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A kind of silane coupling agent enhanced modified bean cake-based adhesive and preparation method thereof

A technology of silane coupling agent and modifier, which is applied in the field of wood adhesives, can solve the problems of non-environmental protection, poor water resistance, and high price, and achieve the effects of low cost, simple preparation method, and good water resistance

Inactive Publication Date: 2017-09-29
NANJING TECH UNIV
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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 to overcome the disadvantages of poor water resistance, high price and non-environmental protection of the adhesive in the above-mentioned technology, and provide a kind of silane coupling agent enhanced modified bean cake-based adhesive. Another purpose of the present invention is to provide The preparation method of the above-mentioned adhesive uses a new chemical modification method to modify the bean cake, and an environmentally friendly, reasonably priced, and water-resistant wood adhesive that does not add any aldehydes or highly toxic substances can be obtained. agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First add 100ml of water to a 250ml three-neck flask, adjust the reaction temperature to 35°C, dissolve 25g of bean cake powder (soybean flour fineness over 100 mesh sieve, protein content is 45%) in water, until the bean flour is evenly dispersed, add 10g of maleic anhydride, then add 1.5g of silane coupling agent KH~550, stir evenly, add 0.2g of initiator potassium persulfate, stir for 30min, store at room temperature with the mouth closed, and obtain silane coupling agent enhanced modified bean cake base Wood adhesive.

[0019] The prepared adhesive is bonded to the poplar veneer, and the bonding strength is 1.2MPA after testing. It can pass the national second-class board standard.

Embodiment 2

[0021] First add 100ml of water to a 250ml three-neck flask, adjust the reaction temperature to 60°C, slowly add 40g of bean cake powder (soybean flour fineness over 100 mesh sieve, protein content is 55%) into the flask until the bean cake powder is evenly dispersed, add Add 9.5g of butyric anhydride, then add 8g of silane coupling agent KH~570, stir evenly, add 1g of initiator ammonium persulfate, stir for 90min, store at room temperature with the mouth closed, and obtain the bean cake-based wood glue reinforced and modified by silane coupling agent adhesive.

[0022] The prepared adhesive is bonded to the poplar veneer, and the bonding strength is 1.1MPA after testing. It can pass the national second-class board standard.

Embodiment 3

[0024] First add 100ml of water to a 250ml three-neck flask, adjust the reaction temperature to 45°C, slowly add 30g of bean cake powder (soybean flour fineness over 100 mesh sieve, protein content is 50%) into the flask until the bean cake powder is evenly dispersed, add Add 2g of benzoic anhydride, then add 5g of silane coupling agent KH-580, stir evenly, add 0.6g of initiator benzoyl peroxide, stir for 110min, keep closed at room temperature, and obtain silane coupling agent-enhanced modified bean cake base adhesive.

[0025] The prepared adhesive is bonded to the poplar veneer, and the bonding strength is 0.9MPA after testing. It can pass the national second-class board standard.

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PUM

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Abstract

The invention relates to a soybean cake base adhesive reinforced and modified by a silane coupling agent and a preparation method of the soybean cake base adhesive. The adhesive is characterized by comprising the following components in parts by weight: 100 parts of water, 20-40 parts of soybean cake powder, 1-10 parts of silane coupling agent, 1-10 parts of anhydride type modifier and 0.1-1 part of initiator. According to the preparation method, firstly soybean cakes are dissolved in tap water, mixed uniformly after the reaction temperature is adjusted to 30-60 DEG C, then added with the modifier, subsequently added with the silane coupling agent and finally added with the initiator, the reaction continues for 30-120 minutes, and then the product is conserved at the room temperature in a sealing manner. The preparation method is simple and has high repeatability; no formaldehyde or extremely toxic substances are used as the raw materials during synthesis, the adhesive is an environment-friendly adhesive based on the mechanism of crosslinking copolymerization of active groups in the silane coupling agent and the active groups in the soybean cakes by using the modifier, so that the water resistance and maneuverability of the soybean cake base adhesive are improved.

Description

technical field [0001] The invention relates to the field of wood adhesives, in particular to a silane coupling agent-enhanced modified bean cake-based adhesive and a preparation method thereof. Background technique [0002] With the decrease of forest resources and the increasing demand for wood products in the market, the wood-based panel industry has developed rapidly due to its high wood utilization rate. %. [0003] The production of wood-based panels requires the use of a large amount of adhesives, and the wood adhesives on the market are mainly trialdehyde glues. In 2012, the consumption of trialdehyde glue in my country's forestry industry has reached 13.874 million tons (solid content is 100%, the following data is the same); urea-formaldehyde resin (including modified urea-formaldehyde resin) is 12.374 million tons, accounting for 89.17% of the output; phenolic resin is 1.0427 million t, accounting for 7.52% of the total output; 460,000 t of melamine urea-formalde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C08H1/00
Inventor 张利雄白德军沈如伟王重庆
Owner NANJING TECH UNIV