Poyurethane solvent-free reactive bicomponent system for preparing covers showing thermal stability at temperatures until 90°c, elasticity and compatible with cathode protection

FIELD: chemistry of polymers.

SUBSTANCE: invention proposes polyurethane solvent-free reactive bicomponent system used in preparing covers showing thermal stability at temperature until 90oC, elasticity and compatible with cathode protection. The system consists of, for example, chlorinated paraffin hydrocarbon or polychlorodibutoxybenzene as chlorinated soft resin and containing OH-groups of component, in particular, containing simple ether groups with functionality ≥3.5 and molecular mass 280-1000 Da, or their mixtures consisting of such components and polyisocyanate component.

EFFECT: valuable technical properties of system.

14 cl, 7 tbl

 

The present invention relates to polyurethane systems for coatings, in particular two-component polyurethane reactive systems that do not contain solvent, to obtain coatings, flexible and compatible with cathodic protection.

For protection against corrosion of trunk oil and gas pipelines, as well as ballast tanks of ships required coatings that have high hydrophobicity, toughness and elasticity, as well as compatibility with cathodic protection. Modern level of technology present in this area FBE (Fusion Bonded Epoxid" = molten mass containing epoxide), which are applied (if necessary in two layers) as primers. When this powder for the reaction is applied to the hot pipe. Method of sintering FBE coatings are coated with a layer of polyethylene/polypropylene (PE/PP), or is the design with glue, polyurethane foam and polyethylene.

Further, modern technology are polyurethane systems that are applied in the form of wet varnish on the cold pipe or joint. Pipes with pre-made coating before establishing the network pipeline bend in place.

The disadvantage of this prior art is that FBE coatings are fragile and do not have the strength to image the of chips and bump, and elasticity.

Bending stresses appearing during laying of the pipeline, lead to cracking of the coating and thus to the loss of cathodic protection. For on-site repair, as well as to obtain coatings in the areas of joints FBE system can be applied only with very large financial costs (higher power consumption) and low output. Containing epoxides wet system cannot be applied at the place at temperatures below 0°C. the Lack of clean two-component polyurethane systems is a small hydrophobicity and low compatibility with cathodic protection. In addition, the hydrophilic properties of two-component polyurethane systems require protection from corrosion of pipes and ballast tanks of ships the thickness of >1000 μm.

Underlying the invention, the task is to make available to protect pipes from corrosion solvent liquid primer that

(a) exhibit thermal stability up to temperatures of 30°With simultaneous compatibility with cathodic protection

b) have a relative elongation at break of at least >5% and are shock-viscous,

C) due to the increased hydrophobicity even more thin layers, 600-900 μm, provide long-term protection,

g) can be applied both to the places which, and in the factory and also be cured at temperatures below zero,

d) apply to both the pipe and the area of the joints of pipes and

e) have a long viability (up to 15 minutes), and long time for processing putty (about 50 minutes).

The subject of the invention is therefore not solvent-free reactive two-component polyurethane system of

(A) solvent-polymer mixture consisting of

I) 5-50 wt.% do not contain Oh-groups component, consisting of

a) 100-0% chlorinated hydrocarbon or polychlorodibenzo as chlorinated soft resin,

b) 100-0% di-(phenoxyethyl)formula or

in) 100-0% polyacrylonitrile, or

g) a mixture of a) and b), and the ratio of a):b) is from 99:1 to 1:99 wt.%, or

d) a mixture of b) and C), with respect to b):b) is from 99:1 to 1:99 wt.% and

II) 95-50 wt.% containing Oh-groups component, consisting of

a) 40-100 wt.% component having a hydroxyl group and containing ether groups, with functionality ≥, a 3.5 and a molecular weight 280-1000 or mixtures of several such components, as well as

b) 0-60 wt.% simple proliferatoractivated containing hydroxyl group, and

C) 0-60 wt.% other compounds with hydroxyl groups in

the molecule, and the Ummah wt.% IIa)-IIB) is always 100%, and

C) polyisocyanate component comprising at least one organic MDI, and the equivalent ratio of NCO:HE is from 0.8:1 to 1.5:1, for the manufacture of thermally stable coatings, resistant to temperatures up to 90°and compatible with cathodic protection.

In the case of not containing the Oh group of the component (Ia) refers to chlorinated paraffin hydrocarbons, which are sold under the trade names Hordaflex®types LC and SP (firm Hoechst), Cerechlor® type 70/42 (firm IC-AI), Rishichlor® (firms Rishiroop).

In the case of component IB) refers to di(phenoxyethyl)formula, which are available on the market under the trade name Desavin® (Bayer).

In the case of component IB) refers to the polyacrylonitrile with an average molecular weight 600-3000.

In the case of the component IIa)containing hydroxyl groups, it is simple polyaminopropyl that, for example, you can get well-known methods of attaching a cyclic ethers, such as ethylene oxide, propylene oxide, styrene oxide, butylene oxide or tetrahydrofuran to the original compounds, such as polyhydric not containing ether groups, alcohols, aminoalcohols or amines with a molecular weight 280-1000, preferably with a molecular weight of 350-700 and particularly preferably 400-500. The functionality of the molecules of the source is x compounds related to the interaction with cyclic ethers there should be ≥ 3,5, better ≥4. Particularly preferred polyethers, which are built from repeating units of the structure-CH(CH3)CH2O - not less than 50%, better at least 90% (based on the sum of all repeating units.

As a suitable source compounds, polyhydric alcohols include glycerol, trimethylolpropane, butanetriol-1,2,4, hexanetriol-1,2,6, bis(trimethylolpropane), pentaerythritol, mannitol, methylglucose and/or mixtures thereof.

Suitable aminoalcohols are, for example, 2-aminoethanol, diethanolamine, 3-amino-1-propanol, 1-amino-2-propanol, diisopropanolamine, 2-amino-2-hydroxymethyl-1,3-propandiol and/or mixtures thereof.

