Formaldehyde-free soybean powder adhesive and preparation method thereof

A technology of adhesives and soybean powder, applied in the preparation of animal glue or gelatin, adhesives, adhesive additives, etc., can solve the problems of limited sales radius, poor product stability, high glue cost, etc., and achieve increased soluble protein content, static electricity The repulsive force increases, the effect of increasing the interaction force

Active Publication Date: 2013-04-17
宁波朝露新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention patents of CN 101475790A and CN 1670111A disclose the use of protein-containing raw materials, acid regulators, compounds containing benzene rings in molecules, preservatives, thickeners, and fillers to prepare a aldehyde-free adhesive. In the application of boards, there are problems such as high board hot-pressing temperature (above 150°C), extremely low production efficiency, and easy "explosion" during the hot-pressing process; the yield is too low; US patents US2004 / 0089418, US2005 / 0282988 A1, US2005 / 0282988 A1, discloses the use of cationic polymers, polyamide epichlorohydrin, cross-linked with soybean protein, greatly improving the bond strength and water resistance
The product introduced by this patent, due to the large amount of polyamide epichlorohydrin, results in high cost of glue, which greatly limits its application
The invention patent of CN101412898A discloses that the mixture of vegetable protein and lignin sulfonate is used as the base material, and the protein itself is modified by adding alkaline hydroxide, silicate or borate, epoxy halide, amino polymer, etc. To improve water resistance; this patented product has problems such as large seasonal variability and poor product stability. In the process of industrialization, the storage time of liquid adhesive is short, the transportation cost is high, and the sales radius is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 100 parts of water and 2 parts of sodium hydroxide to the reaction kettle to prepare a modifier solution, and then add 30 parts of soybean flour (52% crude protein content, 95% aqueous protein content in crude protein) to the modifier solution, Stir under the condition of 800r / min for 8min until no dry powdery substance appears, after aging for 50min, add 20 parts of carbon disulfide and 20 parts of thiourea, stir for 8min under the condition of 1500r / min, add 0.05 part of oxalic acid and 0.1 part of ascorbic acid, min under the condition of stirring for 5 min to obtain a liquid formaldehyde-free soybean adhesive. The liquid formaldehyde-free soybean adhesive passes through the pressure spray dryer, the rotation speed of the atomizing disc is 7500r / min, the air inlet temperature is 170°C / min, the outlet temperature is 70°C / min, and the drying time is 5min, and the light yellow formaldehyde-free soybeans are obtained Powder adhesive.

[0033] Dissolve 30 parts of th...

Embodiment 2

[0035] Add 100 parts of water, 1 part of sodium hydroxide, and 5 parts of sodium silicate in the reaction kettle to prepare a modifier solution, and then add 45 parts of soybean flour (crude protein content 45%, crude protein water-based protein content 85%), stirred at 800r / min for 10min until no dry powder appeared, after 50min of aging, added 50 parts of polyamide epichlorohydrin, stirred at 1500r / min for 10min, added 1 part of acetic acid and 0.5 Parts of ammonium ferrous sulfate were stirred at 1600r / min for 3min to obtain a liquid formaldehyde-free soybean adhesive. The liquid formaldehyde-free soybean adhesive passes through the pressure spray dryer, the rotation speed of the atomizing disc is 8500r / min, the air inlet temperature is 160°C / min, the outlet temperature is 60°C / min, and the drying time is 7min, to obtain light yellow formaldehyde-free soybeans Powder adhesive.

[0036] Dissolve 30 parts of the prepared formaldehyde-free soybean powder adhesive in 40 parts ...

Embodiment 3

[0038] Add 100 parts of water, 0.5 part of sodium hydroxide, 0.5 part of urea, 4 parts of sodium silicate, and 3 parts of sodium borate in the reactor to prepare a modifier solution, then add 25 parts of soybean powder (coarse The protein content is 60%, and the water-based protein content in the crude protein is 90%). Stir at 900r / min for 10 minutes until no dry powder appears. After aging for 50 minutes, add 15 parts of ethylene dithiocarbonate and 15 parts of potassium xanthate , stirred at 1500r / min for 10min, added 1 part of citric acid, 1 part of acetic acid, and 1 part of sodium sulfite, and stirred at 1500r / min for 5min to obtain a liquid formaldehyde-free soybean adhesive. The liquid formaldehyde-free soybean adhesive passes through the pressure spray dryer, the rotation speed of the atomizing disc is 8000r / min, the air inlet temperature is 180°C / min, the outlet temperature is 80°C / min, and the drying time is 4min to obtain light yellow formaldehyde-free soybeans Powd...

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PUM

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Abstract

The invention discloses a formaldehyde-free soybean powder adhesive. The formaldehyde-free soybean powder adhesive is prepared from the following components in parts by weight: 100 parts of water, 20 to 70 parts of soybean powder, 0.1 to 10 parts of a modifier, 20 to 120 parts of a crosslinking agent, 0.05 to 5 parts of a regulator and 0.1 to 3 parts of a reducing agent. The formaldehyde-free soybean powder adhesive is good in bonding performance and water resistance, low in production cost, long in storage period, and convenient to transport and use. A preparation method of the formaldehyde-free soybean powder adhesive is simple in preparation, good in controllability, easy to operate and realize industrial production and low in production cost, so that the formaldehyde-free soybean powder adhesive has good economic benefit, is favorable for popularization and application, and has wide application prospects.

Description

technical field [0001] The invention relates to an adhesive, in particular to an formaldehyde-free soybean powder adhesive and a preparation method thereof. Background technique [0002] With the increasing scarcity of petroleum resources, the production cost of formaldehyde adhesives is rising steadily, and the international community is increasingly concerned about the hazards of volatile formaldehyde, phenol and other harmful gases in "trialdehyde adhesives" to human health. The woodworking adhesive industry has begun to reconsider the development and research of new, natural, non-toxic adhesives, and soybean adhesives have once again become a research hotspot. In the past two years, the United States has successfully launched a soy-based formaldehyde-free plywood named "Purebond", prompting the California Air Regulatory Board (CARB) to put forward stricter new requirements than E0 for the allowable formaldehyde emission of various plywood. The promotion and implementati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J11/04C09J11/06C08J3/12
Inventor 刘小青吴頔朱锦徐益忠
Owner 宁波朝露新材料科技有限公司
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