Bitumen emulsion

 

(57) Abstract:

The invention relates to cationic bitumen emulsions, which are used as the binder material for the device and repair the road surface, and can be used for rough-surface treatment and for patching of the road surface. Bitumen emulsion according to the invention includes, in wt.%: bitumen 66-69, hydrochloric or acetic acid 0,20-0,24, amine emulsifier 0,3-3,0, latex 2,0-6,0, water - the rest. Latex is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64%, amine emulsifier has the following General formula: RCH(OH)CH2OTHER1NH2where R is an aliphatic radical WITH20-26or26-28, R1- (CH2)6- or -(CH2CH2NHnCH2CH2where n=1,2. Bitumen emulsion provides improved adhesion properties, including strong adhesion of the film binder with mineral materials such as acidic and basic rocks, enhances elasticity and the elasticity of the binder. The durability of the road surface with a rough-surface processing, carried out using a binder according to the invention, increases in 2-2,5 times. 4 is Arial for the installation and repair of road surface, and can be used for rough-surface treatment and for patching pavement.

Known cationic bitumen emulsions, including oil bitumen emulsifier in the form of surface-active substances (surfactants) type amines or diamines, or polyamines, or Quaternary ammonium salts, water and the acid is hydrochloric or acetic acid, or phosphoric (see valid GOST 18659-81 “Emulsion bitumen road, ratified by the Decree of the USSR State Committee on Affairs of construction 31.12.1980, No. 218, S. 3).

Known bitumen emulsion for road construction, including bitumen, hydrochloric or acetic acid, amine emulsifier and water, and as amine emulsifier it contains a Quaternary ammonium compound of General formula

where R1radical of aliphatic hydrocarbons containing 16-18 carbon atoms;

R2and R3radical CH3or2H5or a hydrogen atom;

R4radical CH3or2H5-,

And anion CH3SO4- C2H5SO4-,

x+y10,

and at least one component from the group of:

alkoxy alkylamine with the number of alkoxysilane 3-8 and/or at least a component of the group alkylamino, containing in the chain of 10-16 carbon atoms and a Quaternary ammonium compound containing in the chain of 8-22 carbon atoms in the following ratio, wt.%: bitumen 45-75, hydrochloric or acetic acid of 0.03 to 5.0, the Quaternary ammonium compound is 0.05-4,8 specified component from the group of: alkoxycarbonyl alkyl phenol, alkoxycarbonyl alkanol and alkoxycarbonyl alkylamine of 0.01 to 3.0, the specified component from the group of:

alkylamine and the Quaternary ammonium compound is from 0.01 to 3.0, water - other (see USSR author's certificate No. 1359281, IPC C 08 L 95/00, 04 26/26, publ. 15.12.1987,, bull. No. 46).

Bitumen emulsion has improved stability during storage.

The disadvantage of the bitumen emulsion is that it is, having a high degree of enveloping, has a low adhesion of the film binder with mineral material, i.e., the rate of adhesion is not more than 50% of the covered area. To improve adhesion requires the additional use of special additives, so-called adhesive.

Closest to the claimed is cationic bitumen emulsion for road construction, including bitumen, hydrochloric or acetic acid, miniprimer General formula RCH(OH)CH2OTHER1NH2where R is an aliphatic radical WITH20-26or26-28, a R1- -CH2)6- or -(CH2CH2NHnCH2CH2- where n = 1, 2, in the following ratio, wt.%: bitumen 45 - 65, the emulsifier is 0.1 - 4, hydrochloric or acetic acid 0.05 to 0.6, the water - up to 100% (see RF patent №2184753 “Cationic emulsion for road construction”, IPC C 08 L 95/00, 04 26/26, priority from 19.02.2001, publ. 10.07.2002).

Known cationic bitumen emulsion due to its liquid consistency has good indicator of adhesion (i.e., wettability and adhesion) film astringent, acidic mineral material and does not provide good adhesion with the main mineral material.

