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Wood industry adhesive and preparation thereof

An adhesive and wood technology, applied in the direction of adhesives, adhesive types, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of long curing time, slow bonding speed, poor penetration, etc. Short, fast bonding speed, no arch effect

Inactive Publication Date: 2008-11-05
浙江久而久化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology generally has the disadvantages of slow bonding speed, poor penetration, easy yellowing, arching, and long curing time

Method used

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  • Wood industry adhesive and preparation thereof
  • Wood industry adhesive and preparation thereof
  • Wood industry adhesive and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Embodiment: a kind of wood adhesive, wherein: be made up of following components by weight parts:

[0031] 1 part of paraformaldehyde; 2 to 4.6 parts of dichloroethane; 3 to 4 parts of ethyl ester or / and 10 to 15 parts of hexahydropyridine; 0.03 to 0.54 parts of phosphorus pentoxide and / or terephthalate 0.022 to 0.514 parts of phenol; 0.003 to 0.018 parts of p-toluenesulfonic acid; less than 0.1 parts of additives.

[0032] A preparation method of wood adhesive, wherein: comprising the following steps:

[0033] Polymerization step, cracking step, distillation step and refining step;

[0034] The aggregation steps include:

[0035] Step 1: Select 1 part of paraformaldehyde and mix with 2 to 4.6 parts of dichloroethane in parts by weight;

[0036] Step 2: Add the pre-mixed additive dropwise to the mixture mixed in step 1 at a temperature ranging from 55°C to 63°C, and the time is controlled at most 2 hours; the additive includes 3 to 4 parts of ethyl ester or / and 10 t...

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PUM

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Abstract

The invention discloses a wood adhesive which consists of following components by weight portion: 1 portion of paraformaldehyde; 2 to 4.6 portions of ethylene dichloride; 3 to 4 portions of ethyl ester and / or 10 to 15 portions of hexahydropyridine; 0.03 to 0.54 portion of phosphoric anhydride and / or 0.022 to 0.514 portion of hydroquinone; 0.003 to 0.018 portion of paratoluenesulfonic acid; and less than 0.1 portion of additive; the preparation method includes the steps of preparing the finished product after a polymerization step, a pyrolysis step, a distillation step and a rectification step according to the components. The whole reaction system is always in back flow state during the preparation process, by methods of adding inhibitor and improving technical conditions etc. at the depolymerization stage of the reaction, the occurrence of side reaction is reduced, and properties such as purity etc. of the product is enhanced, thus allowing the invention to have the advantages of high adhesion speed, super penetrability, free from yellow discoloration and arching, as well as short curing time.

Description

technical field [0001] The invention relates to a preparation method of an adhesive, in particular to a wood adhesive and a preparation method thereof. Background technique [0002] Adhesives used in the wood industry mainly include phenolic resin and urea-formaldehyde resin. Among them, phenolic resin adhesive has the advantages of excellent mechanical properties, good water resistance and weather resistance, and is widely used in the domestic wood industry. In addition, with the development of the bamboo board industry, the demand for phenolic resin is also further expanding. Because bamboo is a resource that can be quickly regenerated, it has higher strength and better wear resistance than wood, and bamboo resources are being widely developed in our country. Our common wood adhesive such as the Chinese patent authorization announcement number is CN1271163C " the manufacture method of phenolic resin adhesive for wood and bamboo boards ", and the authorization announcement...

Claims

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Application Information

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IPC IPC(8): C09J161/34C08G12/26
Inventor 陈金才
Owner 浙江久而久化学有限公司
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