Composition of PMB polymer modified bitumen
Composition of polymer modified bitumen is bitumen plus polymer and a compatibilizing agent prepared by reacting one or more unsaturated monomers with a bituminous composition comprising asphaltenes or resins.
Asphaltenes and resins are two of four broad component groups found in bitumen (the others are aromatics and saturates; resins, aromatics and saturates are collectively known as maltenes) . Asphaltenes are n- heptane insoluble black or brown amorphous solids, and are generally considered to be highly polar and complex aromatic materials of fairly high molecular weight. Resins are soluble in n-heptane and are typically dark brown in colour, solid or semi-solid and polar. In one embodiment of the invention, the bituminous composition comprising asphaltenes and/or resins is a bituminous composition comprising all four components, i.e. resins, aromatics, saturates and asphaltenes.
Composition of PMB
In another embodiment of the invention, the bituminous composition comprising asphaltenes and/or resins is a composition consisting solely of asphaltenes, a composition consisting of solely of asphaltenes and resins, or a composition consisting solely of resins. It is believed that the reaction provides "surfactant" type structures wherein a short polymerchain is chemically bonded to an asphaltene or a resin. It is thought that the surfactant structure consists of a bitumen-like moiety and a polymer-like moiety, and can therefore improve the interaction between the bitumen and the polymer in the polymer-modified bitumen. The polymer-modified bitumen compositions of the invention are essentially physical blends of bitumen, polymer and compatibilising agent wherein the compatibilising agent improves the interaction between the bitumenand the polymer. The compatibilising agent helps to avoid phase separation in the bitumen composition, and allows the use of smaller quantities of polymer to achieve desirable physical properties. Additionally the compatibilising agent may improve the rheological properties of the bitumen composition.
Process for preparing of PMB polymer modified bitumen
Process for preparing a PMB polymer modified bitumin binder composition in the substantial absence of crosslinking agents by heating a bitumen component in a stirred tank to a temperature from 185° C. to 221° C.; adding a block copolymer composition to the bitumen component while the bitumen component is being stirred to form a homogeneous mixture of the bitumen component and the block copolymer composition; and continuing to stir the homogeneous mixture while maintaining the temperature from 185° C. to 221° C. for a period of time from 4 hours to 30 hours thereby forming a cured polymer modified bitumin binder composition.
Polymers in PMB modified bitumen
The block copolymer composition utilized in the process comprises a diblock copolymer comprising one block of a Monovinyl aromatic hydrocarbon and one block of a conjugated diene having a peak molecular weight from 30,000 to 78,000 and a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, and optionally one or more block copolymers comprising at least two blocks of monovinylaromatic hydrocarbon and at least one block of conjugated diene, the block copolymer selected from linear triblock copolymers having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, multiarm coupled block copolymers having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof, wherein each block copolymer has a vinyl content from 35 to 80 mol percent based on the number of repeat monomer units in the conjugated diene block, wherein when both (i) and (ii) are present in the block copolymer composition, the ratio of (i) to (ii) is greater than 1:1.
POLYMER-MODIFIED BITUMEN (PMB)
Product delivery options:
- in hot form by specialized bitumen tanker trucks delivery radius is up to 2000 km.
- in solid form in the package (net weight per package is 1000 +/- 60 kg) (the distance of transportation is not limited)
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Polymer Modified Bitumen |
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STANDARD |
EN 14023-2010 (EUROPE) |
DNIT 129/2011-EM (Latin America) |
GOST 52056-2003 (RUSSIA) |
GOST 58400.1-2019 (RUSSIA) |
STO Avtodor 2.30-2016 (RUSSIA) |
IS 15462 – 2004 |
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Polymer-modified bitumen |
PmB 10/40-65 PmB 25/55-60 PmB 25/55-65 PmB 45/80-55 PmB 45/80-60 PmB 45/80-65 PmB 45/80-75 PmB 65/105-60 PmB 65/105-75 |
55/75-E 60/85-E 65/90-E |
ПБВ 40 ПБВ 60 ПБВ 90 ПБВ 130 ПБВ 200 ПБВ 300 |
PG 52-46 PG 58-22 PG 58-28 PG 58-34 PG 58-40 PG 64-22 PG 64-28 PG 64-34 PG 64-40 PG 70-22 PG 70-28 PG 70-34 PG 70-40 PG 76-22 PG 76-28 PG 76-34 PG 76-40 PG 82-16 PG 82-22 PG 82-28 PG 82-34 |
ПМБ 35/50 ПМБ 50/70 ПМБ 70/100 ПМБ 100/130
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PMB–P–120 PMB–P–70 PMB–P–40 PMB–E–120 PMB–E–70 PMB–E–40 |
We produce PmB of any type according to your specification
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POLYMER MODIFIED BITUMEN SPECIFICATION |
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Characteristic |
CODE |
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PMB 10/40-65 |
PMB 25/55-65 |
PMB 50/90-55 |
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Penetration at 25°C, 0.1 mm, 100g, 5s. |
10-40 |
25-55 |
50-90 |
IS 15462 – 2004 |
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Softening Point, (R&B), °C, Min. |
65 |
60 |
55 |
IS 15462 – 2004 |
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Fraass breaking point, °C, Max. |
-10 |
-10 |
-10 |
IS 15462 – 2004 |
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Flash point, COC, °C, Min. |
220 |
220 |
220 |
IS 15462 – 2004 |
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Elastic recovery of half thread in ductilometer at 15°C, % Min. |
50 |
40 |
30 |
IS 15462 – 2004 |
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Separation, difference in softning point, R&B, °C, Max. |
3 |
3 |
3 |
IS 15462 – 2004 |
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Viscosity at 150°C, Poise. |
1 to 3 |
2 to 6 |
3 to 9 |
IS 15462 – 2004 |
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Thin film oven tests and test on residue. |
– |
– |
– |
IS 15462 – 2004 |
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(a) Loss in mass, %, Max. |
1.0 |
1.0 |
1.0 |
IS 15462 – 2004 |
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(b) Increasing in softning point, °C, Max. |
7 |
6 |
5 |
IS 15462 – 2004 |
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(c) Reduction in penetration of residue at 25°C, % Max. |
35 |
35 |
35 |
IS 15462 – 2004 |
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(d) Elastic recovery of half thread in ductilometer at 25°C, % Min. |
35 |
35 |
35 |
IS 15462 – 2004 |
