Block (co)polymer, block copolymer composition for asphalt modification, process for producing the same, and asphalt composition

A technology for block copolymer and asphalt modification, which is applied in the field of block (co)polymer, block copolymer composition for asphalt modification, its manufacture and asphalt composition, and can solve the increase of asphalt melt viscosity. , The block copolymer has reduced the solubility of asphalt, and has not been satisfied.

Inactive Publication Date: 2008-07-02
KRATON JSR ELASTOMERS KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, in this method, the solubility of the block copolymer to asphalt is significantly lowered, and the dissolution time becomes longer. In addition, the melt viscosity of the obtained asphalt is significantly increased, which causes a problem of impairing processability.
Therefore, even at present, the use of the above-mentioned SB block copolymer is also explored to modify asphalt, but no satisfactory results have been obtained. So far, it has not been found that it has good solubility in asphalt, tough viscosity of asphalt, softening point and Copolymer for modification with good elongation property balance, further improvement is desired

Method used

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  • Block (co)polymer, block copolymer composition for asphalt modification, process for producing the same, and asphalt composition
  • Block (co)polymer, block copolymer composition for asphalt modification, process for producing the same, and asphalt composition
  • Block (co)polymer, block copolymer composition for asphalt modification, process for producing the same, and asphalt composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Manufacture of block copolymer compositions

[0124] (1) (a) Polymerization of block (co)polymers

[0125] A stainless steel polymerization vessel with an internal volume of 100 liters equipped with a jacket and a stirrer was fully replaced with nitrogen, 20 kg of cyclohexane and 0.6 kg of styrene were added, and warm water was passed through the jacket to bring the contents to 40°C.

[0126] Then, 6 g of sec-butyl lithium was added to start polymerization. After the styrene polymerization was completed, 1.4 kg of 1,3-butadiene was slowly added while adjusting the temperature so that the temperature of the contents became 80°C.

[0127] After the polymerization of the B block was completed, 3 ml of methanol was added, and after stirring for 10 minutes, the liquid was transferred to a mixing vessel.

[0128] (2) (b) Polymerization of block copolymers

[0129] In the same manner as (1), after fully replacing the stainless steel polymerization vessel with an internal vo...

Embodiment 2、5～7、13、15、16、18、20、23、24

[0138] In addition to changing the addition of styrene, 1,3-butadiene, and sec-butyllithium, other block copolymers represented in Tables 1 and 2, and block copolymers for asphalt modification were obtained in the same manner as in Example 1. composition, manufacture bituminous composition, and evaluate the performance of the composition. Tables 1 and 2 show the evaluation results of each property.

Embodiment 3

[0140] (b) block copolymer, add 50kg hexanaphthene, 1.2g ethylene glycol diethyl ether, 1.2kg styrene in the same stainless steel polymerization container as embodiment 1, lead warm water to make content be 40 in the jacket °C, and then, 6 g of sec-butyllithium was added to start polymerization, and after styrene polymerization was completed, 5.6 kg of 1,3-butadiene was slowly added while passing cold water into the jacket to bring the contents to 80 °C. After the polymerization of the butadiene block was completed, 1.2 kg of styrene was added, and after the polymerization reaction was almost completely completed, 1 ml of methanol was added, stirred for 10 minutes, and then transferred to a mixing container. Then, after mixing the same block copolymer (a) as in Example 1 and the above-mentioned component (b), the same operation as in Example 1 was performed to evaluate the performance of the block copolymer composition. Table 1 shows the evaluation results of each characterist...

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Abstract

A composition for asphalt modification which comprises (a) a block (co)polymer represented by general formula (I); (S-B)m-S'n (in formula (I), S and S' are each a polymer block mainly composed of an aromatic vinyl compound, B is a polymer block mainly composed of a conjugated diene, and m and n are each an integer of 0 or 1, provided that m+n is 1 or more), wherein the total combined aromatic vinyl compound content in the block (co) polymer is from more than 10% by weight to 100% by weight, and (b) a block copolymer represented by general formula (II) ; S-B-S, general formula (III); S-B-S' and / or general formula (IV) ; (S-B)2-X (in formulas (II) to (IV), S, S' and B have the same meanings as given in general formula (I), and X is a residue of a coupling agent), at a block copolymer (a) / block copolymer (b) ratio (weight ratio) of 10-40 / 90-60; and further, an asphalt composition in which this composition for modification is added to asphalt. There are provided the composition for asphalt modification excellent in solubility in asphalt, excellent in storage stability at high temperatures, further low in melt viscosity and excellent in asphalt characteristics, and the asphalt composition available for road pavement or waterproof sheets.

Description

technical field [0001] The present invention relates to (1) an aromatic vinyl compound of a specific structure, or a block (co)polymer of the vinyl compound and a conjugated diene, and more specifically relates to a block (co)polymer for asphalt modification A suitable block (co)polymer used as a compatibilizer that can improve the solubility of straight-run asphalt or its composition, (2) a block (co)polymer containing the block (co)polymer and a block for bitumen modification A block copolymer composition for asphalt modification which is a copolymer having good solubility in straight-run asphalt, (3) a method for producing the composition, (4) the above-mentioned block copolymer for asphalt modification The composition blended in straight-run bitumen, or blended in straight-run asphalt, aromatic hydrocarbon resin and / or heavy oil, has good phase separation stability during storage (hereinafter referred to as storage stability), low viscosity and excellent processability. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08L95/00
Inventor 鸟居政俊加藤博铃木正人宫地巧
Owner KRATON JSR ELASTOMERS KK
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