SU1758033A1 - Polymeric solution - Google Patents

Abstract

The invention relates to composite building materials and can be used to seal joints, joints, cavities, etc. in the construction of buildings and structures, as well as for sealing industrial reinforced concrete water storage tanks. The aim of the invention is to increase adhesion to the wet and dry surfaces of ceramics and concrete, to increase the volume expansion, to prevent the layer from melting to 5 mm and to recycle waste. Polymer solution contains, May. %: polyisocyanate 100, casterol 10-14, fluorite tail based on SI02 80-100, bottom residues of tetrahydrofuryl alcohol based on tetrahydrofuryl alcohol 26-30. Adhesion to wet ceramics is up to 10.2 MPe, to dry - up to 9.9 MPa, adhesion to ceramics after 180 days of exposure to water is up to 7.7 MPa, after 200 freeze-thaw cycles to 7.0 MPa, increase in adhesion to concrete after 180 days of exposure in water up to 8.2 MPa, curing time on dry concrete - up to 1.8 hours, on wet concrete - up to 1.5 hours, volume expansion is up to 15%, melting on the vertical surface of the layer 3-5 mm is not observed. 2 tab. cl

Description

The invention relates to the field of composite building materials and can be used as a composition for sealing joints, joints, cavities, etc. in the construction of buildings and structures, as well as for sealing industrial reinforced concrete water storage tanks.

The aim of the invention is to increase the adhesion to the wet and dry surfaces of ceramics and concrete, reduce the curing time, increase the bulk expansion, prevent flooding of up to 5 mm and recycle production waste.

As a polyisocyanate, a polyisocyanate of brand T (TU 113-03-29-22- 84) with an increased content of NCO-groups is used. Industrial name - Surizon P85.

The appearance is a dark brown liquid.

It is a composition of the general formula ./STVггд

(OCNHy-CH2-4 -NCO) n

SP 00

about s

with a high content of 2.4, and 4.4, isomers of diphenylmethane diisocyanate (MDI).

Production method - phosgenation of the condensation product of aniline with formaldehyde on a solid catalyst.

The content of isocyanate groups is not less than 30%, diisocyanates - 50-77%, hydrolizable chlorine - 0.3%, the basic substance - up to 99.5%.

Pour point - 0 ° С.

Vat residues from tetrahydrofuryl alcohol production - reagent B-2 (TU 55-77-75) are used as a matching agent.

Forms up to 10% of the quantity of marketable tetrahydrofuryl alcohol in hydrolysis plants.

Appearance - oily liquid from light to dark brown color, well soluble in water.

Density is 1.07-1.15 g / cm3.

The dry residue after drying at 100 ° C is 53.7%. The hydroxyl number is 16.5-17%.

The composition uses 50% aqueous solution of the reagent BB-2.

As a thixotropic filler, the waste of the concentration plant is used - fluorite tails, which are non-recyclable waste,

They give the composition the necessary in bone, promote workability, have the ability to swell, which greatly enhances the effect of expansion of the composition during its curing.

The chemical composition of fluorite tailings is characterized by the content of oxides,%:

 75.22 9.5 Fe2031.62

Tyu2 0.44 CaO 4.2 MdO 0.9

50zO, 3№200,64 K202,89

COA 0.77 Other impurities Else

As a plasticizer, use kasterol - castor oil (TU 6-10-1283-77), oxidized with oxygen from the air.

Polymer technology:

at the 1st stage, polyisocyanate is poured into the mixer, the plasticizer and stirred for 1-2 minutes;

at the 2nd stage, the thixotropic filler is loaded — the fluorite tail — and mixed for another 2 minutes;

in the last stage 3, bottoms from the production of tetrahydrofuryl alcohol are poured and mixed for 2-3 minutes to achieve a homogeneous mixture.

The mixing cycle lasts 5-7 minutes. Variants of compositions on the proposed

the invention and the selected prototype are given in table 1.

Tests of mechanical properties, performed by standard methods, are given in Table. 2

Example 1. According to the described technology, a polymerization solution at 20 ° C is prepared with the following composition: polyisocyanate - 100, bottom residues of tetrahydrofuryl alcohol production - 26, fluorite tails - 80, plasticizer - 10.

Example 2. According to the described technology, a sealing polymeric solution is prepared at 20 ° C with the following composition: polyisocyanate-100, distillation residues from the production of tetrahydrofuryl alcohol - 28, fluorite crusts - 90, plasticizer - 12.

Example 3. According to the described technology, a sealing polymeric solution at 20 ° C is prepared with the following composition: polyisocyanate - 100, distillation residues of tetrahydrofuryl alcohol production - 30, fluorite tails - 100, plasticizer - 14,

Claims (1)

The invention includes a polymeric solution comprising poly-m-cyocyanate, a plasticizer and a thixotropic mineral filler, characterized in that, in order to increase adhesion to the wet and dry surfaces of ceramics and concrete, reduce the curing time, increase the volume expansion, prevent the layer from creeping down to 5 mm and utilization of production wastes, it contains casterol as a plasticizer, as a thixotropic filler - fluorite tails based on Si02 and additionally residues of tetrahydrofuryl alcohol n tetrahydro furfuryl alcohol based on the following ratio of components, May. including: Polyizolcyanate100 Kasterol10-14 0 Fluorite tails based on SI0280-100 Vat residues of tetrahydrofuryl alcohol ne based on tetrahydrofuryl alcohol 26-30