Acrylic Material
Water-dispersed acrylic material – the invention sufficiently known. The first related to the development of twentieth and thirties, but then their development has prevented World War II. Triumphal procession waterborne acrylic materials began immediately after the war, and it was understandable, because many had to be restored and for limited funds. Unfortunately, the "iron curtain" was and is an insurmountable obstacle. Soviet industry has not gone further than PVA glue, bustilat and primitive water-dispersion paints based on PVA, suitable only for malootvetstvennyh works. As a result, the Soviet Union left behind in these matters, forcing its citizens paint everything banal oil paint, putty and glue the oil-filler, while in Europe all this has long been a subject of folk tales. Because of the backlog in the production of advanced materials, there serious lag in construction technology.
Builders were forced to work not with what you need and the fact that there is. When in the early nineties, the situation began to change radically, the builders were largely not willing to develop new water-dispersion acrylic materials. Most textbooks on the subject seriously out of date, many aspects were not covered at all in our literature and have been very strong stereotypes about the poor level of quality of water-dispersed materials. Water-dispersed materials are produced mainly based on three types of dispersions: polyvinyl acetate (PVA), styrene-butadiene (BS) Acrylic (AK). All three types have their advantages and disadvantages. Since the dispersion of PVA is indispensable in adhesives for wood, but the colors on the basis of their nevodostoykie and therefore have a very narrow scope, despite the low price.
True, there are different Water-resistant PVA copolymers, yet they are inferior in color acrylic dispersions and their cost is quite high. Butadiene dispersions in good adhesives that require water resistance, but have limited light resistance, which makes them undesirable for use outside of work. Paint on this type of variance inexpensive, but can only be used inside buildings. Acrylic dispersion is more expensive than listed above, but they are the most versatile. It is no accident that Europe is based on acrylic dispersions is more than 70% of all manufactured inks. It should be noted that the acrylic water-dispersion paints are not only tightly captured construction market in Europe, but also invade the more sophisticated industries such as automobile and shipbuilding. What is the advantage over oil and alkyd paints: 1) Durability. Acrylic paint on the facade is 8 – 12 years, some cases – up to 30 years, oil 1.5 – 3 years, alkyd 3 – 5 years. 2) Environmental safety. Paints do not emit harmful substances (primarily solvents) as the substrate, and in operation. 3) Good hygienic properties. Paints form a "breathable" coating, permeable to vapor, but impermeable to liquids. 4) Fire – and explosion protection, both during storage and application, and during the operation. 5) Easy and convenient to use. Paint dry 30-40 minutes at room temperature and normal humidity. 6) Affordability. Environmental, fire safety and hygienic water-dispersion paints was the reason for the prohibition by law in several North American states, solvents, paints in all areas of construction. In Europe, also published a number of laws restricting the use of materials on the basis of solvents. Russia, though with lag, but also moving in the right direction. For example, there are restrictions on the use of materials on the solvent in children's hospitals.
Tags: construction of life, Technology Repair