SU1147703A1 - Polymer mortar for coating and adhesion - Google Patents

Abstract

POLYMERALANT FOR COATING AND ADHESION, including polyisocyanate, head fraction from distilled ": No." "/" ..... / rosin, portland cement, quartz sand, characterized in that, in order to increase the solution thixotropy and adhesion to wet concrete and ceramics, it contains quartz sand with a moisture content of 10-15% and, additionally, oligoether cyclocarbonate and fine chalk with a coarsening ratio of components, wt.h .: 100 Polyisocyanate Head fraction from 2-4 rosin distillation 120-160 Portland Cement Quartz sand 120 -160 with humidity 10-15% 20-40 Oligoether cyclocarbonate Fine ate 5-25 chalk

Description

4 1 The present invention relates to building materials, and, in particular, to polymeric-mortar mixtures used to glue natural stone, steel and ceramic tiles to brick and concrete. Polymer solution 1 3 is known, including in masts.: Oligoaryl isocyanate 100 Head fraction from distillation of rosin 0.5-2.5 Head fraction from distillation of disproportionated rosin 10-25 Diethoxyfurfurylsiloxane0, 5-1.5 Portland cement 180-200 Sand 75- 80 The closest to the proposed technical essence and the achieved result is the C2l polymeric solution, including in mash.: Polyisocyanate K 100 Head fraction from rosin distillation 0.5-1.5 Head fraction from distillation of disproportionate rosin 10-35 Portland cement 110 -140 Quartz first sand 110-140 disadvantage of the known compositions is relatively low thixotropy solution and a small adhesion to wet concrete and ceramics object of the invention - povshenie tick sotropnosti solution and adhesion to wet concrete and ceramics. The goal is achieved by the fact that a polymeric solution for coating and gluing, including poly isocyanate, the head fraction from rosin distillation, portland cement and quartz sand, contains quartz sand with a moisture content of 10-15% and additionally Oligoether cyclocarbonate and chalk fine on the next ratio in May .p .: Polyisocyanate 100 Head fraction from rosin distillation2-4 Portland cement 120-160 Quartz sand with a moisture content of 10-15% 120-160 3 Oligoether cyclocarbonate 20-40 Finely dispersed chalk 525 For the manufacture of polymeric resin ra use the following materials; Portland cement M 400; silica sand with a particle size of 0.2 mm; fine chalk; Polyisocyanate K with a content of 28.5–30% of NCO– groups, the head fraction from the distillation of rosin (HD), which contains 40–50% resin bwps, 11–20% fatty acids, 20–30% fatty acids, saponified up to 1.0%; Oligoether cyclocarbonate containing po 5 epoxy groups; cyclocarbonate groups 23.2-25%, water 0.09-1.0%. Polyisocyanate K (TU 6-03-29-2-77) poluchak) t with full distillation of volatile components and with partial distillation of 4,4-diphenylmethane diisocyanate from polyisocyanate grades A and B (cubic residue). Liquid density of 1.26 kg / l at. The vapor pressure is 0.003 mmHg. at. The content of diphenylmethane diisocyanate is 20–50%, the content of three nuclear isocyanates is 15–30%, and the content of isocyanate groups is at least 28.530.5. Oligoether cyclocarbonate with a molecular weight of 800 + 20, a content of cyclocarbonate groups of 23-25%, a viscosity at 50-70 P, and contained 1% volatile substances 0.1%, water 0.04-0.1% and epoxy groups 1.5 % The polymer solution is prepared in mortar mixers of forced action or by hand. The prepared polymer mortar compositions do not vary in fluidity (melting) and adhesion to various surfaces with different preparation. Made for testing five compositions of the proposed polymer solution - glue and three of the composition of the prototype. The compositions are presented in table. 1, The following materials are used for the preparation of these polymeric solution compositions: Portland cement M 400, silica sand with a particle size of 0.2 mm, fine chalk, polyisocyanate K with an NCO-rpynn content of 28.5-30%, the head fraction from rosin distillation (DG). Oligoether3

cyclocarbonate with an epoxy content of 1.5%, cyclocarbonate groups 23-25.

For samples of each composition, the values of adhesion at separation and shear to wet concrete under normal conditions after prolonged holding of samples in water, as well as after 100 cycles of freezing and thawing, are determined.

The test results are shown in Table. 2

Preservation of high adhesive strength is ensured by the use of

1477034

oligoether cyclocarbonate in combination with wet sand and chalk. According to laboratory tests with an increase in sand moisture content of over 15%, porosity occurs in the macrostructure, which leads to the fragility of the polymer solution. When the sand moisture is less than 10%, the structuring process is incomplete, which leads to a decrease in the strength of the polymer solution

The proposed polymer solution can be used to glue the cladding material to the eaves and concrete.

Table 1

100 100 100 Polyisocyanate K Head fraction from distillation of rosin 1.9, 2 3 (DG) Head fraction from distillation of disproportionate rosin 19 20 30 Oligo ether cyclocarbonate 110 120 140 Portland cement Mel finely dispersed

Strength at separation (wet concrete), MPa

7.5, 8.5 8.6 8.9 7.3 15

table 2

8.8 8.2 8.0 00 100 100 100 100 4 4.1 1.5 1.0 0.5 0.5 10.0 25.0 0.30 40 41 130 140 60 140 25 26

Strength at separation from ceramics after 180 days of pulling out in water, MPa 2.0

2.1 5.8 5.3 5.4 1.9

Continuation table

6.3 4.9 5.1

5.9 5.5 5.7 2.7

6.2 5.0 4.8

Claims (1)

POLYMER SOLUTION FOR COATING AND ADHESIVE, including polyisocyanate, the head fraction from the distillation of rosin, Portland cement, quartz sand, characterized in that, in order to increase the thixotropy of the solution and adhesion to wet concrete and ceramics, it contains quartz sand with a moisture content of 10-15% and additionally - oligoestercyclocarbonate and finely divided chalk in the following ratio of components, parts by weight: Polyisocyanate one hundred Head fraction from rosin distillation 2-4 Portland cement 120-160 Quartz sand with humidity 10-15% 120-160 Oligoestercyclocarbonate 20-40 Fine a piece of chalk 5-25 <to