A kind of exterior wall latex coating
Technical field
The present invention relates generally to a kind of coating, relates in particular to a kind of exterior wall latex coating.
Background technology
That coating should have is anticorrosion, waterproof, grease proofing, chemicals-resistant, fast light, heatproof etc., and object is exposed among atmosphere, is subject to the erosion of oxygen, moisture etc., causes the breakoff phenomenons such as corrosion of metal, foxy, cement weathering.At article surface, be coated with coating, form layer protecting film, can stop or postpone generation and the development of these breakoff phenomenons, extended the work-ing life of various materials.So provide protection is a Main Function of coating, improve the provide protection of traditional coating, could further improve the quality of coating.
Summary of the invention
The object of the invention is exactly for a kind of exterior wall latex coating is provided.
The present invention is achieved by the following technical solutions:
, it is comprised of the raw material of following weight parts:
The hydroxyethyl cellulose aqueous solution 10-20 that acrylate and vinyl acetate emulsion 62-70, massfraction are 2-4%, Sodium hexametaphosphate 99 2-3, N hydroxymethyl acrylamide 1-2, aluminium silicate powder 20-26, white carbon black 20-30, cetomacrogol 1000 3-4, polyvinylpyrrolidone 1-2, tributyl phosphate 0.1-0.3, adhesive aid 20-30, deionized water 30-70;
Described adhesive aid is comprised of the raw material of following weight parts:
Benzene emulsion 60-70, tragacanth gum 6-8, Zinc Pyrithione 1-2, sodium silicoaluminate 4-6, butyl polyacrylate 1-2, Natvosol 2-4,2,6-ditertbutylparacresol 0.1-0.3, water are appropriate;
The 10-20% of above-mentioned weight tragacanth gum is joined in 10-15 times of water, add Natvosol and 2,6-ditertbutylparacresol, dispersed with stirring 10-15 minute under the speed of 400-600 rev/min, rising temperature is 60-80 ℃, add Zinc Pyrithione, sodium silicoaluminate, butyl polyacrylate, after fully mixing, add each raw material of residue, after stirring, cross the steam heating of 80-100 ℃, the system solid content of making is 60-65%, is cooled to normal temperature, obtains described adhesive aid.
A preparation method for exterior wall latex coating, comprises the following steps:
(1) hydroxyethyl cellulose aqueous solution that is 2-4% by above-mentioned deionized water, massfraction, Sodium hexametaphosphate 99, N hydroxymethyl acrylamide, aluminium silicate powder, white carbon black mix, join in shredder, 1000-2000 rev/min is ground 30-40 minute, obtains slurry;
(2) slurry obtained above is transferred in dispersion machine, adds each raw material except tributyl phosphate, 1600-2000 rev/min of dispersed with stirring 10-20 minute, finally adds tributyl phosphate, fully mixes, and obtains described exterior wall latex coating.
Advantage of the present invention is:
Coating paint film that the present invention produces is hard, glossiness good, anti-impact force is strong, is not easy cracking, has high weather resisteant, contamination resistance, strong adhesion, without special odor, and the heavy metal such as not mercurous, plumbous, formaldehydeless volatile matter, meets the technical requirements of environmental protection coating material.
Embodiment
Embodiment 1
, it by following weight parts (kilogram) raw material form:
The hydroxyethyl cellulose aqueous solution 20 that acrylate and vinyl acetate emulsion 70, massfraction are 2%, Sodium hexametaphosphate 99 2, N hydroxymethyl acrylamide 1, aluminium silicate powder 26, white carbon black 30, cetomacrogol 1000 4, polyvinylpyrrolidone 1, tributyl phosphate 0.3, adhesive aid 30, deionized water 50;
Described adhesive aid is comprised of the raw material of following weight parts:
Benzene emulsion 60, tragacanth gum 6, Zinc Pyrithione 1, sodium silicoaluminate 4, butyl polyacrylate 1, Natvosol 2,2,6-ditertbutylparacresol 0.3, water are appropriate;
By 20% of above-mentioned weight tragacanth gum, join in 15 times of water, add Natvosol and 2,6-ditertbutylparacresol, under the speed of 600 revs/min, dispersed with stirring is 15 minutes, rising temperature is 80 ℃, add Zinc Pyrithione, sodium silicoaluminate, butyl polyacrylate, after fully mixing, add each raw material of residue, after stirring, cross the steam heating of 100 ℃, the system solid content of making is 65%, is cooled to normal temperature, obtains described adhesive aid.
A preparation method for exterior wall latex coating, comprises the following steps:
(1) hydroxyethyl cellulose aqueous solution that is 2% by above-mentioned deionized water, massfraction, Sodium hexametaphosphate 99, N hydroxymethyl acrylamide, aluminium silicate powder, white carbon black mix, and join in shredder, and 2000 revs/min are ground 40 minutes, obtain slurry;
(2) slurry obtained above is transferred in dispersion machine, adds each raw material except tributyl phosphate, 2000 revs/min of dispersed with stirring 20 minutes, finally add tributyl phosphate, fully mix, and obtain described exterior wall latex coating.
Performance test: paint film appearance is full, smooth, good without lump, glossiness;
Abrasion resistance test: pass through for 10000 times, paint film is without breakage;
Artificial ageing resistance test: 2000 hours non-foaming, do not peel off, flawless.