Preparation method and use of aqueous polymer/isocyanate adhesive

A water-based polymer and isocyanate technology, applied in the direction of polymer adhesive additives, adhesives, adhesive additives, etc., can solve problems such as excellent bonding strength, impact on industrialized food safety, and difficulty in achieving it, and achieve bonding strength The effect of increasing the added value of products and reducing the cost of raw materials

Inactive Publication Date: 2011-01-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention patent with the application number CN200910031280.1 discloses a method for preparing an adhesive for wood processing; its preparation is divided into three stages, the first stage consists of oligomer polyols, hydrophilic monomers, isocyanates, Modified monomers are gradually polymerized and radically polymerized to form a modified polyurethane prepolymer; the second stage is the dispersion of the modified polyurethane prepolymer in water after neutralization and salt formation; the third stage is to form a water-based polymer after adding a chain extender. Polyurethane emulsion; since the highly active isocyanate group (-N=C=O) in the adhesive has reacted, it is difficult to achieve excellent bonding strength when applied to wood bonding
The invention patent with the application number CN200810051264.4 discloses a wood adhesive and its preparation method. The adhesive uses starch and polyvinyl alcohol as the main raw materials, and is grafted with polyvinyl alcohol after starch gelatinization and oxidation. The adhesive main agent is prepared, and then modified by adding water-based SBS emulsion or melamine-formaldehyde resin; since the adhesive uses starch as one of the main raw materials, its industrialization may have an impact on food security

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of component A

[0035] Crumble and dry the recovered PET until the moisture mass percentage is below 0.5%, sieve out solids such as sand, stones, metals, etc.; add 100kg of recovered broken PET and 5kg of diethanolamine to the reactor, and turn on the agitator, use the output power Microwave radiation of 500W for 4min causes alcoholysis of PET; 15kg of caprolactam is added to the reactor, and microwave radiation with output power of 500W is used for 4min; 165kg of aqueous solution of glacial acetic acid is added to the reactor, and the pH is adjusted to 4.0, so that the resin is dispersed PET water-based polymer emulsion, that is, component A, is cooled to room temperature and discharged.

[0036] (2) Preparation of component B

[0037] Blend toluene diisocyanate and castor oil at a mass ratio of 100:50, heat at 80-90°C, periodically take the reactants and carry out chemical titration until the percentage of isocyanate groups (NCO%) is constant, cool, an...

Embodiment 2

[0040] (1) Preparation of component A

[0041] Crush the recovered PET, dry the moisture to below 0.5% by mass, and sieve out solids such as sand, stones, metals, etc.; add 100 kg of recovered broken PET and 7 kg of diethanolamine to the reactor, and turn on the agitator, and use the output Microwave radiation with a power of 500W for 8 minutes causes alcoholysis of PET; add 20 kg of caprolactam to the reactor, and irradiate with a microwave with an output power of 500 W for 8 minutes; add 170 kg of glacial acetic acid aqueous solution to the reaction kettle, adjust the pH to 4.0, and disperse the resin The obtained PET water-based polymer emulsion, that is, component A, was cooled to room temperature and discharged.

[0042] (2) Preparation of component B

[0043] Blend toluene diisocyanate and castor oil in a mass ratio of 100:75, heat at 70-80°C, periodically take the reactants for infrared spectrum detection, until the percentage of isocyanate groups (NCO%) is constant, c...

Embodiment 3

[0046] (1) Preparation of component A

[0047] Crush the recovered PET, dry the moisture to below 0.5% by mass, sieve out solids such as sand, stones, metals, etc.; add 100 kg of recovered broken PET and 6 kg of diethanolamine to the reactor, and turn on the agitator, and use the output Microwave radiation with a power of 500W for 6 minutes causes alcoholysis of PET; add 17 kg of caprolactam to the reactor, and irradiate it with a microwave with an output power of 500 W for 6 minutes; The obtained PET water-based polymer emulsion, that is, component A, was cooled to room temperature and discharged.

[0048] (2) Preparation of component B

[0049] Blend toluene diisocyanate and castor oil in a mass ratio of 100:65, heat at 75 to 85°C, periodically take the reactants for chemical titration, until the percentage of isocyanate groups (NCO%) is constant, cool, and discharge, The isocyanate-terminated polyurethane prepolymer is B component.

[0050] (3) Components A and B are pac...

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PUM

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Abstract

The invention relates to a preparation method and use of an aqueous polymer/isocyanate adhesive, which belong to the technical field of chemical adhesives. In the invention, recycled polyethylene terephthalate (PET), diethanol amine, caprolactam and aqueous solution of glacial acetic acid are used to prepare a PET water-based polymer; toluene diisocynate and castor oil are used to prepare an isocyanate-terminated polyurethane prepolymer; and when used, PET aqueous polymer emulsion and the isocyanate-terminated polyurethane prepolymer are mixed at room temperature to obtain the aqueous polymer/isocyanate adhesive. The aqueous polymer/isocyanate adhesive is used for adhering wood.

Description

technical field [0001] The invention relates to a preparation method and application of a water-based polymer / isocyanate adhesive, in particular to a preparation method and application of a water-based polymer / isocyanate wood adhesive, and belongs to the technical field of chemical adhesives. Background technique [0002] Water-based polymer / isocyanate adhesive is a two-component ready-to-mix system with water-based polymer emulsion as the main agent and isocyanate as the crosslinking agent. It is compatible with water-based urea-formaldehyde resin, phenolic resin, and melamine- Compared with formaldehyde resin, this adhesive has the following characteristics: ①It can react with wood raw materials and water, so the wood fiber substrate can be compounded at a higher water content, the pressing time is shortened, and the drying energy is saved; ② It can be cured at room temperature or heated; ③ It is suitable for a wide range of raw materials, and can be used for bonding wood,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C09J11/08C08G18/67
Inventor 王志玲张玉敏轿强
Owner UNIV OF JINAN
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