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Polyurethane adhesive used for structural bonding of power battery PACK

A polyurethane adhesive, power battery technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of PI, PET material bonding is not ideal, poor aging resistance, bonding Poor performance and other problems, to achieve the effect of improving mechanical properties and aging properties, excellent aging resistance, and excellent bonding properties

Inactive Publication Date: 2019-04-12
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the epoxy resin adhesive in the prior art has good adhesion to metal, it is not ideal for the adhesion of PI and PET materials. Conditions are less tolerant
The second generation of acrylic adhesives has the problems of difficult to meet the requirements of both adhesive performance and toughness at the same time, poor aging performance and poor storage stability.
However, traditional polyurethane adhesives have disadvantages such as poor adhesion to various materials and poor aging resistance.
At present, there is no polyurethane adhesive with excellent bonding performance and excellent aging performance for plastic materials such as PI, PET, PC and metal materials such as aluminum, steel and their alloys without surface treatment.

Method used

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  • Polyurethane adhesive used for structural bonding of power battery PACK

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of epoxy resin polyol: Mix 30kg of bisphenol F diglycidyl ether epoxy resin and 5.5kg of diphenylmethane diisocyanate, the mixing order is to add isocyanate to epoxy resin, and use a stirring speed of 300r / min for stirring treatment, adjust the temperature to 210°C, after the reaction for 1h, lower the temperature to 45°C, add 50kg of polyoxypropylene triol with a molecular weight of 1000, keep stirring and slowly adjust the temperature to 70°C, and react for 2h After cooling to normal temperature to obtain epoxy resin polyol, stand-by;

[0028] (2) Preparation of isocyanate-terminated polyurethane prepolymer: Take 100kg of polyoxypropylene diol with a molecular weight of 2000 and heat it up to 110°C and vacuumize it to -0.098MPa. During this process, stir at a stirring speed of 450r / min and keep stirring for dehydration After 2 hours, cool down to 45°C, add 120kg of liquefied MDI in proportion, adjust the temperature to 70°C after the reaction temperat...

Embodiment 2

[0032] (1) Preparation of epoxy resin polyol: Mix 30kg of bisphenol A diglycidyl ether epoxy resin and 5kg of diphenylmethane diisocyanate, the mixing order is to add isocyanate to epoxy resin, and use a stirring speed of 300r / Min for stirring treatment, adjust the temperature to 210°C, after 1 hour of reaction, lower the temperature to 45°C, add 50kg of polyoxypropylene triol with a molecular weight of 1000, keep stirring and slowly adjust the temperature to 70°C, after 2 hours of reaction Cool to normal temperature to obtain epoxy resin polyol, stand-by;

[0033](2) Preparation of isocyanate-terminated polyurethane prepolymer: Take 100kg of castor oil-modified diol with a molecular weight of 3000 and heat it up to 110°C and vacuumize it to -0.098MPa. During this process, stir at a stirring speed of 450r / min. After stirring and dehydrating for 2 hours, cool down to 45°C, add 110kg of liquefied MDI in proportion, adjust the temperature to 70°C after the reaction temperature n...

Embodiment 3

[0037] (1) Preparation of epoxy resin polyol: Mix 30kg of bisphenol F diglycidyl ether epoxy resin and 6kg of liquefied MDI. The mixing order is to add isocyanate to the epoxy resin, and use a stirring speed of 300r / min for stirring treatment , adjust the temperature to 210°C, reduce the temperature to 45°C after 1 hour of reaction, add 50 kg of castor oil modified polyol with a molecular weight of 1000, keep stirring and slowly adjust the temperature to 70°C, and cool to room temperature after 2 hours of reaction Get epoxy resin polyol, stand-by;

[0038] (2) Preparation of isocyanate-terminated polyurethane prepolymer: Take 100kg of castor oil-modified diol with a molecular weight of 2000 and heat it up to 110°C and vacuumize it to -0.098MPa. During this process, stir at a stirring speed of 450r / min. After stirring and dehydrating for 2 hours, cool down to 45°C, add 120kg of liquefied MDI in proportion, adjust the temperature to 70°C after the reaction temperature no longer ...

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Abstract

The invention relates to a polyurethane adhesive used for structural bonding of power battery PACK. The polyurethane adhesive comprises an A component and a B component, wherein a volume ratio of theA component to the B component is 1:1; the A component comprises the following materials, in parts by weight: 5-20 parts of an epoxy resin modified polyol, 15-30 parts of a benzene ring-containing polyol, 10-25 parts of a bio-based polyol, 0-3 parts of a crosslinking agent, 0-0.05 part of a catalyst, 20-35 parts of a flame retardant, 3-10 parts of a molecular sieve and 0-5 parts of a thixotropic agent; and the B component comprises the following materials, in parts by weight: 50-70 parts of an isocyanate-terminated polyurethane prepolymer, 0-20 parts of isocyanate, 18-30 parts of a flame retardant, 0.1-0.3 part of an adhesion accelerant, 3-10 parts of a molecular sieve and 0-5 parts of a thixotropic agent. The polyurethane adhesive prepared by the invention has excellent bonding propertieson untreated-surface plastic materials such as PI, PET and PC and metal materials such as aluminum, steel and alloys of the aluminum and the steel, excellent aging resistance and a lower modulus.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a polyurethane adhesive used for bonding power battery PACK structures and a preparation method thereof. Background technique [0002] Data show that the production and sales of new energy vehicles in 2017 were close to 800,000, reaching 794,000 and 777,000 respectively, a year-on-year increase of 53.8% and 53.3% respectively. The new energy policy dividend has driven the battery industry to "blowout". From 2012 to 2017, domestic power battery companies have developed rapidly, and the installed capacity has increased by 55 times in 5 years. It is estimated that by 2020, the production capacity of lithium batteries in my country alone will reach 137GWh per year. The rapid development of the industry promotes the development and improvement of related industries. In terms of the glue used for battery PACK structure bonding, because the surface materials of the power battery PACK ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/06C08G18/76C08G18/58C08G18/48C08G18/42C08G18/36
CPCC08G18/36C08G18/4018C08G18/4045C08G18/42C08G18/4825C08G18/4829C08G18/581C08G18/7671C08K2003/2227C09J11/04C09J11/06C09J175/14C08K13/04C08K7/26C08K3/22C08K5/098
Inventor 刘义修王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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