Preparation method of energy-saving, environment-protecting and sag-resistant water-based instant adhesive

An energy-saving, environmentally friendly, water-based technology, applied in adhesive types, climate sustainability, sustainable manufacturing/processing, etc., can solve problems such as poor flow resistance, glue sticking, poor water resistance, etc. High bonding strength and good flow resistance

Active Publication Date: 2010-10-06
JIANGSU HEISONGLIN ADHESIVE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ordinary water-based glue uses traditional polyvinyl alcohol as a protective colloid and uses some additives containing carcinogens, such as a waterproof glue disclosed in Patent No. 200410009391.X, polyvinyl alcohol is used as a protective colloid to protect the sheet Since the polyvinyl alcohol protective colloid does not contain active groups, it does not undergo adsorption or grafting reactions with the monomer polymer, and only forms a protective layer on the surface of the polymer particles, resulting in the viscosity and bonding strength of the monomer polymer. Low, its flow resistance, low temperature resistance, and water resistance are poor, especially in the construction and use process, there are the following defects: (1) Due to the low viscosity, the phenomenon of dripping and hanging glue is serious during the construction process, resulting in considerable waste and Pollution of the environment; (2) During the gluing and pressing process of the workpiece, due to the poor flow resistance of the colloid, the glue is easily squeezed and overflowed after pressing, which affects the amount of gluing on the workpiece, resulting in low bonding strength and It is easy to contaminate the materials to be bonded, and it is troublesome to clean the glue dropping and hanging at the same time, which takes a lot of labor and materials, which seriously affects the appearance and quality of the finished product; (3) ordinary water-based glue uses traditional polyvinyl alcohol as the protective colloid, which has poor water resistance. Adhesive materials are prone to degumming and cracking when exposed to moisture; (4) Ordinary water-based adhesives use additives containing phthalic anhydride and APEO harmful carcinogens as additives, which have health and safety defects
During the monomer polymerization process, the protective colloid protects the monomer polymer unevenly and insufficiently, especially in the later stage of the polymerization reaction, because the protective colloid is not sufficient, the polymers are easy to merge and condense, resulting in poor stability and water resistance of the produced colloid. Poor, low bonding strength, poor flow resistance

Method used

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  • Preparation method of energy-saving, environment-protecting and sag-resistant water-based instant adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 100kg of deionized water into the reaction kettle, start stirring, control the stirring speed at 70 rpm, add 6kg of acetoacetylated polyvinyl alcohol (PVOH) while stirring, heat up to 88°C after confirming the dispersion After 2 hours, after completely dissolving, cool down to 40°C to form a protective colloid, take out 63kg of the protective colloid, and pump it into the dropping tank for standby;

[0021] (2) 0.2kg ammonium persulfate is diluted with water in a ratio of 1:20 to form an ammonium persulfate solution for subsequent use;

[0022] (3) In the stirring state, the stirring rate is controlled at 60 rpm, and 0.5 kg of fatty alcohol polyoxyethylene ether (AO-9) and 10 kg of vinyl acetate are added to the above reaction kettle, and the temperature is raised to 58 °C after stirring for 10 minutes. , add 1.2 kg of ammonium persulfate solution, react naturally for 1 hour, and the temperature rises to 75°C-85°C to initiate polymerization to form a seed emulsi...

Embodiment 2

[0026] (1) Add 100kg of deionized water into the reaction kettle, start stirring, control the stirring speed at 65 rpm, add 8kg of acetoacetylated polyvinyl alcohol (PVOH) while stirring, heat up to 90°C after confirming the dispersion After 1 hour, after completely dissolving, cool down to 50°C to form a protective colloid, take out 65kg of the protective colloid, and pump it into the dripping tank through a diaphragm pump;

[0027] (2) 0.3kg ammonium persulfate is diluted with water in a ratio of 1:20 to form an ammonium persulfate solution for subsequent use;

[0028] (3) In the stirring state, the stirring speed is controlled at 55 rpm, and 0.1 kg of emulsifier (O) and 18 kg of vinyl acetate are added to the reaction kettle, and the temperature is raised to 60 ° C after stirring for 10 minutes, and ammonium persulfate solution 2.4 kg, natural reaction for 1.5 hours, the temperature rises to 75°C-85°C, and the polymerization is initiated to form a seed emulsion;

[0029] (...

Embodiment 3

[0032] (1) Add 100kg of deionized water into the reactor, start stirring, control the stirring speed at 75 rpm, add 15kg of acetoacetylated polyvinyl alcohol (PVOH) while stirring, heat up to 85°C after confirming the dispersion After 3 hours, after completely dissolving, cool down to 45°C to form a protective colloid, take out 69kg of the protective colloid and send it into the dropping tank through a diaphragm pump;

[0033] (2) the ammonium persulfate of 0.1kg is diluted with water in a ratio of 1: 20 to form an ammonium persulfate solution for subsequent use;

[0034] (3) In the stirring state, the stirring speed is controlled at 65 rpm, add 0.8kg of emulsifier (EFS-470) and 6kg of vinyl acetate into the above reaction kettle, stir for 10 minutes and then raise the temperature to 65°C, add persulfuric acid Ammonium solution 1kg, natural reaction for 1 hour, the temperature rises to 75°C-85°C, triggers polymerization to form seed emulsion;

[0035] (4) Stirring speed is cont...

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Abstract

The invention relates to a preparation method of energy-saving, environment-protecting and sag-resistant water-based instant adhesive. The adhesive is widely applied in self-adhesion or cross-adhesion in the furniture, handicrafts, car interiors and other industries, and is prepared with the following raw materials of certain parts by weight: acetylated polyvinyl alcohol, vinyl acetate, plasticizer, nano-montmorillonite soil, emulsifier, initiator and the like. Instead of the method of preparing the existing product that the common polyvinyl alcohol is filled once into the reactor as the protective colloid, the preparation of the invention adopts the method of dropping the monomers and the initiator through two ports, the acetylated polyvinyl alcohol is filled in batches as the protective colloid, and the monomers, the initiator and the protective colloid are dropped simultaneously through a three-port dropping device, thereby improving the water resistance, stability, adhesive strength and sag resistance; and the reaction rate is controlled and the nano-montmorillonite soil, the environmental protection type plasticizer, the environmental protection type emulsifier and the like are added during preparation, thereby improving the adhesive property, environmental performance and sag resistance.

Description

technical field [0001] The invention relates to a method for preparing an adhesive, in particular to the preparation of an energy-saving, environmental-friendly, and anti-dripping water-based quick-drying adhesive, which is widely used in self-adhesive and cross-bonding in industries such as precious furniture, high-grade craft products, and automotive interiors Wood, leather, cement, cloth, hemp, bamboo, grass, stone, paper, etc. Background technique [0002] At present, ordinary water-based adhesives are widely used in valuable furniture, high-end craft products, automotive interiors and other industries in China. Because ordinary water-based glue uses traditional polyvinyl alcohol as a protective colloid and uses some additives containing carcinogens, such as a waterproof glue disclosed in Patent No. 200410009391.X, polyvinyl alcohol is used as a protective colloid to protect the sheet Since the polyvinyl alcohol protective colloid does not contain active groups, it does...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J11/04
CPCY02P20/10
Inventor 刘鹏凯殷萍丁永柏王向阳
Owner JIANGSU HEISONGLIN ADHESIVE FACTORY
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