Coating classification: anti graffiti interior wall environmental protection coating for children's room

Core tip: Introduction: The special anti graffiti interior wall environmental protection paint for children's room is a new type of environmental protection latex paint Because of its advantages of simple construction, no poison, convenient cleaning, rich color and little environmental pollution, it is more and more favored and recognized by people In recent years, with the refinement of the market, more and more users have special requirements for the wall emulsion paint used in children's rooms: generally, it is required to have good environmental protection performance, because children's immunity is worse than adults, and it is also the growth and development period, so the safety requirements of the paint are much stricter than that of the common interior wall paint, which does not contain (or add) organic volatile substances (V Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Brief introduction: the special anti graffiti interior wall environmental protection paint for children's room is a new type of environmental protection latex paint, which is more and more favored and recognized by people due to its advantages of simple construction, non-toxic, convenient cleaning, rich color and small environmental pollution In recent years, with the refinement of the market, more and more users have special requirements for the wall emulsion paint used in children's rooms: generally, it is required to have good environmental protection performance, because children's immunity is worse than adults, and it is also the growth and development period, so the safety requirements of the paint are much stricter than that of the common interior wall paint, which does not contain (or add) organic volatile substances (VOC), heavy metals, APEO Formaldehyde, etc.; on the other hand, it is required that the interior wall architectural coating for children's room has good stain resistance performance Because children like to paint on the wall, it is required that after children play and make the wall polluted, they only need to wipe it gently with water or detergent to restore the white wall Special anti core graffiti interior wall environmental protection coatings for children's housing are selected with special core shell structure, low flavor styrene acrylic emulsion, using water as external plasticizer, no need to add any film-forming auxiliaries, that is, good film formation, special protective colloid, excellent anti freezing and thawing properties, no need to add antifreeze and film forming AIDS, VOC content of the coating is very low (almost zero), and coating film is very low It is a new type of environmental protection interior wall emulsion paint with good antifouling performance Production: O formulation design table 1 children's room environmental protection anti graffiti interior wall coating basic formula raw material, Omega /% deionized water 20-35 dispersant 0.5-0.6 wetting agent 0.1-0.2 bactericide 0.1-0.15 defoaming agent 0.2-0.3 titanium white 21-25 filler 16-18 16-18 low air styrene acrylic emulsion 20-23 functional acrylic emulsion 6-9 cover polymer 2-8 thickener 0.3-0.4 1 emulsion type selection At present, the commonly used emulsion in the market is latex vinyl acetate VAE emulsion, core shell structure styrene acrylic emulsion VAE emulsion can be regarded as an internal plasticizing product of polyvinyl acetate Because it introduces ethylene molecule chain into polyvinyl acetate molecule, the discontinuous phase of acetyl group is generated, and the rotational degree of freedom of polymer chain is increased, the space hindering is small, the main chain of polymer becomes soft, and the migration of plasticizer will not occur, thus ensuring the product's permanent softness On the other hand, the minimum film forming temperature of VAE emulsion is generally less than 5 degrees Therefore, although the film formation is better, no film additive is needed, but the film thickness is relatively soft, and the stain is easy to infiltrate into the coating, which is difficult to remove The core shell structure emulsion polymer belongs to the dissimilar molecular composite emulsion It is because two or more monomers of different properties are polymerized according to stage polymerization (i.e seed polymerization or multi-stage polymerization) under certain conditions The inner and outer parts of the emulsion particles are enriched with different components, and a series of heterogeneous particles of different shapes are obtained through different combinations of core and shell, thereby giving the nucleus The different properties of the shell emulsion can obtain the excellent properties of the general random copolymer and the mechanical blend 2 The influence of the covering polymer the covering polymer has three excellent properties of common inorganic filler: ① hollow glass bead spherical structure, good stain resistance; ② fine and uniform particle size, which can improve the efficiency of titanium dioxide, thus replacing part of titanium dioxide, reducing the formula cost; ③ strong affinity with polymer binder, low demand for binder 3 Selection of filler type ① the role of aluminum silicate in coating a the dry film coverage of ultra-fine aluminum silicate instead of part of titanium dioxide will not change, and can improve its whiteness If the amount of titanium dioxide is not changed, its dry film coverage is obviously improved, and its whiteness is greatly improved; B the pH value range of ultrafine aluminum silicate is 9.7-10.8, which has the buffering effect of pH value Especially in the storage process of vinyl acetate emulsion paint, it can prevent the pH value from dropping due to the hydrolysis of vinyl acetate, increase the storage stability of the emulsion paint, and avoid the corrosion of the inner wall of the metal container; C The ultra-fine and network structure of aluminum silicate makes the latex paint system slightly thickened, with good suspension, and prevents the sinking of solid component and the appearance of water separation on the surface; D the ultra-fine aluminum silicate makes the latex paint film have good scrub resistance and weather resistance, in addition, it can shorten the surface drying time; e Superfine aluminum silicate has the function of extinction, so it can be used as an economic extinction agent in semi gloss and sub gloss coatings, and it is not suitable to be used in gloss coatings ② The role of diatomite in coating diatomite as filler, has the characteristics of large porosity, strong absorption, stable chemical properties, wear resistance, heat resistance, etc., which can provide excellent surface performance for coating, and can increase capacity, thickening and adhesion Because of its large pore volume, the wet coating can shorten the drying time, reduce the dosage of the emulsion and reduce the cost It can also control the surface gloss of the coating evenly, increase the abrasion resistance and scratch resistance of the coating, remove dampness and deodorization, and also have the characteristics of purifying air, sound insulation, waterproof and heat insulation, and good permeability ③ The function of talcum powder in coatings because of its excellent physical and chemical properties, such as lubricity, viscosity resistance, flow aid, fire resistance, acid resistance, insulation, high melting point, chemical inactivity, good hand feel, softness, good luster, strong adsorption, the use of talcum powder in coatings can play a role of framework, reduce manufacturing cost and improve coating hardness The flake structure of talcum powder makes the film have high water resistance and impermeability of stains 4 the selection of auxiliaries and the influence of hydrophobic agents on waterborne coatings are microemulsion non-ionic, acid resistance, alkali resistance, hard water resistance, strong water solubility, stable emulsion, no dilution of water in any proportion, no demulsification, no caking, long shelf life, high solid content and good dispersibility It can play a role of scratch resistance, surface hydrophobic (i.e lotus leaf hydrophobic) performance, anti adhesion and anti fouling performance, making the film more smooth The preparation process will be deionized water, dispersant, wetting agent, fungicide, defoamer and other auxiliaries mixed evenly, then add titanium white powder and all kinds of fillers until the fineness is less than 50 m, then add emulsion, cover polymer, thickener adjust viscosity, stir evenly after discharge Performance and technical indicators: Table 2 technical indicators of emulsion paint for interior wall of children's room paint, no hard block in the container, uniform after mixing, two coats of barrier free, low temperature stability (three cycles), no deterioration, normal drying time (surface drying) / h ≤ 2 contrast rate 0.95 alkali resistance (24 hours), no abnormal scrub resistance / time ≥ 10000 Table 3 The limit of harmful substances in children's room coating (according to GB / T 18582-2008 standard) project index volatile organic compounds content (VOC) / (g / L) ≤ 10 benzene, toluene, ethylbenzene, xylene total / (mg / kg) no free formaldehyde detected / (mg / kg) no soluble heavy metal detected / (mg / kg) no coating home is focused on coating, diatom mud, paint coating, coating technology, News and information of fire retardant coating, coating, diatom mud, paint coating, coating technology, decoration knowledge and decoration effect map of fire retardant coating,