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Block copolymer composition for asphalt modification, process for producing the same, and asphalt composition

A technology of block copolymer and asphalt modification, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the rotary shear load resistance (the twisting resistance cannot be said to have been fully improved, no asphalt dissolution has been found Solve problems such as resistance to torsion, road damage, etc., and achieve the effects of excellent torsion resistance, excellent performance balance, and excellent elongation

Inactive Publication Date: 2007-05-23
KRATON JSR ELASTOMERS KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon can cause damage to the pavement at intersections, especially rutting or scattering of aggregates on drainage pavements
However, the resistance to rotary shear load (torsion resistance) cannot be said to have been sufficiently improved, and has yet to be developed.
[0018] Therefore, the above-mentioned attempts to modify asphalt using SB block copolymers have not been able to obtain satisfactory results. The current situation is that it has not been found that the solubility of asphalt is excellent, and the toughness, elasticity, and softening point of asphalt have not been improved. Copolymer for modification with a good balance between elongation and elongation properties and excellent torsion resistance

Method used

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  • Block copolymer composition for asphalt modification, process for producing the same, and asphalt composition
  • Block copolymer composition for asphalt modification, process for producing the same, and asphalt composition

Examples

Experimental program
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Effect test

Embodiment 1

[0138] Preparation of Block Copolymer Compositions

[0139] (1) (i) Polymerization of block copolymers

[0140] For a stainless steel polymerization vessel with an internal volume of 100 liters equipped with a jacket and a stirrer, it was fully replaced with nitrogen, and then 50 kg of cyclohexane, 0.5 g of ethylene glycol diethyl ether, and 1.6 kg of styrene were added. Warm water was passed inside to make the content 40°C.

[0141] Then, 5.9 g of sec-butyllithium was added to initiate polymerization. After the polymerization of styrene was completed, 4.8 kg of 1,3-butadiene was slowly added while adjusting the temperature so that the temperature of the contents was 80°C. After the B block polymerization was completed, 1.6 kg of styrene was added and reacted for 30 minutes. After the reaction, 1 ml of methanol was added, and after stirring for 10 minutes, the liquid was transferred to a mixing container.

[0142] (2)(ii) Polymerization of block (co)polymers

[0143] As i...

Embodiment 2～6

[0151] Except changing the addition amount of styrene, 1,3-butadiene, sec-butyllithium, and ethylene glycol diethyl ether, in the same manner as in Example 1, the embeddings for asphalt modification shown in Table 1 were obtained. Segment copolymer composition, preparation of asphalt composition, and evaluation of its performance.

[0152] Table 1 lists the evaluation results for various characteristics.

Embodiment 7

[0154] (i) Block copolymers were prepared in the following manner. That is, in the same stainless steel polymerization vessel as in Example 1, 50 kg of cyclohexane, 2.0 g of ethylene glycol diethyl ether, and 0.96 kg of styrene were charged, and warm water was passed through the jacket to bring the contents to 40°C.

[0155] Then, 5.1 g of sec-butyllithium was added to initiate polymerization. After the polymerization of styrene was completed, 5.44 kg of 1,3-butadiene and 0.64 kg of styrene were slowly added while adjusting the temperature so that the temperature of the contents was 80°C. After the B block polymerization was completed, 0.96 kg of styrene was added and reacted for 30 minutes. After the reaction, 5 ml of methanol was added, and after stirring for 10 minutes, the liquid was transferred to a mixing container.

[0156] For (ii) block (co)polymer, except changing the addition amount of styrene, 1,3-butadiene, sec-butyllithium, ethylene glycol diethyl ether, in the...

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Abstract

A block copolymer composition for asphalt modification which is excellent in solubility in asphalt and high-temperature storage stability, has a low melt viscosity, and attains excellent asphalt properties, especially torsion resistance; and an asphalt composition. The block copolymer composition for asphalt modification comprises (i) a block copolymer comprising at least two polymer blocks formed mainly from an aromatic vinyl compound and at least one polymer block formed mainly from a conjugated diene and (ii) a block (co)polymer which comprises one or more aromatic vinyl polymer blocks as an essential component and optionally further contains one or more polymer blocks formed mainly from a conjugated diene and in which the peak molecular weight thereof in terms of standard polystyrene, as measured by gel permeation chromatography (GPC), is less than 1 / 3 the peak molecular weight of the block copolymer (i), the (i) / (ii) proportion being (95-70) / (5-30) (by weight). The asphalt composition is obtained by adding the modifying composition to asphalt.

Description

technical field [0001] The present invention relates to 1) a block copolymer for asphalt modification and an aromatic vinyl compound with a specific structure, or a block (co)polymer thereof with a conjugated diene, and more specifically relates to a block copolymer containing asphalt modification. A block copolymer composition for bitumen modification which is a block (co)polymer, has excellent solubility in straight-run bitumen and excellent twist resistance; 2) a method for producing the composition; The block copolymer composition for modification is blended into straight-run asphalt, or straight-run asphalt, aromatic hydrocarbon resin and / or heavy oil, which is excellent in phase separation stability during storage (hereinafter referred to as "storage stability"), Low viscosity, excellent processability and workability, excellent physical properties such as softening point, elongation, toughness and elasticity of straight-run asphalt, and an asphalt composition with excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L95/00
CPCC08L53/02C08L95/00C08L53/00C08L2666/24
Inventor 加藤博三浦史晃鸟居政俊宫地巧
Owner KRATON JSR ELASTOMERS KK
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