Water-soluble low-modulus acrylic resin adhesive and preparation method thereof

An acrylic resin, water-soluble technology, applied in adhesive types, ester copolymer adhesives, etc., can solve problems such as inability to obtain products, achieve small molecule residues, good stability, and a stable and controllable reaction process Effect

Pending Publication Date: 2021-02-26
湖南高瑞电源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, under normal circumstances, the homopolymerization reaction of monomers such as hydroxyethyl acrylate, or the copolymerization reaction containing a large amount of such monomers in the formula, the reaction process is often accompanied by a severe gel process, and the product in the solution state cannot be obtained

Method used

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  • Water-soluble low-modulus acrylic resin adhesive and preparation method thereof

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preparation example Construction

[0036] The application provides a water-soluble low-modulus acrylic resin adhesive and a preparation method thereof, the glass transition temperature of the water-soluble low-modulus acrylic resin adhesive is lower than 0°C, and its storage state is homogeneous and clear , a stable aqueous solution, the pH value of the aqueous solution is 6 to 8, the solid content is 5% to 50%, and the viscosity is 10 to 200000cp; the water-soluble low-modulus acrylic resin adhesive after drying is solid; when When the temperature is higher than 0°C, the tensile modulus and flexural modulus of the water-soluble low-modulus acrylic resin adhesive are lower than 100MPa; the preparation method of the water-soluble low-modulus acrylic resin adhesive, Including: S101, mixing water-soluble acrylate, water-soluble lower alcohol, initiator and pure water in a reaction vessel and fully stirring to obtain a clear aqueous solution, which is the reaction solution; S102, setting the temperature of the react...

Embodiment 1

[0039] 60g of pure water, 30g of isopropanol, 30g of hydroxyethyl acrylate and 0.15g of ammonium persulfate-sodium sulfite composite initiator are dropped into a three-necked bottle equipped with an electric stirring device and a reflux condenser, and the ammonium persulfate-sodium sulfite composite Initiators include: 0.1 g of ammonium persulfate and 0.05 g of sodium sulfite. Fully stir until all the materials are completely dissolved, keep stirring, raise the reaction temperature to 65°C, react for 6 hours, cool and collect.

[0040] The obtained water-soluble low modulus acrylic resin adhesive has a measured solid content of 25.1%. The state is a light yellow clear solution with a viscosity of about 75cp. The dried and cured adhesive is a brownish-yellow rosin-like solid at room temperature. It quickly absorbs moisture and becomes sticky when placed in the air. It is prone to plastic deformation under force and can quickly re-dissolve in water. When the temperature rises ...

preparation Embodiment 2

[0042] Compared with Example 1, the consumption of pure water is changed into 90g, the consumption of hydroxyethyl acrylate is changed into 60g, and the consumption of initiator is changed into 0.3g (containing ammonium persulfate 0.2g and sodium sulfite 0.1g), also added in addition 0.3g chain extender KH570, the rest are the same as in Preparation Example 1.

[0043] The obtained water-soluble low modulus acrylic resin adhesive has a measured solid content of 33.5%. The state is a light yellow clear solution with a viscosity of about 200cp. The dried and cured adhesive is a brownish-yellow translucent silicone-like solid at room temperature, which has the high elasticity of rubber, and is not sticky when placed in the air, and is prone to elastic deformation under force. It gradually swells in water and dissolves completely after standing for about 24 hours. When the temperature rises to about 55°C, the adhesive solid begins to soften gradually, but still retains high elas...

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Abstract

The invention discloses a water-soluble low-modulus acrylic resin adhesive and a preparation method thereof, the glass transition temperature of the water-soluble low-modulus acrylic resin adhesive islower than 0 DEG C, the storage state of the water-soluble low-modulus acrylic resin adhesive is a homogeneous, clear and stable aqueous solution, the pH value of the aqueous solution is 6-8, the solid content is 5%-50%, and the viscosity is 10-200000 cp; the dried water-soluble low-modulus acrylic resin adhesive is a solid; when the temperature is higher than 0 DEG C, the tensile modulus and thebending modulus of the water-soluble low-modulus acrylic resin adhesive are lower than 100MPa; the preparation method comprises the following steps: mixing water-soluble acrylate, water-soluble loweralcohol, an initiator and pure water in a reaction container, and fully stirring to obtain a clear aqueous solution which is a reaction solution; and heating the reaction container to 50-80 DEG C, reacting for 2-8 hours, cooling and collecting a product. Compared with the prior art, the water-soluble low-modulus acrylic resin adhesive is an aqueous solution system, and has the advantages of few small molecule residues, good stability, looser requirements on storage conditions and longer storage life.

Description

technical field [0001] The present application relates to the technical field of lithium battery adhesives, and more specifically, to a water-soluble low-modulus acrylic resin adhesive and a preparation method thereof. Background technique [0002] Acrylic resin is a commonly used water-based adhesive material. The synthetic monomers of acrylic resins can be selected in a wide range, and a water-based acrylic resin adhesive suitable for various purposes can be prepared by combining various monomers with different properties. Most of the acrylic resin synthetic monomers are insoluble in water, and it is impossible to prepare water-based acrylic resin adhesives in the form of solution polymerization. Therefore, the water-based acrylic resin adhesives on the market are usually prepared by emulsion polymerization and stored in the form of polymer emulsion. Yes, the common varieties are pure acrylic emulsion, vinegar acrylic emulsion, styrene acrylic emulsion, silicone acrylic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/14C08F120/20
CPCC09J133/14C08F120/20
Inventor 蔡小川席柳江刘龙刘海明郭春成向金林黄玲
Owner 湖南高瑞电源材料有限公司
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