Suitable polyvalent amines are, in particular, aliphatic or cycloaliphatic amines, such as, for example, Ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminobutane, 1,3-diamino-2,2-DIMETHYLPROPANE, 4,4-diaminodicyclohexylmethane, ISOPHORONEDIAMINE, hexamethylenediamine were, 1,12-dodecandioic or aromatic amines, such as, for example, isomers of toluenediamine and/or mixtures thereof.

Receive available if necessary polyhydroxyalkanoate IIB) binder mixture according to the invention can be carried out, for example, in EP-A 825210.

In the case of an alcohol component IIB) we are talking about one or more hydroxidealuminum with molecular vesom-1000. Preferably used are low-molecular hydroxycodone molecular weight 32-350, such as, for example, methanol, ethanol, propanol, butanol, hexanol, 2-ethylhexanol, cyclohexanol, stearyl alcohol, ethylene glycol, diethylene glycol, triethylene glycol, propandiol-1,2 and -1,3, dipropyleneglycol, tripropyleneglycol, butanediol-1,2, -1,3, and -1,4 -2,3, pentanediol-1,5, 3-methylpentanediol-1,5, hexanediol-1,6, 2-ethylhexanediol-1,3, 2-methylpropanol-1,3, 2,2-DIMETHYLPROPANE-1,3, 2-butyl-2-ethylpropane-1,3, 2,2,4-trimethylpentanediol-1,3, octanediol-1,8, macromolecular α-arcangioli with 9-18 carbon atoms, cyclohexanedimethanol, cyclohexanediol, glycerin, trimethylolpropane, butanetriol-1,2,4, hexanetriol-1,2,6, bis(trimethylolpropane), pentaerythritol, mannitol or methylglucose.

If necessary as a component IIB) can be known from polyurethane chemistry complex hydroxymaleimide, complex hydroxymaleimide, simple hydroxymaleimide with functionality <3,5, simple politieverhoor, hydroxypolycarboxylic or hydroxyvalerate to molecular weight 1000.

If necessary, the polymer mixture (A) can be added to the known technology varnishes stabilizers, such as antioxidants and/or light stabilizers, in order to further improve the simple proliferatoractivated with motability and resistance to the effects of weather; preferably a mixture of a binder according to the invention to use without stabilizers.

Suitable antioxidants are, for example, sterically difficult phenols, such as 4-methyl-2,6-decret.-the butylphenol (BHT) or other proposed by the company aIso the Geigy under the name of this class of products Irganox®substituted phenols, thioethers (for example Irganox PS®, AIso the Geigy) or phosphites (for example, Irgaphos®, AIso The Geigy). Suitable light stabilizers are, for example, HALS-amines (Sitosterolemia employed amines (Hindered Amine Light Stabilizers), as, for example, Tinuvin®622 D or Tinuvin®765 (aIso the Geigy), and substituted benzotriazole, such as Tinuvin®234, Tinuvin®Tinuvin 327 or®571 (AIso The Geigy).

Polyhydroxyamide II) consists of 40-100 wt.% from IIa), 0-60 wt.% from IIB) and 0-60 wt.% from IIB). The amount IIa) + IIB) + IIB) without accounting to be used, if necessary, an antioxidant or sitosterolemia equal 100 wt.%.

In the case of the polyisocyanate component B) in accordance with the present invention we are talking about organic polyisocyanates with an average NCO-functionality of at least 2 and a molecular weight of at least 140. Good, first of all, (i) is not modified organic polyisocyanates with a molecular weight lying in the range 140-300, (ii) lacquer of poliisi the Anat molecular weight of 300-1000, and (iii) having a urethane group NCO-prepolymers with molecular weight more than 1000 or a mixture of (i)-(iii).

Examples of polyisocyanates group (i) are 1,4-diisocyanatobutane, 1,6-diisocyanatohexane (HDI), 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4 - or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1-isocyanato-3,3,5-trimethyl-5-scentometer-cyclohexane (IPDI), 1-isocyanato-1-methyl-4-(3)-isocyanatomethyl-cyclohexane, bis-(4-isocyanatophenyl)methane, 1,10-diisocyanatobutane, 1,12-diisocyanatobutane, cyclohexane-1,3 - and -1,4-diisocyanate, isomers xylylenediisocyanate, 2,4-diisocyanate or mixtures thereof with 2,6-diisocyanatomethyl with the content of 2,6-diisocyanatomethyl mainly in the calculation of the mixture to 35 wt.%, 2,21-, 2,41-, 4,41-diisocyanatobutane or technical mixtures of polyisocyanates diphenylmethane series or any mixtures of the aforementioned isocyanates.

Preferably used are the polyisocyanates diphenylmethane series, particularly preferably as a mixture of isomers.

The MDI group (ii) are known in themselves, do not contain solvent lacquer polyisocyanates. The term "lacquer polyisocyanates" should be understood in the framework of the invention compounds or mixtures of compounds which are obtained by the known reaction of oligomerization simple diisocyanates of the type, for example, called the ar (i).

Suitable oligomerization reactions are, for example, the reaction of alienatingly, buritizal, carbodiimides, cyclization, dimerization, formation of urea, the trimerization and/or oreanization. Often when "oligomerization" leaky several of these reactions simultaneously or sequentially one after another.

In the case of "lacquer polyisocyanates", preferably it is about the polyisocyanates with the structure of uretdione, isocyanurate, allophanate, biureta, iminoimidazolidine and/or oxidization.

Getting this kind of lacquer polyisocyanates is known and described, for example, in DE-A 1595273, DE-A 3700209, DE-A 3900053 or in EP-A-0330966, EP-A 0259233, EP-A 0377177, EP-A 0496208, EP-A 0524501 or US-A 4385171.

