RU2532191C2 - Composition for protecting structures - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: composition contains the following in wt %: a branched saturated polyester polyol - 10-40, a catalyst - 0.01-3, pigments - 1-20, a dispersant - 0,1-5, an aliphatic polyisocyanate - 15-40, a polyether acrylic polyol - 5-30, a flow additive - 0.005-2, organic solvents - the balance. The branched saturated polyester polyol is obtained by polyesterification of polyatomic alcohols with cycloaliphatic anhydrides and phthalic anhydride after melting the polyatomic alcohols and esterifying the obtained melt to acid number of 3-15 mg KOH/g. Isophthalic acid is added at the esterification step and adipic acid is added after the esterification step.

EFFECT: longer working life of the composition, improved tensile strength and hardness of the coating and thermal cycling resistance of the coating.

6 cl, 2 tbl, 6 ex

Description

The invention relates to compositions for protecting structures of metal, fiberglass and the like, used in the aviation, automotive, railway and other industries.

Closest to the composition proposed according to the present invention, the composition is a composition for protecting metal structures described in the patent of the Russian Federation 2407756. The composition contains two components:

1. component A, including in the following ratio, wt.%:

a catalyst selected from the group of organotin compounds 0.1 ÷ 1.0 molecular sieves 5.0 ÷ 10.0 aminoethylaminopropyltrimethoxysilane 0.1 ÷ 2.0 glycidoxypropyltrimethoxysilane 0.1 ÷ 2.0 pigments 1,0 ÷ 2,0 deaerators 0.01 ÷ 0.1 aerosil 1,0 ÷ 2,0 dispersant 0.1 ÷ 0.2 branched saturated polyester polyol rest

and component B, which is an aliphatic polyisocyanate derived from hexamethylene diisocyanate, isocyanurate and / or isocyaniuret. Examples of polyisocyanates include Desmodur N 3200 and / or Desmodur N 3300 manufactured by Bayer

The ratio of components A: B when mixing 1: 1 by volume with a possible deviation from the specified ratio of ± 15%.

The organosilicon compounds used, aminoethylaminopropyltrimethoxysilane [H2NC2H4NHC3H6-Si (OCH3) 3] and glycidoxypropyltrimethoxysilane [CH2 (O) CHCH2C3H6-Si (OCH 3) 3], correspond to the trademarks Z-6020 Silane and Z-6040 Silane CORING, respectively, ®. Molecular sieves are synthetic zeolites with a crystal lattice of type A, with a pore diameter of 3 Å, for example Siliporit® SA 1720, manufactured by CECA. Vuk-066 is usually used as a deaerator, the dispersant, as a rule, is Disperbyk-185 (manufactured by Byk-Chemie), and A-380 brand aerosil is used as a thixotropic additive. Pigments are usually selected from the group of iron oxide, for example Bayferrox 318 M manufactured by BAYER. As the catalyst, it is preferable to use dibutyldylauratin or dibutyl diacetate.

BYK-066 - fluorine-modified polysiloxane with a wide range of uses, has the properties of a deaerator and defoamers,

DISPERBYK 185 - a high molecular weight humidifier, dispersant, wetting agent, is a solution, a high molecular weight block copolymer.

Aerosil grade A-380 is a fumed silica (silicon dioxide).

Branched saturated polyester polyol is obtained by esterification of a polyhydric alcohol and dibasic acids.

However, this composition for the protection of metal structures has insufficient tensile strength and hardness of the coating, low viability of the composition, low resistance of the coating to thermal cycling.

The technical task of this invention is to increase the viability of the composition, tensile strength and hardness of the coating, the resistance of the coating to thermal cycling.

