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Novel wood adhesive

A wood adhesive, a new type of technology, applied in the field of adhesive preparation, can solve the problems of water resistance, bonding strength, solid content and poor storage stability, and achieve the effect of obvious price advantage, mild reaction conditions and long storage period

Inactive Publication Date: 2016-11-23
广西南宁桂尔创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a new type of wood adhesive to solve the existing starch-based adhesives used for wood-based panels, which still have problems such as poor water resistance, bonding strength, solid content and storage stability.

Method used

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  • Novel wood adhesive

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The preparation method of described novel wood adhesive comprises the following steps:

[0035] S1: Prepare yam starch slurry I with a concentration of 16-21Be' and a pH value of 3.2-3.7;

[0036] S2: Add dimethyl glutarate, N,N-dimethylacetamide, coupling agent and catalyst with a concentration of 1%-1.9% to the yam starch slurry I in step S1, and then heat the mixture at a temperature of 45-55 °C, the stirring speed is 60-80r / min, and the cross-linking and grafting reaction is carried out for 3-4h, and the slurry II is obtained;

[0037] S3: Add sodium hydroxide to the slurry II of step S2, adjust the pH value to 9.2-9.6, then add epoxy chlorobutane, urea, initiator, plasticizer, toughening agent, tackifier, and then The temperature is 56-58°C, the stirring speed is 50-100r / min, and the crosslinking reaction is carried out for 1.5-2h to prepare the slurry III;

[0038] S4: Add a stabilizer to the slurry III in step S3, adjust the pH value to 7.8-8.2, raise the tempe...

Embodiment 1

[0041] A novel wood adhesive, in parts by weight, comprising the following raw materials: 132 parts of yam starch, 15 parts of dimethyl glutarate, 13 parts of N,N-dimethylacetamide, 4 parts of sodium hydroxide, 5 parts of epoxy chlorobutane, 4 parts of urea, 0.5 part of coupling agent, 0.3 part of initiator, 0.2 part of catalyst, 0.3 part of stabilizer, 0.8 part of defoamer, 0.9 part of plasticizer, 0.8 part of toughening agent, 0.6 parts of tackifier;

[0042] The coupling agent is 2,5-dimethyl-2,5-bis(benzoylperoxy)-hexane;

[0043] The initiator is azobisisobutyrate (ethylene glycol acrylate);

[0044] The catalyst is a platinum catalyst;

[0045] The stabilizer is an organotin stabilizer;

[0046] Described defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether;

[0047] Described plasticizer is citric acid ester;

[0048] Described toughening agent is polypropylene adiene rubber;

[0049] Described tackifier is propyltrimethoxysilane;

[0050] The prepa...

Embodiment 2

[0056] A novel wood adhesive, in parts by weight, comprising the following raw materials: 104 parts of yam starch, 13 parts of dimethyl glutarate, 11 parts of N,N-dimethylacetamide, 2 parts of sodium hydroxide, 3 parts of epoxy chlorobutane, 2 parts of urea, 0.3 part of coupling agent, 0.1 part of initiator, 0.1 part of catalyst, 0.1 part of stabilizer, 0.5 part of defoamer, 0.6 part of plasticizer, 0.5 part of toughening agent, 0.4 parts of tackifier;

[0057] The coupling agent is 2,5-dimethyl-2,5-bis(benzoylperoxy)-hexane;

[0058] The initiator is azobisisobutyrate (ethylene glycol acrylate);

[0059] The catalyst is a platinum catalyst;

[0060] The stabilizer is an organotin stabilizer;

[0061] Described defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether;

[0062] Described plasticizer is citric acid ester;

[0063] Described toughening agent is polypropylene adiene rubber;

[0064] Described tackifier is propyltrimethoxysilane;

[0065] The prepa...

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Abstract

The invention discloses a novel wood adhesive, which is prepared from the following raw materials in parts by weight: 104 to 162 parts of Chinese yam starch, 13 to 18 parts of dimethyl glutarate, 11 to 15 parts of N,N-dimethyl acetamide, 2 to 5 parts of sodium hydroxide, 3 to 7 parts of epoxy chlorobutane, 2 to 5 parts of urea, 0.3 to 0.7 part of coupling agents, 0.1 to 0.4 part of initiating agents, 0.1 to 0.3 part of catalysts, 0.1 to 0.4 part of stabilizing agents, 0.5 to 1 part of antifoaming agents, 0.6 to 1.2 parts of plasticizers, 0.5 to 0.9 part of toughening agents and 0.4 to 0.8 part of thickening agents. The novel wood adhesive has the advantages that the bonding strength is high; the water resistance performance is high; the novel wood adhesive completely conforms to relevant standards in GB / T14732-2006; the strength of produced plywood is much higher than that of China type II artificial board standards. The novel wood adhesive can be widely applied to the production of artificial boards, plywoods and cellulose boards, and replaces tridecanal glue to be used.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to a novel wood adhesive. Background technique [0002] Since the beginning of the 21st century, the domestic wood-based panel industry has achieved unconventional rapid development, with an average annual growth rate of 22%. In 2009, the output of wood-based panels exceeded 80 million cubic meters, and the annual consumption of adhesives was about 5 million. It has become the world's largest wood-based panel production country. At present, the adhesives used in the wood-based panel manufacturing industry at home and abroad are mainly urea-formaldehyde resin, phenolic resin, melamine-formaldehyde resin, etc. This type of adhesive has a high content of free formaldehyde, and slowly releases toxic formaldehyde gas during use, causing harm to the human body. In order to reduce the emission of formaldehyde gas, the domestic research idea is to improve the origi...

Claims

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Application Information

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IPC IPC(8): C09J103/02C09J11/06C09J11/04C09J11/08
CPCC09J103/02C08L2205/03C09J11/04C09J11/06C09J11/08C08L71/02C08K13/02C08K5/14C08K5/11C08K5/20C08K5/21
Inventor 戚海冰
Owner 广西南宁桂尔创环保科技有限公司
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