In the case described above lacquer polyisocyanates with urethane groups we are talking about prepolymers having isocyanate groups, which can be obtained by the interaction of low and high molecular polyhydroxylated compounds with excess amounts of the above-mentioned di - or polyisocyanates or with a large excess of the mentioned di - and polyisocyanates and the subsequent removal of excess MDI, for example by the method of thin-film distillation. Getting prepolymers takes place in General at temperatures 40-140°With, if necessary with simultaneous use of suitable catalysts.

To obtain such prepolymers suitable low molecular weight polyhydroxylated compounds with molecular weights of 62 to 299, such as, for example, ethylene glycol, propylene glycol-1,3, and butanediol-1,4, hexanediol-1,6, neopentylglycol, 2-ethyl-hexanediol-1,3, glycerol, trimethylolpropane, pentaerythritol containing hydroxyl groups, low molecular weight esters of such polyols with dicarboxylic acids of the following named type or a low molecular weight products amoxilonline or propoxycarbonyl this kind of simple polyols or any mixtures of such modified or unmodified alcohols.

The MDI group (iii) are known in themselves prepolymers having isocyanate groups on the basis of simple diisocyanates (i) of the above mentioned type and/or based lacquer polyisocyanates (ii), on the one hand, and organic polyhydroxylated compounds with molecular weight greater than 300, on the other hand.

The MDI group (iii) are predominantly high molecular weight prepolymers polyhydroxylated compounds with molecular weights in the range from 300 to 20,000, better from 1000 to 8000, known from polyurethane chemistry.

High-molecular polyhydroxylated compounds to obtain prepolymers are, for example, made appropriate instructions difficult EPE is s polyols based on simple low-molecular alcohols mentioned type and polybasic carboxylic acids, such as, for example, adipic, sabotinova, phthalic, isophthalic, tetrahydrophtalic, hexahydrophthalic, maleic acid, anhydrides of these acids, or any mixtures of such acids or anhydrides.

Also suitable for the production of prepolymers or polypropolene are the corresponding instructions polylactones having in the molecule a hydroxyl group.

To obtain prepolymers having isocyanate groups are also suitable, appropriate above the ordinary preferability, which are obtained by known methods of alkoxysilane appropriate starting compounds. Suitable parent compounds are, for example, as mentioned above, simple polyols, water, organic polyamine at least two N-H bonds or any mixture of such starting compounds. Suitable for reaction alkoxysilane acceleratedly, in particular ethylene oxide and/or propylene oxide, which can be used in any sequence or in mixture with the reaction alkoxysilane.

Also suitable for receiving the corresponding prepolymers made above polyethers of polytetramethylene, such as available known methods by cathodic polymerization of tetrahydrofuran.

In addition, to obtain prepolymer the suitable polycarbonates, having a hydroxyl group and match the above statements, which can be obtained, for example, by the interaction of simple diodes above-mentioned type with dellcorporate, such as, for example, diphenylcarbonate, or phosgene.

Next, suitable for the production of prepolymers having NCO-groups are politieverhoor, which can be obtained, for example, by polycondensation of thiodiglycol with itself or with dialami, and/or polyols named type.

In addition, suitable Polyacetals, such as, for example, polycondensation products of formaldehyde and diols or polyols of the above mentioned type, which can be obtained using acidic catalysts, such as phosphoric acid or p-toluensulfonate.

Needless to say, can be used to obtain prepolymers well as mixtures mentioned as examples of hydroxyl compounds.

To obtain a binder according to this invention, components a) and b) are mixed in such proportions that the equivalent ratio of NCO:OH of from 0.8:1 to 1.5:1, better from 0.9:1 to 1.3:1.

If necessary, mixed with the usual auxiliary and additional substances from the coating. These include, for example, contribute to spreading, control Studio strobe, flash is either the viscosity of the additive, pigments, fillers, matting tools, UV stabilizers and antioxidants, as well as catalysts for the reaction of "matching". These compounds are typically added to the component (A) before mixing components a) and b) and are mixed with it.

Due to the use according to the invention is thermostable reactive two-component polyurethane system containing no solvent, and, if necessary, auxiliary and additive substances named type can protect any metal substrates even under the condition of cathodic protection and long-term thermal loads temperatures up to 30°C.

In the case of metal substrates, preferably it is about, for example, sheet pile walls, gateways, ships, pipes and other metal objects that are used on marine vessels, marine equipment and ground equipment.

Examples (General instructions)

Rubbing substances forming the floor, always occur in mixtures containing Oh-groups, using a vacuum mixer. Using a two-part installation airless spray solvent-the substance forming the coating is applied with a layer thickness of 500-1200 µm subjected to blasting steel SA 21/2the sheet thickness of 3 mm After curing under laboratory conditions, during the week, p the closure test for compatibility with cathodic protection, as well as the elasticity and impact strength.

In the case of substances for coating established the viability and the processing time of filling (repair, field joints).

Check cathodic protection according ASTMG8

Wednesday: 5%NaCl solution

- temperature: 30°

- voltage: UH=-1260 mV

duration: 28 days

Evaluation criteria: the destruction of the film on the surface

the constancy of consumption

corrosion under layer after performing scratches to 10 mm

Impact strength: ASTM D 2794-93

Hardness shore a DIN 53505

Elongation at break

free film: DIN EN ISO 527

Viability: (minutes or seconds)

Processing putty (minutes)

ASTM=American Society for Testing Materials=American society for testing materials