The stated technical problem is solved in that the composition for protecting structures containing a branched saturated polyester polyol, a catalyst, pigments, a dispersant, an aliphatic polyisocyanate, further comprises a polyester acrylic polyol, an additive for filling, organic solvents, and a branched saturated polyester polyol as a saturated branched complex polyether polyol obtained by polyesterification of polyhydric alcohols with cycloaliphatic anhydrides and phthalic anhydride, p eds which produce the melting of polyhydric alcohols and the esterification of the resulting melt to an acid number 3-15 mg KOH / g, the esterification step is additionally introduced isophthalic acid, and after the esterification step is introduced adipic acid, with the following component ratio, wt.%:

saturated branched complex polyether polyol obtained by polyesterification polyhydric alcohols cycloaliphatic anhydrides and phthalic anhydride, before which produce polyatomic fusion alcohols and esterification of the obtained melt to acid number 3-15 mg KOH / g, at the stage esterification is additionally administered isophthalic acid, and after the esterification step, adipic acid 10.0-40.0 catalyst 0.01-3.0 polyester acrylic polyol 5.0-30.0 aliphatic polyisocyanate 15.0-40.0 pigments 1,0-20,0 filling additive 0.005-2.0 dispersant 0.1-5.0 organic solvents rest

The composition may further comprise polycaprolactone in an amount of 0.1-10.0 wt.%, A matting agent in an amount of 0.1-10.0 wt.%, A thickener, for example cellulose acetate butyrate, in an amount of 0.1-10.0 wt. % and / or filler in an amount of 0.1-15.0 wt.%.

As a saturated branched complex polyester polyol, a specially designed polyester binder is used, obtained by polyesterification of polyhydric alcohols with cycloaliphatic anhydrides and phthalic anhydride, before which polyhydric alcohols are melted and the resulting melt is esterified to an acid number of 3-15 mg KOH / g, isoform is additionally introduced with isoform and after the esterification step, adipic acid is introduced. In this case, the polyester binder has the following characteristics:

Appearance - a homogeneous transparent liquid without mechanical impurities.

Color on the iodometric scale - 20 mg 1 g / 100 g.

The content of hydroxyl groups 5-10 wt.%

The content of non-volatiles in the binder is 63-67%.

The acid number is 4-10 mg KOH / g.

As polyester acrylic polyol with a content of hydroxyl groups of 3-5% by weight, polyester acrylic polyol with a content of hydroxyl groups of 3-5% by weight of Setalux 1151XX-51 and / or a polyester acrylic polyol with content of hydroxyl groups of 3-5% by weight of Setalux 1152XX -51 from Nuplex, The Netherlands and / or polyester acrylic polyol with a content of hydroxyl groups of 3-5 wt.% Syntalat A-TS 3594 from Synthapol, Germany and others.

As pigments, titanium dioxide, carbon black, red iron oxide pigment, blue phthalocyanine pigment and others are used.

As an additive for filling use BYK-331 and / or BYK-333, which is a dimethylpolysiloxane polymer modified with a polyester, and / or BYK-306, which is a solution of a dimethylpolysiloxane copolymer modified with a polyester, and / or BYKETOL OK, which is a a combination of high boiling aromatic solvents, ketones and esters, and / or BYKETOL-SPECIAL, which is a combination of high boiling aromatic solvents, ketones, esters and polysiloxanes, and / or BYK-323, representing th a polimetilalkil alkylaralkyl-siloxane, the firm Byk-Chemie, Germany.

As a dispersant, Disperbyk-103 is used, which is a solution of a phosphoric acid ester copolymer and / or Disperbyk-163, which is a solution of high molecular weight polyurethane, and / or Disperbyk-166, which is a solution of high molecular weight polyurethane, and / or Disperbyk-180, which is an alkyl ammonium salt of phosphoric acid ester and / or Disperbyk-2000, which is a modified acrylic block copolymer, byk-Chemie, Germany, and / or EFKA 4010, which is a modified polyurethane, and / or EFKA 4055, which is high molecular weight modified polyurethane, BASF, Germany.

As a catalyst, tin dibutyl dilaurate and / or tin dibutyl diacetate and / or triethylenediamine and others are used.

