Adhesive for wood and preparation method of same

A technology of adhesives and wood, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of short activation period, unstable product quality, inability to use price reactivity, etc., and achieve activation The effect of long-term and stable bonding strength

Pending Publication Date: 2019-12-24
郑州轻大产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] A kind of polyurethane sealant is disclosed in the Chinese patent application document whose application publication number is CN106433548A, and the sealant can achieve sealing effect in a short time; Compound mixing device, which can solve the problem that the current production process of prepolymer mixing method cannot use aromatic diisocyanate system with low price and high reactivity
However, the above-mentioned polyurethane sealant and the water-based polyurethane prepolymer produced have the following problems: the activation period is short, the bonding strength gradually decreases with time during use, and the product quality is unstable

Method used

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  • Adhesive for wood and preparation method of same

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preparation example Construction

[0015] The preparation method of the wood adhesive of the present invention comprises the following steps: uniformly mixing the adhesive A liquid material with the reinforcing agent powder to obtain a powder-liquid mixture, the reinforcing agent powder being soybean defatted soybean powder, cottonseed protein powder, peanut protein powder, starch, and flour; then mix the powder-liquid mixture with adhesive material B evenly to obtain an adhesive; the adhesive is polyurethane adhesive, soybean protein adhesive One of the agent and starch adhesive.

[0016] The powder-liquid mixture also includes water.

[0017] The adhesive material B is at least one of toluene diisocyanate, xylene diisocyanate and polyamide epichlorohydrin.

[0018] The ratio of the mass of the powder-liquid mixture to the mass of the adhesive is (55-95): (5-45), that is, the ratio is 1.2-19. Preferably, the ratio of the mass of the powder-liquid mixture to the mass of the adhesive material B is 1.6-11.

[...

Embodiment 1

[0026] The preparation method of the adhesive of the present embodiment comprises the following steps:

[0027] 1) 10g of ethylene glycol, 95g of defatted soybean flour and 300g of water (water enters the powder-liquid mixer from the liquid feed port) are mixed uniformly at a stirring rate of 1000rpm to obtain a powder-liquid mixture;

[0028] 2) Mix the obtained powder-liquid mixture with 40 g of toluene diisocyanate evenly at a stirring rate of 300 rpm to obtain the product.

Embodiment 2

[0030] The preparation method of the adhesive of the present embodiment comprises the following steps:

[0031] 1) 10g of glycerol, 70g of cottonseed protein powder, 10g of starch and 300g of water were uniformly mixed at a stirring rate of 2000rpm to obtain a powder-liquid mixture;

[0032] 2) Mix the obtained powder-liquid mixture with 60 g of xylene diisocyanate at a stirring rate of 500 rpm to obtain the final product.

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Abstract

The invention belongs to the technical field of adhesive materials, and particularly relates to an adhesive for wood and a preparation method of same. The preparation method of the adhesive for the wood comprises the following steps: uniformly mixing an adhesive A liquid material with an enhancer powder material to obtain a powder-liquid mixture, wherein the enhancer powder material is at least one of defatted soybean powder, cottonseed protein powder, peanut protein powder, starch and flour; then uniformly mixing the powder-liquid mixture with the adhesive B material to obtain an adhesive; and the adhesive is one of a polyurethane adhesive, a soybean protein adhesive and a starch adhesive. The adhesive prepared according to the preparation method disclosed by the invention is long in activation period and stable in bonding strength, and can be applied to processing of various artificial boards, such as plywood, blockboards and shaving boards.

Description

technical field [0001] The invention belongs to the technical field of adhesive materials, and in particular relates to an adhesive for wood and a preparation method thereof. Background technique [0002] At the end of the 1990s, a large number of three-formaldehyde glue companies (urea-formaldehyde glue, phenolic glue, melamine-formaldehyde glue) were born. The free formaldehyde contained in wood-based panels comes from formaldehyde-type adhesives except for trace amounts from the wood raw materials themselves. Trialdehyde glue will release formaldehyde during production and use, and the release period is 3 to 15 years. It is the main culprit that causes the long-term excessive formaldehyde content in indoor air and seriously endangers human health. In recent years, with the increasing awareness of environmental protection, formaldehyde-free adhesives have been continuously introduced, which are well accepted by the market and consumers. In particular, polyurethane adhesiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J177/00C08G18/32C08G18/62C08G18/64C08G18/76
CPCC08G18/3206C08G18/6212C08G18/6446C08G18/6484C08G18/7614C09J175/04C09J177/00C08L75/04
Inventor 方少明王要丽吴诗德田志壮高建勇
Owner 郑州轻大产业技术研究院有限公司
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