LT3860B - Method for making moulded stone - Google Patents

Abstract

Invention applies to the chemical industry. The invention aims to expand the opportunities of a decoration range and technological process and increase the working life of the product. The stone bulk is produced after mixing 2-4 stone bulks with a contrast stone pigment in a form of a dry powder with uniform portions and consists of the following components in mass %: polyester epoxy (PE) 12.5-25.0; accelerator (cobalt compounds) 0.5-6.0 of PE mass; pigment in a form of dry powder 1.0-2.0 of PE mass; hardener (methyl ethyl compounds) 1.5-2.0 of PE mass; aggregate of non-organic materials (marble sand and dust of the same, quartz sand, pearlite, aluminium hydroxide) 60.0-87.5; besides that, components comprising of the stone bulk and portions of 2-4 stone bulks are mixed using the mixer method.

Description

The invention relates to the chemical industry, in particular to the production of cast stone. Known method for producing cast stone using a composition of a special composition of resin (polyester resin), catalyst (cobalt solution), inorganic filler (marble powder, lime, quartz) and coloring agents and catalyst - butanone peroxide solution (Belgian company CITADOS BEND) typing).

Known method for producing cast stone using a composition of polyester resin (65% by weight) and filler (35% by weight) of the following components, based on the content of polyester resin, is NLC 10 - 0.1 inhibitor, accelerator NL 51 - 0.1, BUTANOX H 50 - 1.5, in the form of a base paint paste. Adds to the monochrome mass in the form of a paint paste, which causes spills in the product. The mass is agitated by screw (French company TERMATUBE prospectus).

In the known method of producing cast stone, screw mixing is not complete and of good quality. This results in an unevenly distributed, heterogeneous mass. Multiple masses of different chemical compositions in the same proportions cannot be mixed well by screw. Products made from stone masses obtained in this known way have a limited decorative range and are not characterized by durability (resistance to temperature fluctuations), which is most important for cast marble products.

The object of the invention is to extend the range of decorativeness, the possibilities of the technological process and to increase the durability of the product.

The stated object is achieved by the fact that in the method of producing a cast stone using a polyester resin, a catalyst, an inorganic filler and a coloring agent, the stone mass is obtained by mixing 2-4 stone masses with contrast pigments in dry proportions, consisting of these components, % by weight:

polyester resin (PE) 12.5 - 25.0, accelerator (cobalt compounds) 0.5 - 6.0% by weight of PE, pigment in dry powder 1.0 - 2.0% by weight of PE, hardener (methylethyl compounds) 1 , 5 - 2.0% by weight of PE, inorganic aggregate (marble sand and dust, quartz sand, perlite, aluminum hydroxide) 60.0 - 87.5, additionally containing parts by weight of stone and 2 - 4 by weight of stone mix in a mixer.

Quantity limits for the constituents of the rock mass are optimal. If the aggregate content is less than 60% by weight, the product performance is worse. If the fill mass is greater than 87.5% by weight, the porosity of the product is formed and complex configurations cannot be formed. The simpler the shape of the product, the greater the mass of the filler, but within the stated ceiling. One of the major factors in the expansion of the product as the temperature rises is the amount of filler in the polyester resin (PE) and inorganic materials. Lowering the accelerator mass below the lower limit will not produce a positive result, and increasing its mass mass is not appropriate as the result remains the same. If the hardener contains 1.5% by weight, there will be no fully polymerized resin (free styrene groups) and the required stone characteristics will not be obtained. A higher amount of hardener (eg 2% by weight) in the mass does not affect the result and does not improve the properties of the stone. The amount of pigment is selected depending on the desired color intensity, tone.

Example of stone mass production.

Initially, 1 kg of polyester resin (PE), for example, S 380 (Finnish production) was mixed with 0.04 kg of accelerator NL 49 P (Finnish production). BUTANOX M 50 0.02 kg is then added to the mass. The amount of accelerator and hardener in the mass depends on the amount of polyester resin added to the mass. 0.1 kg of the pigment in the form of a dry powder, such as titanium oxide, is added to the well-mixed mass. After mixing, add 5 kg of inorganic filler to the mass, such as marble sand. It also uses the following inorganic fillers: quartz sand, pearlite, aluminum hydroxide. The stone mass is mixed with a mixer mixer.

In an analogous manner to the example described, stone masses were obtained which consisted of polyester resin and inorganic filler quantities and the elongation characteristics of the product at an initial temperature of 20 ° C are given in the table.

To compare the results, a stone was obtained according to the French firm TERMATUBE technology, the elongation index of which is given in the table.

Example of Plumbing Products.

It uses glass-plastic shapes for plumbing and metal for decorative panels. The working surface of the molds is covered with a layer of silicone wax and polished with cotton wool. This layer is then sprayed onto the polyester resin with improved properties to provide a protective layer. The prepared form is dried in a drying chamber

At 40 ° C. Once removed from the drying chamber, the mold is placed on a vibrating table which vibrates (6000 - 9000 rpm) into the molds for 1-2 minutes to compact it. Stone mass polymerization takes place for 30 - 40 minutes. After polymerization, the article is removed from the molds and stored in an aging chamber at 50-60 ° C for 6-8 hours.

Table

Yesterday no. Stone mass composition,% by weight Elongation% at initial 20 ° C for temperature * PE Neorg. hunts fillers 30 ° C 40 ° C 50 ° C 60 ° C 1. 15th 85 - 0.01 0.015 0.02 2. 18th 82 0.005 0.01 0.015 0.02 3. 20th 80 0.005 0.02 0.025 0.04 4. 22nd 78 0.01 0.03 0.04 0.045 5. 25th 75 0.015 0.04 0.05 0.075 6th According to prototype 0.01 0.04 0.055 0.105

* Test paths identified using indicator.

The method of obtaining a cast stone is compared with that of a French firm

TERMATUBE has a number of advantages in stone extraction. In particular, the capabilities of the technological process are expanded. The use of a mixing method ensures complete and high quality mixing of 2 - 4 stone masses of different chemical composition in equal proportions. The contrasting distribution of the weight of the product gives it a special ornamentation - an image of natural marble. In addition, the products obtained are resistant to long-term plus temperatures and temperature fluctuations (see table). The frost resistance of the products exceeds 100 cycles. This parameter is determined by the water absorption, which is equal to 0.2% (according to Gost 7025-78).

DEFINITION OF INVENTION

Claims (1)

DEFINITION OF INVENTION The method of producing cast stone using a polyester resin, a catalyst, an inorganic filler and a dyeing agent for the production of stone pulp is characterized in that the pulp is obtained by mixing 2-4 parts of stone pulp with contrast pigments in the same proportions, % by weight: polyester resin (PE) 12.5 - 25.0, 0.5 - 6.0% by weight of PE, 1.0 - 2.0% by weight of PE, 1.5 - 2.0% by weight of PE, accelerator (cobalt compounds) pigment in dry powder hardener (methylethyl compounds) filler of inorganic substances : marble sand and its dust or quartz sand, or perlite, or aluminum hydroxide 60.0 - 87.5, in addition to mixing the stone constituents and 2 to 4 parts by weight of the stone.