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INVENTION
Russian Federation Patent RU2291175
COMPOSITION FOR waterproofing, anti-corrosion
And sealer
Name of the inventor: Nistratov Andrian Viktorovich (RU); Vaniev Marat Abdurahmanovich (RU); Ivan Novakov (RU); Lukyanichev Vadim V. (RU); Lukasik Vladislav Antonovich
The name of the patentee: State Educational Institution of Higher Professional Education Volgograd State Technical University (Volgograd State Technical University)
Address for correspondence: 400131, Volgograd, Lenina 28, Volgograd State Technical University, Department of Intellectual Property.
Starting date of the patent: 2005.12.15
The invention relates to polymeric materials and construction can be used for the manufacture of waterproofing, sealing and corrosion compositions to be processed by casting and spraying. The composition comprises, in parts by weight .: 100 polysulfide oligomer, unsaturated polyester resin, PN-1 90-100, aerosil 5-20, 3-20 organic peroxide, 10% solution of cobalt naphthenate in styrene 2.4, 2.4, 6-tris (dimethylaminomethyl) phenol 0.5-1. The technical result - the composition provides a coating with high strength properties, adhesion to substrates, waterproofing properties, resistance to the action of acids and alkalis, application adaptability.
DESCRIPTION OF THE INVENTION
The invention relates to polymeric materials and construction can be used for the manufacture of sealing, and corrosion gidroizoliruschih compositions processed by casting and spraying.
Known sealant composition comprising polysulfide oligomer, titanium dioxide, hydrophobized chalk, aerosil, polietilenglikoladipinat, manganese dioxide, stearic acid, diphenyl guanidine and a plasticizer.
The disadvantage of this composition is insufficient in tensile strength and elongation, high water absorption, and a curing step need mode (step 2). [RF patent №2064955, cl. 6 C 09 K 3/10, publ. 1996].
Known sealant composition comprising polysulfide oligomer, filler, manganese dioxide, Aerosil, diphenylguanidine, diane epoxy resin and curing retardant plasticizer [A. USSR №1054397, cl. With 09 K 3/10, publ. 1983].
The disadvantages of the compositions are low: The hydrolytic stability, mechanical properties and thixotropy.
The closest to the proposed technical essence and achieved result is a sealant composition comprising a polysulfide oligomer, filler, manganese dioxide, a plasticizer, stearic acid, aerosil, diphenylguanidine and unsaturated polyester resin, in the following ratio, mass parts .:
| polysulfide oligomer | 100 |
| Filler | 83,43-142 |
| manganese dioxide | 6,2-10 |
| softener | 7,19-15 |
| stearic acid | 0,13-0,7 |
| aerosil | 0,55-4,34 |
| diphenylguanidine | 0.2-1.5 |
| Unsaturated polyester resin | 0.5-5 |
[RF patent №2153517, cl. 7 C 09 K 3/10, publ. 27.07.2000].
The disadvantage of this composition is the low tensile strength, low gidrostabilnost and resistance to acids and alkalis. Use of a prototype composed of titanium dioxide, kaolin and chalk significantly reduces the waterproofing properties of the composition. The inherent vulcanizates thiokols hydrophilic polymer matrix leads to high water absorption. Use to cure the composition of manganese dioxide limits the reception of materials in many colors. Keeping the filler in the polysulfide oligomer being prepared sealant paste, without the use of a plasticizer, poor dispersion of components defines. High viscosity formulations significantly impairs the workability of coating formation.
The object of the present invention is to provide a composition having enhanced: tensile strength, adhesion to substrates, waterproofing properties, resistance to acids and alkalis, application adaptability.
The technical result is to increase the tensile strength, adhesion to substrates, waterproofing properties, resistance to acids and alkalis, technology application, and applications and the expansion of the claimed composition.
Technical result is achieved by using a composition comprising polysulfide oligomer, unsaturated polyester resin, aerosil, hardener and accelerator, and, as an unsaturated polyester resin it contains an unsaturated polyester resin, PN-1 as hardener - organic peroxide as an accelerator - 10% cobalt naphthenate solution in styrene and an additional structuring agent - 2,4,6-tris (dimethylaminomethyl) phenol in the following ratio, mass parts .:
| polysulfide oligomer | 100 |
| Unsaturated polyester resin PN-1 | 90-100 |
| aerosil | 5-20 |
| organic peroxide | 3-20 |
| A 10% solution of cobalt naphthenate in styrene | 2-4 |
| 2,4,6-tris (dimethylaminomethyl) phenol | 0,5-1 |
The invention consists in the use in the composition of an unsaturated polyester resin PN-1, chemically interacting with the polysulfide oligomer that enhances agressivostoykost and substantially improved adhesion to substrates. In the mixing step, and polysulfide oligomer, filler, an unsaturated polyester resin PN-1 serves as a "temporary" plasticizer. This allows to improve the processability of the composition, to reduce defects of the cured materials. Modification polysulfide oligomer of an unsaturated polyester resin, PN-1 is carried out directly on curing step. The hardener and the accelerator are selected so as to ensure complete interaction between the functional groups of the polysulfide oligomer and the unsaturated polyester resin PN-1. The initiator organic peroxide activity allows to create materials with high density cross-linked chains. The use of cobalt naphthenate solution polymerization-capable compounds - styrene conversion provides the highest functional groups constituting the composition. Additional introduction of structuring agent in the form of a substituted phenol with amine groups, the crosslinking density increases and improves agressivostoykost material coating. High dispersion of the blend components is achieved by use of liquid ingredients.
