LT4359B - Anticorrosive mastic - Google Patents

Abstract

Invention is being attributed to the domain of protective coatings, namely to anticorrosive bitumen-polymer mastics, intended for protection of car bottoms against corrosion, for protection of other metal structures against atmospheric corrosion and for concrete waterproofing. In order to improve mastic anticorrosive properties, enhance penetration, additionally to the anticorrosive mastic, that contains oil bitumen, polymer, wax, aggregate, anticorrosive additive, organic solvent, there are included used oil products at the following component ratio (mass percentage): oil bitumen 30-50; polymer 1.5-6; used oil products 5-45; waxes 3-6; aggregate 3-7; anticorrosive additive 3-6; organic solvent - up to 100.

Description

BACKGROUND OF THE INVENTION The present invention relates to the field of protective coatings, namely, anti-corrosion bitumen-polymer mastics for corrosion protection of car bottoms, weathering corrosion protection of other metal structures and waterproofing of concrete.

In order to improve the anti-corrosive properties of mastic, to increase penetration, the anti-corrosive mastic containing petroleum bitumen, polymer, waxes, filler, anti-corrosive additive, organic solvent additionally includes used petroleum products in the following proportion (w / w):

petroleum bitumen 30 - 50 polymer 1.5-6 used petroleum products 5 - 15 waxes 3 - 6 filler 3 - 7 anticorrosive additive 3 - 6 organic solvent up to 100.

BACKGROUND OF THE INVENTION The present invention relates to the field of protective coatings, namely anti-corrosion bitumen polymer mastic, for the protection of automotive bottoms against corrosion, other metal structures against atmospheric corrosion and concrete waterproofing.

Known protective lubricant containing bitumen, divinylstyrene thermoelastoplast, oxidized petrolatum, aluminum powder, nitrated oil based product, organic solvent (see USSR Authorization No.896908, CIOM 7/02)

However, this protective lubricant does not adequately protect metal surfaces from corrosion.

The closest solution to the proposed solution by component is an anti-corrosion composition of bitumen polymer which comprises (by weight): petroleum bitumen 22.0-32.0; butadiene-styrene thermoelastoplast 40,060,0; butyl rubber 40.0-60.0; oxidized petrolatum 40.0-60.0; supplement AKOR-1 8.0-12.0; aluminum powder 40.0-60.0; coal xylene 16.0-24.0; N - (2,2,2-Trichloro-1-oxyethyl) -o-nitrobenzenesulfenamide 1.0-5.0. (See USSR Authorized Certificate # 1657521, CO9D 195/00, 5/08)

However, the AKOR-1 additive and oxidized petrolatum used in this composition have the property of highly thickening the mastic, which reduces its spread on the metal surface and worsens its anticorrosive properties.

The object of the present invention is to improve the anticorrosive properties of mastic by increasing the penetration of mastic into hard to reach areas of the surface to be painted, cracks.

The goal of the achievement is that the anti-corrosive mastic containing petroleum bitumen, polymer, waxes, filler, anti-corrosion additive, organic solvent additionally contains used petroleum products in the following component ratio (% by weight):

petroleum bitumen 30-50 polymer 1.5-6 used petroleum products 5-15 waxes 3-6 filler 3-7 anticorrosive additive 3-6 organic solvent up to 100

The present invention has a fundamental difference. It uses once-used petroleum products to increase the penetration of mastic, and at the same time to improve its anticorrosive properties. used motor, compressor, industrial, vacuum lubricants. The use of these lubricants in combination with other components not only improves the properties of the mastic, gives the desired consistency, but also makes the finished product cheaper. No one used oil products in the past in anti-corrosive mastics.

Mastics use the following materials:

• petroleum bitumen with a softening point> 70 ° C

Petroleum bitumen takes up 30-50% by weight. It is not technologically feasible to enter a higher quantity, and a smaller quantity is impractical. With a smaller amount (lacking film footage), the mastic coating power decreases, i.e. the protected surface becomes thinner, which reduces anti-corrosion protection and degrades the soundproofing properties of the mastic.

