UA55663A - A water-dispersed alkyd dye based on polystyrene artificial latex - Google Patents

Abstract

A water-dispersed alkyd dye based on polystyrene artificial latex. A continuous oil phase contains the water-soluble polystyrene, the emulsifier with a hydrophile-lipophilic balance, the water, the pigment, the active substance of titanium dioxide as a pigment disperser.

Description

The invention belongs to the field of building materials, namely to paint-based aqueous compositions based on synthetic film-forming resins, and personally to compositions based on polystyrene.

Known aqueous dispersions of polymers: polyethylene, polyvinyl chloride, polypropylene, containing as a dispersed phase polymers in a liquid state due to the presence of an organic solvent.

For example, it is known to obtain a stable aqueous dispersion from polymer solutions, based on the dispersion of prematurely prepared solutions: a polymer in an organic solvent and an aqueous solution of a surface-active substance (surfactant) with a hydrophilic-lipophilic balance (HLB) - 2 - 6 in the presence of 0.2 up to 0.9 wt.Oo (from the amount of dispersion) 25 - 6795 of a solution of an organic base in an organic solvent with a polar component of the solubility parameter bat2.48/10.6 (mJ/m3)"? (USSR patent Me1344769|1. How do polymers in the proposed methods use colloxylin, perchlorvinyl resin, copolymer of vinyl chloride with vinyl acetate, copolymer of vinyl chloride with vinylidene chloride.

Disadvantages of water-in-oil paint materials include: 1. the need for emulsification at elevated pressure or temperature; 2. creation of "fibers" during spraying; 3. great fragility; 4. poor adhesion (Z points).

The above-mentioned disadvantages reduce the quality of protective and decorative properties of paint coatings.

An enamel composition in the form of a resin emulsion in a solvent is proposed, which is characterized by the fact that the continuous oil phase contains polystyrene soluble in the solvent, which forms a resin suitable for the formation of a coating and an evaporated solvent; emulsifier with HLB - 18 - 20; water dispersed in the oil phase; pigment dispersed throughout the composition; an active amount of titanium dioxide as a pigment dispersant, with the possibility of changing the composition of the film-former in it in order to obtain oil-emulsion enamel paints (matte and glossy), which have an increased penetrating ability to strengthen the plastered surface.

Thanks to the capillary effects, the emulsion molecules penetrate into the cracks and micro-cracks of the plaster to a depth of 8-1b0mm, as a result, adhesion occurs with the surface on which the plaster is applied, and the coating has increased adhesion.

The water-dispersion composition for coatings contains PSS and PSVS polystyrene, which is dissolved in a solvent

DdStT 1928-79, 10214-78; filler - titanium dioxide (TiOg), emulsifier (soap) and water in the following ratio of components, parts by weight: 1. solution of film-forming substance in solvent 50 2. water 26 - 29 3. emulsifier 0.15 - 0.30 4. filler 10-13 5. pigment 6-9

The paint is used for exterior and interior works on wood, plaster, cardboard and other porous surfaces.

The advantages of the water-dispersion system include a wide base of raw materials for obtaining a film-former, decorative decoration, drying speed, good light fastness, and the ability to form sufficiently strong coatings.

The technological process of obtaining water-dispersion paint includes the following stages: 1. production of a film-forming (artificial latex) solution; 2. preparation of an aqueous solution of surfactant (emulsion); 3. mixing emulsion and latex; 4. dispersion of pigments and filler in the preparatory aqueous dispersion of the film-forming substance.

The essence of the invention is explained by a specific example: 85 g of polystyrene is dissolved in 500 ml of solvent.

An aqueous solution of surfactant is made by dissolving 3g of soap in 300ml of water. While stirring on a high-speed mixer (500 rpm), an aqueous solution of surfactant, 125 g of TiO" and 90 g of ocher are gradually loaded into the film-forming solution. After dispersion, a homogeneous paint is obtained, which is applied to the surface with a brush or roller.

The technical result of the invention is explained by the quality indicators shown in the tables below.

Table 1

Solution External Stability at and Composition Viscosity, | Adhesion, . o : 2. film-forming film-forming, 95 storage form, months. (PS), 96 sec. ball about instability/// | 66 2 yushShsh | 10 | with

Uniform film (dst20833-7519214-80.....ЮюЮюЙ- | 6 ІІ 7777-11 | 20-25| t

Table 2 of the forming, 90 grinding, g/m? drying to fastness, and paint fastness, h.

ЗШЗВ.ШШВШ ШИ at 22", h. 02202747 171115о01 | 1102 | 77105 |. .6 | 5 | 2 ш 2З(15

It can be seen from the given data that the proposed water-dispersion paint provides the expected result.

All paint ingredients are selected from among widely known ones.

Production is carried out using known technologies and typical equipment.

The above shows that the proposed water-dispersion paint meets the patentability criterion "Industrial suitability".

Aqueous dispersion has been tested in experimental and industrial conditions (PES Energy Coal) with a positive result, its production can be adjusted at any time as needed and without complications.

Claims (1)

Water-dispersion alkyd paint based on polystyrene artificial latex, which is characterized by the fact that the continuous oil phase contains polystyrene soluble in the solvent, which forms a resin suitable for the formation of a coating and an evaporable soluble emulsifier with a hydrophilic-lipophilic balance - 18-20, water that disperses in the oil phase, a pigment that disperses throughout the composition, an active amount of titanium dioxide as a pigment dispersant, with the following ratio of components, wt. h.: a solution of a film-forming substance in a solvent 50 water 26-29 emulsifier 0.15-0.30 filler 10-13 pigment 6-9.