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Aqueous coating material with ultralow VOC (Volatile Organic Compound) release and preparation method thereof

A water-based coating, ultra-low technology, applied in the direction of coating, etc., can solve the problems of long film formation time, inconvenient construction, limited application and so on

Active Publication Date: 2014-08-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN141405A adopts a pure acrylate polymer emulsion with a core-shell structure as a film-forming substance (30-55% by mass), and adds pigments and fillers (20-35%), water (5-20%), defoamer, dispersant Additives, thickeners and other additives to obtain a super environmentally friendly latex paint with zero VOC release, which has the advantages of no stickiness at high temperature, film formation at low temperature, and close to zero VOC, but its freeze-thaw stability is poor
CN103201346A discloses a levulinic acid ester film-forming aid with a monohydroxy aliphatic alcohol of 10-20 carbon atoms, which has the advantages of low VOC release and high film-forming efficiency, but its cost is higher and the film-forming time is shorter Long, which limits the application in the field of low-VOC water-based coatings
US20010031362 discloses a two-component low-VOC coating of waterborne epoxy resin and organosilane, but its construction is inconvenient and the raw materials are relatively expensive

Method used

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  • Aqueous coating material with ultralow VOC (Volatile Organic Compound) release and preparation method thereof
  • Aqueous coating material with ultralow VOC (Volatile Organic Compound) release and preparation method thereof
  • Aqueous coating material with ultralow VOC (Volatile Organic Compound) release and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of copolymer emulsion A

[0030] 212.9 g methyl methacrylate, 227.4 g butyl acrylate, 4.8 g methacrylic acid, 9.6 g methacrylamide, 14.4 g diacetone acrylamide and 9.6 g 3-(methacryloxy)propylmethyl Dimethoxysilane, 0.72g EF-810, 0.56g DSB, 0.25g PE-6100, 0.5g NaHCO 3 and 327.6g of deionized water were sequentially added into a 2L reaction kettle with a stirring device, and the stirring was started to pre-emulsify and disperse for 1 hour.

[0031] Add 6.48g EF-810, 5.04g DSB, 2.27gPE-6100, 0.5g NaHCO in sequence to a 2L reactor equipped with a stirring device 3 , 218.4g deionized water, 11.2g methyl methacrylate, 11.97g butyl acrylate, 0.3g methacrylic acid, 0.5g methacrylamide, 0.8g diacetone acrylamide, 0.5g3-(methacryloyloxy Base) propylmethyldimethoxysilane, start stirring and pass nitrogen gas for 30min, heat in water bath to 80°C, add 10g aqueous solution containing 0.25g ammonium persulfate, 10g aqueous solution containing 0.25g sodium bisulfite...

Embodiment 10-16B

[0048] Embodiment 10-16B emulsion synthesis used monomer proportioning

[0049]

[0050] In the table, MMA is methyl methacrylate, BA is butyl acrylate, MAA is methacrylic acid, AA is acrylic acid, MAM is methacrylamide, AM is acrylamide, DAAM is diacetone acrylamide, KH-571 is 3 -(methacryloxy)propylmethyldimethoxysilane, A-151 is vinyltriethoxysilane, A-174 is γ-(methacryloxy)propyltrimethoxy silane.

[0051] The difference between the A and B emulsions described in Examples 17-22 and Example 1 is that the distribution ratio of the emulsifier in the seed emulsion and the pre-emulsion is different, and other conditions and processes are consistent with Example 1, wherein the distribution ratio of the emulsifier is shown in table 3.

[0052] Table 3: The distribution ratio of emulsifier used in the synthesis of embodiment 17-22A and B emulsion

[0053] unit g

[0054]

[0055] Table 4: Test results of various performance indicators of the copolymer emulsion of Exampl...

Embodiment 34-38

[0063] Embodiment 34-38: Preparation of water-based wood white primer

[0064] Add 17g of water and 7.5g of wetting and dispersing agent BYK-190 into a 200ml beaker, stir for 10 minutes at a stirring speed of 1200rpm, add 75g of rutile titanium dioxide and 0.5g of anti-settling agent BYK-420, and disperse at a stirring speed of 2000rpm, Stop stirring when the fineness measured by a scraper fineness meter reaches below 30 μm, and the prepared white pulp is reserved for use.

[0065] Add 60g of polymer emulsion A and 20g of polymer emulsion B into a 500ml beaker, start stirring at 1600rpm for 10 minutes, then add 0.5g of defoamer BYK-024, 0.6g of defoamer TEGO-902W, and 0.2g of leveling agent BYK -346, 1.0g deionized water, increase the speed to 3000rpm and disperse for 30 minutes, add 1.0g of silica matting powder and disperse for 30 minutes at 3000rpm, reduce the speed to 1600rpm, add 5.0g deionized water, 2.0g wax in turn Auxiliary MD2000, 0.1g leveling agent BYK-333 were st...

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Abstract

The invention relates to an environmental-friendly aqueous coating material with ultralow VOC (Volatile Organic Compound) release and a preparation method thereof. An emulsion A with low vitrification temperature and an emulsion A with high vitrification temperature are adopted to be physically blended according to a certain ratio, so as to serve as a basic film-forming substance; during the preparation of the aqueous woodenware coating material, good film forming can be achieved by only adding a small amount of film forming assistant, the aqueous woodenware coating material is low in raw material cost and simple in preparation process, and meanwhile, a coating film has excellent permeability, glossiness, water resistance and adhesion resistance.

Description

Technical field: [0001] The invention relates to an environment-friendly ultra-low VOC releasing self-crosslinking water-based coating at room temperature and a preparation method thereof, belonging to the field of water-based wood coatings. Background technique: [0002] Acrylic water-based coatings use water as the dispersant diluent. Excellent water-based acrylic coatings must have performance comparable to traditional solvent-based coatings and meet the increasingly stringent VOC (volatile organic compound) emission regulations in various countries. my country's "Technical Requirements for Environmental Labeling Products - Waterborne Coatings" (HJ / T201-2005) promulgated in 2005 defines VOC as the amount of all volatile organic compounds in the unit volume of coatings except water. The paint industry stipulates that paints with a VOC content of less than 30g / L are low-VOC paints, and paints with a VOC content of less than 1g / L are zero-VOC paints. [0003] In order to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C08F220/14C08F220/18C08F220/06C08F220/56C08F222/38C08F230/08C08F2/26C08F2/30
Inventor 李效玉李坤何立凡王祥
Owner BEIJING UNIV OF CHEM TECH
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