Example 1-5 Null values

(Bayer)
Table 1
Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)Approx. 5

(part)
Component 1Ȁ
Desmophen®LS 2358(Bayer)22,7was 12.7573,84to 45.422,7
Desmophen®VP LS 2285(Bayer)-was 12.75-to 45.4-
1,4-Butanediol(Bayer)--14.4V6,92-
Baylith® L-pasta(Powder)of 5.4of 5.421,621,6of 5.4
Anti-Terra 204®(Byk Chemie)0,40,41,61,60,0
Hardener DT(Bayer AG)0,40,41,61,60,4
Crayvallac®Super(Langer and Co)0,40,41,61,60,4
Talc BC-Standard®(Nain Mineralische)--22,422,4-
Naitsch ®SU Standard(Nain Mineralische)5,65,6--5,6
Plastorit®Naintsch 0(Nain Mineralische)7,77,730,830,87,7
Heavy spar EWO®(Sachtleben)18,918,975,675,618,9
Bayertitan®R-KB-4(Bayer)3,73,7--3,7
Tronox®R-KB-4(Kerr McGee)--14,814,8-
Component 2
Desmodur®VL(Bayer)32,0527,5128,2128,231,5
Desmodur®E 14----5,0
CD test(30°C)
Layer thickness (μm)10508407307801120
Duration (days)DDDDD
Score
Consumption current (start)[mA]12,614,5253212
Flow rate after 20 days[mA]22,51718,533,523
Consumption current (end)[mA]22191537,523
The appearance of the film (breaking the surface)nonononono
Corrosion under layer after performing scratches from artificial (mm) damage [ASTM G 42-85]0-10-1002

Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)Approx. 5 (parts)
Impact strength [j/mm]7,57,88,28.28,5
The shore hardness8280808177
Elongation at break [%]2,02,02,32,317
Viability [sec]120120 9090130
Spackling ability (min)00000

Examples according to the invention)

The following examples according to the invention (tables I-VII) are based on the formulations of zero values in table I. PVK, and the ratio NCO/OH remain constant. Desmophene LS 2358 and/or LS 2285, and/or butanediol-1,4 are replaced in proportion to the equity interest in soft resins according to the invention or combinations thereof.

Table III

Examples 1-4 (according to the invention) according to the zero value of the example 2 of table I
Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)
Component 1
Desmophen®LS 2358(Bayer)7.659.568,657.65
Desmophen®VP LS 2285 (Bayer)the 7.659,568,65the 7.65
Hordaflex SP®(Hoechst)11,1-4,111,1
Desavin®(Bayer)-5,384,1-
Desmodur®VL(Bayer)16,5020,618,716,50
Desmodur®E 14(Bayer)----
CD-Test (30° (C) ASTMG 42-85
Layer thickness (μm)880820890650
Duration (days)28282828
Consumption current (Nacha is about) [mA]15191319
Consumption current (end)[mA]22271424
The appearance of the film (breaking the surface)NoNoNoNoNo
Corrosion under layer after performing scratches from artificial damage11-212-3
Impact strength[J/mm]11141515
The shore hardness69706968
Elongation at break (%)14171514
Viability (min)15141313
Putty resin (min)45454545

Table IV

Examples 1-4 (according to the invention) according to the zero value of the example 3 that the persons I
Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)
Component 1
Desmophen®LS 2358(Bayer)44,3055,3844,3050,2
1.4 Butandiol(Bayer)8,6410,808,649,8
Hordaflex SP®(Hoechst)35,30---
Desavin®(Bayer)-representing 22.06-14,12
Polyacrylonitrile(Bayer)--35,3014,12
Component 2
Desmodur®VL(Bayer)76,9296,1576,9287,2
CD-Test (30° (C) ASTMG 42-85
Layer thickness (μm)880790770820
Duration (days)28282828
Consumption current (start)[mA]23212525
Consumption current (end)[mA]28283130
The appearance of the film (breaking the surface)NoNoNoNoNo
Corrosion under layer after performing the CA is apini the artificial damage 0-1110-1
Impact strength[J/mm]11161414
The shore hardness72707171
Elongation at break [%]12141315
Viable(min)15151412
Spackling capacity(min)45454545

Table V

Examples 1-4 (according to the invention) according to the zero value of the example 4 of table I
Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)
Component 1
Desmophen®LS 2358 (Bayer)27,2534,0530,927,25
Desmophen®LS 2285(Bayer)27,2534,0530,927,25
1.4 Butandiol(Bayer)4,155,19the 4.74,15
Hordaflex SP®(Hoechst)39,1-the 15.6-
Desavin®(Bayer)---39,1
Polyacrylonitrile(Bayer)
Component 2
Desmodur®VL(Bayer)76,996,1587,276,9
CD-Test (30° (C) ASTMG 4-85
Layer thickness (μm)830800700810
Duration (days)28282828
Consumption current (start)[mA]14,5162122
Consumption current (end)[mA]19152025
The appearance of the film (breaking the surface)NoNoNoNo
Corrosion under layer after performing scratches from artificial damage [mm]0-11-222
The shore hardness71707072
Elongation at break [%]14181315
Approx. 1 (part)Approx. 2 (parts)Approx. 3 (parts)Approx. 4 (parts)
Viability [min]15151412
Spackling ability (min)45454545

td align="left">  
Table VII

Examples 1-5 (according to the invention) according to the zero value of the example 2 of table I
Approx. 1 (part)Approx. 2 (parts)Approx. 3(parts)Approx. 4(parts)Approx. 5 (parts)
Component 1
Desmophen®LS 2358(Bayer)the 7.65the 7.65the 7.65the 7.65the 7.65
Desmophen LS 2285(Bayer)the 7.65the 7.65the 7.65the 7.65the 7.65
Cerachlor 70/42®(Akzo-ICL)11,1--11,1-
Rishichlor®(Rishiroop)-11,1---
Polychlorodibenzodioxins(Rishiroop)--11,1-11,1
Component 2
Desmodur®VL(Bayer)16,516,516,5
Desmodur®N 3600(Bayer)22,622,6
CD-Test (30° (C) ASTMG 42-85
Layer thickness (μm)780730740800710
Duration (days)2828282828
Consumption current (start)[mA]2420352124
Consumption current (end)[mA]3123273038
The appearance of the film (breaking the surface)NoNoNoNeznacit.Nathnac.
Corrosion under layer after performing scratches from artificial damage
[mm]0 00-12-32-3
Impact strength[J/mm]1111121516
The shore hardness6969686464
Elongation at break [%]1413141718
Viability (min)1515141919
Putty resin (min)4545455555

