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Preparation method of water-based adhesive for paper products

A water-based, adhesive technology, applied in the direction of adhesives, adhesive additives, adhesive types, etc., can solve the problems of little cross-linking and branching, poor chemical resistance and water resistance of the adhesive film, and achieve excellent Chemical resistance, good dispersibility, and enhanced water resistance

Inactive Publication Date: 2018-09-14
张剑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: most of the current traditional water-based adhesives are water-based polyurethanes, the molecular chains of which contain ionic groups, and the molecular chains are linear structures, which are rarely cross-linked and branched, resulting in chemical resistance of the adhesive film. In order to solve the problem of poor water resistance and poor water resistance, a method for preparing a water-based adhesive for paper products is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A preparation method of a water-based adhesive for paper products, the preparation method comprising the steps of:

[0022] (1) In parts by weight, take 70~80 parts of deionized water, 30~35 parts of polycaprolactone diol, 10~15 parts of epoxy resin, 5~7 parts of toluene diisocyanate, 3~6 parts of methanol , 2~4 parts of dimethylol propionic acid, 2~4 parts of triethylamine, 1~2 parts of catalyst, dehydration treatment of epoxy resin and polycaprolactone diol, adding dimethylol propionic acid, catalyst , heat up to 58~60°C, add toluene diisocyanate dropwise under stirring, raise the temperature to 70~80°C and let stand for 2~4h, cool down to 58~60°C, add methanol to block for 1~3h, add triethylamine And, under the stirring condition of 900~1000r / min, add deionized water for emulsification and dispersion, remove the agent in vacuum, and obtain the emulsion;

[0023] (2) In parts by weight, take 70-80 parts of emulsion, 10-15 parts of butyl acrylate, 7-9 parts of methyl ...

Embodiment 1

[0027] The catalyst is dibutyltin dilaurate.

[0028] The mixed solution is obtained by mixing absolute ethanol and anhydrous ether evenly at a mass ratio of 4:5 to obtain a mixed solution.

[0029] The anti-mold liquid is mixed with scutellaria baicalensis, coptis, clove, and ethanol solution with a volume fraction of 75% according to the mass ratio of 1:1:1:5, soaked for 5 days, sterile filtered, and the filtrate is collected to obtain the anti-mold liquid.

[0030] A preparation method of a water-based adhesive for paper products, the preparation method comprising the steps of:

[0031] (1) In parts by weight, take 70 parts of deionized water, 30 parts of polycaprolactone diol, 10 parts of epoxy resin, 5 parts of toluene diisocyanate, 3 parts of methanol, 2 parts of dimethylolpropionic acid, 2 parts of triethylamine, 1 part of catalyst, dehydrate epoxy resin and polycaprolactone diol, add dimethylolpropionic acid and catalyst, heat up to 58°C, add toluene diisocyanate drop...

Embodiment 2

[0036] The catalyst is dibutyltin dilaurate.

[0037] The mixed solution is obtained by mixing absolute ethanol and anhydrous ether evenly at a mass ratio of 4:5 to obtain a mixed solution.

[0038] The anti-mildew liquid is mixed with scutellaria baicalensis, coptis, clove, and ethanol solution with a volume fraction of 75% according to the mass ratio of 1:1:1:5, soaked for 7 days, sterile filtered, and the filtrate is collected to obtain the anti-mold liquid.

[0039] A preparation method of a water-based adhesive for paper products, the preparation method comprising the steps of:

[0040] (1) In parts by weight, take 80 parts of deionized water, 35 parts of polycaprolactone diol, 15 parts of epoxy resin, 7 parts of toluene diisocyanate, 6 parts of methanol, 4 parts of dimethylolpropionic acid, 4 parts of triethylamine, 2 parts of catalyst, dehydrate epoxy resin and polycaprolactone diol, add dimethylolpropionic acid and catalyst, heat up to 60°C, add toluene diisocyanate d...

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Abstract

The invention discloses a preparation method of water-based adhesive for paper products, belonging to the technical field of chemical supplies. According to the preparation method, toluene diisocyanate, poly(caprolactone)diol and dimethylolpropionic acid are used as main raw materials; a molecular chain of epoxy resin contains secondary hydroxyl groups and epoxy groups which can react with -NCO groups, the residual -NCO groups in a polyurethane prepolymer are enabled to react with the secondary hydroxyl groups on epoxy resin molecules, and the epoxy resin is grafted on polyurethane molecules,so that the water resistance and solvent resistance of the aqueous polyurethane are improved; furthermore, hydrophobic acrylate is also introduced into polyurethane segments; by means of acrylate modification, the crosslinking degree of the system is improved, and the water resistance of the waterborne polyurethane is improved. The preparation method provided by the invention solves the problem that most of the traditional water-based adhesive adopts water-based polyurethane at present, and the molecular chain of the water-based polyurethane contains ionic groups, has a linear structure and isseldom cross-linked and branched, so that the traditional water-based adhesive is poor in chemical resistance and water resistance.

Description

technical field [0001] The invention belongs to the technical field of chemicals, and in particular relates to a method for preparing a water-based adhesive for paper products. Background technique [0002] Water-based glue, one of the chemical products. Glue plays a very important role in production and life. It is widely used in various fields. The coating film formed by glue can decorate, protect and mark objects. Although most glues on the market are simple to make and cheap, they are also The function is relatively single, and it can only be used simply for decoration. In some special working environments, simple glue cannot meet people's needs. With the improvement of national environmental protection laws and regulations and the gradual enhancement of people's awareness of environmental protection, water-based solvent-based products have become the general trend. In the current situation of the domestic market, water-based glue has become the mainstream of the marke...

Claims

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Application Information

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IPC IPC(8): C09J151/08C09J11/06C09J11/04C08F283/00C08F220/18C08F220/14C08G18/76C08G18/66C08G18/58C08G18/42C08G18/34
CPCC08F283/006C08G18/4045C08G18/4277C08G18/58C08G18/6659C08G18/7614C08K2003/2241C08K2201/011C09J11/04C09J11/06C09J151/08C08K9/10C08K9/02C08K3/22C08K5/0058C08F220/1804
Inventor 张剑徐扣华丁正颖
Owner 张剑
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