Derivatives of hexamethylene diisocyanate are used as the polyisocyanate: trimers Desmodur N3300 and / or Desmodur N3390 and / or biuret Desmodur N75MPA / X from Bayer, Germany and / or Tolonate HDB 75MX - aliphatic polyisocyanate solution, biuret and / or Tolonate HD polyisocyanate , trimer and / or Tolonate HDT 90 - solution of aliphatic polyisocyanate, trimer, Perstorp, France and / or Basonat HB 175 MP / X - solution of aliphatic polyisocyanate and / or Basonat HI 100, aliphatic polyisocyanate, isocyanurate, company Basf, Germany and / or Uronal NL - aliphatic polyisocyanate, biuret and / or Uronal NL 100 - aliphatic polyisocyanate, trimer from Galstaff Multiresine SpA., Italy and others.

As organic solvents, methoxypropyl acetate and / or butyl acetate and / or methyl ethyl ketone and / or xylene and others are used.

As polycaprolactone, polycaprolactone of the CAPA 3050 and / or CAPA 2100Ai / or CAPA 4101 brands from Perstorp, Sweden and others is used.

Ceraflour 913, Byk-Chemie, Germany, which is micronized polypropylene wax and / or Acematt TS-100, which is thermal silicic acid without surface treatment and / or Acematt OK-500, which is precipitated silicic acid with surface treated and / or Acematt 3300, which is a surface-treated thermal silicic acid, from Evonik, Germany and others.

As a thickener, cellulose acetate butyrate of the CAB 381 and / or CAB 551 and / or Benton SD-2 grades is used, which is an organic modification of layered silicate of bentonite and / or Thyxatrol ST, which is an organic additive based on a castor oil derivative from Elementis, USA.

Microtalc and / or barium sulfate and / or kaolin and others are used as filler.

A composition for protecting structures is prepared as follows: in a working tank, part of a saturated branched complex polyester polyol and / or polyester acrylic polyol is mixed with dispersants, pigments and some organic solvents. The resulting mixture is dispersed in a bead mill, then a composition is carried out in which the remaining saturated branched complex polyether polyol and / or polyester acrylic polyol, a bottling additive, other organic solvents and a catalyst are added to the pigment paste made at the bead mill. Polycaprolactone may be administered at any stage in the manufacture of the composition. Matting additive, thickener can be introduced at the final stage of the manufacture of the composition. The filler can be introduced at the initial stage of manufacture before dispersion in a bead mill.

Before use, an aliphatic polyisocyanate is added to the composition.

The composition for protecting structures is preferably applied by primer by air spray, airless spray, and brush.

Examples of compositions according to the invention are shown in table 1. The properties of the compositions according to the invention in comparison with the prototype are shown in table 2.

As can be seen from table 2, the proposed composition for protecting structures in comparison with the prototype has a higher viability of the composition, better tensile strength and hardness of the coating, more than one and a half times higher resistance of the coating to thermal cycling. When applied on a primer, it has three times greater resistance to the static effects of gasoline, almost two times greater resistance to the static effects of oil, salt fog and high humidity.

Table 1 Name of components Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 1. Branched saturated polyester polyol 10 twenty 40 17 fifteen 35 2. Polyester acrylic polyol Setalux 1152XX-51 27 eighteen Setalux 1151XX-51 thirty 23 SyntalatA-TS3594 5 5 3. Pigments Titanium dioxide 19.48 1,5 19.48 1,5 Red iron oxide pigment 0.5 0.1 Soot 0.02 one 0.5 0.02 one 0.5 4. Additive for bottling BYKETOL-SPECIAL 1.3 1.3 BYK-306 0.1 0.1 BYK-333 0.5 0.01 0.5 0.01 BYK-331 0.1 0.005 0.1 0.005 5. Dispersant Disperbyk-180 four 0.05 5 0.05 Disperbyk-163 one 0.05 one 0.05 Disperbyk-163 one 6. The catalyst Tin Dibutyl Dilaurate 0.01 0,03 0.01 0,03 Triethylenediamine 3 3 7. Polyisocyanate Desmodur N3390 twenty 22,99 Desmodur N75MPA / X 40 40 Desmodur N3300 fifteen fifteen 8. Polycaprolactone SARA 3050 5 9. Matting additive Ceraflour 913 5 10. Thickener Cellulose Acetobutyrate CAB 381 6 11. Filler Microtalc 5

