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Preparation method of aqueous transfer adhesive

A transfer adhesive, water-based technology, applied in the direction of adhesives, acidic copolymer adhesives, adhesive types, etc., can solve the problem that the adhesion of the transfer adhesive to the aluminum plating layer needs to be improved, the elasticity of the acrylate transfer adhesive is poor, and the aging resistance is poor and other problems, to achieve the effect of weakening the aging effect, accelerating the curing efficiency, and increasing the crosslinking density

Inactive Publication Date: 2019-11-26
周建兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention is mainly acrylate transfer glue and styrene-butadiene transfer glue on the market at present. The aging resistance of styrene-butadiene transfer glue is poor and benzene will be produced after UV irradiation, and the elasticity of acrylate transfer glue is poor, and it is easy to break after folding. Or separation from the aluminum coating layer, and the defect that the adhesion of the transfer adhesive to the aluminum coating layer needs to be improved, a preparation method for a water-based transfer adhesive is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of aqueous emulsion:

[0035] In parts by weight, add 50 parts of distilled water, 10 parts of sodium dodecylsulfonate, and 4 parts of sodium bicarbonate into a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, and start the stirrer Stir at a speed of 200r / min, heat up the water bath to 70°C, add 40 parts of acrylic acid and 20 parts of methacrylic acid into the four-necked flask, and continue the reaction for 10 minutes to obtain a pre-emulsion;

[0036] In parts by weight, add 20 parts of epoxidized soybean oil to the above-mentioned four-necked flask, and then dropwise add 1 to 3 parts of potassium persulfate at a rate of 3 mL / min to the four-necked flask with a dropping funnel. Afterwards, heat-preserve for 30 minutes, continue to heat up to 90°C, heat-preserve and reflux for 45 minutes, cool down to 55°C, adjust the pH to 6.0 with ammonia water with a mass fraction of 20%, and discharge to obtain an aqu...

Embodiment 2

[0045] Preparation of aqueous emulsion:

[0046] In parts by weight, add 55 parts of distilled water, 12 parts of sodium dodecylsulfonate, and 4 parts of sodium bicarbonate into a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, and start the stirrer Stir at a speed of 210r / min, heat up the water bath to 80°C, add 42 parts of acrylic acid and 25 parts of methacrylic acid into the four-necked flask, and continue the reaction for 12 minutes to obtain a pre-emulsion;

[0047] In parts by weight, add 25 parts of epoxidized soybean oil in the above-mentioned four-necked flask, then drop 2 parts of potassium persulfate with a dropping rate of 4mL / min in the four-necked flask with a dropping funnel, after the dropwise addition, Insulate and react for 35 minutes, continue to heat up to 95°C, heat-preserve and reflux for 50 minutes, cool down to 57°C, adjust the pH to 6.5 with 20% ammonia water, and discharge to obtain an aqueous emul...

Embodiment 3

[0056] Preparation of aqueous emulsion:

[0057] In parts by weight, add 60 parts of distilled water, 15 parts of sodium dodecylsulfonate, and 5 parts of sodium bicarbonate into a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, and start the stirrer Stir at a speed of 220r / min, heat up the water bath to 85°C, add 45 parts of acrylic acid and 30 parts of methacrylic acid into the four-necked flask, and continue the reaction for 15 minutes to obtain a pre-emulsion;

[0058] In parts by weight, add 30 parts of epoxidized soybean oil in the above-mentioned four-necked flask, then drop 3 parts of potassium persulfate with a dropping rate of 5mL / min in the four-necked flask with a dropping funnel, after the dropwise addition, Insulate and react for 40 minutes, continue to heat up to 100°C, heat-preserve and reflux for 55 minutes, cool down to 60°C, adjust the pH to 7.0 with ammonia water with a mass fraction of 20%, discharge to o...

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Abstract

The invention discloses a preparation method of an aqueous transfer adhesive, and belongs to the technical field of adhesives. In a process of preparing the aqueous emulsion, epoxy soybean oil and acrylate are subjected to a hydroxyl condensation dehydration reaction to form a network interpenetrating cross-linking structure, and the epoxy soybean oil contains polar groups such as epoxy groups, ether bonds, hydroxyl groups and the like and contains active groups, so that the aqueous emulsion shows excellent bonding performance, and adhesion force of the transfer adhesive to an aluminum coatedlayer is improved. According to the invention, elastic polyester is used as filling resin of the aqueous emulsion and contains relatively stable anhydride groups. The aqueous transfer adhesive provided by the invention can stably bond an aluminum coated layer and a paper layer. Active rubber powder mainly consists of carbon nanotubes and titanium dioxide. Through preparation of the active rubber powder, absorption of titanium dioxide on ultraviolet light is improved, and the aging effect of ultraviolet light on the transfer adhesive is weakened. Epoxy groups and hydroxyl groups in the epoxidized soybean oil enable the resin filling the transfer adhesive to have reactive adhesive force, the curing efficiency is accelerated, and adhesive force is improved.

Description

technical field [0001] The invention discloses a preparation method of water-based transfer glue, which belongs to the technical field of adhesives. Background technique [0002] Transfer glue has strict requirements on VOC (volatile organic compounds). Transfer adhesive products are generally used in the tobacco industry. Tobacco industry manufacturers will carry out strict testing. Therefore, during the production, packaging, transportation, and use of transfer adhesives, contact with organic volatiles such as toluene should be strictly avoided. [0003] Existing transfer adhesives include water-based transfer adhesives, oil-based transfer adhesives, and hot-melt adhesives. Oil-based transfer glue has been eliminated due to serious pollution and many residual solvents, which do not meet the hygienic requirements. Hot-melt adhesives have poor leveling properties, large coating volumes, and high costs, making them difficult to be accepted by packaging and printing manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/02C09J167/02C09J11/04C09J11/06C09J11/08C08F220/06C08G63/20
CPCC08F220/06C08G63/20C08K2003/2241C08K2201/011C08L2205/03C08L2205/04C09J11/04C09J11/06C09J11/08C09J133/02C08L67/02C08K13/02C08K3/041C08K3/22
Inventor 周建兵
Owner 周建兵
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