Sealant

 

(57) Abstract:

The invention is used for sealing, corrosion protection and protection against abrasive destruction of various materials like metal, wood, rubber, ceramics, brick, concrete, roofing material and other Sealant includes the best choice of thermoplastic elastomer, fillers, adhesive, antioxidant, organicheskiy solvent modifiers that increase the resistance of the sealant and its resistance to aggressive media, such as connections quinoid type, for example o,o-bis-(1,3,5-tri-tert-butyl-4-oxo-cyclohexadiene-2,5-yl)-p-anthinanixon or,o-bis-(1,3,5-tri-tert-butyl-4-oxocyclohexa-2,5-yl)-2-methyl-5-propyl-p-anthinanixon, or quinoid compounds in combination with metal oxides, for example with manganese dioxide, sulfur and/or metal oxides in combination with organic sulfides, such as tetramethylthiuramdisuphide, tetraethyleneglycol, 2-mercaptobenzothiazole, di-(2-benzothiazolylthio), or chlorides of metals of variable valence. The sealant has a higher heat resistance and resistance to aggressive environments, such as solvents, mineral oils, acids, alkalis and salts. 1 C.p. f-crystals, 3 tables.

The invention otnositsea the manufacture of concrete floors, roof panels of aluminum and other alloys, repair bituminous bituminous coatings, corrosion protection and abrasion destruction unprimed metal, concrete and brick surfaces:

- constructions, which are used outdoors and indoors;

- pipelines, drainage channels and pits;

- chemical equipment (when exposed to diluted mineral acids, alkalis, salts);

- hull, heads and wings of the car.

Operating temperature sealant from minus 60 to plus 120C.

There are various sealants similar purpose. For example, pasta AM-5 can be used for sealing joints in external walls precast concrete, sealing of window openings to protect from atmospheric corrosion (A. L. Labutin. Anti-corrosion and sealing materials based on synthetic rubbers; LH, 1982; S. 127-128). Disadvantages paste AM-5 is its dvukhkomponentnoi, small tear resistance, lack of durability, high values of residual strain and lack of resistance to aggressive environments.

Known sealant on the basis of butadiene-styrene thermoerosional destruction of bodies and bottoms of cars and refrigerator cars. The disadvantages of these and other sealants on the basis of the best choice of thermoplastic elastomers is a low heat resistance, weather resistance and cohesive strength of solid surfaces.

Known sealing composition (Patent of Russia 93058267/04, From 09 To 3/10 from 23.08.93, and gasket (Patent of Russia 93058266/04, From 09 To 3/10 from 23.08.93) and sealant (Patent 930058268 from 23.08.93), designed for the sealing and caulking of building structures, gluing construction tile, linoleum, wood, metal, rubber. The disadvantages of these sealants are also not sufficiently high heat resistance and resistance to aggressive environments.

The closest to the technical essence and the achieved result and prescription-based (definiltely TPR DST-R) sealant is taken as a prototype (Patent of Russia 93058266/04, 6 09 To 3/10 from 23.08.93), including the best choice of thermoplastic elastomer, a filler, an antioxidant, an organic solvent, the resistance of which is shown at maximum temperature +70 C, and the resistance to aggressive media is not in the material description.

The technical task of the present invention is to provide hermetically oil, acid, alkali and salt.

The technical result is achieved by the fact that the developed sealant, including the best choice of thermoplastic elastomer, adhesive, filler, antioxidant, organic solvent further comprises a chemical modifiers that improve the performance properties of the sealant, namely connection quinoid type, for example o,o-bis-(1,3,5-tri-tert-butyl-4-oxo-cyclohexadiene-2,5-yl)-p-anthinanixon or o,o-bis-(1,3,5-tri-tert-butyl-4-oxocyclohexa-2,5-yl)-2-methyl-5-propyl-p-anthinanixon, or quinoid compounds in combination with metal oxides, for example with Mno2or metal oxides in combination with sulfur and organic sulfides, such as tetramethylthiuramdisuphide, tetraethyleneglycol, 2-mercaptobenzothiazole, di-(2-benzothiazolylthio), or chlorides of metals of variable valence, such as the chlorides of iron, zinc, tin, in the following ratio of components:

The best choice TPR 100

The adhesive 40-100

Filler 35-100

Antioxidant 0,35-1,5

Organic solvent 180-300

Modifier 10-20

The invention is illustrated by examples of specific performance. Recipe hermetical TPR DST-30.

