CS256051B1 - Waterproofing material - Google Patents

Abstract

The waterproofing material is based on solid hydraulic binders (cement, gypsum) in an amount of 30 to 60 parts by weight, fillers (silica, andesite, limestone, dolomite slag in an amount of 35 to 65 parts by weight) and modifiers consisting of 2 to 4 parts by weight of cellulose derivatives (carboxymethylcellulose, alkalicellulose, acetylcellulose) or casein, further 0.5 to 3 parts by weight of siloxide, or calcium stearate or urea, and per 100 parts by weight of all solids it contains 10 to 60 parts by weight of a hydrolobizing component. This is an emulsion or dispersion of a copolymer of vinyl chloride with at least one comonomer (alkyl acrylates, mono- and dialkyl maleates, vinyl monomers, butadiene). It is mainly used in construction, especially in waterproofing buildings, flat roofs, hydrostructures and building components.

Description

256051

BACKGROUND OF THE INVENTION The present invention relates to a waterproofing material, respectively. waterproofing material in which the hydrophobic component is a copolymer based on petrochemically available co-monomers, providing a long service life in addition to the hydro-insulating effect.

The waterproofing materials are known to be based on asphalt and tar, waterproofing using tar glues with asphalt coatings, on the basis of plastic films as well as polymer material latexes together with water glass etc. In addition to the considerable need for additional protective concrete coatings, their disadvantage is often the inferior dispersion of hydrophobizing agents in the concrete. Progressive is the hydroisolation mass as well as the method of its production according to MS. of the author's certificate209 997 and even more technically simple and very good reproducible waterproofing and other technical parameters. However, it does not draw on the possibility of several technically available hydrophobic components. However, the present invention extends the range of said co-components as well as the range of long-life waterproofing materials.

SUMMARY OF THE INVENTION The present invention relates to a waterproofing material based on rigid hydraulic couplings, preferably cement and / or gypsum, in an amount of 30 to 60 wt. parts, fillers, basalt fibers, microazbest, crushed andesite, limestone, dolomite, dolomitic limestone, in an amount of 35 to 65 parts by weight and modifiers, consisting of 2 to 4 wt. parts of cellulose derivatives and / or cesin, further from 0.5 to 3 wt. parts of siloxide and / or calcium stearate and / or urea and to 100 wt. parts of all solids contain 10 to 60 wt. parts of the hydrophobic component such that the hydrophobising component is an emulsion and / or dispersion of the vinyl chloride copolymer with at least one comonomer, such as vinyl acetate, alkyl acrylate, acrylic acid, maleic acid, monoalkyl lequinate, dialkyl maleate, 1,3-butadiene, styrene and or-methylstyrene and contain from 0.1 to 5% by weight, calculated on dry matter, of partially saponified polyvinyl acetate and / or polyvinyl alcohol, wherein the monomeric vinyl chloride content is in the emulsion and / or or a copolymer dispersion of sub1. 10% wt. The advantage of the waterproofing material according to the invention is the raw material availability of emulsion or dispersion copolymers of vinyl chloride, high efficiency of the penetration coating, further high resistance to corrosion of water, chemicals and microorganisms and a health emulsion, resp. . a dispersion, both in the formation of the waterproofing material and of the final waterproofing material.

The waterproofing component is an emulsion and / or dispersion of a copolymer prepared by emulsion or microsuspension copolymerization of vinyl chloride with at least one comonomer, such as vinyl acetate, maleic acid, monoalkyl maleate, dialkyl maleate, acrylic acid, alkylacrylate, 1,3-butadiene, styrene and α-methylstyrene. Particularly suitable monoalkyl maleate are monoethyl lequinate, monobutyl maleate, monoisobutyl maleate, 2-ethylhexyl maleate, hydroxyethyl maleate, and the like, such as dialkyl maleate diethyl maleate, diisopropyl maleate, dibutyl maleate, di-2-ethylhexyl maleate, dihydroxyethyl maleate, and the like. Suitable alkyl acrylates are, in particular, ethyl acrylate, iso-propyl acrylate, butyl acrylate, 2-ethylhexylacrylate and hydroxyethyl acrylate. In the case of partially saponified polyvinyl acetate, the most suitable saponification range is from 65 to 80 mol%. Demonomerization of emulsion, resp. the dispersion of the copolymer, the removal of the toxic residual monomeric vinyl chloride is effected by the action of aqueous vapor, purging with a heated inert gas or at least predominantly inert gas. The residual monomeric vinyl chloride should be minimized; must be under1. 10-2 wt.%, Most preferably below 5-10 ~ 3 wt. resp. up to 5.10% 4% by weight The content of copolymerized vinyl chloride should be 50 to 90%, the higher the content of adhesion decreases, while the higher the content of vinyl acetate, acrylic acid and alkyl acrylates, the adhesion of the resin increases. The higher content of copolymerized styrene, 1,3-butadiene and α-methyl-styrene alleviates adbesion but increases the hydrophobicity of the waterproofing agent. material.