When carrying out the claimed invention, the coating on prolonged contact with water solutions of acids and alkalis under normal conditions has lower levels of swelling, high physical-mechanical properties, high reliability and waterproofing adhesion to the substrate.
As seen from Tables 1 and 2, when the content of the unsaturated polyester resin PN-1 less than 90 parts by weight deteriorating the strength properties, adhesion to substrates and coating agressivostoykost. Using more than 100 pbw unsaturated polyester resin PN-1 leads to an increase of swelling material in alkaline solutions.
When using aerosil in amount less than 5 parts by weight the composition has a low viscosity and insufficient thixotropic properties. The increase of more than 20 parts by weight of Aerosil degrades the strength properties and agressivostoykost coating. Furthermore, the coating is characterized by an unsatisfactory resistance to alkali solution.
When the content of the organic peroxide is less than 3 parts by weight, due to the low degree of cure, the strength properties of the coating are reduced. Increasing the amount of organic peroxide is more than 20 parts by weight reduces the viability and agressivostoykost coating composition.
When using a 10% solution of cobalt naphthenate in styrene in an amount less than 2 parts by weight deteriorating the strength properties of the cured materials. The increase of 10% solution of cobalt naphthenate in styrene of more than 4 parts by weight It reduces the viability and interfacial separation in the formulation.
Use of 2,4,6-tris (dimethylaminomethyl) phenol in amounts of less than 0.5 deteriorates agressivostoykost coating. Using more than 1 part by weight amount of 2,4,6-tris (dimethylaminomethyl) phenol, does not lead to significant improvement agressivostoykosti coating.
The liquid thiokols containing SH-groups of 2,6-4,0% (TU 38.50309-93) used as a polysulfide oligomer. Unsaturated polyester resin - PN-1 (GOST 27952) is a solution of styrene (styrene content of 26-29%) polycondensation product of diethylene glycol, maleic and phthalic anhydrides. Hardener - organic peroxide, as that can be used - isopropylbenzene hydroperoxide (TU 38-10293-82), tert-butyl hydroperoxide (TU 6-05-10-54-86), methyl ethyl ketone peroxide (6-05-2019-86 ), cyclohexanone peroxide (TU 2417-031-05015213-95). Accelerator - 10% cobalt naphthenate solution (TU 6-09-1024-76) in styrene (GOST 10003.90). Filler - Aerosil (GOST 14922-77). The structuring agent - 2,4,6-tris (dimethylaminomethyl) phenol (Alkofen MA) (TU 6-00209817.035-96).
To manufacture the composition using mixing equipment so as to obtain a homogeneous slurry mixture. The mixture is applied evenly to the surface to be protected and maintained until complete curing at 15-25 ° C for 7-10 days.
Tests performed on the cured samples to known methods. Tensile strength at break were determined in accordance with GOST 270-75 and GOST 25246-82. Swelling in hostile environments was determined in accordance with GOST 2678-80. Bonding strength with metal and concrete in accordance with GOST 209-82 and GOST 265789-85, survival time in accordance with GOST 12812-80. The rheological properties of the compositions were determined in a rotary viscometer "RP m-1" at a shear rate of 1 s -1 using a "cylinder-cylinder" measuring cell at (23 ± 2 ° C).
The composition and properties of the composition for waterproofing, sealing and anti-corrosion coating are shown in Tables 1 and 2.
Example 1 In a mixer was charged with 100 g of a polysulfide oligomer, 90 g of an unsaturated polyester resin PN-1 and 5 g of Aerosil and conduct dispersion for 20 min. The mass obtained is added 18 g of an organic peroxide and mixing is carried out for 5 minutes. Then the reaction mixture was added 2 g of a 10% solution of cobalt naphthenate in styrene, and 0.5 g of 2,4,6-tris (dimethylaminomethyl) phenol and mixing is carried out for 5 minutes. Application of the resulting composition is carried out by airless spraying or pouring method.
In a similar manner as in Example 1 compositions prepared according to Examples 2-8, the composition of which is listed in Table 1 and the properties - in Table 2. A method of forming a coating is selected depending on the viscosity of the resulting compositions.
