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A kind of high solid content two-component waterborne polyurethane adhesive with low temperature activation and its preparation method

A technology of water-based polyurethane with high solid content, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of short opening time, large heat consumption, etc., and achieve improved bonding performance, yellowing resistance Excellent denaturation and high peel strength

Active Publication Date: 2020-06-19
惠州市亨迪树脂制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The patent application with the patent application number 20151077443.5 reports a preparation method of a one-component water-based polyurethane adhesive. However, when it is used, the potential activation groups in the molecule still need to be deblocked or activated at high temperature, and the sizing process still consumes a lot of heat energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 400g of PTMEG2000 and 200g of PEBA2000, dehydrate in vacuum at 110°C for 120min, cool down to 70°C, add 0.35g of organic bismuth catalyst (BICAT8118, the same below), and then add 30g of IPDI and 76g of H 12MDI, heat up to 85°C and react for 75 minutes; cool down to 60°C, add 100g of acetone, then add 2.1g of 1,4-butanediol, keep warm at 70°C and react for 120min; add 780g of acetone again, cool down to 50°C, and add 30g dropwise at a uniform speed Sodium ethylenediaminoethanesulfonate deionized water (mass fraction is 50%, the same below), dripped within 30min, then controlled the temperature at 50-55°C for 50min to obtain polyurethane ionomer. Add 650g of deionized water under high-speed dispersion for 30 minutes, then add 2.5g of ethylenediamine for post-chain extension reaction for 30 minutes, and obtain an emulsion containing solvent; distill under reduced pressure to remove the solvent acetone, then add defoamer, wetting and dispersing agent and fluid 1.0g, 10...

Embodiment 2

[0041] Cool 300g of PBA3000 and 300g of PEBA2000 after vacuum dehydration to 75°C, add 0.43g of organic bismuth catalyst in a nitrogen atmosphere, then add 61g of HDI and 13.5g of IPDI, and react at a temperature of 80-85°C for 60 minutes; cool down to below 70°C, Add 120g of acetone, 1.95g of ethylene glycol, 4.6g of 1,6-hexanediol, and react at a temperature of 70-80°C for 180 minutes; add 800g of acetone and cool the system down to 50°C, and dropwise add 23.4g of 2,4 - Deionized water (50%) of sodium diaminobenzenesulfonate, keep warm at 55-60°C for 30 minutes, then add 660g of deionized water under high-speed dispersion, add 2.38g of ethylenediamine for 60 minutes after 5 minutes, and then vacuum remove Acetone, add 1.0g defoamer, 12.0g wetting and dispersing agent, 2.3g leveling thickener to obtain component A of water-based polyurethane adhesive, its solid content is 51.2%, add 43g Desmodur DN to component A and stir Uniform, the minimum activation temperature of the obt...

Embodiment 3

[0043] The difference between this embodiment and Example 1 is that the mixed polyol is PBA3000, PTMEG2000 and PPG2000 in this formula, and its consumption is respectively 300g, 220g and 80g, and the consumption of organic bismuth catalyst is 0.38g; Mixed polyisocyanate is HDI, IPDI and H 12 MDI, its consumption is 28g, 7.5g and 44g respectively; It is hexamethylenediamine, and the dosage is 4.8g; defoamer, wetting and dispersing agent and leveling thickener are respectively 1.0g, 9.0g and 3.1g, and the solid content of component A of the obtained water-based polyurethane adhesive is 52.9%. Add 50g of Desmodur N3600 to the components and stir evenly. The minimum activation temperature of the obtained product is 15°C, the peel strength is 9.5N / mm, and the heat aging resistance is 8.2N / mm.

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Abstract

The invention provides a high-solid content two-component aqueous polyurethane adhesive having a low temperature activating property and a preparation method thereof. The adhesive comprises, by mass, 90 to 97% of a component A and 3 to 10% of a component B. The component A comprises, by mass, 0 to 50% of mixed polyol, 0 to 2% of a catalyst, 0 to 9% of polyisocyanate, 0 to 5% of a polyhydroxy micromolecular chain extender, 0 to 5% of a sulfamate hydrophilic chain extender, 0 to 50% of deionized water, 0 to 4% of an amine chain extender, 0 to 3% of a defoaming agent, 0 to 3% of a wetting and dispersing agent and 0 to 3% of a leveling thickener, and the component B is an aliphatic polyisocyanate curing agent. The aqueous adhesive has solid content of more than 50%, can be dried and activated at a temperature below the room temperature, has high peel strength and good heat resistance, can be used for bonding shoe materials and automotive interior materials and has a large economic value.

Description

technical field [0001] The invention relates to the technical field of preparation of water-based polyurethane adhesives, in particular to a preparation method of high-solid-content two-component water-based polyurethane adhesives with low-temperature activation. Background technique [0002] The production process of solvent-based adhesives requires a large amount of organic solvents, which cause great harm to the environment and human body when used. Water-based adhesives can not only greatly reduce the damage of organic solvents to the atmospheric environment, but also save resources. [0003] At present, neoprene rubber and polyurethane glue are used in the largest amount in shoe adhesives. Neoprene rubber for shoes has a low activation temperature, and after the solvent or water evaporates, it can be bonded at room temperature. However, neoprene rubber has poorer cohesive strength than polyurethane, poor heat resistance, and yellowing resistance, so it is mostly used fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J175/06C08G18/48C08G18/60C08G18/76C08G18/75C08G18/73C08G18/32C08G18/66C08G18/65
CPCC08G18/12C08G18/3206C08G18/4054C08G18/4063C08G18/48C08G18/4804C08G18/4808C08G18/4854C08G18/60C08G18/62C08G18/6529C08G18/6685C08G18/722C08G18/724C08G18/73C08G18/755C08G18/7671C08G2170/80C09J175/06C09J175/08C08G18/3228
Inventor 曹高华
Owner 惠州市亨迪树脂制品有限公司
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