Preparation method for sealing adhesive for paper packaging

A sealing adhesive and packaging technology, applied in the field of sealing adhesive, can solve the problems of unfavorable processing, short initial bonding time, low viscosity of sealing adhesive, etc., and achieve the effect of strong adhesion and excellent performance

Inactive Publication Date: 2016-07-13
SUZHOU DINGLI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing sealing glue has low viscosity, and the initial sticking time is too short, which is not conducive to processing and other problems

Method used

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  • Preparation method for sealing adhesive for paper packaging
  • Preparation method for sealing adhesive for paper packaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a sealant for paper product packaging, comprising the following steps: in parts by weight, 35 parts of modified epoxy resin, 45 parts of ethylene-vinyl acetate copolymer, 10 parts of polypropylene, polybutadiene 12 parts, 4 parts of ethylene glycol glycidyl ether, 3 parts of curing agent, 4 parts of curing accelerator, 4 parts of organic solvent, 3 parts of antioxidant, after mixing evenly, transfer to the three-roll machine, grind 2 times, and filter through the filter , vacuum degassing for 15 minutes, to obtain;

[0021] The preparation method of the described modified epoxy resin is as follows: by weight, 10 parts of bisphenol A, 4 parts of m-trifluoromethylphenol, 12 parts of epichlorohydrin and 15 parts of hydroxymalonic acid and epichlorohydrin Mix 90 parts of the alkali metal hydroxide aqueous solution evenly, heat to 50°C, and react for 8 hours. After the reaction, wash with water and dry to obtain the modified epoxy resin.

Embodiment 2

[0023] A method for preparing a sealant for paper product packaging, comprising the following steps: by weight, 40 parts of modified epoxy resin, 45 parts of ethylene-vinyl acetate copolymer, 10 parts of polypropylene, polybutadiene 13 parts, 5 parts of ethylene glycol glycidyl ether, 4 parts of curing agent, 4 parts of curing accelerator, 6 parts of organic solvent, and 3 parts of antioxidant, after mixing evenly, transfer to a three-roll machine, grind 2 times, and filter , vacuum degassing for 16 minutes, to obtain;

[0024] The preparation method of the described modified epoxy resin is as follows: by weight, 12 parts of bisphenol A, 4 parts of m-trifluoromethylphenol, 13 parts of epichlorohydrin and 20 parts of hydroxymalonic acid and epichlorohydrin Mix 100 parts of the aqueous solution of alkali metal hydroxide evenly, heat to 60°C, and react for 9 hours. After the reaction, wash with water and dry to obtain the modified epoxy resin.

Embodiment 3

[0026] A method for preparing a sealant for paper product packaging, comprising the following steps: in parts by weight, 40 parts of modified epoxy resin, 50 parts of ethylene-vinyl acetate copolymer, 11 parts of polypropylene, polybutadiene 14 parts, 6 parts of ethylene glycol glycidyl ether, 5 parts of curing agent, 5 parts of curing accelerator, 9 parts of organic solvent, and 3 parts of antioxidant, after mixing evenly, transfer to a three-roll machine, grind 2 times, and filter through a filter , evacuated and degassed for 18 minutes to obtain;

[0027] The preparation method of the described modified epoxy resin is as follows: by weight, 15 parts of bisphenol A, 5 parts of m-trifluoromethylphenol, 14 parts of epichlorohydrin and 25 parts of hydroxymalonic acid and epichlorohydrin Mix 120 parts of alkali metal hydroxide aqueous solution evenly, heat to 70°C, and react for 10 hours. After the reaction, wash with water and dry to obtain the modified epoxy resin.

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Abstract

The invention provides a preparation method for a sealing adhesive for paper packaging.The method comprises the following steps that modified epoxide resin, an ethylene-vinyl acetate copolymer, polypropylene, polybutadiene, ethylene glycol glycidyl ether, a curing agent, a curing accelerator, an organic solvent and an antioxidant are mixed to be uniform and then transferred into a three-roller machine, grinding is performed for 2-3 times, filtering is performed through a filter net, and vacuum defoamation is performed for 15-20 min to obtain the sealing adhesive.The preparation method for modified epoxide resin comprises the steps that bisphenol A, m-trifluoromethylphenol, epoxy chloropropane and tartronic acid are mixed with an epichlorohydrin and alkali metal hydroxide water solution to be uniform, a heating reaction is performed, and washing and drying are performed after the reaction is finished to obtain modified epoxide resin.The sealing adhesive obtained through the preparation method is good in adhesiveness, short in initial adhesive time and good in adhesive stripping strength, moisture passing rate and the like, is high in adhesive force with paper and meets the special requirement for paper packaging.

Description

technical field [0001] The invention relates to the field of sealing glue, in particular to a preparation method of sealing glue used for paper product packaging. Background technique [0002] The packaging industry is one of the largest markets for adhesives. As the market's requirements for product packaging are getting higher and higher, all kinds of beautifully printed packaging products have put forward higher requirements for the adhesives used, which has also promoted the rapid development of packaging adhesives. [0003] Sealing glue is a one-component quick-drying water-based adhesive, non-toxic and non-polluting. Its products include hand glue and machine glue. Glue for lap molding. It is widely used in the bonding of cigarette boxes, wine boxes, shoe boxes, medicine boxes, health care boxes, food boxes, handbags, etc., as well as various paper, paper plastic, composite film paper, and glazing cartons in other related industries. [0004] The existing sealant ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J163/00C09J11/08C08G59/06
CPCC09J123/0853C08G59/063C08L2205/035C09J11/08C08L63/00C08L23/12C08L47/00
Inventor 顾建芳
Owner SUZHOU DINGLI PACKAGING
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