section Home
Production, Amateur
Radio amateur
Model aircraft, rocket-
Useful, entertaining 		Stealth master
Electronics
Physics
Technologies
invention 		space Mystery
Earth Mysteries
Secrets of the Ocean
Stealth
section Map
Start
Forum
Use of material is permitted for reference (for websites - hyperlinks)
INVENTION
Russian Federation Patent RU2226203

BITUMEN COMPOSITION

BITUMEN COMPOSITION

Name of the inventor: Glukhov VS .; Gems AR .; VF Stepanov .; Sitnikov VV .; Brekhov PP .; Nechinenny VA .; Dubina SI .; Yakimova LA .; Yakovleva TA
The name of the patentee: Closed Joint Stock Company "Tekhprogress"
Address for correspondence: 109147, Moscow, ul. Vorontsovskaya, 23, CJSC "Tekhprogress" gene. Director V.F.Stepanovu
Starting date of the patent: 2001.12.24

The invention relates to the production of bituminous compositions comprising a polymeric additive used in road construction, for producing roofing, waterproofing materials and sealants. The bitumen composition comprises a bitumen-block copolymer of styrene and butadiene with adhesive additive - low molecular weight maleated polybutadiene having a content of bound maleic anhydride is 12-21 wt%, having a dynamic viscosity at 25C of 10-100 Pa · s, and has the following composition, in parts by weight. .: 81,0-97,5 asphalt, block copolymer of butadiene with styrene 2,0-14,0, said adhesive additive of 0.5-5.0. The bituminous composition may further comprise a polyethylene polyamine or triethanolamine in an amount of 0.25-2.0 parts by weight 1 pbw said adhesion additive. The invention allows to maintain high adhesive properties of the bitumen composition at low doses to increase adhesion additives of physico-mechanical characteristics of the bitumen composition and to extend the range and applied adhesive additives.

DESCRIPTION OF THE INVENTION

The invention relates to preparation of bitumen compositions containing polymer additives, in particular - a block copolymer (thermoplastic elastomer) used in road construction, for producing roofing, waterproofing materials and sealants.

Known composition for roofing and waterproofing materials, including polymer additives as a mixture of 0.5-10.0 wt.% Of a linear block copolymer AB, 2.0-5.0 wt.% Of a linear block copolymer ABA, 65,0- . 95.0% by weight radial block copolymer (AB) 4 X, wherein a - a polystyrene block molecular weight of 10,000-30,000, B - polybutadiene block having a molecular weight, X - polyfunctional crosslinking agent, and 2,0-20,0 wt% polystyrene having a molecular weight of 10,000-30,000, unoxidized bitumen, filler and reclaimed tire or polybutadiene in a ratio of components in the composition, in weight%..:

Said mixture of block copolymers of polystyrene and 7-12

Unoxidized bitumen 58-73

filler 10-12

Tyre reclaimed or polybutadiene 5-15

Moreover, for preparing a composition in a mixer with heating and stirring at a temperature of 130 ± 20 ° C was charged with said polymeric additive and reclaimed tire filler (talc) are mixed for 15 minutes, then fed unoxidized portions bitumen, heated to a temperature 150-170ºS and are mixed for 45-75 minutes until a homogeneous mass (patent number 1,807,999 of the USSR, IPC C 08 L 95/00, C 08 K 7/00 // C 08 L 95/00, 9:00, 25:06, 53 00, the priority of 11.29.90, published on 07/04/93, at number 13, BI).

The known solution allows to increase the elongation at break and strength-to-metal fastening material based on the composition, but also reduce its cooking temperature.

The disadvantage of this invention is a multicomponent polymer base composition multistage its production method, its preparation technology complication by requiring preheating bitumen and polymeric additives to fairly high temperatures, and the need to apply it in the molten state.

Known bituminous composition comprising 80-99 parts by weight bitumen, 1-20 parts by weight rubber (conjugated diene homopolymers, statistical copolymers of styrene and conjugated diene linear or branched block copolymers of styrene-conjugated diene, preferably a linear or branched block copolymer of styrene-butadiene), 1-20 parts by weight mixtures of sulfur and sulfur-containing compounds in a weight ratio of 20-60: 40-80, respectively, which is obtained by mixing at temperatures within 150-170ºS 1.5-2.0 h bitumen and rubber (predominantly a block copolymer of styrene-conjugated diene), then injected a mixture of sulfur and sulfur-containing compounds and optionally further - amine additive soluble in the bitumen (triethanolamine), and lead peremeshevanie for 1.5-4.0 h (RF patent number 2011166, IPC C 08 L 95/00, C 08 K 13/02, priority of 07.12.90, publ. 30.04.94, at number 8 BI).