12. Organic solvents Methoxypropyl acetate 0.5 one 8 2 one 7 Butyl acetate 1,5 2,8 17 5 3 16 Xylene rest

table 2 The name of indicators GOST Prototype Prototype applied to a substrate pre-primed with a VG-27 primer Example 1 according to the invention Example 2 according to the invention Example 3 according to the invention Example 4 according to the invention Example 5 according to the invention Example 6 according to the invention Example 3, applied to a pre-primed primer VG-27 substrate The strength of the coating upon impact at a temperature of minus (40 ± 5) ° C, J 4765 22 22 22 23 23 23 23 22 23 Resistance to thermal cycling from minus 60 to plus 20 ° C, the number of cycles without cracking and peeling 10 10 16 16 17 16 16 17 17 Resistance to thermal cycling from minus 60 to plus 80 ° C, the number of cycles without cracking and peeling 6 6 16 16 17 16 16 16 17 Hardness of the coating according to the TML instrument, pendulum A, conventional unit 5233 0.2 - 0.55 0.57 0.58 0.55 0.55 0.59 - Enamel drying time at 20 ± 2 ° С, h 19007 twenty twenty 7 8 9 7 9 6 9 The viability of the composition, h 27271 0.5 0.5 7 8 6 7 7 6 6 Tensile strength before thermal aging test from minus 20 ° С to plus 20 ° С, cm 29309 5 5 9.5 10 10 9 9 9 8 Tensile strength after thermal aging test from minus 20 ° С to plus 20 ° С, cm 29309 3 3 8 8 8.5 7.5 8 6 6 Resistance to static effects of gasoline, h 9.403 - 300 - - - - - - 1000 Resistance to static oil, h 9.403 - 800 - - - - - - 1500 Resistance to salt fog at (35 ± 2) ° С, h 9.401 - 400 - - - - - - 1000 Resistance to high humidity at (40 ± 2), h ISO 6270-1 - 400 - - - - - - 1000

Claims (6)

1. A composition for protecting structures containing a branched saturated polyester polyol, a catalyst, pigments, a dispersant, an aliphatic polyisocyanate, characterized in that it additionally contains a polyester acrylic polyol with a content of hydroxyl groups of 3-5 wt.%, An additive for filling, organic solvents, and as a saturated branched complex polyether polyol, a branched saturated polyester polyol obtained by polyesterification of polyhydric alcohols with cycloaliphatic anhydrides and phthal acid anhydride, before which polyhydric alcohols are melted and the resulting melt is esterified to an acid number of 3-15 mg KOH / g, isophthalic acid is additionally introduced at the esterification stage, and adipic acid is introduced after the esterification stage in the following ratio of components, wt.%:
saturated branched complex polyether polyol obtained by polyesterification polyhydric alcohols cycloaliphatic anhydrides and phthalic anhydride, before which produce polyatomic fusion alcohols and esterification of the obtained melt to acid number 3-15 mg KOH / g, at the stage esterification is additionally administered isophthalic acid, and after the esterification step, adipic acid 10.0-40.0 catalyst 0.01-3.0 polyester acrylic polyol 5.0-30.0 pigments 1,0-20,0 filling additive 0.005-2.0 aliphatic polyisocyanate 15.0-40.0 dispersant 0.1-5.0 organic solvents rest 2. The composition according to claim 1, characterized in that it further comprises polycaprolactone in an amount of 0.1-10.0 wt.%. 3. The composition according to one of claims 1, 2, characterized in that it further comprises a matting additive in an amount of 0.1-10.0 wt.%. 4. The composition according to claim 1, characterized in that it further comprises a thickener in an amount of 0.1-10.0 wt.% And / or a filler in an amount of 0.1-15.0 wt.%. 5. The composition according to claim 2, characterized in that it further comprises a thickener in an amount of 0.1-10.0 wt.% And / or a filler in an amount of 0.1-15.0 wt.%. 6. The composition according to claim 3, characterized in that it further comprises a thickener in an amount of 0.1-10.0 wt.% And / or a filler in an amount of 0.1-15.0 wt.%.