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Polyurethane adhesive for bonded foam insoles and preparation method of polyurethane adhesive

A technology of polyurethane adhesives and insoles, which is applied in the direction of polyurea/polyurethane adhesives, adhesive types, insoles, etc., can solve problems such as uneven reaction, violent reaction, and distribution of adhesive agglomerates, and achieve the goal of preparing The method is simple and easy to implement, the reaction efficiency is improved, and the reaction is uniform and stable.

Inactive Publication Date: 2017-03-08
ZHEJIANG HUAFON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This prior art is described in Chinese patent applications with application numbers 201210509899, ​​201410013786.0, 201410534381.1, 201510430057.X and 201510946344.6, but they all use organic tin or organic bismuth catalysts, which have problems such as violent and uneven reactions. Especially when used in the production of recycled sponge insoles, problems such as adhesive agglomeration and adhesion deviation are prone to occur
201110437309.3 patent application discloses environment-friendly high-strength recycled foam polyurethane adhesive and its preparation and use method, wherein the catalyst is N-(dimethylaminoethyl)morpholine, 4-methoxyethylmorpholine or 2,2-bismorpholine One or more of the linyl diethyl ethers also have the problem of violent reaction and uneven reaction to a certain extent. When used in the production of recycled sponge insoles, it is easy to cause adhesive agglomerates to be distributed in the insole, and the overall insole is sticky. Knot force deviation
[0007] Therefore, the application of one-component moisture-curing adhesives in recycled sponge insoles has been limited.

Method used

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  • Polyurethane adhesive for bonded foam insoles and preparation method of polyurethane adhesive
  • Polyurethane adhesive for bonded foam insoles and preparation method of polyurethane adhesive
  • Polyurethane adhesive for bonded foam insoles and preparation method of polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 10.00kg polyether polyol P1 (hydroxyl value 32mgKOH / g, ethylene oxide content is 70%) and 20.00kg polyether polyol P2 (hydroxyl value 48mgKOH / g, ethylene oxide content is 65%) Put it into the reaction kettle, heat up to 110°C, vacuum dehydrate for 1.5h, cool down to 45°C, add 1.2g phosphoric acid, 14.00kgMDI and 2.00kg liquefied MDI, heat up to 65°C, react for 2.5h, add 3.00kgPMDI, stir for 0.5h , lower the temperature to below 38°C, add 8.50kg of dichloromethane, and stir for 0.5h to obtain a polyurethane adhesive for regenerated sponge insoles.

Embodiment 2

[0031] 10.00kg polyether polyol P1 (hydroxyl value 36mgKOH / g, ethylene oxide content is 65%) and 20.00kg polyether polyol P2 (hydroxyl value 48mgKOH / g, ethylene oxide content is 65%) Put it into the reaction kettle, heat up to 120°C, vacuum dehydrate for 1.0h, cool down to 55°C, add 1.2g phosphoric acid, 10.00kgMDI and 2.00kg liquefied MDI, heat up to 70°C, react for 2.0h, add 6.00kgPMDI, stir for 1.0h , lower the temperature to below 38°C, add 12.00kg of dichloromethane, and stir for 1.0h to obtain a polyurethane adhesive for regenerated sponge insoles.

Embodiment 3

[0033] 7.05kg polyether polyol P1 (hydroxyl value 36mgKOH / g, ethylene oxide content is 65%) and 21.15kg polyether polyol P2 (hydroxyl value 50mgKOH / g, ethylene oxide content is 70%) Put it into the reaction kettle, heat up to 110°C, vacuum dehydrate for 1.5h, cool down to 45°C, add 2.4g phosphoric acid, 6.00kgMDI and 4.80kg liquefied MDI, heat up to 65°C, react for 2.5h, add 6.00kgPMDI, stir for 1.0h , lower the temperature to below 38°C, add 15.00kg of dichloromethane, and stir for 0.5h to obtain a polyurethane adhesive for regenerated sponge insoles.

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Abstract

The invention provides a polyurethane adhesive for bonded foam insoles and a preparation method of the polyurethane adhesive. The adhesive is prepared from the following raw materials: 10wt%-25wt% of MDI (4,4'-methane diphenyl -diisocyanate), 3wt%-10wt% of PMDI (polymethylene polyphenyl isocyanate), 1wt%-10wt% of liquefied MDI (carbodiimide-modified MDI), 35wt%-65wt% of polyether polyol, 20-60 ppm of phosphoric acid and 10wt%-25wt% of a diluent. The polyurethane adhesive does not contain any solvent, TDI, catalyst or other toxic substances and particularly adopts no organometallic catalyst or amine and morpholine internally added catalysts, the system is more non-toxic and environmentally friendly, the reaction is uniform and smooth, and the prepared bonded foam insoles have no agglomerates and are good in toughness; polyether polyol with high content of ethylene oxide is selected, the hydrophilicity and the reaction efficiency of the adhesive are improved, and the system can react smoothly even in the absence of catalysts. The preparation method is simple and easy to implement.

Description

technical field [0001] The invention relates to a polyurethane adhesive and a preparation method thereof. Background technique [0002] Recycled sponge, also known as Hyperion cotton and Polyyou foam, is a special polymer material made by bonding discarded recycled sponges with a special adhesive. [0003] The sponge has a large number of open pore structures, so the regenerated sponge has excellent moisture absorption, breathability, shock absorption, softness and comfort, and can be used to make insoles, cushions, etc. [0004] The preparation method of the regenerated sponge: first crush the reclaimed sponge, then add a binder and mix evenly, then pass through water vapor to solidify and shape, and finally ripen the slices. [0005] The traditional moisture-curing polyurethane adhesive uses a two-component system of toluene diisocyanate (TDI) and polyether polyol, which has strong adhesion, but because TDI is volatile, has a pungent odor, and is highly toxic, it affects ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/48C08G18/76A43B17/14
CPCA43B17/14C08G18/4812C08G18/485C08G18/7664C08G18/7671C09J175/08
Inventor 蔡万东赵叶宝章海飞陈俊汪忠敏金美金
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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