An example of the prototype. The porcelain mortar placed, parts by weight .:
polysulfide oligomer - 100, chemically precipitated chalk - 40 Kaolin - 60 Aerosil - 0.55, an unsaturated polyester - 1. The mixture is then stirred thoroughly, yielding a sealing paste. By mixing the following ingredients are prepared hardening paste .: mass parts manganese dioxide - 7.5, dibutyl phthalate - 7.5 polietilenglikoladipinat - 0.5 Stearic Acid - 0.5, diphenylguanidine - 1.0. Curing the paste obtained is introduced in the sealing paste and mixed thoroughly. To fully cure the composition to stand for 7 days at a temperature of 20 ° C or for 24 hours at 70 ° C.
Thus, the inventive composition provides a coating with high tensile strength, adhesion to substrates, waterproofing properties, resistance to the action of acid and alkali solutions, coating processability. The composition may be used to create sealants, waterproofing and anti-corrosion coatings. Sufficient thixotropic properties of the coating composition and allow the use of a composition for sealing and vertical contiguity of concrete and metal substrates.
| Table 1 | |||||||||
| composition components | The content of components in the composition, phr of Examples | Prototype | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| polysulfide oligomer | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Chemically precipitated chalk | - | - | - | - | - | - | - | - | 40 |
| Kaolin | - | - | - | - | - | - | - | - | 60 |
| aerosil | 5 | 10 | 10 | 20 | thirty | 2 | 10 | 5 | 0.55 |
| manganese dioxide | - | - | - | - | - | - | - | - | 7.5 |
| Dibutilftalat | - | - | - | - | - | - | - | - | 7.5 |
| Polietilenglikoladipinat | - | - | - | - | - | - | - | - | 0.5 |
| stearic acid | - | - | - | - | - | - | - | - | 0.5 |
| diphenylguanidine | - | - | - | - | - | - | - | - | 1 |
| Unsaturated polyester resin prototype | - | - | - | - | - | - | - | - | 1 |
| Unsaturated polyester resin PN-1 | 90 | 90 | 95 | 100 | 80 | 120 | 90 | 100 | - |
| organic peroxide | 5 | 10 | 15 | 20 | 2 | 24 | 15 | 10 | - |
| A 10% solution of cobalt naphthenate in styrene | 2 | 2 | 3 | 4 | 1 | 4 | 6 | 4 | - |
| 2,4,6-tris (dimethylaminomethyl) phenol | 0.5 | 1 | 0.75 | 1 | 0.5 | 1.25 | 1 | 0.25 | - |
| Note: as part of 1,5-polysulfide oligomer containing SH-groups of 2.6%, in the composition of 2,7,8,9-polysulfide oligomer containing SH-groups of 3.0%, in the composition 3,4,6- polysulfide oligomer containing SH-groups of 4.0%; composed of 1.5 - use tert-butyl hydroperoxide, comprising 2,7 - methyl ethyl ketone peroxide, comprising 3.8 - cyclohexanone peroxide, comprising 4.6 - isopropylbenzene hydroperoxide | |||||||||
| table 2 | |||||||||
| Index | Example | Prototype | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| The viscosity (23 ± 2 ° C) Pa.s | 25 | 37 | 20 | 65 | 97 | 10 | 15 | 12 | 185 |
| Viability, min | 80 | 70 | 55 | 50 | 95 | 40 | 65 | 50 | 65 |
| Tensile strength, MPa | 15.8 | 15.1 | 15.4 | 14.7 | 2.6 | 16.0 | 12.4 | 14.3 | 1.75 |
| Bond strength to steel Article 3 MPa | 5.04 | 5.15 | 6.03 | 6.17 | 1.12 | 5.19 | 5.20 | 4.85 | 1.01 |
| Adhesion strength with concrete, MPa | 4.67 | 4.81 | 5.80 | 5.94 | 1.84 | 4.73 | 4.89 | 4.12 | 0.65 |
| Water absorption after 60 days,% | 2.2 | 2.1 | 1.1 | 1.2 | 5.8 | 2.1 | 3.4 | 4.9 | 14.1 |
| The change in mass of 10% H 2 SO 4, after 60 days,% | 1.32 | 1.1 | 0.9 | 1.0 | 3.2 | 2.1 | 2.9 | 2.3 | 3.2 |
| The change in mass of 10% NaOH, after 60 days,% | -0.7 | -0.6 | -0.5 | -0.7 | -1.4 | -1.6 | -1.4 | -1.5 | -1.15 |
CLAIM
A composition for waterproofing, anti-corrosion and sealing coating comprising polysulfide oligomer, unsaturated polyester resin, aerosil, hardener and accelerator, characterized in that the unsaturated polyester resin it contains an unsaturated polyester resin, PN-1 as hardener - organic peroxide as accelerator - 10% cobalt naphthenate solution in styrene and an additional structuring agent 2,4,6-tris (dimethylaminomethyl) phenol in the following ratio, mass parts .:
| polysulfide oligomer | 100 |
| Unsaturated polyester resin PN-1 | 90-100 |
| aerosil | 5-20 |
| organic peroxide | 3-20 |
| A 10% solution of cobalt naphthenate in styrene | 2-4 |
| 2,4,6-tris (dimethylaminomethyl) phenol | 0,5-1 |
print version
Publication date 17.01.2007gg
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