White emulsion adhesive and preparation method thereof

An adhesive, white latex technology, applied in the direction of adhesive additives, monocarboxylic acid ester copolymer adhesives, adhesive types, etc., can solve the problems of easy freezing, large equipment investment, poor water resistance and moisture resistance, etc. Achieve high tensile and shear strength, low cold junction temperature and good heat resistance

Inactive Publication Date: 2017-08-18
龚彩萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The so-called white latex is polyvinyl acetate emulsion. Due to the complicated preparation and operation process, large investment in equipment, and the high price of vinyl acetate monomer, the production cost of white latex is relatively high.
Its more obvious disadvantages are poor water resistance and moisture resistance, easy to absorb moisture in humid air, creep phenomenon will occur when used at high temperature, and the bonding strength will decrease. It is easy to freeze when stored below -5°C, which will damage the emulsion.

Method used

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  • White emulsion adhesive and preparation method thereof
  • White emulsion adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] White latex adhesive, comprising 400 parts of polyvinyl alcohol, 8 parts of hydrochloric acid, 50 parts of sodium tripolyphosphate, 9 parts of liquid caustic soda, 13 parts of emulsifier, 15 parts of dibutyl phthalate, 460 parts of polyvinyl acetate by weight Parts, 250 parts of fillers, 3.5 parts of triethanolamine oleate.

[0016] Among them, the emulsifier is OP-10 or TX-10; the filler is talcum powder, titanium dioxide or lithopone.

[0017] The preparation method of white latex adhesive of the present invention: comprise the following steps:

[0018] Step 1: Dissolve polyvinyl alcohol in water at 90°C, adjust the pH value to 2.5 with hydrochloric acid, keep the temperature at 90°C, add sodium tripolyphosphate under stirring, react for 1 hour, cool down to below 50°C, add liquid Alkali to adjust the pH to 7;

[0019] Step 2: Under stirring, keep the temperature at 50°C, add emulsifier and dibutyl phthalate, keep warm at 45°C for 1h and stir, then cool to room temp...

Embodiment 2

[0023] White latex adhesive, comprising 330 parts of polyvinyl alcohol, 7 parts of hydrochloric acid, 45 parts of sodium tripolyphosphate, 7.5 parts of liquid caustic soda, 13 parts of emulsifier, 14 parts of dibutyl phthalate, 500 parts of polyvinyl acetate by weight part, 300 parts of filler, 2 parts of triethanolamine oleate.

[0024] Among them, the emulsifier is OP-10 or TX-10; the filler is talcum powder, titanium dioxide or lithopone.

[0025] The preparation method of white latex adhesive of the present invention: comprise the following steps:

[0026] Step 1: Dissolve polyvinyl alcohol in water at 95°C, adjust the pH value to 2 with hydrochloric acid, keep the temperature at 95°C, add sodium tripolyphosphate under stirring, react for 1 hour, cool down to below 50°C, add liquid Alkali to adjust the pH to 7.2;

[0027] Step 2: Under stirring, keep the temperature at 40°C, add emulsifier and dibutyl phthalate, keep warm at 40°C for 1 hour and stir, then cool to room te...

Embodiment 3

[0031] White latex adhesive, comprising 380 parts of polyvinyl alcohol, 7 parts of hydrochloric acid, 35 parts of sodium tripolyphosphate, 8.5 parts of liquid caustic soda, 14 parts of emulsifier, 17 parts of dibutyl phthalate, 490 parts of polyvinyl acetate by weight Parts, 280 parts of fillers, 3 parts of triethanolamine oleate.

[0032] Among them, the emulsifier is OP-10 or TX-10; the filler is talcum powder, titanium dioxide or lithopone.

[0033] The preparation method of white latex adhesive of the present invention: comprise the following steps:

[0034] Step 1: Dissolve polyvinyl alcohol in water at 92°C, adjust the pH value to 2-3 with hydrochloric acid, keep the temperature at 92°C, add sodium tripolyphosphate under stirring, react for 1 hour, cool down to below 50°C, Add liquid caustic soda to adjust the pH value to 6.5;

[0035] Step 2: Under stirring, keep the temperature at 45°C, add emulsifier and dibutyl phthalate, keep warm at 45°C for 1h and stir, then coo...

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Abstract

The invention discloses a white emulsion adhesive and a preparation method thereof. The white emulsion adhesive comprises the following components in parts by weight: polyvinyl alcohol 300-400 parts, hydrochloric acid 5-8 parts, sodium tripolyphosphate 30-50 parts, liquid caustic soda 7-9 parts, an emulsifying agent 12-16 parts, dibutyl phthalate 10-20 parts, polyvinyl acetate 450-500 parts, a filler 200-300 parts and triethanolamine oleate 2-4 parts. Therefore, the adhesive is low in cold-sintering temperature, good in antifreezing property and high in tensile and shearing resistance strength; the adhesive has a waterproof property and cannot fail; the heat resistance is good, and the adhesive can resist high temperature above 100 DEG C; and the cost is low, and the white emulsion adhesive can be produced under the condition of a reactor exists or does not exist.

Description

technical field [0001] The invention relates to adhesives, in particular to a white latex adhesive and a preparation method thereof. Background technique [0002] White latex is currently one of the most widely used and used adhesive varieties. It is obtained by emulsion polymerization with water as the dispersion medium, and is a water-based environmentally friendly adhesive. It is mainly used in wood processing, furniture assembly, cigarette joints, architectural decoration, fabric bonding, product processing, printing and binding, handicraft manufacturing, leather processing, label fixing, tile bonding, etc. It is an environmentally friendly adhesive . [0003] The so-called white latex is polyvinyl acetate emulsion. Due to the complicated preparation and operation process, large investment in equipment, and the high price of vinyl acetate monomer, the production cost of white latex is relatively high. Its more obvious disadvantages are poor water resistance and moistu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J129/04C09J11/04C09J11/06
CPCC08K2003/2241C08K2003/3036C08K2003/3045C08L2201/08C09J11/04C09J11/06C09J129/04C09J131/04C08L29/04C08K13/02C08K5/12C08K3/34C08K3/22C08K3/30
Inventor 龚彩萍
Owner 龚彩萍
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