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Two-in-one urea-fomaldehyde adhisive and emulsified wax production process

A technology for emulsifying paraffin and production process, applied in the directions of wax adhesives, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve the problems of complicated production processes, affecting the quality of boards, and difficult to grasp the ratio of adhesives and waterproofing agents. , to achieve the effect of being beneficial to environmental protection, simplifying the production process and process, and omitting the dehydration process

Inactive Publication Date: 2005-05-18
TAISHAN UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

Adhesive and waterproofing agent should be produced separately, and two sets of equipment should be used to apply wood shavings or fiber raw materials when producing boards. quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0007] (1) Preparation of low free formaldehyde urea-formaldehyde resin:

[0008] Formula: urea: formaldehyde (molar ratio) = 1: 1.2

[0009] Amount of various raw materials (parts by weight)

[0010] Urea (98%) 100 {(①55②28③17) add in three times}

[0011] Formaldehyde (37%) 160~170

[0012] Sodium hydroxide (40%) appropriate amount

[0013] Glacial acetic acid amount

[0014] crafting process:

[0015] 1. Add formaldehyde to the reaction kettle, and adjust the pH value to 7.0-7.5 with sodium hydroxide solution while stirring.

[0016] 2. Add the first part of urea and raise the temperature to 92°C±2°C within 40-50 minutes, and keep it warm at this temperature. When the cloud point reaches 50°C, immediately adjust the pH value to 4.6-4.8 with acetic acid.

[0017] 3. Take a sample to measure the viscosity. When the viscosity reaches 1.3-1.5S (measured with a 100×10 bubble viscometer), adjust the pH value to 7.0-7.5 with sodium hydroxide solution, and cool down.

[0018...

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Abstract

The invention discloses a two-in-one production process of urea-formaldehyde glue and emulsified paraffin, which belongs to the technical field of new chemical products. The technical key to the solution is to add paraffin and emulsifier to the glue after subtracting the dehydration process after the urea-formaldehyde resin is produced. The melting mixture of the adhesive and waterproofing agent can be directly obtained as a two-in-one product with simple production process, energy saving, no waste water pollution, environmental purification, cost reduction, and guaranteed product board quality. It is suitable for processing particleboard and fiberboard in the wood industry. .

Description

1. Technical field [0001] The invention belongs to the invention of a new process manufacturing method for chemical products. 2. Background technology [0002] In the production of particleboard and fiberboard in the wood processing industry, adhesives and waterproofing agents need to be applied at the same time. Most of the adhesives used are urea-formaldehyde resin glue, and the waterproofing agent is made of molten paraffin or emulsified paraffin. Adhesive and waterproofing agent should be produced separately, and two sets of equipment should be used to apply wood shavings or fiber raw materials when producing boards. quality. [0003] The purpose of the present invention is to integrate the production of urea-formaldehyde resin and waterproofing agent into one, simplify the production process, ensure the quality of the plate, and reduce the production cost. 3. Contents of the invention [0004] The composition of the process of the present invention is that the urea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/24C09J191/06
Inventor 张欣张超
Owner TAISHAN UNIV
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