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Preparation method and application of polyether-polyester aqueous emulsion/isocyanate adhesive

An isocyanate and water emulsion technology, which is applied in the preparation of polyether-polyester water emulsion/isocyanate adhesive and the preparation of polyether-polyester water emulsion/isocyanate adhesive, can solve the problem of high cost and complicated processing technology, etc. problems, to achieve the effect of cost reduction, environmental pollution, high bonding strength and water resistance

Inactive Publication Date: 2013-09-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the crude glycerol phase separated by the transesterification reaction, the mass percentage of glycerol is less than 80%, and it also contains impurities such as methanol and saponified matter. The purification of crude glycerin generally includes: filtering, adding chemical additives, purification and distillation, etc., if necessary For use in cosmetics and other fields, further deodorization, bleaching, and ion exchange are required to eliminate trace substances in it. The treatment process is complicated and the cost is high.

Method used

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  • Preparation method and application of polyether-polyester aqueous emulsion/isocyanate adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of preparation method of polyether-polyester aqueous emulsion / isocyanate adhesive, carries out according to the following steps:

[0040] (1) Refining of crude glycerin

[0041] Add 10g of methanol with a low boiling point to 100g of crude glycerin, neutralize with hydrochloric acid, and centrifuge. The lower layer is used to prepare soap, and the upper layer is distilled under reduced pressure. The methanol obtained is recycled. Press distillation for 1 hour to obtain refined glycerol;

[0042] The crude glycerol comes from the crude glycerin phase of by-products separated during the transesterification of biodiesel; the raw material of biodiesel transesterification is catering waste oil;

[0043] (2) Waterborne polyester-polyether

[0044] Into a dry and clean flask, add 100g of refined glycerin, under stirring, add 50g of diethylene glycol, 10g of succinic anhydride, 0.01g of butyl titanate, heat to 80°C, keep warm for 1h, add 2,4-diaminobenzene Sulfonic acid...

Embodiment 2

[0047] A kind of preparation method of polyether-polyester aqueous emulsion / isocyanate adhesive, carries out according to the following steps:

[0048] (1) Refining of crude glycerin

[0049] Add 15g of acetone to 100g of crude glycerin, neutralize it with sulfuric acid, and centrifuge to separate it. The lower layer is used to prepare soap, and the upper layer is distilled under reduced pressure. The acetone obtained is recycled, and the temperature is raised to 105-110°C. Distilled under reduced pressure 1h, to obtain refined glycerol;

[0050] The crude glycerin is from the by-product crude glycerol phase separated during the biodiesel transesterification process, and the biodiesel transesterification raw material is castor oil;

[0051] (2) Waterborne polyester-polyether

[0052] Into a dry and clean flask, add 100g of refined glycerin, under stirring, add 100g of diethylene glycol, 20g of succinic anhydride, 0.15g of isopropyl titanate, heat to 100°C, keep warm for 0.5h...

Embodiment 3

[0055] A kind of preparation method of polyether-polyester aqueous emulsion / isocyanate adhesive, carries out according to the following steps:

[0056] (1) Refining of crude glycerin

[0057] Add 13g of methyl acetate to 100g of crude glycerin, then neutralize with hydrochloric acid, and centrifuge. The lower layer is used to prepare soap, and the upper layer is distilled under reduced pressure. The obtained methyl acetate is recycled and the temperature rises to 105-110°C , distilled under reduced pressure for 1 h to obtain refined glycerol;

[0058] The crude glycerin comes from the crude glycerol phase of by-products separated during the biodiesel transesterification process; the biodiesel transesterification raw material is recycled animal fats;

[0059] (2) Waterborne polyester-polyether

[0060] Into a dry and clean flask, add 100g of refined glycerin, under stirring, add 75g of diethylene glycol, 15g of succinic anhydride, 0.10g of isobutyl titanate, heat to 90°C, kee...

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Abstract

The invention relates to a preparation method and the application of a polyether-polyester aqueous emulsion / isocyanate adhesive, belonging to the technical field of the chemical adhesive. With the development of the industry of a regenerable biological energy source-biodiesel, the yield of the byproduct crude glycerine is also rapidly increased. By adopting the preparation method provided by the invention, the polyether-polyester aqueous emulsion / isocyanate adhesive is prepared by a chemical method by combining the byproduct crude glycerine separated in the biodiesel ester exchange process with diglycol, succinic anhydride, 2, 4-diaminobenzenesulfonic acid and isocyanate. The adhesive prepared by the preparation method is used for bonding wood.

Description

technical field [0001] The invention relates to a preparation method and application of a polyether-polyester aqueous emulsion / isocyanate adhesive, in particular to a preparation of a polyether-polyester aqueous emulsion / isocyanate adhesive using crude glycerin, a by-product of biodiesel, as a raw material The method and application belong 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. Compared with resin, phenolic resin, and melamine-formaldehyde resin, the adhesive: does not contain formaldehyde, and is green and environmentally friendly; it can react with both hydroxyl groups in wood raw materials and water at room temperature, so it can be cured at room temperature or heated Curing, the wood fiber substrate can be compounded at a higher water content, the pressing time is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/46C08G63/688C08G63/672
Inventor 王志玲杨小凤刘志莲杨秀利郑鲁沂
Owner UNIV OF JINAN