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Preparation method of polyurethane surface coating adhesive for lithium battery aluminum plastic film

A polyurethane and aluminum-plastic film technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as damage and short-circuit resistance degradation, and achieve good corrosion resistance and excellent initial bond strength , good ductility effect

Pending Publication Date: 2021-08-13
JIANGSU LIHE ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The van der Waals force in MPP is destroyed at high temperature, aging, and the short-circuit resistance performance will drop sharply

Method used

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  • Preparation method of polyurethane surface coating adhesive for lithium battery aluminum plastic film

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Experimental program
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Effect test

Embodiment 1

[0021] The polyurethane surface coating glue for lithium battery aluminum-plastic film of the present invention is compounded by A glue and B glue two components, wherein A glue is a hyperbranched polyol resin, B glue is a polyisocyanate compound, and the specific preparation steps are as follows:

[0022] Preparation of glue A: prepare hyperbranched polyol resin by one-step feeding method, take 160g of diethylene glycol, 320g of ketone-aldehyde resin and 40g of methyl acetone in a reaction vessel, stir and dissolve, add 32g of IPDI, and slowly heat up to 100°C, Cool down after 10 hours of heat preservation, then add 160g of ethyl acetate to dilute the obtained gel A;

[0023] Preparation of glue B: Take 500g TDI, 210g MDI-50 and 270g ethyl acetate in a flask respectively, when the temperature rises to 45°C, add 75g trimethylolpropane, at this time, it is an exothermic reaction, and the cooling needs to be properly controlled, 30min Afterwards, add 75g of trimethylolpropane an...

Embodiment 2

[0027] The preparation process of the present embodiment 2 is specifically as follows:

[0028] Preparation of glue A: prepare hyperbranched polyol resin by one-step feeding method, take 170g of diethylene glycol, 300g of ketone-aldehyde resin and 40g of methyl acetone in a reaction vessel, add 42g of IPDI after stirring and dissolving, and slowly heat up to 105°C, Cool down after 10 hours of heat preservation, then add 160g of ethyl acetate to dilute the obtained gel A;

[0029] Preparation of glue B: Take 500g TDI, 210g MDI-50 and 270g ethyl acetate in a flask respectively, when the temperature rises to 45°C, add 75g trimethylolpropane, at this time, it is an exothermic reaction, and the cooling needs to be properly controlled, 30min Afterwards, add 75g of trimethylolpropane and control the temperature, and after a period of heat preservation, glue B can be obtained;

[0030] Preparation of polyurethane surface coating glue: A glue, B glue and thinner are blended in proport...

Embodiment 3

[0032] The concrete preparation steps of this embodiment 3 are as follows:

[0033] Preparation of glue A: prepare hyperbranched polyol resin by one-step feeding method, take 140g of diethylene glycol, 340g of ketone-aldehyde resin and 40g of methyl acetone in a reaction vessel, add 32g of IPDI after stirring and dissolving, and slowly heat up to 100°C, Cool down after 10 hours of heat preservation, then add 160g of ethyl acetate to dilute the obtained gel A;

[0034] Preparation of glue B: Take 500g TDI, 210g MDI-50 and 270g ethyl acetate in a flask respectively, when the temperature rises to 45°C, add 75g trimethylolpropane, at this time, it is an exothermic reaction, and the cooling needs to be properly controlled, 30min Afterwards, add 75g of trimethylolpropane and control the temperature, and after a period of heat preservation, glue B can be obtained;

[0035] Preparation of polyurethane surface coating glue: A glue, B glue and thinner are blended in proportion and at a...

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Abstract

The invention discloses a preparation method of a polyurethane surface coating adhesive for a lithium battery aluminum plastic film, the polyurethane surface coating adhesive is prepared by compounding an adhesive A, an adhesive B and a diluent, the adhesive A is hyperbranched polyol resin, and the adhesive B is a polyisocyanate compound. Hyperbranched polyol resin is a polyhydroxy ketoaldehyde resin modifier, the polyhydroxy ketoaldehyde resin does not contain ester bonds in the structure, so that the polyhydroxy ketoaldehyde resin has better corrosion resistance, cyclohexyl on a main bond enables the polyhydroxy ketoaldehyde resin to have heat resistance, however, the ketoaldehyde resin is higher in softening point (generally higher than 80 DEG C) and stronger in brittleness, and cannot be independently applied at normal temperature, the keto-aldehyde resin is modified by introducing a proper amount of soft segments, high-quality coating at normal temperature is successfully realized, and a final product prepared by the method has the advantages of excellent initial adhesion strength, better ductility, higher peel strength, excellent chemical corrosion resistance and the like.

Description

technical field [0001] The invention relates to an adhesive, in particular to a method for preparing a polyurethane surface coating adhesive for aluminum-plastic films of lithium batteries, and belongs to the technical field of adhesive materials. Background technique [0002] The packaging material used in soft-pack lithium batteries is aluminum-plastic composite film, referred to as aluminum-plastic film, which is mainly used in the packaging and packaging of soft-pack lithium-ion battery cells. Soft-pack lithium batteries packaged in aluminum-plastic film are mainly used in the 3C field. In recent years, they have gradually penetrated into the new energy vehicle industry, providing safe and stable power output for various types of vehicles. The design and manufacturing technology requirements of aluminum-plastic film are relatively high. At present, 90% of the domestic market is mainly monopolized by Japanese and Korean companies such as DNP / Showa Denko of Japan and Kurim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/54C08G18/65C08G18/32
CPCC08G18/3206C08G18/548C08G18/6511C08G18/6517C09J175/04
Inventor 蔡栋宇谢利军周锦君顾嘉卫陈志君周梦亮
Owner JIANGSU LIHE ADHESIVE