Combined use of bitumen used in known compositions and amine-containing cure system additives significantly improves resistance of asphalt binder material to cracking.

A disadvantage of the known composition is the duration of its preparation, necessity of using a sulfuric vulcanizing system comprising a mixture of elemental sulfur and sulfur-containing compounds, the preparation of which is allocated a separate step, the possibility of an uncontrolled increase in viscosity of the bitumen composition during storage due to the occurrence in time of vulcanization processes.

Known and bituminous composition for waterproofing and sealing, comprising 70-79 wt.% Of bitumen, 9,5-15 wt.% Styrene-butadiene thermoplastic elastomer DST-30 or rubber crumb (waste production of synthetic rubber and styrene butadiene latexes), 1,0-3, 0 wt.% low molecular weight copolymer of butadiene with acrylonitrile or piperylenes, 8.0-10.0 wt.% of plasticizer (naphthenoaromatic hydrocarbons), 0.5-1.0 wt.% of stearic acid, 1.5-3.0 wt. % surfactant (OP 7 and OP-10), which is obtained by mixing 1.5-2.0 parts for components, or in the mixer, which serves to 160-170ºS heated bitumen, and then it is introduced in portions of thermoplastic elastomer ( or rubber crumb), and stearic acid, stirred until homogeneous macsy then sequentially introduced into the low molecular weight copolymer, a plasticizer and a surfactant, either in two stages: in a first step, the concentrate by mixing in a vacuum mixer for 1 hour at 70 ° C parts asphalt with all the other components in the second stage is introduced into a mixer heated to the remainder of the bitumen 160-170ºS administered concentrate obtained in the first step, and conduct stirring at 150-170ºS for 1.5-2.0 hours, and the ratio bitumen, entered in the first and second stages is 1: 1,41-2,95, respectively (RF patent number 2011667, IPC C 08 L 95/00, C 08 K 5/00, priority of 09.01.91, published. 04/30/94, at Byul.№8).

Known bituminous composition has a high frost resistance, strength, low elongation at break at positive temperatures.

The disadvantage is its multi-component, calibration using a low molecular weight copolymer of butadiene and acrylonitrile (NAC), which is safe environmentally, since prolonged exposure to high temperatures by dissolving the copolymer in the bitumen can be released UNCURED residual monomer (NAC) in the environment.

Known polymer-bitumen waterproofing mastic, comprising 72-85% by weight nizkomarochnogo bitumen, 5-8% by weight of styrene-butadiene thermoplastic elastomer DST-30 and 10-20% by weight of a fine particulate filler - hemihydrate phosphogypsum, which is obtained as follows:... In Turbomixers serves bitumen , it is heated to a temperature 160-180ºS is introduced under constant stirring in a portion of the filler bitumen filler ratio of 1: 0.028 and stirred for 10-20 minutes, then the resulting mixture is introduced into the first portion of thermoplastic DST-30 to obtain a mixture with a ratio of bitumen: TPE : filler 1: 0.002: 0.028, and then 5-10 min charged in equal parts to the remainder of the thermoplastic obtain a mixture with a ratio of bitumen: TPE: 1 excipient: 0,058-0,110: 0.028, the mixture was stirred for 40-60 minutes, after then the remaining quantity of filler introduced for 4-8 minutes, then the final mixing is carried out for 10-30 minutes until complete homogenization of the composition (Russian patent № 2016019, IPC C 08 L 95/00, C 08 K 3/24 08 // C L 95/00, 53:02, priority of 01.31.92, published. 15.07.94 city).

The disadvantages of the prior art and is a multistage process duration, but also inconvenient for transportation, storage and later discharge form - at ambient temperature the composition is a nebriketirovannuyu mass.

