lug adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, it is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. In step 1, an adhesive with excellent anti-warping performance for lithium batteries is synthesized, and 40 parts of isooctyl acrylate ( EHA), 10 parts of lauryl acrylate (LA), 4 parts of itaconic acid, 3 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA) , 2 parts of tetrahydrofuran acrylate (THFA), 0.02 parts of free radical initiator azobisisobutyronitrile (AIBN), 0.2 parts of copper chloride, 0.3 parts of 2,2'-bipyridyl and 100 parts of toluene After mixing, nitrogen deoxygenation was carried out for 90 minutes, the temperature was controlled at 75°C, and the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction was carried out under the protection of nitrogen for 10 hours. The number average molecular weight (Mn) was controlled to 455100, and the molecular weight The ...

Embodiment 2

[0025] Example 2, which is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. In step 1, an adhesive with excellent anti-warping performance for lithium batteries is synthesized, and 30 parts of isooctyl acrylate ( EHA), 20 parts of lauryl acrylate (LA), 5 parts of itaconic acid, 5 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 8 parts of methyl acrylate (MMA) , 1 part of tetrahydrofuran acrylate (THFA), 0.04 part of free radical initiator azobisisobutyronitrile (AIBN), 0.2 part of copper chloride, 0.4 part of 2,2'-bipyridyl and 80 parts of acetic acid After the ethyl ester was mixed, nitrogen deoxygenation was carried out for 50 minutes, the temperature was controlled at 80°C, and the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction was carried out under the protection of nitrogen for 8 hours, and the number average molecular weight (Mn) was controlled to 321500 , the ...

Embodiment 3

[0028] Example 3, which is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. Step 1 synthesizes an adhesive with excellent anti-warping performance for lithium batteries, and 40 parts of isooctyl acrylate ( EHA), 10 parts of lauryl acrylate (LA), 2 parts of itaconic acid, 4 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA) , 2 parts of tetrahydrofuran acrylate (THFA), 0.08 parts of free radical initiator azobisisobutyronitrile (AIBN), 0.1 part of copper chloride, 0.2 parts of 2,2'-bipyridyl and 70 parts of acetic acid After mixing the ethyl ester, carry out nitrogen deoxygenation for 100 minutes, control the temperature at 75°C, and carry out the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction under the protection of nitrogen for 20 hours, and the number average molecular weight (Mn) is controlled at 205200 , the molecular weight polydisp...

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Abstract

The invention relates to the technical field of the safety of lithium batteries and particularly relates to a special anti-warping adhesive for a lithium battery, a preparation method of the special anti-warping adhesive and an anti-warping lug adhesive tape. The special anti-warping adhesive contains the following components in parts by weight: 10-50 parts of iso-octyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of free radical initiator azodiisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2,2'-dipyridyl, 50-150 parts of an organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 part of a curing accelerator. By designing an inorganic and organic dual-hybridization cross-linking system, the cohesion of an adhesive layer is greatly improved, and the anti-warping property of an adhesive lug of the lug adhesive tape is improved.

Description

technical field [0001] The invention relates to the field of lithium battery safety protection, in particular to a special anti-lifting adhesive for lithium batteries, a preparation method thereof, and an anti-lifting tab tape. Background technique [0002] In the assembly and production process of lithium-ion batteries, special tapes are generally used to fix, insulate and protect the tabs of lithium-ion batteries. This special tape for lithium batteries usually uses polymer PI film as the base material, on which special glue is coated, with a thickness of 20-100 mm. Lithium battery special tape usually has good adhesion, no residual glue when the tape is removed, high temperature resistance, electrolyte resistance, and high electrical insulation. At present, acrylic acrylic glue is often used to coat PI film to prepare tab tape. Although the acrylic system tab tape shows good adhesion during the battery assembly process, during the winding process of the tab, the back of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/25C09J7/30C08F220/18C08F220/14C08F222/02C08F220/28H01M10/058
CPCC08F220/18C09J11/06C09J133/08C09J2433/00C09J2479/086C09J7/25C09J7/30C08F220/1808C08F220/1812H01M10/058C08F220/281C08F220/282C08F222/02C08F220/14Y02E60/10Y02P70/50
Inventor 叶志斌曾丽娟
Owner 佛山市顺德区永创翔亿电子材料有限公司