Double-component aqueous adhesive for automotive interior and preparation method of double-component aqueous adhesive

A water-based adhesive, two-component technology, applied in the direction of adhesives, epoxy resin adhesives, adhesive types, etc., can solve the problems of high price and unstable bonding effect, and achieve good bonding strength and good application. Prospect, good initial tack effect

Active Publication Date: 2019-09-24
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adhesives used in the bonding of automotive interior materials need to have good initial tack, heat resistance, environmental stability (resistance to -40°C and 80°C under 80% humidity environment without opening, and pass the PV1200 test) and no odor , has high requirements in performance, and there are few related products in China. The production method of adhesives for automotive interiors introduced in the patent CN102863938B_CN is mainly through the compounding of foreign water-based polyurethane adhesives; currently foreign countries are used for automotive interiors The water-based adhesive for decoration is mainly a two-component system composed of hydroxyl water-based polyurethane and water-dispersed polyisocyanate. During the curing and drying process, the hydroxyl group and -NCO undergo a cross-linking reaction to form a cross-linked structure, which has good heat resistance and environmental protection. Stability, but this type of product has the disadvantages of high price of water-dispersible polyisocyanate, and the side reaction of -NCO and water makes the bonding effect unstable

Method used

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  • Double-component aqueous adhesive for automotive interior and preparation method of double-component aqueous adhesive
  • Double-component aqueous adhesive for automotive interior and preparation method of double-component aqueous adhesive
  • Double-component aqueous adhesive for automotive interior and preparation method of double-component aqueous adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Add 51g oligomer polyol (PEPA, molecular weight 2000, Huada Chemical Group Co., Ltd.), 24.3g IPDI, 0.19g bismuth laurate catalyst at 50°C, heat up to 85°C for 60min, cool to 60°C, add 12.8 g non-ionic hydrophilic monomer polyethylene glycol (PEG1000), 2.79g small molecule chain extender (1,4-butanediol, BDO), react for 30min, heat up to 80°C for 2h, cool down to 50°C and add 28.6 g acetone, add dropwise 2.08 g of sulfonic acid hydrophilic chain extender sodium ethylenediaminoethanesulfonate (AAS) for 30 min, cool down to room temperature, add 7.0 g of epoxy 828, and stir for 2 min to synthesize a polyurethane prepolymer.

[0052] II. Add 180g of deionized water to the polyurethane prepolymer for emulsification, stir at 1000r / min for 5min, then add 3.65gIPDA dropwise at 500r / min, finish adding dropwise in 20-40min, continue to react for 1h, remove the solvent in vacuum to obtain an emulsion.

[0053] III. Add 1% of polyurethane prepolymer quality non-ionic associative...

Embodiment 2

[0056] Add oligomer polyol under 1, 50 ℃, comprise: 35g polyester polyol (PEPA, molecular weight 2000), polypropylene glycol (molecular weight 2000) 10.5g, 27.5g dicyclohexylmethane diisocyanate, 0.18g bismuth laurate catalyst , heat up to 85°C for 60 minutes, cool down to 60°C, add 12.6g PEG1000, 2.5g 1,4-butanediol, react for 30min, heat up to 80°C for 2h, cool down to 50°C, add 27.5g of acetone, dropwise add 2.1g of ethyl alcohol Sodium diaminopropanesulfonate (A95, Beijing Baiyuan Chemical Co., Ltd.) was reacted for 30 minutes, cooled to room temperature and added with 7.0 g of epoxy E-44, 2.02 g of HDI trimer HT-100 (Wanhua Chemical Group Co., Ltd.), 0.87g KH560, stirred for 2min, to synthesize polyurethane prepolymer.

[0057] II. Add 78g of deionized water to the polyurethane prepolymer for emulsification, stir at 1500r / min for 5min, then add 3.72gIPDA dropwise at 300r / min, finish adding dropwise in 20-40min, continue to react for 1h, and remove the solvent in vacuum to...

Embodiment 3

[0061] 1. Add 28g polyester polyol (PEPA), 23.8gIPDI, 0.18g bismuth laurate catalyst at 50°C, heat up to 85°C for 60min, cool to 60°C, add 17.5g butanone, 12.6g PEG1000, 17.5g sulfonic acid Salt diol BY3305B (Beijing Baiyuan Chemical Co., Ltd.) 2.50g 1,4-butanediol, react for 30min, heat up to 80°C for 3h, cool down to 50°C, add 10.8g of acetone, dropwise add 1.75g ​​of silane coupling agent KH550 for reaction After 30 minutes, cool down to room temperature and add 14.0g epoxy E-828, stir for 2 minutes to synthesize polyurethane prepolymer.

[0062] II. Add 174g of deionized water to the polyurethane prepolymer for emulsification, stir at 1500r / min for 5min, then add 6.6gIPDA dropwise at 500r / min, finish adding dropwise in 20-40min, continue to react for 1h, and remove the solvent in vacuum to obtain an emulsion.

[0063] III. Add 0.2% sodium carboxymethylcellulose thickener (Jinan Haoju Chemical Co., Ltd.) of polyurethane prepolymer and 0.1% preservative of polyurethane prepo...

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Abstract

The invention discloses a double-component aqueous adhesive for an automotive interior and a preparation method of the double-component aqueous adhesive. The adhesive is a double-component aqueous adhesive of which a component A is synthesized by firstly introducing sulfonate to a polyurethane prepolymer molecular chain from an oligomer polyhydric alcohol, a nonionic hydrophilic monomer, a polyisocyanate, a micromolecule chain extender, a sulfonate-containing hydrophilic chain extender or a polyhydric alcohol with a sulfonic group, adding certain amounts of a silane coupling agent and an epoxy resin, carrying out uniform stirring, adding water, carrying out stirring emulsification, adding an amino type chain extender, an epoxy group and -NCO after emulsification, and by carrying out a reaction so as to obtain a polyurethane emulsion with amino; a component is an aqueous epoxy resin; the component A and the component B are mixed according to a certain ratio; and an aqueous thickening agent is additionally used to adjust the viscosity of the emulsion to form a novel adhesive system for bonding automotive interior materials. The double-component aqueous adhesive has the characteristics of being good in primary viscosity, thermal resistance and environment change resistance stability and free of smell, and use requirements on the automotive interior materials can be met.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a non-odor, two-component water-based adhesive, a preparation method and application thereof. Background technique [0002] In 2016, China's total automobile production and sales were 28.119 million and 28.028 million respectively, making it the world's largest automobile production and sales country. Automotive interiors are also an important area of ​​growth in adhesive usage. Adhesives commonly used in the automotive industry are mainly solvent-based, water-based and hot-melt. Solvent-based adhesives are restricted in use because of their volatile organic solvents that pollute the environment and endanger human health. Water-based adhesives are an important development direction to replace traditional solvent-based adhesives because they are non-toxic, non-flammable, and easy to use. Adhesives used in the bonding of automotive interior materials need to have good init...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J163/00
CPCC08L2201/08C09J175/04C08L63/00
Inventor 侯立杰刘志勇季明航刘咏杭张守鹏徐同辉李世宇艾仕利刘悦杨雪吴现
Owner YANTAI UNIV
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