A disadvantage of the known cationic bitumen emulsion is that it cannot be applied for rough-surface treatment pavement in mind the impossibility of allocating its thin even layer due to insufficient elongation of the residual binder selected from the bitumen emulsion.

The technical result of the proposed technical solution is the improvement of adhesion (adhesion) of a film of binder in both acidic and basic the tee and the elasticity of the residual binder, isolated from the emulsion, as well as increasing the durability of the road surface.

The claimed technical result is achieved in that the bitumen emulsion for road construction, including bitumen, hydrochloric or acetic acid, amine emulsifier in the form of a hydroxyl-containing aliphatic polyamine General formula RCH(OH)CH2OTHER1NH2where R is an aliphatic radical WITH20-26or26-28, R1- (CH2)6- or -(CH2CH2NHnCH2CH2-, where n = 1,2, and water, according to the invention additionally contains latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64% in the following ratio, wt.%:

Bitumen 66-69

Hydrochloric acid 0,20-0,24

Amine emulsifier 0,3-3,0

Latex 2,0-6,0

Water The Rest

Introduction to bitumen emulsion latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64% and representing an emulsion of synthetic rubber, in the present limits helps to enhance the action of the emulsifier and at the same time to improve the adhesive properties of bitumen EMLA road surface, by providing complete chemical affinity of asphalt emulsion and mineral material as acidic and basic character, which in turn increases the durability of the road surface.

In addition, the latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64%, improves elasticity of the residual binder selected from the bitumen emulsion, and therefore, its extensibility, which allows you to evenly distribute bitumen emulsion on the road surface in a thin layer.

Technical solutions, which coincides with the set of essential features of the claimed invention, is not revealed, which allows to make a conclusion on the compliance of the claimed invention to such a condition of patentability as “novelty”.

Declare the essential features that determine the receipt of the indicated technical result that is explicitly not follow from the prior art, which allows to make a conclusion on the compliance of the claimed invention to such a condition of patentability as “inventive step”.

The condition of patentability “industrial applicability” is confirmed by the examples of specific compositions bozmognocti of carrying out the invention”.

For the preparation of bitumen emulsions used the following components.

1. Bitumen.

For the preparation of emulsions used bitumen grade BND 90/130 with the following physico-mechanical characteristics, which are shown in table 1. Physical-mechanical parameters of the initial bitumen meets the requirements of GOST 22245-90.

2. Amine emulsifier.

To the emulsion were used amine emulsifier in the form of a hydroxyl-containing aliphatic polyamine General formula RCH(OH)CH2OTHER1NH2where R is an aliphatic radical WITH20-26or26-28, R1-(CH2)6- or -(CH2CH2NHnCH2CH2-, where n=1,2, the characteristics of which are presented in table 2.

3. The latex.

As latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64% was used Butanol NS 198 German company Basf.

Chemical characterization - water dispersion based on 64% of polymer based on butadiene and styrene, 36% of the aqueous phase.

Physical and chemical properties

Condition Is 100°C borders no explosion, density 0.95 g/cm3the solubility in water miscible pH =4,2-5,2, dispersion type is cationic, a particle diameter of 0.1 to 2.5 μm, the viscosity of 1600 mPa·S., frost - non-frost resistant.

4. The acid.

For the preparation of emulsions used hydrochloric acid synthetic technical according to GOST 856-95 or acetic acid according to GOST 6968-76.

5. Water.

For the preparation of emulsions used water of medium hardness not higher than 6 mEq/L.

Preparing the compositions of bitumen emulsions described in examples 1-3, used for rough-surface treatment (SPA) pavement, wt.%.

Example 1.

Bitumen 66

Hydrochloric acid 0,2 (to pH=2,2)

Amine emulsifier 0,35

Latex “Butanol NS 198” 2,0

Water The Rest

Example 2.