The closest the technical essence and achieved result is the proposed bituminous composition comprising bitumen, styrene-butadiene thermoplastic elastomer, and an adhesive additive, which is used as a tall oil or the reaction product of tall oil and triethanolamine in a weight ratio of tallow: triethanolamine (66-68) :( 32-34), with the following ratio in the composition komponenotov wt.%: 97,3-77 bitumen, styrene-butadiene thermoplastic elastomer 2-16, said adhesive additives 0,7-7,0 (RF patent number 2,119,513 C 08 95 L / 00, publ. 27.09.98, at number 27, BI).

The disadvantages of the known composition are:

indefinite composition of tall oil, depending on the type of raw natural source (coniferous or deciduous species of wood), and technologies for substantially changing the content of the resin acids are determined mainly by the adhesive properties of tall oil;

insufficiently effective mixing tall oil or the reaction product of triethanolamine and tall oil with a thermoplastic elastomer, which can lead to disruption in the preparation of dosage component polymer-bitumen composition;

the need for the introduction of the preheating stage adgezioonoy used additives, which leads to additional consumption of steam or electricity.

An object of the present invention to reduce the dosages of adhesion additives while maintaining high adhesive properties of the bitumen composition, enhancing its physical and mechanical characteristics, expanding the range of use of adhesion additives.

As used in the present invention, the low molecular weight maleated polybutadiene of chemically similar thermoplastic polybutadiene block, which contributes to an effective combination of these polymers and introduction of MALA groups directly into the polymer chain tarmoelastoplasta, reinforcing effect as a bitumen modifier latter.

The stated technical problem is solved in that the bituminous composition comprises bitumen, styrene-butadiene block copolymer and the adhesive additive - low molecular weight maleated polybutadiene with a content of bound maleic adgidrida 12-21 wt%, having a dynamic viscosity of 10-100 Pa.s at a temperature of 25 ° C, with the following. ratio, wt.%

Bitumen 97,5-81,0

Styrene-butadiene block copolymer 2,0-14,0

Said adhesive additive 0.5-5.0

The stated technical problem is solved by the fact that the bituminous composition further comprises an organic nitrogen-containing compound to a tertiary nitrogen atom, selected from the group of triethanolamine, polyethylenepolyamine weight ratio in said adhesion additive: nitrogen-containing compound of 1.0: 0.25-2.0.

It is known the use of maleic anhydride for modification of unsaturated petroleum resin, which is used as an emulsifier in the preparation of an aqueous dispersion of tire rubber, which is part of the bituminous mixture (AS USSR № 975646, MKI C 04 B 13/30, publ. 23.11.82 g ., № BI 43), but the use of maleic andgidrida or maleated polymers as additives polimernobitumnyh adhesive mixtures known from the literature.

The invention is confirmed by specific examples. In carrying out the invention is used: as a styrene-butadiene block copolymer - butadiene thermoplastic linear structure DST-30-01 TU 38.103267-99, styrene-butadiene thermoplastic branched structure DST-30R-01 TU 38.40327-98; triethanolamine TU 6-04-573445-90; polyethylene polyamine according to TU 6-02-594-85.

Used as an adhesion additive malenizirovanny low molecular weight polybutadiene prepared PBNM method described in Russian patent 2153508 №.

Physical and mechanical properties of polymer-bitumen composition is determined by the following methods:

Determination of needle penetration depth - according to GOST 11501-78;

Determination of softening temperature ring and ball - according to GOST 11506-73;

Determination of the brittleness temperature by Fraasu - according to GOST 11507-78;

Determination of tensile - according to GOST 11505-75;

Determination of elasticity - OST 218.010-98;

Determination of the adhesion properties of linkage with marble or sand in accordance with GOST 11508-74.

Data on the composition of polymer-bitumen compositions shown in Table 1, the properties - in Table 2.

Example 1 In an internal mixer was charged thermoplastic linear structure DST-30R-01 in the form of chips in an amount of 2.0 kg, low molecular weight maleated polybutadiene in an amount of 0.5 kg containing 12 wt.% Of bound maleic anhydride and having a dynamic viscosity 10 Pa.s . Blending polymers is carried out for 15-20 min at ambient temperature.

The resulting mixture was a particulate aggregate in an amount of 2.5 kg is fed into a vessel equipped with a paddle stirrer and a circulation pump, with 97.5 kg of petroleum bitumen, heated to 140-160ºS temperature and stirring are 150-160ºS temperature for 60 min until complete dissolution of the polymer. Sample bitumen composition obtained was subjected to standard tests.

