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Composite curing agent and application of composite curing agent to production of melamine impregnated paper

A technology of melamine and curing agent, which is applied in the fields of paper, papermaking, textiles and papermaking, etc. It can solve the problems of inability to realize adhesive performance, difficult urea-formaldehyde resin curing completely, and low crosslinking density of cured products, so as to shorten the pressing time, The effect of improving bonding quality and improving application performance

Inactive Publication Date: 2013-01-16
CHANGZHOU WEIXING DECORATIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without the addition of acid-base regulating substances, even if the board itself can provide a certain acidity, it is difficult to completely cure the urea-formaldehyde resin, and the cross-linking density of the cured product is low, and good adhesive performance cannot be achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0018] Follow the steps below:

[0019] ① Glue making: melamine formaldehyde resin formula: melamine 1200 parts, formaldehyde 1300-1500 parts, water 700-800 parts, diethylene glycol 4 parts, caprolactam 2 parts; urea-formaldehyde resin formula: urea 1000 parts, formaldehyde 1800-2200 parts, 450-550 parts of water.

[0020] ②Glue compounding: the first impregnating liquid: 30 parts of melamine formaldehyde resin, 20 parts of urea-formaldehyde resin, 0.1 part of curing agent (accounting for 2‰ of the total glue mass); the second impregnating liquid: melamine formaldehyde resin.

[0021] ③Dipping for the first time (please ask the inventor to add specific conventional process parameters such as glue viscosity, immersion time or glue amount).

[0022] ④ drying for the first time (the inventor is asked to refer to the second drying to supplement the specific conventional process parameters).

[0023] ⑤ dipping for the second time (the inventors are asked to refer to the first dip...

preparation Embodiment 2-11

[0027] Preparation Example 2-11: (If the pre-curing rate is incorrect, please correct the inventor, and pay attention to reflect the progress of the present invention)

[0028] Using the method of Preparation Example 1, adjust the type of curing agent and its addition amount (accounting for the percentage of the total mass of glue when dipping for the first time) according to the table below, the pre-curing rate of the prepared impregnated paper product 2-11 is shown in the table below :

[0029] Hardener Amount added Pre-curing rate Preparation Example 2 Hexamethylenetetramine 1.5‰ 55% Preparation Example 3 ammonium chloride 1.5‰ 60% Preparation Example 4 Triethanolamine 1.5‰ 50% Preparation Example 5 10 parts of hexamethylenetetramine, 50 parts of ammonium chloride, 20 parts of triethanolamine 1.5‰ 70% Preparation Example 6 10 parts of hexamethylenetetramine, 40 parts of ammonium chloride, 20 parts of triethanolamine ...

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PUM

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Abstract

The invention discloses a composite curing agent. The composite curing agent comprises 10 parts of hexamethylenetetramine, 40 to 60 parts of ammonium chloride and 10 to 30 parts of triethanolamine. The regulation and control effect of the composite curing agent on the curing rate of thermosetting amino resin is superior to that of the conventional common curing agent. The invention also aims to provide a concrete method for applying the composite curing agent to the production process of melamine impregnated paper. The method comprises the step of adding the composite curing agent during the impregnation for the first time. The adhesive performance is improved by regulating and controlling the pre-curing rate and achieving the latent curing effect of the composite curing agent. In addition, the optimal combination of the cost and utility is realized by optimizing the adding amount of the curing agent.

Description

technical field [0001] The invention relates to the field of resin production and processing, in particular to a composite curing agent for thermosetting amino resins, and to the field of melamine-impregnated paper production where the composite curing agent is applied. Background technique [0002] Among the thermosetting amino resins, the most important and widely used resins are urea-formaldehyde resin (referred to as UF resin), melamine-formaldehyde resin (referred to as MF resin), polyamide polyamine epichlorohydrin resin (referred to as PAE resin), etc. In the production and application of thermosetting amino resins, the curing agent is an important additive component. Reasonable use of the curing agent can make up for the defects or deficiencies in the curing performance of the thermosetting amino resin itself, and can solve the problems in the production and application of the thermosetting amino resin. According to Process requirements regulate the curing process of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/51D21H17/49
Inventor 张杰张建文
Owner CHANGZHOU WEIXING DECORATIVE MATERIALS
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