Bitumen 66

Hydrochloric acid 0,2 (to pH=2,2)

Amine emulsifier 0,35

Latex “Butanol NS 198” 3

Water The Rest

Example 3.

Bitumen 66

Hydrochloric acid 0,2 (to pH=2)

Amine emulsifier 0,35

Latex “Butanol NS 198” 6,0

Water The Rest

Bitumen emulsion g is x, V=2000 l For this was gained about 1200-1400 liters of warm water with t°40-50°C.

Then through the dipstick in the same tank was filled in the estimated amount of the acid Hcl and included a stirrer. Then, through the dipstick in the same tank was filled in the estimated amount of the emulsifier, the level of the aqueous phase was brought to 1800 liters, after which the mixture was mixed for 5-10 minutes. At the end of mixing was determined by the pH of the water of the vase, which was 2.0 to 2.4.

2. Dehydration and heat the bitumen to a predetermined temperature (t° 140 to 150°C).

3. The components are mixed in a colloid mill Rincheval. In a colloidal mill Rincheval sequentially through the pipeline was desirables prepared aqueous phase of the emulsion, bitumen and latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64%.

Further, by combining the dispersion in the mill was preparing a bitumen emulsion.

Physical and mechanical properties of bitumen emulsions with different composition for roughened-surface treatment pavement are shown in table 3.

As can be seen from table 3, the inventive emulsion has high residual Vya is also high adhesion of the film binder with mineral materials (97-100% of the area). Moreover, the rate of coupling with acidic mineral material - granite - is equal to 100%, while in the closest analogue, the average is 82-100% of the area. While the rate of coupling with the transition to the main mineral materials such as hornblende, diorite, gabbrodiorite is 97-100% of the area, the closest analogue adhesion to core materials is missing.

Declare bitumen emulsion was tested on highways I-V categories. The emulsion was prepared in an industrial setting company “Rincheval” and was used for the rough-surface treatment (SPA). Technical characteristics of the emulsion are shown in table 4.

The predicted increase the durability of the road surface, subjected to rough-surface treatment using the inventive bitumen emulsion is 2-2,5 times.

The test results of the inventive bitumen emulsion on the wear resistance index wet abrasion samples of pavement with rough-surface processing, and visual inspection of the coating was subjected to ridout to increase the durability of the road surface using the claimed bitumen emulsion in 2-2,5 times.

Bitumen emulsion for road construction, including bitumen, hydrochloric or acetic acid, amine emulsifier in the form of a hydroxyl-containing aliphatic polyamine General formula

RCH(OH)CH2OTHER1NH2,

where R is an aliphatic radical WITH20-26or26-28;

R1- (CH2)6- or -(CH2CH2NHnCH2CH2-, where n = 1,2,

and water, characterized in that it additionally contains latex, which is a cationic aqueous dispersion based on styrene butadiene with a dry matter content of 64% in the following ratio, wt.%:

Bitumen 66-69

Hydrochloric or acetic acid 0,20-0,24

Amine emulsifier 0,3-3,0

Latex 2,0-6,0

Water The Rest



 

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FIELD: tire industry.

SUBSTANCE: pneumatic tire tread includes cross-linking rubber mix containing at least one elastomer copolymer of styrene and butadiene in emulsion and reinforcing material including prevailing white filler present in rubber mix in amount equal to or higher than 40 pce. Copolymer includes emulsifier in amount changing from 1 to 3.5 pce (mass parts per 100 parts of elastomer).

EFFECT: increased wear resistance of tire tread.

11 cl, 4 dwg

FIELD: tire industry.

SUBSTANCE: pneumatic tire tread includes cross-linking rubber mix containing at least one elastomer copolymer of styrene and butadiene in emulsion and reinforcing material including prevailing gas soot in mix in amount equal to or higher than 55 pce. Copolymer includes emulsifier in amount changing from 1 to 3.5 pce (mass parts per 100 parts of elastomer).

EFFECT: improved wear resistance of tire tread.

10 cl, 4 tbl

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