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Polyurethane high-temperature-resistant anti-rutting modifier for road asphalt

A technology of road asphalt and modifier, applied in building insulation materials, building components, buildings, etc., to achieve excellent anti-rutting performance

Active Publication Date: 2013-05-15
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the modifier can meet the asphalt paving requirements of roads under different external temperature environments, and prolong the service life of the road. At the same time, the addition process is simple, and the requirements for modification equipment are low, so as to overcome the defects of existing asphalt modifiers

Method used

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  • Polyurethane high-temperature-resistant anti-rutting modifier for road asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The formula of modifying agent of the present invention is as follows: 30wt% diphenylmethane diisocyanate (MDI-100, NCO content 33.6%, Yantai Wanhua Polyurethane Co., Ltd.), 55wt% number average molecular weight is the polyoxypropylene diisocyanate of 2000 Amine (D-2000, Huntsman company), 3wt% 1,4 butanediol, 5wt% number average molecular weight is the liquid polybutadiene (LBR, Kuraray company) of 30000, the bismuth isooctanoate of 0.5wt% , 0.5wt% dewatering agent Zoldine MS-Plus (oxazolidines, Angus company), 1wt% antioxidant 2,6-di-tert-butyl-4-methylphenol, 4wt% plasticizer ortho Dioctyl phthalate, 1 wt% antihydrolysis agent bis(2,6-diisopropyl)carbodiimide. The amount of free NCO groups in diphenylmethane diisocyanate is in excess of 36% relative to the sum of the amount of active hydrogen contained in the amino groups of D-2000 and the hydroxyl groups in 1,4-butanediol. The substances in the modifier formula are added in proportion to No. 70 straight-run road as...

Embodiment 2

[0039] The formula of modifier of the present invention is as follows: 60wt% polymethylene polyphenyl polyisocyanate (PM-200, NCO content 31.2%, Yantai Wanhua Polyurethane Co., Ltd.), 15wt% functionality is 3, several Polyoxypropylene triamine (T-3000, Huntsman company) that average molecular weight is 3000, 5wt%, functionality is 2, the polycarbonate polyol (CD210 that number average molecular weight is 1000, Japanese Daicel Chemical Industry Co., Ltd. ), 5wt% trimethylolpropane, 5wt% 4,4'-diaminodiphenylmethane (MDA, Yantai Wanhua Polyurethane Co., Ltd.), 5wt% number average molecular weight is 4000 hydroxyl-terminated polybutylene Alkene (HTPB, Qilong Chemical Co., Ltd.), 0.5wt% dibutyltin dilaurate, 0.5wt% N, N-dimethylethanolamine, 0.5wt% dewatering agent pTSI (oxazolidines, Bayer company) , 1wt% antioxidant 1035, 0.5wt% antioxidant 1076, 1wt% plasticizer dioctyl sebacate, 1wt% antihydrolysis agent phenyl glycidyl ether. The amount of free NCO groups in polymethylene pol...

Embodiment 3

[0041] The formula of modifier of the present invention is as follows: the liquefied MDI of 45wt% (MP-35, NCO content 27.5%, Yantai Wanhua Polyurethane Co., Ltd.), 35wt%, functionality is 2, and number-average molecular weight is 1000 hexadiene Acid-based polyester polyol (PEA-1000, Yantai Synthetic Leather Factory), 3wt% adipic acid, 2wt% 1,6 hexanediol, 5wt% number average molecular weight is 10000 polybutadiene-styrene copolymer (LIR, Kuraray company), 0.5wt% dibutyltin dilaurate, 0.5wt% tetramethylammonium chloride, 0.5wt% dewatering agent Zoldine MS-Plus (oxazolidines, Angus company), 1wt% Antioxidant 1035, 3 wt% plasticizer dioctyl phthalate, 3.5 wt% dioctyl sebacate, 1 wt% UV absorber Tinuvin 101 (Ciba Specialty Chemicals). The amount of free NCO groups in the liquefied MDI is 103% greater than the sum of active hydrogens contained in the hydroxyl groups in PEA-1000 and 1,6 hexanediol and the carboxyl groups in adipic acid. The substances in the modifier formula are ad...

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Abstract

The invention discloses a polyurethane high-temperature-resistant anti-rutting modifier for road asphalt. The modifier comprises the following components in parts by the total weight of the modifier: 25-65 parts of one or two or more of diisocyanate, polyaryl polymethylene isocyanate and diisocyanate derivatives, 15-60 parts of one or two or more of polymer polyol and polymer polyamine, 2-15 parts of one or two or more of micromolecular polyol chain extender, micromolecular polyamine chain extender and micromolecular polyatomic acid chain extender, 0.01-3 parts of organic polyurethane catalyst, and 0-45 parts of poly-alkadiene polymer compound with a number-average molecular weight of 500-50000. The modifier can greatly improve the high-temperature resistance and anti-rutting properties of matrix asphalt and modified asphalt; and prepared modified asphalt is balanced in high and low-temperature performances, good in compatibility with matrix asphalt, and stored stably.

Description

technical field [0001] The method relates to a modifier for road asphalt, in particular to a polyurethane type high-temperature anti-rutting modifier for road asphalt. Background technique [0002] Asphalt pavement rutting is one of the main highway diseases in our country. It is a shape formed on the asphalt pavement along the direction of vehicle travel due to the large permanent deformation of the carriageway at the driving track under the repeated action of the vehicle load on the asphalt pavement. Pavement damage similar to grooves. Rutting generally occurs in seasons with high temperatures, and the asphalt pavement is gradually deformed and viscous flow is gradually formed under the repeated rolling of vehicles. It usually occurs lateral uplift along with the compression subsidence of the asphalt pavement. The appearance of ruts has seriously affected the service life and service quality of the road surface, and brought many hazards to road users: such as affecting t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L75/14C08G18/69C08G18/66C08G18/65
Inventor 张昊涂松盛基泰吴士超孙家宽华卫琦廖增泰丁建生
Owner WANHUA CHEM GRP CO LTD
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