Urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure polymer emulsion and its preparation and curing method

An interpenetrating network structure and acrylate-based technology, applied in coatings and other directions, can solve the problems of modified polymers such as difficult stability, water resistance, alkali resistance, high toughness, and poor storage stability, so as to improve the use value , low price, high market value and social value

Active Publication Date: 2020-11-17
JIANGSU RUIKANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from this technology that the modification of urea-formaldehyde resin by acrylate polymer has great room for improvement in performance, but the method of doping acrylate latex with urea-formaldehyde resin is usually poor in storage stability, and the modified polymerization It is difficult to achieve or exceed the performance of pure acrylic polymers such as stability, water resistance, alkali resistance, high toughness, etc.

Method used

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  • Urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure polymer emulsion and its preparation and curing method
  • Urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure polymer emulsion and its preparation and curing method
  • Urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure polymer emulsion and its preparation and curing method

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Experimental program
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preparation example Construction

[0058] 2. Preparation of recycled urea-formaldehyde resin powder

[0059] After drying the waste urea-formaldehyde resin, use a powder modified high-speed cooling mixing unit (50 liters of Zhangjiagang Hongji Machinery Co., Ltd.) to carry out preliminary stirring and pulverization, so that the largest particle is less than 10 mm, and then put it into a high-speed pulverizer (Hangzhou Xu Public Machinery Equipment Co., Ltd. - multifunctional pulverizer) for pulverization, the particles of solid waste are required to be screened through 120 mesh. Coarse particles continue to be crushed and sieved. The screened particles are urea-formaldehyde resin powder. The gel-like urea-formaldehyde resin can be crushed, and there is no particle size requirement.

Embodiment 1

[0061] A kind of regeneration of cross-linked urea-formaldehyde resin and the preparation method of modified acrylate interpenetrating network structure polymer, comprising the following steps:

[0062] 1. Formula (kg):

[0063] a. Pre-emulsion:

[0064] water box:

[0065]

[0066]

[0067] Oil phase:

[0068]

[0069] b. Primer:

[0070]

[0071] c. Additional initiator:

[0072] 10 parts of water;

[0073] APS 0.2 parts.

[0074] 2. Polymerization process

[0075] 1) According to the formulation amount of the pre-emulsion, dissolve the oil-soluble initiator AIBN in the BA monomer and then add other vinyl monomers, then swell the urea-formaldehyde resin powder in this vinyl monomer, and put it in a low-temperature cooling bath In the middle (ice bath), use a high-shear homogeneous emulsifier to shear, disperse, and grind for 60 minutes, shear and disperse the urea-formaldehyde resin particles to translucent or transparent, and then add functional monomers ...

Embodiment 2

[0079] A kind of regeneration of cross-linked urea-formaldehyde resin and the preparation method of modified acrylate interpenetrating network structure polymer, comprising the following steps:

[0080] 1. Formula (kg):

[0081] a. Pre-emulsion:

[0082] water box:

[0083] 100 parts of water;

[0084] Emulsifier NRS-10 5 parts;

[0085] Emulsifier AE3218 12 parts;

[0086] Oil phase:

[0087]

[0088] b. Primer:

[0089]

[0090] c. Additional initiator:

[0091] 10 parts of water;

[0092] APS 0.2 parts.

[0093] 2. Polymerization process

[0094] 1) According to the formulation amount of the pre-emulsion, dissolve the oil-soluble initiator AIBN in the BA monomer and then add other vinyl monomers, then swell the urea-formaldehyde resin powder in this vinyl monomer, and put it in a low-temperature cooling bath In the middle (ice bath), use a high-shear homogeneous emulsifier to shear, disperse, and grind for 60 minutes. Shear and disperse the urea-formaldehyde...

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Abstract

The invention relates to the technical field of coatings and painting, and discloses a polymer emulsion with a urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure and a preparation and curing method thereof. In terms of mass percentage, the polymer emulsion is composed of the following raw materials: Made by in-situ emulsion polymerization: 0.1-10% emulsifier; 0.1-0.5% initiator; 0.01-0.4% pH regulator; 15-40% vinyl monomer; 0.5-15% functional monomer; molecular weight regulator 0-2%; co-solvent 0-3%; regenerated urea-formaldehyde resin powder 10-40%; the balance is water. The invention can efficiently recycle and utilize urea-formaldehyde resin waste, turn waste into treasure, and the prepared urea-formaldehyde resin waste regenerated modified acrylate interpenetrating network structure polymer has solvent resistance, water resistance, alkali resistance, high toughness and high strength. Effect, wide application, low price, high market value and social value.

Description

technical field [0001] The invention relates to the technical field of paint and painting, in particular to a polymer emulsion with a urea-formaldehyde resin waste regeneration modified acrylate interpenetrating network structure and a preparation and curing method thereof. Background technique [0002] Urea-formaldehyde resin, also known as urea-formaldehyde resin (UF resin), is the polycondensation of urea and formaldehyde under the action of a catalyst (alkaline or acidic catalyst) to form an initial urea-formaldehyde resin, and then forms an insoluble and infusible thermosetting resin under the action of a curing agent or additive. resin. Urea-formaldehyde resins are generally water-soluble resins, which are cheap, have sufficient raw materials, and are relatively easy to cure. The cured urea-formaldehyde resin is non-toxic, colorless, good light resistance, hard and scratch-resistant. The molecular structure of urea-formaldehyde resin contains polar oxygen atoms, so it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/24C09D133/12C09D125/14C09D133/08C09D131/08C08F220/14C08F212/08C08F220/18C08F220/58C08F220/06C08F220/20C08F218/08
CPCC09D131/08C09D133/24C09D161/24C08F212/08C08F218/08C08F220/14C08F220/18C08L2205/04C08L2207/20C08F220/1804C08L33/24C08L61/24C08L31/08C08F220/20C08F220/06C08F220/58C08F220/1808
Inventor 江永波任华宋帅潘毅候于坤
Owner JIANGSU RUIKANG NEW MATERIAL TECH CO LTD
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