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Poly(carbonate-ether) aqueous polyurethane, aqueous polyurethane adhesive and preparation method thereof

A water-based polyurethane and carbonate technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as reducing the use efficiency of water-based polyurethane adhesives, and achieve excellent storage stability, excellent peeling force, The effect of improving utilization efficiency

Active Publication Date: 2014-01-01
HUAFON GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a long time to remove a large amount of water during use, which reduces the use efficiency of water-based polyurethane adhesives

Method used

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  • Poly(carbonate-ether) aqueous polyurethane, aqueous polyurethane adhesive and preparation method thereof
  • Poly(carbonate-ether) aqueous polyurethane, aqueous polyurethane adhesive and preparation method thereof
  • Poly(carbonate-ether) aqueous polyurethane, aqueous polyurethane adhesive and preparation method thereof

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preparation example Construction

[0066] The invention also discloses a preparation method of water-based polyurethane adhesive, which comprises the following steps:

[0067] 0.2-0.5 parts by weight of water-based thickener, 0.03-0.15 parts by weight of water-based leveling agent, 0.02-0.04 parts by weight of water-based defoamer, 7-12 parts by weight of plasticizer, 16-35 parts by weight of talcum powder, 3-8 parts by weight of titanium dioxide and 0.3-0.9 parts by weight of fumed white carbon black are stirred to obtain the first component;

[0068] Add 8-12 parts by weight of a water-based curing agent into the first component, and stir for 3-5 minutes to obtain a water-based polyurethane adhesive.

[0069] According to the present invention, first poly(carbonate-ether) type water-based polyurethane emulsion, water-based thickener, water-based leveling agent, water-based defoamer, plasticizer, talcum powder, titanium dioxide and fumed silica are stirred and stirred , the rotational speed of the stirring is...

Embodiment 1

[0074] Add 150g of low molecular weight poly(carbonate-ether) glycol (molecular weight: 1500 Daltons) into the three-necked flask, heat to 110°C, dehydrate at -0.98MPa for 1 hour, cool down to 75°C, and add 12.4g of trimethylolpropane and 110ml of acetone, add dropwise 63g of isophorone diisocyanate and 11.6g of 1,6-hexamethylene diisocyanate mixture, after the dropwise addition, react for 2.5 hours to obtain the first intermediate body.

[0075] Add 120ml of acetone to the first intermediate, lower the temperature to 70°C, add 0.0015g of dibutyltin dilaurate catalyst, and add 35g of dimethylolpropionic acid hydrophilic chain extender in three batches. After the addition is complete, the reaction is 0.5 hours, the second intermediate was obtained.

[0076] Add 180ml of acetone to the second intermediate, add 12.6g of diethylene glycol, raise the temperature to 85°C, and react for 2 hours. Cool down to 35°C, add 312g deionized water, then add 45g dimethylethanolamine, stir fo...

Embodiment 2

[0078] Add 700g of low molecular weight poly(carbonate-ether) glycol (molecular weight: 7000 Daltons) into the three-necked flask, heat to 120°C, dehydrate at -0.98MPa for 3 hours, cool down to 85°C, under nitrogen protection, add 14.5g of trimethylolpropane and 180ml of acetone, dropwise add 89g of isophorone diisocyanate and 23.8g of 1,6-hexamethylene diisocyanate mixture, after the dropwise addition, react for 4 hours to obtain the first intermediate body.

[0079] Add 270ml of acetone to the first intermediate, lower the temperature to 75°C, add 0.0045g of stannous octoate catalyst, add 78g of dimethylolpropionic acid hydrophilic chain extender in three batches, and react for 2 hours after adding, A second intermediate is obtained.

[0080] Add 260ml of acetone to the second intermediate, add 17g of diethylene glycol, raise the temperature to 90°C, and react for 3 hours. Cool down to 40°C, add 731g of deionized water, then add 62g of dimethylethanolamine, stir for 15min,...

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Abstract

The invention provides a poly(carbonate-ether) aqueous polyurethane emulsion, an aqueous polyurethane adhesive having the poly(carbonate-ether) aqueous polyurethane emulsion as the main component and a preparation method of the aqueous polyurethane adhesive. According to the invention, dimethylolpropionic acid and diaminosulfonate are commonly used as hydrophilic chain extenders; with introduction of diaminosulfonate, the use amount of dihydroxytoluene is reduced, therefore, the phase inversion time is in advance; the solid content of the finally prepared poly(carbonate-ether) aqueous polyurethane emulsion is increased; when the poly(carbonate-ether) aqueous polyurethane emulsion is used as the adhesive, water in the poly(carbonate-ether) aqueous polyurethane emulsion does not need to be removed; the utilization efficiency of the poly(carbonate-ether) aqueous polyurethane emulsion is increased; the aqueous polyurethane adhesive prepared by the step of mixing the poly(carbonate-ether) aqueous polyurethane emulsion with other additives has excellent release force and tensile strength; and experimental results show that: the release force of the aqueous polyurethane adhesive provided by the invention is 150-220N / cm; and the tensile strength is up to 13.5-17.8MPa.

Description

technical field [0001] The invention relates to the field of water-based adhesives, in particular to a poly(carbonate-ether) type water-based polyurethane emulsion, a water-based polyurethane adhesive and a preparation method thereof. Background technique [0002] Waterborne polyurethane refers to the polyurethane system with water as the dispersion medium. It has the characteristics of no pollution, safety and reliability, and excellent mechanical properties. It is an important direction for the development of the polyurethane industry and can be widely used in coatings, adhesives, fabric coatings and finishing agents, and leather. Coating agents and paper surface treatment agents and other fields. Water-based polyurethane mainly includes polyester-based water-based polyurethane and polyether-based water-based polyurethane. [0003] Polyester-type water-based polyurethane has poor hydrolysis resistance, but excellent mechanical properties; although polyether-type water-bas...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/48C08G18/44C08G18/32C08G18/12C09J175/08
CPCC08G18/12C08G18/3228C08G18/324C08G18/348C08G18/6685C08G18/6692C08G18/73C08G18/751C08G18/755C08G18/758C08G2170/80C09J175/08
Inventor 张红明乔立军王献红李季王佛松
Owner HUAFON GROUP
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