Background technology
True mineral varnish is a kind of high build paint with natural-like stone, marble, grouan, natural in color, has the texture of lithotome, can provide the pattern structure of various three-dimensional shape, visually can show the elegance of whole building and serious U.S., be dry-fasten stone on external wall best substitute.True mineral varnish is generally made up of high molecular polymer, natural colour sand and related auxiliaries.
Natural colour sand has natural colour, and color is firm, abundant, colour-fast, not containing any dyestuff, nonpoisonous and tasteless pollution-free, anticorrosive, acid and alkali-resistance.But it is as sandy paint main raw material in recent years, along with increasing gradually of sandy paint demand, people, to the exploitation of its blindness and use, have made rare natural colour sand resource more and more exhausted, and the supply of material is more and more nervous.In addition, have aberration between the different mineral resources of natural colour sand, unit weight is comparatively large, and take natural colour sand as the true mineral varnish of aggregate, though lighter than plug-in stone material a lot, its materials still reach 4-6Kg/m
2.
Summary of the invention
The present invention is directed to the problem of the comparatively large and scarcity of resources of natural colour sand unit weight, provide a kind of raw material to be easy to get and the little true mineral varnish of unit weight, it raw material composition and weight percent proportioning as follows: organosilicon crylic acid latex 16 ~ 21%, water 14 ~ 17%, pottery sand 55 ~ 63%, natural sliver 4 ~ 6%, water-holding agent 0.3 ~ 0.7%, defoamer 0.1 ~ 0.3%, wood fibre 0.3 ~ 2%, sanitas 0.3 ~ 0.6%.
The grain grade proportion of described pottery sand is: 20 ~ 40 order 40%, 40 ~ 70 order 25%, 70 ~ 100 orders 35%.
The specification of described sliver is 1 ~ 3mm, and thickness is 0.3mm.
Described water-holding agent is hydroxyethyl ether cellulose or hydroxypropyl methyl cellulose ether.
Described defoamer is polydimethylsiloxane.
Described sanitas is ROHM AND HAAS LXE sanitas.
The preparation method of the true mineral varnish of described light haydite is as follows:
(1) starting material of certainweight are taken according to the above ratio;
(2) in mixing and blending machine, add water, organosilicon crylic acid latex, water-holding agent, wood fibre, at room temperature stir 10min with the speed of 400r/min;
(3) add pottery sand and natural sliver, under room temperature, stir 15min with the speed of 1000r/min;
(4) add defoamer, sanitas successively, then stirrer speed is down to 400r/min, stir 10min, obtain described true mineral varnish product.
The present invention has following beneficial effect:
(1) the present invention selects pottery sand to be that true mineral varnish filler substitutes traditional natural colour sand, and pottery sand unit weight is significantly less than natural colour sand, and (the present invention's pottery sand used unit weight is 810Kg/m
3, natural colour sand unit weight is 1750Kg/m
3), make the brushing materials of true mineral varnish by original 4-6Kg/m
2be down to 2-3Kg/m
2, effectively alleviate skin deadweight, reduce geostatic pressure, also alleviate material of construction transport pressure;
(2) sand of making pottery is formed through 1200 DEG C of high-temperature calcination crystallizations by potter's clay, and raw material is easy to get, and cost is low.The present invention for filler with sand of making pottery, solves the problem that true mineral varnish relies on rare natural colour sand, save Mineral resources, and raw material sources does not have region to limit;
(3) color of sand of making pottery is calcined as required and is formed, and aberration is little, rich color and lasting, and appreciation effect is good.Internal porous, density is low, and porosity is high, has good thermal and insulating performance, and excellent fire retarding performance, water-intake rate is low, freeze proof anticracking corrosion resistance and good, is excellent structure material;
(4) the present invention goes out best pottery sand-grading ratio by test and Selection, additional appropriate natural sliver, and the true mineral varnish product of preparation has lithotome texture, and simulated effect reaches optimal state;
(5) product preparation method of the present invention is simple, and workability is excellent, functional, nontoxic, tasteless, the no radioactivity pollutes such as splitting resistance, resistance to acids and bases, erosion resistance, harmless, safety and environmental protection.
Embodiment
Embodiment 1
Raw material composition and weight percent proportioning as follows:
Embodiment 2
Raw material composition and weight percent proportioning as follows:
Embodiment 3
Raw material composition and weight percent proportioning as follows:
Embodiment 4
Raw material composition and weight percent proportioning as follows:
Embodiment 5
Raw material composition and weight percent proportioning as follows:
The true mineral varnish product prepared by above-described embodiment 1-5 carries out performance test according to JG/T24-2000 " SAND SLURRY SYNTHETIC EMULSION ARCHITECTURAL COATINGS ", and result is as following table 1:
Table 1 product performance test result
As shown in Table 1, it is qualified that the true mineral varnish product test result prepared by embodiment 1-5 method is all, and product meets the service requirements that building trade standard specifies.