The ternary co-polymer emulsion or dispersion should not contain large particle agglomerates, it should be as homogeneous as possible. When producing a dispersion, it is desirable to monomalize the content of emulsifiers and dispersants in the copolymerization environment.

Further details regarding the waterproofing material and its advantages are apparent from the examples. Example 1

Waterproofing compound consisting of hydraulic binders, mainly cement, modifying additives, fillers and aqueous dispersion of co-polymer vinyl chloride-vinyl acetate-n-dibutyl maleate (copolymerized 72% virgin chloride with 17% vinyl acetate and 11% n- Dibutyl maleate at a concentration of 50% by weight with 100 parts by weight of a dry mixture with 30 parts by weight of a dispersion solution containing 25 parts by weight of water and 5 parts by weight of the aqueous dispersion of vinyl chloride-vinyl acetate-n -dibutylmaleinate osušine 50 + 2 ° / o.

The dry mixture is prepared by homogenization of 25% by weight of 51.0 wt. parts of white cement (PC 400), 44.3 wt. parts of acid casein, 1.5 wt. parts of microazbest, 0.5 wt. parts of calcium stearate and 0.20 wt. parts of hexamethylenetetramine.

After mixing, an elastic mass is formed, which is applied at a thickness of 1 to 3 mm on a beech substrate provided with a penetration coating. The penetration coating was previously concentrated by concentrating 20% by weight of the aqueous vinyl chloride-vinyl acetate-dibutyl maleate dispersion. parts of the copolymer.

After about 24 hours of hardening, the waterproofing composition thus prepared produces a smooth and gap-free coating and below 0.0%, according to ČSN73 2578, by densification. The coating is impermeable to water. Example 2.

Waterproofing compound composed of hydraulic binders, fillers and modified additives, prepared by homogenization of 35.0 parts by weight of slagortland cement (SPC -? 325), 59.0 wt. parts of calcium carbonate having a particle size of 0.05 to 0.5 mm, 3.0 wt. parts of acid casein, 2.0 wt. % siloxide and 1.0 wt. parts of the calcium stearate are homogeneously mixed with 30 parts by weight of the aqueous dispersion of terpolymer vinyl chloride-vinyl acetate-2-ethylhexyl acrylate (copolymerized with 36% vinyl chloride with 16% vinyl acetate and 8% 2-ethylhexylacrylate) at a concentration of 17.0% by weight. parts of a co-polymer or with 30 wt. parts of the water dispersion of the vinyl chloride-vinyl vinyl acetate-butyl acrylate terpolymer having a concentration of 17% by weight of copolymer and applied to the substrate by a penetration coating process as described in Example 1. Example 3

On the concrete substrate, a penetration coating with an aqueous dispersion of a vinyl chloride-vinyl acetate-mono-n-butyl maleate copolymer with a dry weight of 5 wt. a portion of the hydraulic mass applied by homogenizing the dry mixture of hydraulic binders, fillers and modifying additives mentioned in Example 2 with 30 wt. with a dispersion containing 25 wt. parts of water and 5 parts by weight of an aqueous dispersion of vinyl chloride-vinyl acetate-mono-n-butylmaleinate copolymer (77% vinyl chloride / 16% vinyl acetate and 7% mono-butylmeateate copolymerized) with a dry weight of 50 + 2% by weight. The crackless coating formed is impermeable to water. Example 4 K 100 wt. parts of the dry mixture containing the hydraulic binder and the additives of Example 2 are mixed with 30 wt. parts of an aqueous dispersion containing 20 wt. % water and 10 wt. parts of the vinyl chloride-vinyl acetate-maleic acid aqueous dispersion polymer, respectively. maleic anhydride (copolymerized 76% vinyl chloride with 16% vinyl acetate and 8% maleic acid) with a dry matter content of 40 + 2% by weight. The resulting plastics material is applied to the base concrete by the homogenisation process as described in Example 1. The crackless coating formed for water is impermeable. Example 5

