RU2469062C1 - Frost-resistant sealing compound - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: frost-resistant sealing compound contains a polymer-based component A as the basic paste and component B as a curing agent. Component A contains a thiol-containing polymer, silicon dioxide, chlorinated paraffin wax, natural chalk, titanium dioxide, tetraethoxy silane or bis-triethoxysilylpropyl polysulphide. Component B contains manganese dioxide - curing agent, chlorinated paraffin wax, natural chalk and ethylene glycol, diphenyl guanidine and sulphur as a vulcanisation accelerator, white soot and water. Before use, components A and B are mixed in ratio of 2-3:1 (pts.wt), respectively.

EFFECT: invention increases frost-resistance with maximum joint movement.

Description

 The invention relates to the field of chemistry, in particular to mastics based on a thiol-containing polymer, intended for external sealing and repair of joints of concrete, reinforced concrete prefabricated building structures, expansion joints of concrete floors, cracks and cracks in industrial and residential construction.

Known two-component sealing mastic, comprising the first component (A) containing synthetic rubber - 100 parts by weight, filler Portland cement, or slag Portland cement; or chalk, or kaolin, or carbon black - 22.5-60.0 parts by weight, asbestos or aerosil - 10.0-20.0 parts by weight, manganese (IV) oxide - 2.0-4, 0 parts by weight, if necessary, technological additive aminoparaffin hydrochloride or ethoxylated alkyl phenols OP-7, OP-10 - 0.0-3.0 parts by weight, organic solvent - 100.0-270.0 parts by weight, and the second component B containing Portland cement or slag Portland cement - 2.4-2.6 wt.h. and paraquinondioxime - 2.0-4.0 parts by weight Mastic is a two-pack, has increased viability and high performance properties: elasticity, adhesive strength, heat resistance; has a wide range of operating temperatures (Patent RU No. 2291178 C1. Two-component sealing mastic. - IPC: C09K 3/10. - Publish. 10.01.2007.). The main disadvantage of the known technical solution is the high cost of obtaining the final product.

Known sealing mastic for waterproofing works based on a polysulfide polymer - "Bitizol-1", including liquid thiokol, epoxy resin, thinner, bitumen, fillers and vulcanizer in the following ratio of components, parts by weight:

liquid thiocol 80-100, epoxy resin 4-6, thinner 15-25, vulcanizer 20-34, bitumen 25-40, white soot 10-15 talc 18-22.

Turpentine or toluene, for example, in which bitumen is dissolved by stirring, is used as a diluent. The resulting bitumen solution is mixed with liquid thiokol brand ФХ-0,5. In order to increase the adhesion and strength properties, the ED-5 grade epoxy resin and mineral fillers — U-333 white carbon and ground talc — are respectively introduced into the mixture. The resulting composition is cured by adding vulcanizing paste No. 30 or No. 31 to it. Paste No. 30 consists (in parts by weight) of a curing agent — manganese peroxide 100, filler — kaolin 100, diluents — dibutyl phthalate 50 and water 100, and a vulcanization accelerator — diphenylguanidine 10. Paste No. 31 consists (in parts by weight) of manganese peroxide 100, dibutyl phthalate 75, aerosil 3 and diphenylguanidine 12. The curing rate depends on the amount of paste added. The well-known mastic is intended for the installation of roll-free roofing in the factory, the monolithic joints and expansion joints, as well as the insulation of junctions and protruding elements of buildings and structures (USSR Author's Certificate No. 382658 for the invention "Mastic -" Bitizol-1 ". - M. Kl. С08h 13/00. - 23. V.1973. Bull. No. 23). This technical solution is taken as a prototype.

The main disadvantage of the known mastic is its low frost resistance, which makes it difficult to apply it to a sealed surface at low negative ambient temperatures.

The main task to be solved by the claimed invention is directed is the creation of a cheaper polymer-based sealing frost-resistant mastic for sealing joints between external building structures of buildings, expansion joints of concrete floors, joints, crevices and cracks with a maximum joint deformation of ± 25% in the temperature range from -50 to + 70 ° С.

The technical result achieved by the implementation of the claimed invention is to reduce the cost of sealing frost-resistant mastic with a maximum joint deformation of ± 25% in the temperature range from -50 to + 70 ° C.

The specified technical result is achieved in that the sealing mastic, according to the proposed technical solution, includes component A as the main paste, containing a thiol-containing polymer, silicon dioxide, chlorine paraffin, natural chalk, titanium dioxide, tetraethoxysilane or bis-triethoxysilyl-propyl polysulfide, and component B as a hardener, containing the aforementioned chloroparaffin and natural chalk, manganese dioxide as a curing agent, ethylene glycol, diphenylguanidine and sulfur as a volcano accelerator zatsiyu, white soot and water, and before applying the mastic components A and B are mixed with each other in the ratio of parts by weight 2-3: 1, respectively.