Example 2. In vessel equipped with a paddle stirrer, and circulating pump is charged with 81.0 kg of oil bitumen, heated to 140-160ºS charged sequentially 14kg thermoplastic branched structure DST-30R-01 in the form of bulk powder with a size of less than 2 parts, 5 mm and 5 kg of low molecular weight maleated polybutadiene with PBN-M bound maleic anhydride content of 21% and having a dynamic viscosity at 25C of 100 Pas. Stirring lead 60 minutes at 150-160ºS until complete dissolution of the polymer. Sample test bituminous composition obtained by standard methods.

Example 3 In a mixer equipped with a blade stirrer, 17.5 kg of a 20% solution of thermoplastic linear structure DST-30-01 in a mixed solvent (ratio of cyclohexane: nefras = 70:30 wt.%) And 1.5 kg of low molecular weight maleated polybutadiene PBN-M, containing 17 wt.% of bound maleic anhydride and having a dynamic viscosity of 50 Pa · s. Mixing lead over 20-30 min at ambient temperature. Then the resulting mixture was isolated by aqueous polymer degassing and dried in an air dryer.

The resulting polymer blend flowable powder in an amount of 5 kg is fed into a container with 95 kg of petroleum bitumen, heated to a temperature 140-160ºS and lead 150-160ºS stirring at for 60 minutes until complete dissolution. Formulation Sample tested by standard techniques.

Bitumen composition Example 4 was prepared as in Example 1, but additionally administered in 1 kg of bitumen, triethanolamine (TEA). The weight ratio of PBN-M: TEA = 1: 2.

EXAMPLE 5 Bitumen composition was prepared as in Example 2, but additionally administered in bitumen polyethylene polyamine (PEPA) in an amount of 1.25 kg. The weight ratio of PBN-M: PEPA = 1: 0.25.

Bitumen composition Example 6 was prepared as in Example 3, but additionally added to the bitumen in an amount Triethanolamine 1.5 kg. The weight ratio of PBN-M: TEA = 1: 1.

Example 7. (prototype).

In a mixer equipped with a blade stirrer, 2 kg of a thermoplastic elastomer DST-30R-branched structure 01 in the form of powder with particle size of less than 2.3 mm, and 0.7 kg 40-50ºS heated to the temperature of the "TTS", prepared by reacting tallow with triethanolamine. Stirring lead 15 minutes. The resulting filled TPE DST-30R-01 TM flowable powder is fed into the tank with the oil road bitumen, taken in the amount of 97.3 kg, and warmed to a temperature 140-160ºS. Stirring was conducted for 20 minutes to completely dissolve the polymer. A sample of bituminous composition was analyzed by standard methods.

As shown in Table 2, samples of polymer-bitumen compositions have high adhesive properties - bitumen film is maintained at 100% of the surface of the mineral filler in the boundary dosages adhesive additive is lower than the prototype. Indicators extensibility and elasticity of the softening point ring and ball polymer-bitumen compositions obtained according to the claimed technical solution are higher than those for the compositions produced by a known method. The highest values ​​of these indicators are polymer-bitumen composition containing maleated polybutadiene and nitrogen-containing compound. Reactions between the last interaction provide enhanced flexibility and temperature resistance of the mixture.

Thus, the proposed technical solution expands the range of adhesive additives for polymer-bitumen compositions, allows for multiple reduce the dosage of the adhesive additive and a polymer-bitumen compositions with high physical and mechanical properties, and formulation technology is simple and involves any convenient manufacturer options blending components without deterioration composition.

CLAIM

1. Bitumen composition comprising a bitumen, a block copolymer of butadiene with styrene and an additive adhesive, wherein as adhesive additive composition comprises a low molecular weight maleated polybutadiene with the maleated anhydride content related 12-21 wt.%, Having a dynamic viscosity at 25 ° C 10 100 Pa · s, in the following ratio, mass parts .:

Bitumen 81.0 - 97.5

The block copolymer of butadiene with styrene 2,0 - 14,0

Said adhesive additive 0.5 - 5.0

2. Bituminous composition according to claim 1, characterized in that it further comprises an organic nitrogen-containing compound to a tertiary nitrogen atom, selected from the group of triethanolamine, polyethylene polyamine, in a weight ratio of said adhesion additive: nitrogen-containing compound of 1: 0.25 - 2.00, respectively, .

print version
Publication date 18.01.2007gg