1. Solvent-reactive two-component polyurethane system of

(A) solvent-polymer mixture consisting of

I) 5-50 wt.% do not contain Oh-groups component, consisting of

a) 0-100 wt.% chlorinated paraffin hydrocarbon or polychlorodibenzo as chlorinated soft resin,

b) 0-100 wt.% di-(phenoxyethyl)formula,

C) 0-100 wt.% polyacrylonitrile or

g) a mixture of a) and b), and the ratio of a):b) is from 99:1 to 1:99 wt.%, or

d) mixtures of a) and b), moreover, the ratio of a):b) is from 99:1 to 1:99 wt.%, or

e) a mixture of b) and C), with respect to b):b) is from 99:1 to 1:99 wt.%, and

II) 95-50 wt.% containing Oh-groups component, consisting of

a) 40-100 wt.% component having a hydroxyl group and containing ether groups, with functionality >3.5 and a molecular weight 280-1000 or mixtures of several such components, as well as

b) 0-60 wt.% simple proliferatoractivated containing hydroxyl group, and

C) 0-60 wt.% other compounds with hydroxyl groups in the molecule, and the sum of the wt.% IIa)-IIB) is always 100%, and

C) polyisocyanate component comprising at least one organic MDI, and the equivalent ratio of NCO:HE is from 0.8:1 to 1.5:1 for coatings, thermally stable at temperatures up to 90°With, flexible and compatible with cathodic protection.

2. The system according to claim 1, characterized in that the equivalent ratio of NCO:OH is from 0.9:1 to 1.3:1.

3. The system according to claim 1, characterized in that it contains as chlorinated paraffin hydrocarbons Hordaflex, Cerechlor and Rishiclor.

4. The system according to claim 1, characterized in that it contains as chlorinated soft resin polychlorodibenzo.

5. The system according to claim 1, characterized in that polyacryla ITIL has a molecular weight of 1000-3500.

6. The system according to claim 1, characterized in that it contains di-(phenoxyethyl)formal.

7. The system according to claim 1, characterized in that it contains a mixture of substances according p-6.

8. The system according to claim 1, characterized in that the molecular weight of the component IIa) is 350-700.

9. The system according to claim 1, characterized in that the functionality of the component IIa)≥4.

10. The system according to claim 1, characterized in that the molecular weight of the component IIB) is in the range from 32 to 350.

11. The system according to claim 1, characterized in that it contains as a component In an aromatic organic polyisocyanate.

12. The system according to claim 1, characterized in that component b contains aliphatic organic polyisocyanate.

13. The system according to claim 1 for obtaining coatings on metal substrates, with, if necessary cathodic protection.

14. The system according to claim 1 to obtain coatings having, if necessary, cathodic protection substrates, such as sheet pile walls, sluices, pipes, vehicles and other metal objects that are used on marine vessels, marine equipment and ground equipment.



 

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FIELD: protecting covers.

SUBSTANCE: invention relates to dye-cover. Proposed dye-cover is prepared from composition comprising components taken in the following ratio, wt.-%: binding agent, 20-30; hollow microspheres, 10-30, and organic solvent, the balance. A binding agent is chosen from group comprising organosilicon resin, acrylic (co)polymer, polyurethane. Ceramic or glass hollow microspheres of size 20-150 mc are uses as hollow microspheres. The composition can comprise additionally titanium dioxide in the amount 2-5 wt.-% and antipyrene additive in the amount 5-25 wt.-%. Invention provides refractoriness, atmosphere resistance and exploitation period. The proposed dye-cover possesses heat-insulting, sound-insulating, waterproofing properties simultaneously and designated for protecting different equipment, pipelines, metallic, concrete, ferroconcrete, brick, wood and other building constructions for habitable, common knowledge and industrial buildings and constructions.

EFFECT: improved and valuable technical properties of dye-cover.

2 tbl, 9 ex

FIELD: wear-resistant protective polymer coats applied for protection against corrosion and mechanical wear; oil-and-gas industry; food-processing, pharmaceutical and other industries.

SUBSTANCE: proposed compound contains the following components, mass-%: 14-20 of epoxy diane resin used as binder; 24-28 of aminophenol hardener; 80-86 of resin - oxyline-5 or oxyline-6 used as modifying agent; 5-10 of aerosil used as fine-grained filler; 50-60 of mixture of graphite and molybdenum disulfide used as anticorrosive filler at mass ratio of graphite to molybdenum disulfide equal to 4:1 and solvent for obtaining the working viscosity. Proposed compound makes it possible to obtain tensile strength of 10.5-19.2 Mpa, relative elongation at rupture of 30.8-40.2 and friction coefficient in metal (Ct3) of 0.048-0.074 at 30C and 0.028-0.042 at 70C.

EFFECT: enhanced water and gasoline resistance.

3 cl, 2 tbl, 5 ex

FIELD: oil producing industry; natural gas industry; production of the anticorrosive primer coating.

SUBSTANCE: the invention represents the anticorrosive primer coating intended for the anticorrosive protection of the steel pipelines predominantly of the oil pipelines and the natural gas pipelines at their building and overhaul and may be used for zone insulation of the welded couplings of the pipes together with the thermal shrink couplings and also for reconditioning of the insulation defects. For increasing the adhesion strength to the polyethylene and the steel as well as the primer coating protection stability against the cathodic spalling at the heightened temperature and slowing down of the underfilm corrosion by the primer coating it contains the butadien-styrene rubber, n-tret- butylphenolformaldehyde pitch, the copolymer of ethylene with the vinylacetate of "Evalan" brand, the mixture of the aminemethyl derivatives of nonylphenols and their hydrochlorides in the ratio from 25:1 up to 1:1, pyrocatechol, magnesium oxide, industrial carbon and the petroleum solvent.