The analysis of the prior art by the applicant has made it possible to establish that there are no analogues that are characterized by sets of features that are identical to all the features of the claimed sealing frost-resistant mastic. Therefore, the claimed technical solution meets the condition of patentability "novelty."

The search results for known solutions in the art in order to identify features that match the distinctive features of the prototype of the features of the claimed technical solution have shown that they do not follow explicitly from the prior art. From the prior art determined by the applicant, the influence of the transformations provided for by the essential features of the claimed technical solution on the achievement of the specified technical result is not revealed. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

In accordance with the invention, the following compounds are used in the compositions of the components of the frost-resistant sealant.

The first component A:

thiol-containing polymer brand TPM-5, TU 2294-086-05766764 -2010;

chlorine paraffin brand ХП-470, TU 2493-379-05763441-2002;

tetraethoxysilane, TU 2435-419-05763441-2003

or

bis-triethoxysilylpropyl polysulfide (product Si-69, China);

titanium dioxide grade R-02, GOST 9808 -84;

silicon dioxide (Aerosil grade A-200), GOST 14922 -77;

natural chalk of MTD-2 brand, TU 5743-008-05346453 -97;

Second component B:

chlorine paraffin brand ХП-470, TU 2493-379-05763441-2002;

diphenylguanidine, TU 2491-49705763441-2006;

gas sulfur, TU 2112-096-31323949-2003;

white soot BS-120, GOST 18307 -78;

manganese dioxide, GOST 4470 -79;

natural chalk of MTD-2 brand, TU 5743-008-05346453 -97;

ethylene glycol, GOST 19710 -83;

technical water.

The proprietary TPM-5 thiol-containing polymer contains the following components:

Laprol 5003, TU 2226-023-10488057 -95,

Laprol 3603, TU 2226-083-53081079-2009,

T-80 toluene diisocyanate, TU 113-03-17-17 -85,

mercaptoethanol (reagent),

phosphoric acid, GOST 6552 -80.

The essence of the claimed invention is as follows.

Sealing frost-resistant mastic is a two-component system consisting of a paste-like component A based on a thiol-containing polymer and a curing component B.

Component A was prepared as follows.

The calculated quantity of ingredients is loaded into the mixer, in wt.% To the total weight of component A, in the following order: 28.9% of a thiol-containing polymer of the TPM-5 brand, 34.6% of chlorine paraffin HP-470 and 0.6% of tetraethoxysilane or bis-triethoxy -lylpropyl polysulfide (product Si-69) and stirred for 5 minutes. Then, 2.6% of titanium dioxide grade P-02 and 4.4% aerosil grade A-200 were charged and stirring continued for 5 minutes. After that, natural chalk MTD-2 was loaded, and in two doses and in approximately equal proportions, first the first portion, equal to 14.5%, and mixed for 5 minutes, then the second portion, equal to 14.4%, after which produced stirring under vacuum for 5 min and packaging the paste in containers.

Component B was prepared in this way.

The calculated quantity of ingredients in wt.% To the total weight of component B was loaded into the mixer in the following order: 45.1% chloroparaffin HP-470, 0.1% diphenylguanidine grade A, 0.1% gas sulfur, 3.9% white carbon BS-120, 3.9% manganese dioxide, which were mixed for 15 minutes. After that, natural chalk MTD-2 was loaded, and in two doses and also in approximately equal proportions, first the first portion, equal to 20.4%, was mixed for 10 minutes, then 4.7% of ethylene glycol, 1.5 % of water and a second portion of chalk of the natural MTD-2 brand, equal to 20.3%, after which the paste was mixed for 10 minutes, passed through a paint grater and packaged in appropriate containers.

Before applying the sealing mastic, components A and B are mixed with each other in the ratio of parts by weight 2 ÷ 3: 1, respectively, by intensive mixing for 10-15 minutes, then the mastic is applied to the surface to be sealed. Mastic can be applied at ambient temperatures from -50 to + 70 ° C. Mastic viability from 2 to 24 hours

The proposed sealing mastic has a low cost and is not inferior in performance to the known mastics for sealing joints between the external building structures of buildings, expansion joints of concrete floors, joints, crevices and cracks with a maximum joint deformation of ± 25% in the temperature range from -50 to + 70 ° FROM.

Claims (1)

Sealing frost-resistant mastic, including component A as the main paste, containing thiol-containing polymer, silicon dioxide, chlorine paraffin, natural chalk, titanium dioxide, tetraethoxysilane or bis-triethoxysilylpropyl polysulfide, and component B as a hardener, containing the above-mentioned chloroparaffin and natural manganese dioxide as a vulcanizing agent, ethylene glycol, diphenylguanidine and sulfur as a vulcanization accelerator, white soot and water, and I mix components A and B before using mastic tsya with each other in the ratio, parts by weight, 2-3: 1, respectively.