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Acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid and production method and application of acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid

An acrylate and unsaturated technology, used in the field of acrylate adhesives and its preparation, can solve the problems of poor tolerance to ester solvents, poor toughness, strong water absorption, etc., and achieve high adhesion, low modulus, The effect of low water absorption

Active Publication Date: 2019-12-31
湖南高瑞电源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, acrylate adhesives also have certain defects, such as poor toughness, strong water absorption, and poor resistance to ester solvents, which have a negative impact on their application in lithium batteries.

Method used

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  • Acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid and production method and application of acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid
  • Acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid and production method and application of acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid
  • Acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid and production method and application of acrylate adhesive modified by long-chain unsaturated carboxylic acid or derivative of long-chain unsaturated carboxylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Inject pure water, acrylic acid, hydroxyethyl acrylate, initiator ammonium persulfate and emulsifier SR-10 into the reaction vessel, stir well until a homogeneous solution is formed, and add saturated sodium hydroxide solution dropwise to adjust the pH value to 6-8 . After dissolving glycerol monooleate in a mixed solution of methyl methacrylate, butyl acrylate and isooctyl acrylate, the mixed solution was injected into a reaction vessel under stirring conditions, and stirred for pre-emulsification for 1 h. Keep stirring, raise the reaction temperature to 65°C, react for 6 hours, and then cool and discharge to obtain the finished water-based emulsion adhesive.

Embodiment 2

[0040] Inject the solvent dimethyl sulfoxide and the initiator ammonium persulfate into the reaction vessel, stir well to completely dissolve the initiator. Then inject acrylic acid, glycerol monooleate, styrene, butyl acrylate and isooctyl acrylate under stirring conditions, stir until a homogeneous solution is formed, and add metered ethylenediamine to completely neutralize the acrylic acid. Raise the reaction temperature to 70°C, react for 6 hours, and then cool and discharge to obtain the finished organic solvent-based adhesive.

Embodiment 3

[0042] Take the emulsion binder as described in Example 1 (solid content is 30wt%), and prepare lithium battery ceramic diaphragm slurry (parts by mass) according to the following formula: 250 parts of pure water, 190 parts of alumina powder ceramics, viscose 25 parts of mixture, 35 parts of thickener (0.5wt% aqueous solution), 1.5 parts of dispersant, and 0.75 parts of wetting agent. The prepared slurry was coated on the surface of the separator with a 10 μm wire bar coater and dried, and the coating was uniform and compact without defects such as impurities, bubbles, and missing coatings visible to the naked eye. After the coated separator is placed in an electric blast drying oven at 130°C for 1 hour, the shrinkage in the transverse and longitudinal directions shall not exceed 2%.

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Abstract

The invention discloses acrylate adhesive modified by a long-chain unsaturated carboxylic acid or a derivative of the long-chain unsaturated carboxylic acid and a production method and application ofthe acrylate adhesive modified by the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid. According to the acrylate adhesive modified by the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid, the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid is introduced into a molecular chain of the acrylate adhesive, the long-chain unsaturated carboxylic acid is an unsaturated carboxylic acid with carbon chain length equal to or larger than 12, thederivative of the long-chain unsaturated carboxylic acid is a derivative carboxylate, ester, amide, acyl halide or anhydride, and the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid is preferably an oleic acid, a ricinoleic acid or a glyceride. According to the acrylate adhesive modified by the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid and the production method and application of the acrylate adhesive modified by the long-chain unsaturated carboxylic acid or the derivative of the long-chain unsaturated carboxylic acid, the long-chain unsaturated carboxylic acid and the derivative of the long-chain unsaturated carboxylic acid, which are represented by the oleic acid, the ricinoleic acid or the glyceride, are selected as modifying monomers, raw materials are simple and easy to obtain, the cost is low, in the premise of guaranteeing a good modifying effect, the raw materialcost can be effectively controlled, and the obtained lithium battery adhesive has the characters of high adhesion, electrolyte resistance, low water absorption, flexibility and the like at the same time, and can well meet the production requirements of lithium battery ceramic diaphragm slurry, negative electrode slurry and positive electrode slurry respectively.

Description

technical field [0001] The invention relates to a lithium battery adhesive, in particular to an acrylate adhesive modified by a long-chain unsaturated carboxylic acid or a derivative thereof, a preparation method and application thereof. Background technique [0002] At present, all kinds of new energy batteries represented by lithium-ion batteries are widely used in daily life and cutting-edge technology fields. With the increasing demand for new energy batteries in the market, how to improve production efficiency and expand production capacity under the premise of ensuring the safety and effectiveness of batteries has become an urgent problem for major new energy battery manufacturers and their upstream suppliers. . The main components of the battery include the shell, the electrolyte, the positive and negative electrodes, and the separator. Among them, the separator, the negative electrode, and the positive electrode, which are the core components of the battery, all inv...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/20C08F220/14C08F220/18C08F220/68C08F212/08H01M4/62H01M10/0525
CPCC08F212/08C08F220/06C08F220/14C08F220/18C08F220/20C08F220/68H01M4/622H01M10/0525Y02E60/10
Inventor 蔡小川席柳江刘龙刘海明黄梦琴陈华丽
Owner 湖南高瑞电源材料有限公司
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