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High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof

A technology for wood adhesives and water resistance, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor water resistance, achieve strong water resistance, glue stability, and improve low-temperature film formation The effect of the characteristic

Active Publication Date: 2015-11-25
厦门诺维特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is in order to provide a kind of single-component, aldehyde-free, environment-friendly wood adhesive that meets II type plywood water resistance standard, to overcome the poor water resistance of existing polyvinyl acetate (PVAc) emulsion on the market, containing formaldehyde, Defects of toxic substances such as benzene or isocyanate

Method used

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  • High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof
  • High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof
  • High-water resistance formaldehyde-free and environment-friendly wood adhesive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment example 1

[0031] 45 parts of vinyl acetate; 1 part of styrene; 1 part of vinyl acetate-ethylene copolymer resin; 5 parts of PVA20885; 3 parts of ethylene glycol methacrylate acetoacetate; 2 parts; 0.3 parts of the mixture of alkylphenol polyoxyethylene ether and sodium lauryl sulfate; 0.3 parts of potassium persulfate; 40 parts of ultrapure water; 1 part of glycerol.

[0032] According to the ratio of weight fraction, add PVA2088 into the reaction kettle equipped with reflux condenser, drip hole and stirrer, and keep the stirring speed at 200-500 rpm, add ultra-pure water, heat until fully dissolved, and cool To 60-65 ℃, add emulsifier, defoamer, 2 / 3 potassium persulfate and hard shell monomer (acid vinyl-ethylene copolymer resin and styrene), after the reflux basically disappears, then heat up to 80 ℃; Add all remaining monomer mixtures (vinyl acetate, ethylene glycol methacrylate, dodecafluoroheptyl methacrylate) dropwise; then raise the temperature to 90°C and continue the reaction f...

Embodiment example 2

[0034] 45 parts of vinyl acetate; 1 part of styrene; 1 part of vinyl acetate-ethylene copolymer resin; 5 parts of acetoacetylated polyethylene glycol; 3 parts of acetoacetate methacrylate; 2 parts of tributyl phosphate; 0.3 parts of the mixture of phenol polyoxyethylene ether and sodium lauryl sulfate; 0.3 parts of potassium persulfate; 40 parts of ultrapure water; 1 part of glycerol.

[0035] According to the ratio by weight fraction, add acetoacetylated polyethylene glycol into the reaction kettle equipped with a reflux condenser, a drop hole and a stirrer, and keep the stirring speed at 200-500 rpm, add ultra-pure water, and heat until fully dissolved, cool to 60-65°C, add emulsifier, defoamer, 2 / 3 of potassium persulfate and hard shell monomer (acid vinyl-ethylene copolymer resin and styrene), after the reflux basically disappears, then Raise the temperature to 80°C; add all the remaining monomer mixture (vinyl acetate, allyl acetoacetate) dropwise; then raise the temperat...

Embodiment example 3

[0037] 48 parts of vinyl acetate; 1 part of styrene; 1 part of vinyl acetate-ethylene copolymer resin; 5 parts of acetoacetylated polyethylene glycol; 1 part of dodecafluoroheptyl methacrylate; 2 parts of tributyl phosphate; 0.3 parts of the mixture of phenol polyoxyethylene ether and sodium lauryl sulfate; 0.3 parts of potassium persulfate; 40 parts of ultrapure water; 1 part of glycerol.

[0038]According to the ratio of parts by weight, add acetoacetylated polyethylene glycol into the reaction kettle equipped with a reflux condenser, a drop hole and a stirrer, and add ultrapure water while maintaining the stirring speed at 200-500 rpm , heated to complete dissolution, cooled to 60-65°C, added emulsifier, defoamer, 2 / 3 of potassium persulfate and hard shell monomer (acid vinyl-ethylene copolymer resin and styrene), after the reflux basically disappeared , then raise the temperature to 80°C; drop all the remaining monomer mixture (vinyl acetate, dodecafluoroheptyl methacrylat...

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Abstract

The invention relates to a high-water resistance formaldehyde-free and environment-friendly wood adhesive and a preparation method thereof. The adhesive is prepared through adopting modified PVA as a protective agent, and carrying out core-shell emulsion polymerization on vinyl acetate monomers and functional monomers. The adhesive comprises the following main components: modified PVA, vinyl acetate, styrene, vinyl acetate-ethylene copolymer resin, carbonyl allyl ester, fluorinated acrylate, an emulgator, an initiator, ultrapure water, an antifreezing agent, and the like. Compared with like products at home and abroad, the prepared emulsion prepared through adopting core-shell emulsion polymerization is better in mechanical strength; besides, the stability and water resistance of the product can be improved through adding the novel protective agent; further, the water resistance, storage stability, freezing resistance, and the like, of the prepared emulsion can be significantly improved through adding the functional monomers.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and mainly relates to a novel formaldehyde-free and environment-friendly adhesive with high water resistance and a preparation method thereof. Specifically, the adhesive is a polyvinyl acetate copolymer emulsion. Background technique [0002] Polyvinyl acetate (PVAc) emulsion, commonly known as "white latex", is widely used in many fields such as architectural coatings, wood bonding, paper processing, textile printing and dyeing, cement modification, glass fiber processing, and home decoration. The production cost of polyvinyl acetate emulsion is relatively low, the polymerization process is relatively simple, non-toxic, tasteless, odorless, colorless and transparent, and has good adhesion, light resistance, and non-aging properties. As a water-based adhesive, it has the characteristics and advantages of being green and environmentally friendly compared with solvent-based adhesives; h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/00C09J11/06C09J11/08C08F263/04C08F218/08C08F212/08C08F220/22C08F222/20
Inventor 刘运权张文彬林志瑞
Owner 厦门诺维特环保科技有限公司
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