RU2287506C1 - Acryl composition for finishing work - Google Patents

Abstract

FIELD: building industry.

SUBSTANCE: invention relates to manufacturing acryl resins-base building composition materials used in internal and external finishing of compartments of industrial and civil designation, in particular, in making pouring flooring covers, protective and finishing materials and pouring compounds. Acryl composition for finishing works comprising a binding agent, quarts sand as a filling agent, plasticizing agent, hardening agent and water involves 40-60% aqueous dispersion of copolymer of butylacrylate, methylmethacrylate and methacrylic acid as a binding agent, tributyl phosphate as a plasticing agent, Portland cement M400 as a hardening agent and, additionally, it comprises acryl-urethane thickening agent of associative type "Polifob TR-117" wherein components are taken in the following ratio, wt.-%: 40-60% dispersion of copolymer of butylacrylate, methylmethacrylate and methacrylic acid, 15.0-30.0; acryl-urethane thickening agent of associative type "Polifob TR-117", 0.1-0.2; quartz sand, 35.0-50.0; tributyl phosphate, 0.15-0.25; Portland cement M400, 8-12, and water, the balance. The composition can comprise additionally pigment in the amount up to 11 wt.-%. Invention provides enhancing mechanical strength of cover, its adhesion to surface and decreasing water absorption.

EFFECT: improved and valuable technical properties of composition.

2 cl, 2 tbl

Description

The invention relates to the field of construction, and in particular to the production of building composite materials based on acrylic resins used for interior and exterior decoration of industrial and civil premises, in particular, for the manufacture of bulk coatings for floors, protective and finishing materials, casting compounds.

Known polymer-cement composite material / Bazhenov Yu.I. Concrete technology. - M .: Higher school, 1978, p. 400-401 / for finishing a concrete surface of the following composition, wt.%:

Mineral filler 50-72 Aqueous dispersion of vinyl chloride ester, acrylic and methacrylic acids 2-12 Cement 25-45 Fatty Acid Salts 0.5-2.0 Plasticizer 0.1-2.3 Pigment 0.7-2.5 Fiber 0.1-2.0

Known composite material used for the surface treatment of building materials / patent No. 2090530 MKI C 04 V 26/06, publ. 09/20/1997 /, including the following components, wt.%:

Methyl Methacrylate Monomer 5-25 Benzoyl peroxide 0.2-1.5 Aniline 0.05-0.5 Emulsion Production Wastes polystyrene based polystyrene 2.5-5.0 Trioxyethylene-α, W-dimethacrylate 0.55-5.0 Mineral filler 71.7-83.0

This polymer-mineral composition has high adhesive strength and heat resistance, however, the use of emulsion polystyrene based on polystyrene as a waste polymer is unsafe from an environmental point of view due to the toxicity of the styrene polymer.

Closest to the proposed invention by technical essence is a marble composition for finishing work / patent RU No. 2211940 IPC C 04 V 26/06, publ. December 20, 2003 /, accepted by the authors as a prototype.

The composition contains, wt.%:

Copolymer Binder:

Polyvinyl Acetate Dispersion MDP-50 10-12 Dispersion acrylic copolymer A-6000 3.5-4.5

Fillers:

Marble flour 35-37 Dolomite flour 3.5-4.5 Marble chips 20-22 Quartz sand 15-25 Preservative antiseptic 0.1-0.3

Softener:

Cellulose 0-0.6

Fixer and hardener:

Ammonia (25% aqueous solution) 0.06-0.08 Pigment - titanium linen 2.2-3.5 Water Rest

However, this composition has insufficient adhesion of the composite layer to the surface, has low strength indicators (impact strength, tensile and compressive strength) and high water absorption.

The technical problem solved in the framework of the present invention is the creation of a building acrylic composition with high mechanical characteristics, improved adhesion of the composite layer to the surface, as well as reduced water absorption.

The solution to the above problem is achieved due to the fact that the acrylic composition for finishing work, including a binder, filler - quartz sand, plasticizer, hardener, water, as a binder composition contains a 40-60% aqueous dispersion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid , contains tributyl phosphate as a plasticizer, Portland cement M400 as a hardener, in addition, it additionally contains an associative type polyphob TR-117 thickener, in the following co the ratio between the components of the acrylic composition, wt.%:

40-60% aqueous dispersion of butyl acrylate copolymer, methyl methacrylate and methacrylic acid 15.0-30.0 Acrylic-urethane associative thickener type "Polyphob TR-117" 0.1-0.2 Quartz sand 35.0-50.0 Tributyl phosphate 0.15-0.25 Portland cement M400 8-12 Water Rest

The composition may further contain pigment in an amount of up to 11 wt.%.

Used in the claimed composition, a 40-60% aqueous emulsion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid is manufactured by the industry under the brand name "Diacam" according to TU-2241-039-07507802-2001.

A 40-60% aqueous acrylic copolymer emulsion is prepared by emulsion polymerization of butyl acrylate, methyl methacrylate and methacrylic acid in the presence of a water-soluble polymerization initiator and an anionic emulsifier.

Acrylic copolymer dispersion is a component that provides binding and film-forming properties of the material, as well as good transparency and weather resistance of the coating.

