Aqueous polymer-isocyanate adhesive and preparation method thereof

A water-based polymer and isocyanate technology, applied in the direction of non-polymer adhesive additives, ester copolymer adhesives, adhesive types, etc., can solve the problem of weakening the reaction between hydroxyl groups and wood surface hydroxyl groups and crosslinking, and increasing Problems such as the amount of crosslinking agent and the decrease of bonding strength can be achieved to strengthen the reaction and crosslinking effect, reduce the cost and price of use, and ensure the effect of bonding strength

Inactive Publication Date: 2013-02-20
青州市天源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main agent of the water-based polymer-isocyanate adhesive used in production is polyvinyl alcohol (PVA) aqueous solution, but due to the limited solubility, the dissolution effect of polyvinyl alcohol in a small amount of water is poor, and insoluble small particles will be produced. A large amount of water will reduce the effective components of the adhesive; at the same time, the crosslinking agent component isocyanate of the water-based polymer-isocyanate adhesive currently used in the production and use of people has poor compatibility with the hydroxyl polymer in the main agent, resulting in the isocyanate reacting with water. The large amount will weaken the reaction and crosslinking effect of isocyanate on the hydroxyl groups on the polymer and the hydroxyl groups on the wood surface, and also cause more bubbles in the glue layer due to the reaction of too many isocyanate groups with water, which will reduce the bonding strength. It affects the overall bonding effect on wood, and in order to achieve higher bonding strength, it is necessary to increase the amount of crosslinking agent, which increases the use cost and price

Method used

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  • Aqueous polymer-isocyanate adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] As shown in the accompanying drawing, a water-based polymer-isocyanate adhesive includes a main agent and a crosslinking agent, wherein the main agent is made of the following raw materials in parts by mass:

[0032] 45 parts by mass of the mixed solution of polyvinyl alcohol, deionized water and ethanol

[0033] 45 parts by mass of polyacrylate emulsion;

[0034] The crosslinking agent is made of polymethylene polyphenyl polyisocyanate and dioctyl phthalate in a mass ratio of 1:1;

[0035] The mass ratio of main agent and crosslinking agent is 100:15.

[0036] The mass ratio of polyvinyl alcohol, deionized water and ethanol in the mixed solution of polyvinyl alcohol, deionized water and ethanol is polyvinyl alcohol: deionized water: ethanol is 20:62.8:17.2.

[0037] The preparation method of the water-based polymer-isocyanate adhesive comprises steps:

[0038] (1) In parts by mass, mix polyvinyl alcohol, deionized water and ethanol according to the mass ratio of pol...

Embodiment 2

[0043] As shown in the accompanying drawing, a water-based polymer-isocyanate adhesive includes a main agent and a crosslinking agent, wherein the main agent is made of the following raw materials in parts by mass:

[0044] 60 parts by mass of a mixed solution of polyvinyl alcohol, deionized water and ethanol

[0045]30 parts by mass of polyacrylate emulsion;

[0046] The crosslinking agent is made of polymethylene polyphenyl polyisocyanate and dioctyl phthalate in a mass ratio of 1:1;

[0047] The mass ratio of main agent and crosslinking agent is 100:15.

[0048] The mass ratio of polyvinyl alcohol, deionized water and ethanol in the mixed solution of polyvinyl alcohol, deionized water and ethanol is polyvinyl alcohol: deionized water: ethanol is 20:62.8:17.2.

[0049] The preparation method of the water-based polymer-isocyanate adhesive comprises steps:

[0050] (1) In parts by mass, mix polyvinyl alcohol, deionized water and ethanol according to the mass ratio of polyvi...

Embodiment 3

[0055] As shown in the accompanying drawing, a water-based polymer-isocyanate adhesive includes a main agent and a crosslinking agent, wherein the main agent is made of the following raw materials in parts by mass:

[0056] 50 parts by mass of a mixed solution of polyvinyl alcohol, deionized water and ethanol

[0057] 40 parts by mass of polyacrylate emulsion;

[0058] The crosslinking agent is made of polymethylene polyphenyl polyisocyanate and dioctyl phthalate in a mass ratio of 1:1;

[0059] The mass ratio of main agent and crosslinking agent is 100:15.

[0060] The mass ratio of polyvinyl alcohol, deionized water and ethanol in the mixed solution of polyvinyl alcohol, deionized water and ethanol is polyvinyl alcohol: deionized water: ethanol is 20:62.8:17.2.

[0061] The preparation method of the water-based polymer-isocyanate adhesive comprises steps:

[0062] (1) In parts by mass, mix polyvinyl alcohol, deionized water and ethanol according to the mass ratio of polyv...

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PUM

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Abstract

The present invention discloses a preparation method of an aqueous polymer-isocyanate adhesive. The aqueous polymer-isocyanate adhesive comprises a main agent and a cross-linking agent, wherein the main agent comprises polyvinyl alcohol, deionized water, ethanol and a polyacrylate emulsion, the cross-linking agent comprises polyaryl polymethylene isocyanate and dioctyl phthalate, and the main agent components and the cross-linking agent components are respectively subjected to dissolving mixing to prepare the aqueous polymer-isocyanate adhesive. According to the present invention, solubility of polyvinyl alcohol in water is increased, compatibility of isocyanate and a hydroxyl polymer is increased, use cost and price are reduced, the adhesive does not contain free phenol and free aldehyde, and provides a bonding strength of 1.71-2.59 MPa for wood when use, and a working life is more than 40 min.

Description

technical field [0001] The invention relates to adhesive technology, in particular to a water-based polymer-isocyanate adhesive and a preparation method. Background technique [0002] At present, in order to ensure people's health and safety, many countries, including my country, have imposed strict restrictions on the amount of formaldehyde and phenol released from various materials such as furniture and residential coatings, and formulated strict binding mandatory standards. , which limits the scope of use of amino resin adhesives. Traditional urea-formaldehyde resin adhesives and phenolic resin adhesives no longer meet people's requirements for product quality and the environment. In this regard, people's eyes are gradually turning to environmentally friendly adhesives, and the development and use of non-toxic, low-toxic, and efficient wood processing synthetic resin adhesives is a hot topic that people generally pay attention to. [0003] Two-component water-based polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J133/04C09J11/06
Inventor 吴蓁张立亭袁宝忠
Owner 青州市天源化工有限公司
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