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Water-thinned latex paint containing nanometer calcium carbonate for inner wall and its prepn process

A technology for nano-calcium carbonate and interior wall coatings, applied in latex paints, coatings, etc., can solve problems affecting the application effect of nano-calcium carbonate, high particle surface energy, and material performance degradation, and achieve improved thixotropy and high gloss , the effect of short working time

Inactive Publication Date: 2003-02-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ordinary micron-scale calcium carbonate, there are two disadvantages when it is directly applied to organic media: one is that the particle surface energy is high, it is in a thermodynamically unstable state, and it is easy to aggregate into agglomerates, which affects the performance of nano-calcium carbonate. Application effect: the surface of calcium carbonate is hydrophilic and oleophobic, it is difficult to disperse in organic media, and there is no binding force with the base material, which is easy to cause interface defects and lead to material performance degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0025] Embodiment 1A. Preparation of modified polymer emulsion (use amount is mass parts):

[0026] Using full acrylate polymerization method: using sodium dodecyl sulfate (SDS) and alkylphenol polyoxyethylene ether (OP-10) as a composite emulsifier, wherein the amount of sodium dodecyl sulfate (SDS) is 0.25 parts , The amount of alkylphenol polyoxyethylene ether (OP-10) is 0.55 parts, and these two emulsifiers are mixed in 25 parts of deionized water and heated to dissolve. Add the dissolved emulsifier solution into the reactor, stir and heat up. Add 1.8 parts of methyl methacrylate (10% of the total amount) and 2.2 parts of butyl acrylate (10% of the total amount) into the reactor, raise the temperature to 75°C and add 13.8 parts of deionized water dissolved ammonium persulfate 0.02 parts. Wait for the temperature to rise to 80°C and the monomer starts to be initiated. When the system obviously appears "blue" phenomenon, keep the reaction temperature at 80°C, and start to ...

Embodiment 2A

[0038] Embodiment 2A. Preparation of modified polymer emulsion (use amount is mass parts):

[0039] Styrene-acrylate polymerization method: Add 1.2 parts of MS-1 to 20 parts of deionized water, stir, heat up, add 1.8 parts of styrene and 2.2 parts of butyl acrylate, heat up to 72°C and add deionized water 18.3 parts of 0.06 parts of dissolved ammonium persulfate, when the monomer is initiated until the system starts to "turn blue", the temperature is kept at about 75°C, and 15.8 parts of styrene and 20.2 parts of butyl acrylate mixed with 0.2 parts of methacrylic acid are added dropwise At the same time, 0.06 parts of ammonium persulfate dissolved in 20 parts of deionized water was added dropwise. After the dropwise addition, the temperature was raised to 95° C., the reaction was continued for 0.5 hours, the temperature was lowered, and the mixture was stirred until it was cooled to room temperature. Modified polymer emulsion formulation:

[0040] Monomer: styrene (hard) 1.8+...

Embodiment 3A

[0050] Embodiment 3A. Preparation of modified polymer emulsion (use amount is mass parts)

[0051] All acrylate thermal polymerization method: use 0.42 parts of SDS and 0.84 parts of OP-10 as compound emulsifiers, mix these two emulsifiers in 11.2 parts of deionized water and heat to dissolve. Add the dissolved emulsifier solution into the reactor, stir and heat up. Add 1.8 parts of methyl methacrylate (9.5% of the total amount) and 2.3 parts of octyl acrylate (10% of the total amount) into the reactor, raise the temperature to 75°C and add 25 parts of ammonium persulfate dissolved in deionized water 0.063 parts. Wait for the temperature to rise to 80°C, the monomers start to be initiated, and when the system obviously appears "blue" phenomenon, keep the reaction temperature at 80°C, and start to drop 17.1 parts of methyl methacrylate (90.5% of the total amount) and octyl acrylate 20.8 parts (90% of the total consumption), respectively mixed 0.21 parts of methacrylic acid in...

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Abstract

The present invention is a water-thinned latex paint containing nanometer calcium carbonate for inner wall and its preparation process. The paint consists of nanometer calcium carbonate, modified polymer emulsion, other pigment and filler, assistant A, assistant B, assistant C and calcium carbonate slurry. The modified polymer emulsion consists of soft monomer and hard monomer in the mass ratio of 54 / 46 to 56 / 44, the soft monomer is methyl acrylate, ethyl acrylate or capryl acrylate; and the hard monomer is methyl methacrylate of styrene. The nanometer calcium carbonate as the paint solid component can disperse homogeneously in the latex paint without needing surface modification and the paint has raised performance.

Description

technical field [0001] The invention relates to a water-based latex interior wall paint and a preparation method thereof, in particular to a water-based latex paint containing nano-calcium carbonate, full acrylate copolymer emulsion or styrene-acrylate copolymer emulsion and a preparation method thereof. technical background [0002] Traditional architectural coatings are usually divided into two categories: solvent-based coatings and water-based coatings. Because solvent-based paints contain a large amount of volatile organic solvents and cause environmental pollution, they are gradually replaced by environmentally friendly water-based paints. Water-based latex paint is a paint composed of synthetic resin water emulsion as the main film-forming substance, pigments and fillers, additives and water. The main function of interior wall paint is to decorate and protect the wall surface of the room. As an interior wall coating, it should have a smooth, fine texture, soft color,...

Claims

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Application Information

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IPC IPC(8): C09D5/02C09D7/00C09D133/04
Inventor 李效玉叶露
Owner BEIJING UNIV OF CHEM TECH
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