As a thickener, in order to improve rheological properties, the composition contains an associative-type polyphob TP-117 thickener of Union Carbide company, in the form of water-soluble polymers, which include acetaldehyde 0.001%, ethyl acrylate 0.002%, polymer additives 40% and water 60%. It is a viscous, whitish liquid (hygienic certificate for Polyphobe TR-117 from Union Carbide).

The quartz sand of different fractions used as a filler (GOST 90-77-92, GOST 15045-78, GOST 22551-77) gives the composition strength, density. Portland cement M400 (GOST 10178-85) is used as a hardener.

Tributyl phosphate (TU 6-02-73384) is used as a plasticizer and antifoam, the presence of which affects the mechanical properties of the coating, making the material more plastic.

The technological process of manufacturing a building composition based on acrylic resins consists of the following operations:

- preparation of a mixture of liquid components (dispersion, plasticizer, thickener);

- preparation of a mixture of dry components (quartz sand, cement, pigment);

- mixing liquid and dry components to achieve complete homogeneity of the mixture.

Testing of samples of finished products is carried out according to standard known methods.

The composition of the claimed composition in laboratory conditions was prepared and tested in the entire range of the content of each component. For comparison, similar tests were carried out for the composition of the prototype.

The technical nature of the invention is illustrated by the following experimental data.

Specific examples of the composition of the composition with different content of components in comparison with the prototype are presented in table 1.

The test results of samples of the obtained building compositions are given in table.2.

From the data given in table. 2, it can be seen that the best physical and mechanical properties have material samples having a composition that falls within the claimed limits (compositions 2, 3, 4).

The compositions according to examples 1, 5 with exorbitant quantitative values of the content of the components have worse characteristics compared to the claimed samples of the composition, so example 1 exhibits lower adhesive strength of the composite layer, and example 5 low water resistance.

As follows from the tabular data, the acrylic composition according to the invention surpasses the well-known, taken as a prototype, in such strength indicators as impact strength, tensile and compressive strength, as well as adhesive strength, while ensuring a high level of water resistance, i.e. the present invention solves the problem.

So, for example, the use of the proposed technical solution allows more than 50% to increase the adhesive strength of the material compared to the prototype and 25% - impact strength.

Thus, an acrylic composition for finishing works has been developed, which provides a coating having high mechanical strength. Low water absorption of the claimed composition allows you to maintain a high level of physical and mechanical characteristics of the coating over a long period of operation and thereby increase its wear resistance.

The created acrylic composition for finishing works with a wide range of its use is non-toxic, fireproof, prepared by simple technology on standard equipment, easy to use and retains its technical characteristics during storage.

Table 1
Composition components The content of components in the composition, wt.% Prototype Case Studies one 2 3 four 5 Polyvinyl Acetate Dispersion MDP-50 10-12 - - - - - Dispersion acrylic copolymer A-6000 3.5-4.5 - - - - - 40-60% aqueous dispersion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid 14.2 15.4 24.6 28,2 31,0 Quartz sand 15-25 35.5 39.6 44.8 48.9 51.0 Marble flour 35-37 - - - - - Dolomite flour 3.5-4.5 - - - - - Marble chips 20-22 - - - - - Tributyl phosphate - 0.3 0.20 0.25 0.15 0.10 Cellulose 0.4-0.6 - - - - - Portland cement M400 - 12,4 12.0 10.0 8.0 7.5 Ammonia (25% aqueous solution) 0.06-0.08 - - - - - Acrylic-urethane thickener associative type "Polyphob TR-117" - 0.09 0.1 0.15 0.2 0.2 Pigment 2.2-3.5 0 eleven 2,5 0 0 Water Rest 37.51 21.7 17.70 14.55 10,20

table 2 Physical and mechanical properties Prototype Case Studies one 2 3 four 5 Tensile strength, MPa 36.5 - 38.5 39,4 40.5 43,2 Compressive strength, MPa 75.7 85.0 87.7 93.8 92.8 96.8 Impact Strength, J 4.0 5,0 5.2 5.3 5.2 - The adhesive strength of the composite layer, MPa 0.75 1,0 1.20 1.25 1.25 1.20 Water absorption,% 0.8 - 0.2 0.2 0.4 0.5

Claims (2)

1. Acrylic composition for decorating, containing a binder, filler - quartz sand, a plasticizer, hardener, water, characterized in that as a binder the composition contains a 40-60% aqueous dispersion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid, as a plasticizer contains tributyl phosphate, Portland cement M400 as a hardener, in addition, the composition additionally contains an associative type polyphob TR-117 acryl-urethane thickener, in the following ratio, wt.%: 40-60% aqueous dispersion of butyl acrylate copolymer, methyl methacrylate and methacrylic acid 15.0-30.0 Acrylic urethane thickener associative type "Polyphob TR-117" 0.1-0.2 Quartz sand 35.0-50.0 Tributyl phosphate 0.15-0.25 Portland cement M400 8-12 Water Rest 2. Acrylic composition for finishing work according to claim 1, characterized in that it additionally contains pigment in an amount of up to 11 wt.%.