• polymer - divinylstyrene thermoelastoplast DST-30, butyl rubber BK2045T, or a mixture thereof: nairite (chloroprene rubber).

The polymer additive improves the elastic properties of the coating. It also improves the resistance of mastic to cold, heat, impact, abrasion and cohesive properties.

The optimum amount range is 1.5-6% by weight. In smaller quantities, the above effect is undetectable, and with a significant increase in polymer content, the desired properties change insignificantly and the product price increases. The best effect is obtained by using rubber blends, i.e. DST-30 with butyl rubber or DST-30 with nairite.

• Used Petroleum Products - Used motor, compressor, industrial or vacuum lubricants.

Greases plasticize the coating, increase mastic permeability and influence better bitumen modification with the polymer (resulting in a homogeneous, non-layered mass over time). The optimum amount range is 5-15% by weight. At lower levels, the desired effect is not achieved, and at higher levels, heat resistance is impaired.

• Waxes - Petrolatum, Ceresin 80, Peat, Ozokerite.

Waxes are films that slightly thicken the mastic and improve its protective properties and plasticize the coating. The optimum amount range is 3-6% by weight.

• Fillings - kaolin, aluminum powder, rubber grits.

The purpose of the fillers is to improve the mechanical properties of the coating: impact resistance, heat resistance, abrasion. However, increasing the amount significantly reduces the abrasion resistance of the coating. Using fillers within the optimum range of 3-8% by weight gives the best effect. The best results are achieved with filler mixtures: kaolin with aluminum powder in the ratio 0.5: 1 to h 1: 2; kaolin with rubber groats, 1: 1 m - 1: 2 ratio • anticorrosive additive - additive S-150 (TS-38.101685-84), bitumen cucersol component Kukersol, IFCHANGAZ-I, technological mixture VRPS-150 (TS 38-5901192-91 )

The anticorrosive additive other than Kukersol ¹¹ is a corrosion inhibitor concentrate in petroleum lubricants. Their optimum range is from 3 to 6% by weight.

At lower levels, the desired effect is not achieved and at higher magnifications, the effect is negligible and the product becomes more expensive.

Kukersol is a recycling product for the slate industry which, in addition to its good anticorrosive properties, is a good antiseptic which is important when using mastic for waterproofing concrete.

• organic solvents such as xylene or petroleum solvent (GOST 10214-78) in admixture with white spirit (GOST 3134-78).

Solvent or xylene mixture with white spirit accelerates the drying of mastic, improves adhesion to the metal surface and decreases the adhesion of mastic. Examples of anti-corrosion mastic are given in Table 1.

table

TAnti corrosive 7 ___ Quantity of components, masses ^^ in examples ___ Ί! mastic components i1 T2 Τδ T4 Τδ T6 Tf Τδ! ~ 9!

I η -----! ----- | ----- to -----, -----, ----- to -----, -----, -----!

I________________I___L___I___I___I___I___I___I___I___I

TNąftos_biturn ______ 733 _T40 _T30 _T34 _T35 _T40 _T42 _T38 _Τδ0__Ί ^ Polymer _________ ι ~ 3__Τ4__Τδ__Τ6__Τ3__Τΐ_, δ_Τ3__Τ4__Τ2 __Ί ^ Tl0 Tl2 ΤΤ T'0 Tl2 Τ T'0 '___' i_Waxes ____________ i 6__ι 5_ i 4 i 5 i 3 i 5 Τδ Τδ T3 Ί (Filler Τβ ΤΑ Τδ Γβ 77 ΐ ~ 6 ΐ ~ 3 ^__ Τ4 ΐ ~ 7 ΐ ¹ PL '? das__ I 5__I 4__I 3 _ ι 3__I 5 ι 6 ι 3 ι 5 ι 6 ι

Organic solvent ____ 739 _ T33 _ Τ41_ ΤΑ 1__ TŠ2 Š ^ 36,5 3634 ZTŠ4 ^_ Τ20 ”Ί

Anti-corrosion mastic is produced in the following way:

22 kg of solvent, 10 kg of grease, 1 kg of bitumen and 5 kg of wax are added to the reactor with stirrer on heating. The components are mixed at 110 ° C until homogenous. Then add 3 kg filler and 3 kg anti-corrosion additive. The mass is cooled to 70-80 ° C with stirring. This is followed by the addition of 15 kg of pre-made 20% polymer solution. The mass is stirred for about 1 hour, then homogenized.