EFFECT: the invention ensures, that the anticorrosive primer coating provides the anticorrosive protection for the oil and natural gas steel pipelines at their building and overhaul, for the pipelines welded couplings areas insulation as well as reconditioning of the insulation defects.

2 tbl

FIELD: polymer materials.

SUBSTANCE: invention provides composition for producing polymeric protective coatings on various surfaces, including metal, concrete surfaces, structural members of conduits, metal units and assemblies in different technical areas, said coatings serving as barriers against attacks of various-type corrosive media. Composition contains following components, wt %: epoxide dian resin, 33.5-41.0; dibutyl phthalate and/or aliphatic epoxide resin DEG-1, 2.5-10.0; polyethylene-polyamine hardener, 4.0-6.5; plate filler in the form of andesite basalt scales with scale thickness 0.2 to 7.0 μm, 42.5-50.0, and, if necessary, Aerosil, 0-6.0, and/or organic solvent, 0-17.5.

EFFECT: reduced toxicity of composition, simplified preparation thereof, reduced barrier properties thereof, and extended functional destination.

2 tbl, 5 ex

FIELD: ferrous metallurgy; oil refining industry; building industry; chemical industry; compositions for production of the anticorrosive zinc-containing base coatings.

SUBSTANCE: the invention is pertaining to the compositions for production of the anticorrosive zinc-containing base coatings intended for a sacrificial protection from corrosion of the products, buildings and constructions made out of the ferrous metals exploited in the atmospheric conditions, in the conditions of water-saline mist, in the medium of the oil products vapors and aerosols. The composition for production of the antirust coating includes the fine-dispersive zinc powder, the three-metal desiccant, the toluene, the modified alkyd film-forming substance, in the capacity of which they use the short-alkyd varnish with addition of the tung oil, modified with the phenol-formaldehyde resin in amount of no more than 5.0 % of the mass of the alkyd film-former, with the acid number of no more than 15.0 mgKOH/g of the film-former and the dynamic viscosity after Brunkfild - 2.0-4.5 Pa·s, and the antisediment additive, in the capacity of which use the admixture of zinc oxide, lecithin and the organophilic bentonite of SD-1 brand. The composition has the high sediment stability at storing and at coating, dries faster and ensures production of the antirust coatings with the heightened resistivity to the water and petroleum action.

EFFECT: the invention ensures production of the composition having the high sediment stability at storing and coating, the fast drying and used for application of the antirust coatings with the heightened resistivity to the water and petroleum action.

2 tab

FIELD: chemical industry; mechanical engineering; extractive industry; heat and power industry; other industries; methods of protection and recovery of the of the corroded metallic surfaces.

SUBSTANCE: the invention is pertaining to the method of protection and recovery of the corroded metallic surfaces working in conditions of the abrasive wear, action of the aggressive mediums, for example, at transportation of the fertilizers, in the heat and power industry, chemical industry and the extractive industry at the repairs of the rust through equipment. The method provides, that at first they apply on the metallic surface of the priming coating based on the composition containing the following components (in mass. %): 20.0-30.0 - the epoxy dian resin with the epoxy reacting weight of 450-500, the curing agent, 12.0-25.0 - pigments, 12.0-25.0 - fillers, 20.0-30.0 - polyamide curing agent Versamid 115, the rest - organic solvents, with the subsequent drying "up to detachment". After that they apply the second insulating layer having the following composition (in mass %): 20.0-35.0 - of the epoxy dian resin with the epoxy reacting weight of 450-500, 5.0-10.0 - pigments, 5.0-12.0 -fillers, 20.0-35.0 - polyamide curing agents Versamid 115, 10.0-30.0 - micaceous iron oxides, the rest - the organic dissolvents, with the subsequent "up to detachment". After that they apply the third outer layer from the composition containing the following components (in mass %): 20.0-40.0 - the acrylic or polyester hydroxyl-containing resin used as the binder, 10.0-20.0 - pigments, 5.0-10.0 - fillers, 11.0-22.0 - the curing agent - aliphatic polyisocyanate, 0.1-0.5 - the organically modified polysiloxane, the rest - the organic solvents, further the product is dried up to the complete solidification. The invention allows to increase the corrosion resistance of the coating.

EFFECT: the invention ensures the increased corrosion resistance of the coating.

1 tbl, 2 ex

FIELD: petroleum industry; natural gas industry; chemical industry; other industries; production of the compositions used for application of the anticorrosive and heat-insulating coatings on the pipelines.

SUBSTANCE: the invention is pertaining to the field of production of the coatings possessing the anticorrosive and heat-insulating properties at their deposition on the pipeline. The invention is dealt with application of the water-suspension composition including as the binding the water-emulsion polymeric latex composition containing the latex on the basis of the copolymer selected from the group of the (homo) acrylate copolymer, styrene-acrylate copolymer, or styrene-butadiene copolymer, polybutadiene polymer, polyvinylchloride polymer, polyurethane polymer, the polymer or the copolymer on the basis of the vinyl acetate or their mixtures, in the combination with the surface-active substance and the water, and as the filler it contains the mixture of the hollow microspheres ( made out of glass, ceramic, ash, polymers) differed among themselves by the dimensions within the limits of 10-500 microns and the bulk specific gravity within the limits of 650-50 kg/m3 and taken in the certain ratios. As a result of application of this composition as the coating the invention ensures the simultaneous protection of the surfaces against corrosion and the heat insulation and offers the possibility to exercise protection of the substances and the products operating under conditions of the heightened humidity, under the conditions of action of the heightened temperatures, under the conditions of action of the temperatures difference, that is specially important at protection of the metallic pipelines, both the pipelines of the hot-water supply and the natural gas pipelines and petroleum pipelines.

