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Water-solubility modified melamine-formaldehyde impregnating resin and preparation method thereof as well as application thereof

A melamine formaldehyde and resin-impregnated technology, which is applied in the fields of furniture manufacturing and papermaking, can solve the problems of loss of surface hardness, good wear resistance, and inability to improve resin stability, and achieve good flexibility, which is conducive to large-scale production and simple process.

Active Publication Date: 2012-03-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the resin is often modified by a modification method. The modification effect can only achieve one modification purpose and often improves one aspect of performance, while losing other excellent properties. For example, only adding flexibility Polymer toughening agent can not improve the stability of the resin, and often loses its excellent properties such as surface hardness and wear resistance

Method used

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  • Water-solubility modified melamine-formaldehyde impregnating resin and preparation method thereof as well as application thereof
  • Water-solubility modified melamine-formaldehyde impregnating resin and preparation method thereof as well as application thereof
  • Water-solubility modified melamine-formaldehyde impregnating resin and preparation method thereof as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Preparation of water-soluble methylated melamine-formaldehyde resin:

[0035] Weigh 175g of melamine and 112.2g of formaldehyde, add them into the reactor at 50°C, adjust the pH=8.5, react for 30 minutes, raise the temperature to 85°C, weigh 212g of methanol and add them into the reactor, adjust the pH=6.5, react for 30 minutes , Add 5g of urea to drop to 30°C and add 0.3g of powder to get the required water-soluble methylated melamine formaldehyde resin.

[0036] Step 2: Preparation of water-soluble acrylate emulsion toughening agent:

[0037] Take by weighing methyl methacrylate 12g, butyl acrylate 30g, acrylic acid 2g, styrene 54g, emulsifier (sodium lauryl sulfate) 2g, initiator (potassium persulfate) 0.6g, its synthetic process method is: The above initiator, all monomers, 1.6g emulsifier and 100mL deionized water were pre-emulsified; the remaining 0.4g emulsifier and 50ml deionized water were stirred and dissolved in the reactor and the temperature was ra...

Embodiment 2

[0042] Step 1: Preparation of water-soluble methylated melamine-formaldehyde resin:

[0043] Weigh 175g of melamine and 112.2g of formaldehyde, add them into the reactor at 50°C, adjust the pH=8.5, react for 30 minutes, raise the temperature to 85°C, weigh 212g of methanol and add them into the reactor, adjust the pH=6.5, react for 30 minutes , add 10g urea to cool down to room temperature and add 0.4g pull open powder to get the required water-soluble methylated melamine formaldehyde resin.

[0044] Step 2: Preparation of water-soluble acrylate emulsion toughening agent:

[0045] Take by weighing methyl methacrylate 15g, butyl acrylate 27g, acrylic acid 2g, styrene 55g, emulsifier (sodium lauryl sulfate) 2.5g, initiator (ammonium persulfate) 0.6g, and its synthetic process method is: The above-mentioned initiator, all monomers (99g in total), 2g emulsifier and 100mL deionized water were pre-emulsified; the remaining 0.5g emulsifier and 50ml deionized water were stirred and d...

Embodiment 3

[0050] Step 1: Preparation of water-soluble methylated melamine-formaldehyde resin:

[0051] Weigh 175g of melamine and 112.2g of formaldehyde, add them into the reactor at 50°C, adjust the pH=8.5, react for 30 minutes, raise the temperature to 85°C, weigh 212g of methanol and add them into the reactor, adjust the pH=6.5, react for 30 minutes , add 8g urea to cool down to room temperature and add 0.4g pull open powder to get the required water-soluble methylated melamine formaldehyde resin.

[0052] Step 2: Preparation of water-soluble acrylate emulsion toughening agent:

[0053] Take by weighing methyl methacrylate 12g, butyl acrylate 30g, acrylic acid 2g, styrene 55g, emulsifier (nonylphenol polyoxyethylene ether) 2.5g, initiator (potassium persulfate) 0.8g, and its synthetic process method is : The above-mentioned initiator, all monomers (99g in total), 2g emulsifier and 100mL deionized water are pre-emulsified; the remaining 0.5g emulsifier and 50ml deionized water are st...

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Abstract

The invention discloses a water-solubility modified melamine-formaldehyde impregnating resin and a preparation method thereof as well as application thereof; the preparation method of the water-solubility modified melamine-formaldehyde impregnating resin comprises the following steps of: carrying out addition and polycondensation reaction on formaldehyde and melamine, and then compositing with formaldehyde removing agents such as a penetrating agent, urea and the like after carrying out methanol etherification on the formaldehyde and the melamine to obtain a water-solubility methyl-etherifiedmelamine-formaldehyde resin; using an acrylic ester monomer and vinyl benzene for preparing a water-solubility polyurethane emulsion toughening agent by using an emulsion polymerization method; usingtoluene diisocyanate, polyether dihydroxypropionic acid and ethylene diamine for preparing a water-solubility polyurethane emulsion modifier by using a self-emulsification method; and mixing three kinds of resins according to proportions by weight to prepare the water-solubility modified melamine-formaldehyde solvent resin of the invention. The resin can be used for impregnating edge sealing strips of paper and decorative paper in furniture and papermaking industries and has the advantages of good flexibility, low content of residual formaldehyde, long-term stability and the like. The preparation method has the advantages of having simple the preparation process, avoiding the damage and the pollution due to the volatilization and diffusion of harmful solvents, realizing the green production and the energy conservation and emission reduction.

Description

technical field [0001] The invention relates to a water-soluble modified melamine-formaldehyde impregnated resin which can be used in furniture and papermaking industries such as paper edge strips and decorative papers, and a preparation method thereof, belonging to the fields of furniture manufacturing and papermaking. Background technique [0002] Melamine formaldehyde resin, referred to as melamine resin, is a thermosetting resin, which is flame-retardant, water-resistant, heat-resistant, aging-resistant, arc-resistant, chemically resistant, has good insulation performance, gloss and mechanical strength, and is widely used in wood furniture, plastics, Paint, paper, textile, leather, electrical, pharmaceutical and other industries. However, its disadvantages such as high brittleness, short storage period, toxicity and volatility of organic solvents limit its further wide application. For this reason, research on its modification has become a current hotspot. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/32C08L25/14C08L75/12D21H17/51
CPCC08G18/0823C08G12/427C08G18/4887D21H17/51C08G12/32C08L61/32C08L75/12C08L25/14C08G18/3228C08L75/08
Inventor 任力
Owner SOUTH CHINA UNIV OF TECH
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