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Preparation method of aldehyde-free adhesive and application of aldehyde-free adhesive

A technology of adhesives and reactors, which is applied in the field of preparation of formaldehyde-free adhesives, can solve problems such as slab loosening, and achieve the effects of good bonding force, good water resistance, and high bonding strength

Inactive Publication Date: 2018-09-07
广东始兴县华洲木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are fine materials on the surface of the particle board. Ordinary urea-formaldehyde glue has initial tackiness. After the slab is pre-pressed, it has a certain initial strength. The glued slabs will fall apart, making it impossible to enter the press, so it is of great significance to develop an adhesive with no formaldehyde and initial tack

Method used

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Embodiment Construction

[0012] Below in conjunction with embodiment the present invention is further described.

[0013] A formaldehyde-free adhesive, its components and their weight percentages are: component A 80%, component B 20%, wherein the components in component A include polyvinyl alcohol, xanthan gum, vinegar-acrylic emulsion, starch and vegetable protein , The components in component B include DBP, DOP and MDI.

[0014] A kind of preparation method of formaldehyde-free adhesive, its preparation step is:

[0015] 1. Preparation of component A: Add the required water to the reaction kettle, then add the required polyvinyl alcohol, xanthan gum, vinegar-acrylic emulsion, etc. into the reaction kettle in turn, heat to the specified temperature and stir for 0.5h, after cooling Then add the required starch and vegetable protein and stir again to adjust the pH value to 7.5-8.0. After cooling and stirring, discharge the material and seal it for storage;

[0016] 2. Make component B: first put the ...

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Abstract

The invention relates to an aldehyde-free adhesive. The aldehyde-free adhesive comprises the following components in percentage by weight: 80% of component A and 20% of component B, wherein the component A comprises the following ingredients in percentage by weight: 30% of polyvinyl alcohol, 30% of xanthan gum, 30% of vinyl acetate-acrylic emulsion, 5% of starch and 5% of plant protein, and the component B comprises the following ingredients in percentage by weight: 40% of DBP, 40% of DOP and 20% of MDI. A bonded artificial sheet material is high in bonding strength, good in water resistance and free of off odors, is non-toxic and pollution-free, is free of formaldehyde pollution of commonly-used adhesives, is applicable to continuous production of shaving boards and medium-density fiberboards and has the characteristics of good initial viscosity and thermosetting property, good adhesion with wood, zero formaldehyde and the like.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and relates to a preparation method and application of a formaldehyde-free adhesive that can be cured synchronously with MDI. Background technique [0002] Most of the adhesives used in the production of wood-based panels are urea-formaldehyde resin glue, phenolic resin glue and melamine glue. The common feature of these kinds of adhesives is that they all use formaldehyde to react with urea or phenol or melamine, resulting in the final glue containing formaldehyde. With the improvement of living standards, people's awareness and understanding of the hazards of formaldehyde are becoming more and more profound. In a room where formaldehyde exceeds the standard, if it is mild poisoning, the specific manifestations are conjunctival congestion, hoarse voice, difficulty breathing and heavy breathing. Another specific symptom of mild formaldehyde poisoning is throat edema of the first to second deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J105/00C09J131/04C09J103/02C09J189/00C09J11/06C09J11/08
CPCC09J175/04C08K2201/014C08L2205/035C09J11/06C09J11/08C08L5/00C08L31/04C08L3/02C08L89/00C08K5/12
Inventor 林卫东张凤岚谭锋明颜隆坤陈耀平陈瑞建张志文农平海刘国强
Owner 广东始兴县华洲木业有限公司
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