EFFECT: the invention ensures the simultaneous heat insulation and protection of the surfaces against corrosion, the possibility to exercise protection of the substances and the products operating under conditions of the heightened humidity, action of the heightened temperatures and the temperatures difference, that is specially important at protection of the metallic pipelines of the hot-water supply, the natural gas and petroleum pipelines.

3 tbl

FIELD: protective compositions and materials.

SUBSTANCE: invention relates to a method for preparing protective covers being especially such as metal and concrete. Composition comprises silicon emulsion or silicon dispersion as a binding agent, mixture of hollow microspheres distinguishing by size and bulk density values and chosen from group comprising hollow glass microspheres, hollow ceramic microspheres, polymeric hollow microspheres, technogenic hollow microspheres, surface-active substance, titanium dioxide or zinc dioxide and, if necessary, accessory special additives taken in the definite ratio of components. Using this composition the invention provides preparing covers on pipe lines by its applying firstly as a thin layer on cold surface, followed by heating to 200-250°C, repeated its applying on hot surface by thin layer, followed by applying of material on a cover as metallic wire or net, or winding ob pipe line with applied cover by at least band layer as separate bands made of steel (stainless) and wherein these bands (small bands) are covered preliminary with abovementioned composition by at least one side wherein this composition is filled with hollow microspheres and at least one of lateral band surfaces shows alternating `projections and grooves of right-angled form and similar linear sizes. Grooves have flanges equal with grooves square and excluding dense adjoining of bands to pipeline surface in their winding and creating air layer. Joining of separate bands is carried out during winding is carried out using projections and grooves by end puzzle type. Invention provides preparing covers showing good and sufficiently high protective properties: high heat-protecting properties under effect of high temperatures in the range 500-1000°C, good anticorrosive properties and good fireproofing properties that provides multifunctional properties of covers proposed. Invention can be used in protection of pipelines against effect of different negative factors in their exploitation, in part, in protection against corrosion, fire and as heat-protecting cover.

EFFECT: improved and valuable technical properties of composition.

3 cl, 3 tbl

FIELD: thermo-setting heat-activated paint compositions, application of such composition on substrate.

SUBSTANCE: proposed composition contains at least one amorphous binder at Ts below 5C and/or at least one crystalline or semi-crystalline binder at melting point or interval of melting points below 150C, at least one epoxy resin, at least one polyamine including cyanamide groups, at least one blocked or latent catalyst in the amount of 0.5-5 mass-%; this catalyst is deblocked or activated at elevated temperature below hardening temperature of paint composition. Paint composition is characterized by Ts below 5C and viscosity below 2000 mPa·sec measured at temperature of 80C and shift rate of 10 c-1. The method of application of coat to substrate includes the following stages: first, paint composition is heated to temperature of application, then, composition is applied on substrate and paint thus applied is heated to temperature of its hardening till complete hardening. Paint composition is used for application onto mirror reverse surface, onto metal surface or onto substrate sensitive to heating. This composition forms thin anti-corrosive coat free from volatile organic compounds which may be used at temperature of application between 100 and 160C by employing the methods of application at low temperatures.

EFFECT: enhanced efficiency.

15 cl, 3 tbl, 9 ex

FIELD: polymer materials as protective coatings.

SUBSTANCE: invention relates to preparing anticorrosion, fire-resistant, and heat-retention composition for use in oil and gas production industry, petrochemical industry, in municipal economy and other areas, where protection of surfaces against corrosion, heat, and inflammation are required as well as to application of composition as protective coating for metal, concrete, and, in particular, for protection of pipelines operated in permafrost regions, under water surface, and at large temperature and pressure gradients inside and outside pipelines. Composition is composed of 5-95% epoxide resin, 3-65% hardener, 5-95% hollow microspheres, and 0-20% auxiliary additives. Hollow microspheres are selected from group consisting of glass hollow microspheres, ceramic hollow microspheres, polymeric microspheres, hollow man-made microspheres and mixtures thereof. Microspheres are dimensioned within a range 10 to 500 μm with loose density between 650 and 50 kg/m3.

EFFECT: improved performance characteristics of coatings.

2 cl, 1 tbl, 6 ex

FIELD: chemistry of polymers, covers.

SUBSTANCE: invention relates to compositions of film-forming polyurethane compositions. Invention describes a composition for covers comprising the following components, mas. p. p.: polyoxypropylenetriol of molecular mass 3000-5000 Da, 80-95; 4,4'-diphenylmethanediisocyanate-base polyisocyanate, 100-200; ethyl acetate, 35-40; butyl acetate, 30-40; toluene,20-35; concentrated hydrochloric acid, 0.05-0.1, and ethylene glycol, 5-20. Invention provides enhancing adhesion to metal by 2-2.5-fold (up to 8.2 MPa) and enhancing cover hardness by 1.5-1.6-fold (up to 0.85 a. u. by method M-3). Invention can be used in preparing a protective cover for wood, concrete, glass, metal.

EFFECT: improved and valuable technical properties of composition.

1 tbl, 29 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention relates to using polyurethane reactive bicomponent solvent-free composites used for preparing thermostable at temperature below 90°C and compatible with cathode protecting covers. The composite comprises the following components: (A) solvent-free polyhydroxy-component consisting of (A1) 40-100 weight % of simple polyetherpolyol with functionality index ≥ 3.5 and molecular mass 280-1000 Da, or a mixture of some such components, and also (A2) 0-60 weight % of simple polyetherpolyacrylate with from 5.0 to 15 weight % of hydroxyl groups and viscosity index from 300 to 5000 mPa x s at 23°C, and also (A3) 0-60 weight % of other hydroxyl-containing groups of compounds of molecular mass from 32 to 1000 Da and wherein the weight % sum (A1)-(A3) is 100% always, and (B) polyisocyanate component consisting of at least one organic polyisocyanate wherein the equivalent ratio NCO : OH is in the range from 0.8:1 to 1.5:1. Invention provides preparing covers with high permissible prolonged temperature loading below 90°C for protection against corrosion in simultaneous compatibility with cathode protection.