As the adhesive used intercommunale resin, phenol resin, rosin, etc.

The filler used soot, micro-talc, titanium dioxide, etc.

As an antioxidant use Agidol-1, etc.

As surface-active substances are used the product is processing a mixture of mono - and dialkylphenols ethylene oxide.

As modifiers use connections quinoid type, for example o,o-bis-(1,3,5-tri-tert-butyl-4-oxo-cyclohexadiene-2,5-yl)-p-anthinanixon or o,o-bis-(1,3,5-tri-tert-butyl-4-oxocyclohexa-2,5-yl)-2-methyl-5-propyl-p-anthinanixon, or quinoid compounds in combination with metal oxides, for example with Mno2or metal oxides in combination with sulfur and organic sulfides, such as tetramethylthiuramdisuphide, tetraethyleneglycol, 2-mercaptobenzothiazole, di-(2-benzothiazolylthio), or chlorides of metals of variable valence, such as the chlorides of iron, zinc, tin.

For comparison in the table. 1 shows the formulation of the sealant, selected as a prototype, and sealant based copolymer DST-R without modifiers.

Technology of preparation of sealant is serial is nitela, antioxidant, if necessary, an additional adhesive, such as phenol-formaldehyde resins, and surfactants, modifier, the remaining 1/3 part of the solvent and stirring for 60-120 minutes the solvent used butyl acetate, ethyl acetate, R-4, toluene, gasoline nefras and their mixtures in different ratios.

The results of the tests sealant proposed composition and prototype to mechanical stress are given in table. 2.

In table. 3 shows the resistance of the sealant to aggressive environments influence 26% NaCl, 20% NaOH solution, acids - 30% hydrochloric, 23% of chlorine and 10% nitric acid, solvents, hydrocarbon oils, temperatures, adverse weather effects.

As seen from the above table. 2 and 3, the sealant of the proposed composition has a high mechanical characteristics, saves them at elevated temperatures up to 120C, while maintaining reliable protection of the surface.

The proposed sealant retains its performance properties when exposed to solvents such nefras, butyl acetate, acetone, toluene, mineral hydrocarbon oils; resistant to atmosfernomy composition tested in experimental conditions, the FSUE “December”.

1. A sealing composition comprising a butadiene-styrene thermoplastic elastomer, fillers, adhesive, antioxidant, organic solvent, characterized in that it additionally contains modifiers, such as connection quinoid type, for example o,o-bis-(1,3,5-tri-tert-butyl-4-oxo-cyclohexadiene-2,5-yl)-p-anthinanixon or o,o-bis-(1,3,5-tri-tert-butyl-4-oxocyclohexa-2,5-yl)-2-methyl-5-propyl-p-anthinanixon, or quinoid compounds in combination with metal oxides, for example with manganese dioxide, sulfur and/or metal oxides in combination with organic sulfides, such as tetramethylthiuramdisuphide, tetraethyleneglycol, 2-mercaptobenzothiazole, di-(2-benzothiazolylthio), or chlorides of metals of variable valence in the following ratio of components, wt.h.:

Butadiene-styrene thermoplastic elastomer 100

The adhesive 40-100

Filler 35-100

Antioxidant 0,35-1,5

Organic solvent 180-300

Modifier 10-20

2. Sealant under item 1, characterized in that it further comprises a surfactant, for example, the product is processing a mixture of mono - and dialkylphenols ethylene oxide in amounts

 

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16 cl, 3 tbl, 19 ex

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