Anticorrosive properties of mastic are determined by tests. For each mastic sample, take 3 metal plates, clean them cleanly. For determination of adhesion, heat resistance and corrosion in the SO2 chamber, the plates are applied with two layers of mastic and tested after 14 days. Penetration is determined by a special device. The ability to displace the electrolyte is determined as follows; Immerse the cleaned plates in a 3% NaCl solution, remove and drip mastic after 2 seconds.

table

Indicators Pro- i Examples of proposed mastic toti-! at! 1 »1 1 1 _Λ 1 1 To 1 ι1 ι2ι3ι4ιδι6ι7ι8 ! 9th Adhesion with Γ * T T, T. T "Γ. T * T ", T" 1 I 1 I 1 1 1-2 1 2 1 1 1 1 1 1 1 1 rr of metal, scoring III 1 1 I 1 1 III 1 1 1 1 1 i I Resistance Ί20 T120 T125 Γ125 T125 Γ110 ΪΊ10 Γ120 Γ120 20120

for heat, + ° C

Penetration, ί 15 mm! 1 ---- 1 hold on 00 | ! 31st 1 1 i 43 1 1 T40 1 l f 56 1 1 Oh ICO | ---- 1 T49 I 1 Γ45 1 1 T48 1 l - ! Noo-! 25th ! 37 Ϊ40 ! 32 T35 0 ICO 1-1 ? 30 T33 Γ39 ! 29th ! rinis! 1 1 l 1 1 1 1 1 1 1 1 1 1 1 l 1 1 1 Able 0.! 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ejected ! mm! 1 1 1 I 1 I 1 | 1 | 1 j 1 I 1 1 1 | ti 3% NaCl ! vid- ΐ 15 ! 20th ! 20th ί 20 ! 20th ! 20th ! 20th ! 20th ! 20th ί 20 solution i nis i 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 from ! 0,: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 metal ! mm! 1 1 1 1 1 1 1 1 1 I 1 I 1 I i I l | superficial Tko-To, 5 ! 0 ! 0 ! o ! 0 ! 0 ! 0 ! 0 ! 0 ! 0 shs ! rosy! 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ! her! 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 t 1 1 ! %! 1 1 1 | 1 | 1 1 1 1 1 1 Corrosion so ₂ Ti ! 0 ! 0 To, 05 ! 0 ! 0 "T ' 1 0 ! 0 ! 0 : 0 in the chamber I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 (14 days) % i 1 1 1 1 1 1 1 1 1 l 1 1 1 1 1 i 1 1

Note: In determining the permeability and the ability to displace the electrolyte - 3% NaCl solution, the anticorrosive mastic is diluted 1: 1 with xylene.

Table 2 shows that the anticorrosive mastic according to the invention not only corresponds to the prototype indices in all quality indicators, but also exceeds them: heat resistance, permeability (2.5 times); is capable of displacing 3% NaCl solution (1.5 times) with anti-corrosive properties.

The present invention allows to increase not only corrosion resistance, permeability, ability to displace 3% NaCl solution. The production of this anticorrosive mastic will help to prevent environmental contamination by waste lubricants and reduce the cost of the product.

Claims (1)

Definition of the Invention Anti-corrosive mastic containing petroleum bitumen, polymer, wax, filler, anti-corrosion additive, organic solvent, other than containing added petroleum products in the following proportion by weight (% by weight): petroleum bitumen 30-50 polymer 1.5-6 used petroleum products 5-15 waxes 3-6 filler 3-7 anticorrosive additive 3-6 organic solvent up to 100