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Adhesive for woodworking flat pasting

An adhesive, flat sticking technology, applied in the directions of adhesives, adhesive additives, adhesive types, etc., can solve the problems of long curing time and unfavorable practical use, and achieve fast curing speed, good heat resistance, and stable peeling. the effect of strength

Inactive Publication Date: 2019-11-22
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the adhesive improves the problem of environmental pollution, its curing time is long, which is not conducive to practical use

Method used

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  • Adhesive for woodworking flat pasting
  • Adhesive for woodworking flat pasting
  • Adhesive for woodworking flat pasting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 300g of amorphous polyester polyol, 250g of liquid polyester polyol, 300g of polyadipate-1,4-butylene glycol ester diol, and 150g of polyurethane elastomer into the reaction equipment, heat to 120°C to start dehydration, Reduce the vacuum degree to below -0.095MPa, and test the moisture after dehydration for 2 hours. When the moisture drops below 300ppm, it is qualified; and the temperature is below 90°C, add MDI (according to the molar ratio of isocyanate NCO / OH = 1.6), and heat up to 120°C, vacuum reaction for 30min; evacuate the air in the reaction equipment with nitrogen, and add 1.5g of triethylenediamine, antioxidant 168, 1g and N-(β-aminoethyl)-γ-ammonia after returning to normal pressure 5 g of propyltrimethoxysilane was reacted for 15 minutes to obtain an adhesive.

Embodiment 2

[0029] Add 350g of amorphous polyester polyol, 300g of liquid polyester polyol, 250g of polyadipate-1,4-butylene glycol ester diol, and 100g of polyurethane elastomer into the reaction equipment, and heat to 120°C to start dehydration. The vacuum degree is reduced to below -0.095MPa, and the moisture is tested after dehydration for 2 hours. When the moisture drops below 300ppm, it is qualified; and the temperature is below 90°C, and MDI is added (according to the molar ratio of isocyanate NCO / OH=1.8), and the temperature is raised to 120°C, vacuum reaction for 30min; evacuate the air in the reaction equipment with nitrogen, and add 1.5g of pentamethyldipropylenetriamine, 1g of antioxidant 168 and 5g of anilinomethyltriethoxysilane after returning to normal pressure , and reacted for 15 minutes to obtain the adhesive.

Embodiment 3

[0031] Add 400g of amorphous polyester polyol, 250g of liquid polyester polyol, 200g of polyhexylene sebacate diol, and 150g of polyurethane elastomer into the reaction equipment, heat to 120°C to start dehydration, and the vacuum degree drops to - Below 0.095MPa, test the moisture after dehydration for 2 hours. When the moisture drops below 300ppm, it is qualified; and the temperature is below 90°C, add MDI (according to the molar ratio of isocyanate NCO / OH=2.0), heat up to 120°C, vacuum reaction 30min; evacuate the air in the reaction equipment with nitrogen, and add 1.5g of triethylenediamine, 168 of antioxidant and N-(β-aminoethyl)-γ-aminopropyltrimethoxyl group after returning to normal pressure 5 g of silane was reacted for 15 minutes to obtain an adhesive.

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Abstract

The invention relates to an adhesive for woodworking flat pasting. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of amorphous polyester polyol; 25 to 35 parts of liquid polyester polyol; 20 to 30 parts of crystalline polyester polyol; 5-10 parts of a polyurethane elastomer; MDI which is added according to the isocyanate number molar ratio that NCO / OH isequal to 1.6-2.0; 0.1 to 0.3 part of an antioxidant; 0.1 to 0.5 part of a catalyst; and 0.5 to 3 parts of a silane coupling agent. The adhesive disclosed by the invention has the advantages of higherviscosity, easiness in woodworking flat sticking, zero solvent discharge in the curing process, high curing speed, no edge shrinkage phenomenon, high and stable peel strength after curing and good heat resistance.

Description

technical field [0001] The invention relates to an adhesive, in particular to an adhesive for woodworking. Background technique [0002] The method of woodworking solid wood flat strip painting is usually to paint the unpainted edge banding behind the wooden furniture adhesive. Existing woodworking adhesives such as a woodworking adhesive for edge banding shown in Chinese patent 201610607911.X, "it consists of 7.9%-24% (weight percent) isocyanate, 30%-77% (weight percent) It is composed of setting polyester, 15%-45% (weight percentage) high molecular weight polymer and 0.1%-1% (weight percentage) drier". Although the adhesive improves the problem of environmental pollution, its curing time is long, which is not conducive to practical use. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide an adhesive for woodworking wallboard edge sealing and wrapping. [0004] Technical scheme o...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/04C09J11/06C08G18/42
CPCC08G18/4202C08G18/4238C09J11/06C09J175/06C08L75/04C08K5/526C08K5/544
Inventor 王飞李俊杰
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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