Similar to Example 2, 100 wt. parts of a dry blend comprising a hydrophilic binder and additives according to Example 2s of 30 wt. parts of water-diluted aqueous dispersion containing 5 wt. of a vinyl vinyl chloride-butyl acrylate copolymer (80% vinyl chloride 15% vinyl acetate and 5% butyl acrylate in copolymer) and 0.5% by weight of copolymer; partially saponified polyvinyl acetate (77% saponified polyvinyl acetate).

An aqueous dispersion of this copolymer containing 0.5% of the partially saponified polyvinyl acetate is made on a concrete substrate with a primer. Compared to the predetermined penetration coatings, its penetration into the concrete is accelerated. Thus, a plastics material similar to that described in Example 1 is applied to the base concrete thus treated for as little as 4 hours. A zero-absorbent, non-viscous coating (according to ČSN73 2578) is also obtained. The coating is impermeable to water. Example 6

The procedure is similar to that of Example 3 except that 3% of mono-n-butyl maleate and 4% of di-n-butyl maleate are copolymerized in place of 7% of mono-n-butyl maleate and also increased to 0 in order to increase the stability of the dispersion. 65% of the partially saponified pole of vinyl acetate. The prepared waterproofing coating is impermeable to the transmission. P r 1 k I a d 7

Emulsion copolymerization of vinyl chloride with 2-ethylhexylacrylate, 1,3-butadiene styrene (weight ratio monomer: water - 1: 2) at 60 + 1 ° C, with an initiating redox system in the presence of finely divided sodium dodecylbenzene sulfonate and sodium lauryl sulfate as emulsifiers in a total amount of 2% by weight / 0.3% by weight of partially saponified polyvinyl acetate and 0.1% by weight of polyvinyl alcohol are prepared to disperse the copolymer with a copolymerized 79% of vinyl chloride, 16.5% of 2-ethylhexyl acrylate, 1.5 of α-methylstyrene and 2% of 1,3-butadiene.

Claims (1)

7 2S »V5> 1 Unconverted monomers are removed from the dispersion after completion of the emulsion prepolymerization, in particular the toxic vinyl chloride by blowing water vapor at 120 ° C and changing the carbon dioxide with nitrogen (64 ° by volume of carbon dioxide) to decrease in monomeric vinyl chloride content in the dispersion! under 5.10 ~ 3%. The dispersion obtained has a dry matter content, a copolymer admixture, of 31.2% by weight. This is diluted with water to 7% by weight. The dry matter is applied to a primer coating resin. The resulting aqueous dispersion and other components are then similarly prepared in Example 2, which is applied to a substrate concrete provided with a penetrating adhesive. The waterproofing material created - the crackless coating is impermeable to water®. PREDMET Waterproofing material based on solid hydraulic binders, preferably cement and / or gypsum, in quantities of 30 to 60 parts by weight, fillers such as siliceous and andesite sands, basalt fibers, micro-asbestos, crushed andesite, limestone, lithomite, dolomitic limestone, in an amount of 35 to 65 wt. parts and modifiers consisting of 2 to 4 wt. parts of cellulose derivative and / or casein derivatives, further 0.5 to 3 wt. parts of siloxide and / or calcium stearate and / or urea stearate and 100 parts by weight of all solids contain 10 to 60 wt. wherein the hydrophobic component is an emulsion and / or dispersion of a vinyl chloride copolymer with at least one comonomer, such as vinyl acetate, alkyl acrylate, acrylic acid, maleic acid, monoalkyl maleate, dialkyl maleate, 1,3 butadiene, styrene and α-methylstyrene, and contains an excess of 0.1 and 5% by weight, calculated on the dry matter, of the paraffinized polyvinyl acetate and the polyvinyl alcohol, wherein the monomeric vinyl chloride content is in the emulsion and / or copolymer dispersion below 1.1% by weight.