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