EFFECT: improved and valuable properties of systems.

74 cl, 1 tbl

FIELD: corrosion protection.

SUBSTANCE: invention is designed for use in oil and gas industry, mechanical engineering, in particular to protect internal surfaces of steel fuel tanks and mains, wherein all kinds of petroleum products or various organic solvents can be present. Composition contains 55-35 vol % pre-polymerized polyurethane based on tolylenediisocyanate and diethylene glycol, 35-55 vol % polytrifluorochloroethylene, and 5-10 vol % aluminum powder with particle size no larger than 20 μm.

EFFECT: achieved heat resistance of anticorrosive coating within a working temperature range ±50°C and protective properties of coating when surfaces are treated with steam at 150°C and pressure up to 6 atm.

2 ex

FIELD: rocket equipment; production of intercalated composition for armoring of intercalated charges made out of ballistite fuel.

SUBSTANCE: the invention is pertaining to the field of rocket equipment and presents a filling composition for armoring of for armoring of charges made out of ballistite fuel charges made out of ballistite fuel. The filling composition contains an urethane modifying agent M-11-1 based on the basis of a polybutadiene hydroxyl-containing rubber, a non-saturated polyester resin, butyl methacrylate BMA), a transformer oil, perioxide of methyl-ethyl ketone (PMEK) and cobalt naphthenate (CN-2). The invention allows to produce a solidified material of the filling composition with improved elastic operational characteristics, to decrease a modulus of elasticity more than in 20 times in the range of the temperature from plus 20°C and a minus 50°C, and also to reduce the temperature of brittleness of the solidified filling composition up to minus 78°C.

EFFECT: the invention allows to produce a solidified material of the filling composition, to improve its operational characteristics, to decrease the elasticity modulus in the wide temperature range and the brittleness temperature of the solidified filling composition.

2 tbl

FIELD: explosives.

SUBSTANCE: invention relates to waterproofing materials for heat- and gas-generating solid-fuel borehole charges used for treatment of oil, injection, and gas wells in order to increase productivity and intended to protect surfaces of solid-fuel borehole charges against borehole fluids. Coating is composed of polydiene-urethane-epoxide oligomer rubber as binder, m-phenylenediamine as hardener, and carbon black or carbon black/silica powder mix as filler. Coating operation is accomplished by double immersion of charge into dilute composition and holding therein for 5-10 sec after each immersion.

EFFECT: widened temperature range of heat- and gas-generators, increased reliability of attachment coating to fuel, increased feasibility of coating operation, achieved complete combustion, and reduced price of heat- and gas-generator.

2 cl, 2 ex

FIELD: optical engineering.

SUBSTANCE: invention, in particular, relates to UV solidifying composition based on urethane acrylates and containing 6.0-19.3 wt parts of hydroxyalkylacrylate and 1-5 wt parts of light initiator, said urethane acrylate base being mixture of 30.0-82.0 wt parts of interaction product of poly(oxypropylene glycol), 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio (1-2):(2-3):(2-2.1):(0.003-0.33)] with 4.7-60.0 wt parts of interaction product of 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio 1:(2.5:(0.004-0.065)]. Fiber light guide consisting of quartz optical fiber enrobed by above-defined composition is further described. Loss of light in light guide is thus lowered to 0.42-0.23 dB/km. Rupture strength is thus increased by 7.0 GPa.

EFFECT: increased rupture strength and reduced light loss.

2 cl, 1 tbl, 8 ex

The invention relates to odnoupakovochnye polyurethane film-forming, curing air moisture, which can be used as a varnish or binder in the polymer compositions having anti-corrosion properties

The invention relates to methods of producing polyurethane prepolymers, which are designed to produce coatings to protect metal, concrete, wood, glass surfaces from the effects of various atmospheric and corrosive environments, corrosion, static electricity, abrasive wear and can be used as a protective internal and external coating of pipes, vessels and tanks, engineering and hydraulic structures, power plants, port facilities, roofing and shingles, as well as decorative coatings

The invention relates to polyurethane compositions, curable air moisture, designed to create a protect against dampness coating metal, wood and concrete surfaces in industrial and road construction during the construction of bridges and tunnels, mechanical engineering, impregnation of fabrics and other textile materials

The invention relates to compositions of odnoupakovochnye polyurethane compositions, cured by moisture in air and applied as a separate coating or compositions filled with paint and varnish materials for anti-corrosion and waterproof protection of wood, metal, concrete and reinforced concrete

FIELD: optical engineering.

SUBSTANCE: invention, in particular, relates to UV solidifying composition based on urethane acrylates and containing 6.0-19.3 wt parts of hydroxyalkylacrylate and 1-5 wt parts of light initiator, said urethane acrylate base being mixture of 30.0-82.0 wt parts of interaction product of poly(oxypropylene glycol), 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio (1-2):(2-3):(2-2.1):(0.003-0.33)] with 4.7-60.0 wt parts of interaction product of 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio 1:(2.5:(0.004-0.065)]. Fiber light guide consisting of quartz optical fiber enrobed by above-defined composition is further described. Loss of light in light guide is thus lowered to 0.42-0.23 dB/km. Rupture strength is thus increased by 7.0 GPa.

EFFECT: increased rupture strength and reduced light loss.

2 cl, 1 tbl, 8 ex

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