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Preparation method of hydrophilic bookbinding adhesive for two-side offset paper

A hydrophilic, double-adhesive paper technology, applied in the direction of adhesives, adhesive additives, carboxyl rubber adhesives, etc., can solve the problems affecting paper quality, affecting paper forming, etc., reducing the demand for cationic charges, improving efficiency, Significant effect of bond strength

Inactive Publication Date: 2014-07-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a hydrophilic bookbinding adhesive for double offset paper, which is used to solve the problem that the existing adhesive for double offset paper affects paper quality or even paper forming in paper recycling. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 100 grams of succinic acid and 2 grams of octadecanoic acid, pass in nitrogen gas, mix uniformly by mechanical stirring, raise the temperature to 188 ° C, keep mechanical stirring, and evenly add 60 grams of 1-hydroxymethyl-2 in 22 minutes -Potassium hydroxy-ethanesulfonate, then raise the temperature to 198°C, add 1.5 g of ethylene glycol antimony, and evenly add 150 g of pentanediol dropwise within 40 min, and then raise the temperature to 208°C to continue the reaction for 20 minutes min, lower the temperature to 194°C, add 5 grams of carboxylated nitrile rubber, 3 grams of water-based tackifying resin, 2 grams of paraffin wax, 4 grams of talcum powder, and 0.5 grams of propyl gallate, mix and stir for 10 minutes to cool, and package.

[0026] The prepared adhesive has a bonding strength of 5.62MPa, a melt viscosity of 3.15 Pa s, a softening point of 87.1°C, a brittleness temperature of -3.2°C, and a hardness of 82.7; the solubility of the aqueous solution at ro...

Embodiment 2

[0028] Add 100 grams of succinic acid and 2 grams of octadecanoic acid, pass through nitrogen, mix uniformly by mechanical stirring, heat up to 194 ° C, keep mechanical stirring, and evenly add 50 grams of 1-hydroxymethyl- 2-Hydroxy-ethanesulfonate potassium, then raise the temperature to 200°C, add 1.5 grams of ethylene glycol antimony, add 140 grams of pentylene glycol dropwise within 40 minutes, and then raise the temperature to 208°C to continue the reaction After 15 minutes, lower the temperature to 194°C, add 7 grams of carboxylated nitrile rubber, 4 grams of water-based tackifying resin, 1 gram of paraffin wax, 3 grams of talcum powder, and 0.8 grams of propyl gallate, mix and stir for 10 minutes to cool, and package.

[0029] The prepared adhesive had a bond strength of 5.54 MPa, a melt viscosity of 3.42 Pa s, a softening point of 89.5°C, a brittleness temperature of -3.8°C, a hardness of 86.1, and a solubility of 99.0% in aqueous solution at room temperature (<3h). DC...

Embodiment 3

[0031] Add 80 grams of succinic acid and 2 grams of octadecanoic acid, pass through nitrogen, mix uniformly by mechanical stirring, heat up to 190 ° C, keep mechanical stirring, and drop 55 grams of 1-hydroxymethyl- 2-Hydroxy-ethanesulfonate potassium, then raise the temperature to 201°C, add 1.5 g of ethylene glycol antimony, add 125 g of pentanediol dropwise evenly in 40 minutes, raise the temperature to 208°C after the dropwise addition of pentanediol to continue the reaction for 18 min, lower the temperature to 194°C, add 8 grams of carboxylated nitrile rubber, 4 grams of water-based tackifying resin, 3 grams of paraffin, 6 grams of talcum powder, and 0.8 grams of propyl gallate, mix and stir for 10 minutes to cool, and package.

[0032] The prepared adhesive has a bonding strength of 5.39 MPa, a melt viscosity of 4.16 Pa s, a softening point of 91.3°C, a brittleness temperature of -4.2°C, and a hardness of 84.6; the solubility of the aqueous solution at room temperature ...

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Abstract

The invention discloses a preparation method of a hydrophilic bookbinding adhesive for two-side offset paper, which is used for solving the problem that the quality of paper and even the formation of the paper are affected in reuse of the paper of the existing adhesive for two-side offset paper. According to the preparation method of the hydrophilic bookbinding adhesive for the two-side offset paper, disclosed by the invention, sulfo-groups are introduced on monomers for alkyd polycondensation, and the hydrophilicity of a polycondensation product is greatly increased. Compared with a commonly used adhesive in the prior art, the binding strength is obviously improved, the dissolution in the reusing process of the paper and the demand quantity of colloidal substances (DCS) and cationic charges are significantly reduced, waste paper is easy to break up, the reusing difficulty and the cost are greatly reduced, and the efficiency of a wet part of a paper machine is significantly improved.

Description

technical field [0001] The invention relates to the technical field of bookbinding adhesives, in particular to a preparation method of a hydrophilic bookbinding adhesive for offset paper. Background technique [0002] Hot-melt adhesive for double-adhesive paper book wireless binding is one of the earliest hot-melt adhesive varieties developed in China. Its main features are high flatness when the book is opened; The amount of glue is small, cold-resistant, heat-resistant, once cured, it will not soften, and can be used in a wide temperature range. Polyether polyol is used as the basic raw material, supplemented with various additives and polyisocyanate to polymerize to obtain reactive polyurethane hot melt adhesive. However, due to the limitation of the price of books (especially textbooks for primary and secondary school students), there are many problems in the quality of glue used in this field, such as low bonding strength, brittleness at low temperature, short life, et...

Claims

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Application Information

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IPC IPC(8): C09J167/02C09J113/00C09J11/04C09J11/06C08G63/688
Inventor 董翠华张福龙庞志强
Owner QILU UNIV OF TECH
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