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Hydroxyl acrylic emulsion for water-based two-component anti-doodling anti-sticking coating and preparation method of hydroxyl acrylic emulsion

A hydroxyacrylic acid, water-based two-component technology, applied in the direction of coating, etc., can solve the problems of reduced anti-graffiti and anti-adhesive effect, decreased hardness of the paint film, etc., and achieve good anti-graffiti and anti-adhesive effect, good compactness and high hardness Effect

Active Publication Date: 2020-10-13
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN105219247A reports a kind of anti-graffiti two-component transparent varnish and its preparation method. Cross-linking reaction is carried out through hydroxyl acrylic emulsion and water-based isocyanate curing agent. Wax emulsion is added in the formula to reduce surface tension, reaching a certain anti-graffiti. Sticking effect, but because the wax emulsion is distributed on the surface of the paint film, it does not participate in cross-linking and curing. After repeated graffiti removal and physical wear, with the loss of wax emulsion, its anti-graffiti and anti-sticking effect is bound to be greatly reduced, and adding After the wax emulsion, the hardness of the paint film will also decrease significantly

Method used

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  • Hydroxyl acrylic emulsion for water-based two-component anti-doodling anti-sticking coating and preparation method of hydroxyl acrylic emulsion
  • Hydroxyl acrylic emulsion for water-based two-component anti-doodling anti-sticking coating and preparation method of hydroxyl acrylic emulsion
  • Hydroxyl acrylic emulsion for water-based two-component anti-doodling anti-sticking coating and preparation method of hydroxyl acrylic emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 0.75g SDS, 2.4g NaHCO 3 1. Add 400g of water into the 3L reactor, start stirring and heating.

[0044] Add 125g MMA, 94g BA, 70g HEMA, 4.5g MAA, 6g AMA, 20g ABEX 8018R and 90g deionized water into 1L pre-emulsification kettle A for pre-emulsification to prepare pre-emulsion A.

[0045] Add 152g MMA, 74g BA, 70g HEMA, 4.5g MAA, 30g vinyl polysiloxane, 40g ABEX 8018R and 90g deionized water into 1L pre-emulsification tank B for pre-emulsification to prepare pre-emulsion B.

[0046] When the temperature in the reactor rose to 85°C, the pre-emulsion A and 20g of ammonium persulfate aqueous solution with a mass fraction of 6% were added dropwise for 1.5 hours, and after 0.5 hours of insulation, there was no obvious reflux on the wall of the reactor. The core layer emulsion is prepared.

[0047] Add dropwise pre-emulsion B and 30g mass fraction of 6% ammonium persulfate aqueous solution, dropwise time is 1.5h, keep warm for 0.5h after dropwise addition, there is no obvious ...

Embodiment 2

[0049] 0.75g SDS, 2.4g NaHCO 3 1. Add 400g of water into the 3L reactor, start stirring and heating.

[0050] Add 145g MMA, 97g BA, 47g HEMA, 4.5g MAA, 6g AMA, 20g ABEX 8018R and 90g deionized water into 1L pre-emulsification kettle A for pre-emulsification to prepare pre-emulsion A.

[0051] Add 132g MMA, 70g BA, 94g HEMA, 4.5g MAA, 30g vinyl polysiloxane, 40g ABEX 8018R and 90g deionized water into 1L pre-emulsification tank B for pre-emulsification to prepare pre-emulsion B.

[0052] When the temperature in the reactor rose to 85°C, the pre-emulsion A and 20g of ammonium persulfate aqueous solution with a mass fraction of 6% were added dropwise for 1.5 hours, and after 0.5 hours of insulation, there was no obvious reflux on the wall of the reactor. The core layer emulsion is prepared.

[0053] Add dropwise pre-emulsion B and 30g mass fraction of 6% ammonium persulfate aqueous solution, dropwise time is 1.5h, keep warm for 0.5h after dropwise addition, there is no obvious ...

Embodiment 3

[0055] 0.75g SDS, 2.4g NaHCO 3 1. Add 400g of water into the 3L reactor, start stirring and heating.

[0056] Add 159g MMA, 112g BA, 18g HEMA, 4.5g MAA, 6g AMA, 20g ABEX 8018R and 90g deionized water into 1L pre-emulsification kettle A for pre-emulsification to prepare pre-emulsion A.

[0057] Add 149g MMA, 93g BA, 54g HEMA, 4.5g MAA, 30g vinyl polysiloxane, 40g ABEX 8018R and 90g deionized water into 1L pre-emulsification tank B for pre-emulsification to prepare pre-emulsion B.

[0058] When the temperature in the reactor rose to 85°C, the pre-emulsion A and 20g of ammonium persulfate aqueous solution with a mass fraction of 6% were added dropwise for 1.5 hours, and after 0.5 hours of insulation, there was no obvious reflux on the wall of the reactor. The core layer emulsion is prepared.

[0059] Add dropwise pre-emulsion B and 30g mass fraction of 6% ammonium persulfate aqueous solution, dropwise time is 1.5h, keep warm for 0.5h after dropwise addition, there is no obvious...

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Abstract

The invention relates to hydroxyl acrylic emulsion for a water-based double-component anti-doodling anti-sticking coating and a preparation method of the hydroxyl acrylic emulsion. The hydroxyl acrylic emulsion comprises a vinyl-containing polymerizable monomer, a hydroxyl acrylate monomer, a cross-linking monomer, polymerizable organic silicon, an emulsifier and the like. The hydroxyl acrylic emulsion with a core-shell structure is prepared by adopting a step-by-step emulsion polymerization method, and hydroxyl and organic silicon are simultaneously distributed on a shell layer of emulsion particles. The coating meets national standard requirements, has the characteristics of low VOC content, small smell, high crosslinking density, strong permeability resistance, good scratch resistance,low surface tension and the like, is applied to the fields of building outer walls, urban communal facilities and the like, and can achieve good anti-doodling and anti-sticking effects.

Description

technical field [0001] The invention belongs to the field of acrylic emulsion synthesis, and in particular relates to a hydroxy acrylic emulsion for water-based two-component anti-graffiti and anti-stick coatings and a preparation method thereof. Background technique [0002] Anti-graffiti and anti-adhesive coating is a coating with special surface functions. It has low surface tension, high cross-linking density, self-cleaning effect on the surface, dirt rolls off naturally, easy to erase all kinds of graffiti, self-adhesive The paper will come off easily after being applied. At present, small street advertisements and malicious graffiti in public places or tourist attractions have become incurable diseases hated by the government and citizens, which not only seriously affect the image of a city, but also bring great troubles to advertising management. [0003] Solvent-based anti-graffiti and anti-adhesive coatings not only consume a lot of energy, but also contain a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F265/04C08F283/12C08F220/14C08F220/18C08F220/20C08F220/06C08F220/40C09D151/00
CPCC08F265/06C08F265/04C08F283/124C09D151/003C08F220/14C08F220/06
Inventor 刘懿平侯雷刚景传明乔义涛
Owner WANHUA CHEM GRP CO LTD
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