Method for producing composite SSL-UF urea-formaldehyde resin glue

A technology of urea-formaldehyde resin glue and production method, which is applied in the direction of adhesive types, adhesives, aldehyde/ketone condensation polymer adhesives, etc., and can solve problems such as environmental pollution, poor aging resistance, and unsatisfactory adhesive performance. , achieve cost reduction and high initial viscosity

Inactive Publication Date: 2005-03-16
曲韵丰
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  • Abstract
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Problems solved by technology

Limited by the production cost, the amount of modifier added in the glue is small, the performance of the produced adhesive is not ideal, and the quality of the pressed artificial board is poor. If the amount of modifier added is increased, the production cost will be greatly increased, which is difficult for users to accept; Urea-formaldehyde glue produced by using urea, formaldehyde and polyvinyl alcohol through the process of addition, polycondensation and neutralization has high content of free aldehyde, poor aging resistance, high production cost and harmful to the environment. Pollution

Method used

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  • Method for producing composite SSL-UF urea-formaldehyde resin glue
  • Method for producing composite SSL-UF urea-formaldehyde resin glue
  • Method for producing composite SSL-UF urea-formaldehyde resin glue

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] The production process of the present invention is carried out in a reaction kettle, which is stirred by a stirrer inside the kettle, and jacketed outside the kettle, through which steam is passed for heating and water is passed for cooling. The urea-formaldehyde generation reaction is

[0018]

[0019] One of the features of the present invention is that ammonium lignosulfonate SSL binder is added in the reaction, which is an excellent formaldehyde absorbent, so dehydration is not necessary in the production process, which is the cause of the pollution of formaldehyde-free water waste liquid, and is also the cause of free aldehyde in the product. The reason for the low content is that ammonium lignosulfonate SSL is added, and the sugar content in ammonium lignosulfonate must be guaranteed to be 6% to 8%. The significance lies in the ...

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Abstract

The invention discloses a method for producing composite SSL-UF urea-formaldehyde resin glue which comprises the steps of modifying, addition reaction section A, condensation reaction section A, condensation reaction section B, addition reaction section B, the composition include urea and formaldehyde by the ratio of 1 : (1.5-1.65), the content of lignosulfonic acid ammonium is 15-20% of the methyl aldehyde weight, the content of polyvinyl alcohol is 1-1.4% of urea.

Description

technical field [0001] The invention relates to a method for producing resin glue, more specifically, to a method for producing composite urea-formaldehyde resin glue. Background technique [0002] At present, domestic wood-based panel production, such as particleboard, plywood, multi-layer board, and blockboard production, all use general urea-formaldehyde glue. Limited by the production cost, the amount of modifier added in the glue is small, the performance of the produced adhesive is not ideal, and the quality of the pressed artificial board is poor. If the amount of modifier added is increased, the production cost will be greatly increased, which is difficult for users to accept; Urea-formaldehyde glue produced by using urea, formaldehyde and polyvinyl alcohol through the process of addition, polycondensation and neutralization has high content of free aldehyde, poor aging resistance, high production cost and harmful to the environment. pollute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24
Inventor 曲韵丰
Owner 曲韵丰
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