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Formaldehyde-free adhesive based on acrylate

An acrylate and adhesive technology, applied in the direction of adhesives, acidic copolymer adhesives, adhesive types, etc., can solve the problems of not meeting the needs of the wood-based panel production process, short opening time, etc., and achieve excellent cohesive strength, The effect of good water absorption and good adhesion

Inactive Publication Date: 2018-11-30
东营市盛基环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that water-based polymer-isocyanate (EPI) adhesives and soybean protein adhesives have a short opening time and cannot meet the needs of the wood-based panel production process, the present invention selects acrylate or its polymers with good water retention properties as the main Adhesive materials, and adding a certain amount of additives properly, can make the adhesive’s opening time (from the time of gluing the blank to entering the press) reach more than 90 minutes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 23% sodium polyacrylate solution 48.2 parts

[0026] Ethylene-vinyl acetate copolymer emulsion 20 parts

[0027] Ammonium persulfate 0.1 part

[0028] Silane coupling agent 1.5 parts

[0029] Defoamer 0.1 part

[0030] 30 servings of wheat flour

[0031] Antiseptic bactericide 0.1 part.

[0032] First add the formula amount of sodium polyacrylate solution, ethylene-vinyl acetate copolymer emulsion, ammonium persulfate, silane coupling agent into the reaction kettle, stir for 10-15 minutes to make it evenly mixed, and then add the formula amount of defoamer and antiseptic sterilization Continue stirring for 5-10 minutes, then slowly add the wheat flour while stirring, so that the wheat flour is fully swollen and mixed until the appearance is uniform and no visible particles are visible, and then continue to stir for 10 minutes.

[0033] The open time of the obtained formaldehyde-free wood-based panel adhesive can reach 6 hours, and the type II water-resistant adhesi...

Embodiment 2

[0035] 30% calcium acrylate solution 63.25 parts

[0036] Ethylene-vinyl acetate copolymer emulsion 10 parts

[0037] Azobisisobutyronitrile 0.05 part

[0038] Silane coupling agent 1.5 parts

[0039] Defoamer 0.1 part

[0040] 20 servings of wheat flour

[0041] 5 parts bentonite

[0042] Antiseptic bactericide 0.1 part.

[0043] First add calcium acrylate solution and ethylene-vinyl acetate copolymer emulsion, azobisisobutyronitrile, silane coupling agent in the reaction kettle, stir for 10-15 minutes to make them evenly mixed, and then add the antifoaming agent and Continue to stir for 5-10 minutes, and then slowly add the mixture of wheat flour and bentonite while stirring, so that the wheat flour and bentonite are fully swollen and mixed until the appearance is uniform and there are no visible particles, and then continue to stir for 10 minutes.

[0044] The open time of the obtained formaldehyde-free wood-based panel adhesive can reach 8 hours, and the type II wate...

Embodiment 3

[0046] 30% magnesium polyacrylate solution 43.2 parts

[0047] 18% polyvinyl alcohol solution 30 parts

[0048] Azobisisobutyronitrile 0.05 part

[0049] Epoxy resin 2.5 parts

[0050] Defoamer 0.1 part

[0051] 20 servings of wheat flour

[0052] Antiseptic bactericide 0.1 part.

[0053] First add calcium polyacrylate solution, ethylene-vinyl acetate copolymer emulsion, azobisisobutyronitrile, epoxy resin in the reaction kettle, stir for 15-25 minutes to make them evenly mixed, then add the defoamer and Continue to stir for 5-10 minutes, then slowly add wheat flour while stirring, so that the wheat flour and bentonite are fully swollen and mixed until the appearance is uniform without visible particles, and then continue to stir for 10 minutes.

[0054] The obtained formaldehyde-free wood-based panel adhesive has an open time of 4 hours, a type II water-resistant adhesive strength of 1.2 MPa, and a dry strength of 2.8 MPa.

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Abstract

The invention relates to wood adhesive, in particular to novel formaldehyde-free artificial board adhesive and a preparation method thereof. The novel formaldehyde-free artificial board adhesive aimsto solve the problems that EPI (emulsion polymer isocyanate) adhesive and soybean protein adhesive have short opening hours and can not meet the requirement an artificial board production process, acrylate or other polymers are selected as a main adhesion material, and the main adhesion material is subjected to compounding modification with polyvinyl alcohol solution, polymer emulsion, wheat flour, soyabean protein powder, wood flour and the like to obtain the formaldehyde-free artificial board adhesive with long opening hours.

Description

technical field [0001] The invention relates to a wood adhesive, in particular to a novel formaldehyde-free wood-based panel adhesive and a preparation method thereof, belonging to the field of fine chemicals. Background technique [0002] At present, the adhesives used in the production of wood-based panels are mainly urea-formaldehyde resin adhesives, followed by phenolic resin adhesives and melamine resins. These adhesives are all formaldehyde series, and the most prominent problem when using these adhesives is the release of formaldehyde. Because formaldehyde is released during the production of wood-based panels and the use of their products, formaldehyde is the "toxicity" of wood-based panels that we usually talk about. With the progress of human society, people's awareness of environmental protection and physical health has been strengthened, which has led to concerns about the amount of formaldehyde released from wood-based panels, and has begun to solve the problem...

Claims

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Application Information

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IPC IPC(8): C09J133/02C09J129/04C09J199/00C09J123/08C09J163/00C09J11/04C09J11/06
CPCC08L2205/03C08L2205/035C09J11/04C09J11/06C09J133/02C08L23/0853C08L99/00C08K3/346C08L29/04C08L63/00
Inventor 杨奠基石延芳
Owner 东营市盛基环保工程有限公司
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