Polyurethane elastic concrete and preparation method thereof

A polyurethane elastic and concrete technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of affecting driving comfort, poor high and low temperature resistance, insufficient waterproof ability, etc., to eliminate car jumping phenomenon, low porosity, and the effect of improving bulk performance

Active Publication Date: 2022-08-09
重庆市智翔铺道技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared elastomer composition has the characteristics of low viscosity, long operating time, high cohesiveness and not easy to foam; but it still has insufficient waterproof ability and poor high and low temperature resistance
In addition, when a car runs on conventional elastic concrete, it will generate noise to varying degrees, affecting driving comfort

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The multi-walled carbon nanotubes are acidified with mixed acid to carboxylate their surface end groups to obtain carboxylated multi-walled carbon nanotubes.

[0036] (2) Weigh 0.3 parts of carboxylated multi-walled carbon nanotubes, add 30 parts of diphenylmethane diisocyanate (MDI) and 57 parts of dehydrated polyether polyols successively, and ultrasonically disperse for 30 min while stirring under nitrogen protection, The temperature is heated to 80° C., and the reaction is continued for 4 hours to obtain a multi-walled carbon nanotube-polyisocyanate prepolymer composite component. After cooling, continue to add 13 parts of dibutyl phthalate (DBP), mix and stir evenly, that is, component A.

[0037] (3) Weigh 60 parts of dehydrated polyoxypropylene glycol, 0.3 part of carboxylated multi-walled carbon nanotubes and 3 drops of 4-dimethylaminopyridine, mix uniformly under nitrogen protection, and ultrasonically disperse for 30 minutes, then heat up to 65° C. , and ...

Embodiment 2

[0042] (1) using mixed acid to acidify graphene to carboxylate its surface end groups to obtain carboxylated graphene.

[0043] (2) take by weighing 0.2 parts of carboxylated graphene, add 38 parts of isophorone diisocyanate (IPDI) and 52 parts of dehydrated polyester polyols successively, ultrasonically disperse 30min while stirring under nitrogen protection, and heat up to 80° C., continue to react for 4 h to obtain the graphene-polyisocyanate prepolymer composite component. After cooling, continue to add 10 parts of dioctyl phthalate (DOP), mix and stir evenly, that is, component A.

[0044] (3) Weigh 75 parts of dehydrated polyoxypropylene glycol, 0.2 part of carboxylated graphene and 4 drops of 4-dimethylaminopyridine, mix them evenly under nitrogen protection, and ultrasonically disperse for 30min, heat up to 65°C, and react by reflux. 12h, the graphene-polyoxypropylene glycol composite component was obtained. Continue to add 10 parts of 3,3'-dichloro-4,4'-diaminodiphe...

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PUM

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Abstract

The invention relates to the field of road building materials, in particular to polyurethane elastic concrete which is prepared from raw materials including a carbon nanomaterial-polyisocyanate prepolymer composite component and a plasticizer. The carbon nanomaterial-polyisocyanate prepolymer composite component is prepared by mixing raw materials including a carbon nanomaterial, polyisocyanate and polyhydric alcohol. The invention further discloses a preparation method of the polyurethane elastic concrete. According to the polyurethane elastic concrete prepared by the method, a complex anchoring structure of a traditional expansion joint is omitted, the polyurethane elastic concrete is smoothly connected with a road surface, the bumping phenomenon is eliminated, and meanwhile driving noise is basically eliminated; the elastic concrete adopts dense gradation, is low in void ratio and free of water seepage, and has good waterproofness and durability.

Description

technical field [0001] The invention relates to the field of road building materials, in particular to a polyurethane elastic concrete and a preparation method thereof. Background technique [0002] Seamless expansion joints are usually made of elastic concrete. The high and low temperature performance, fatigue performance and resilience of asphalt elastic concrete are unsatisfactory. It is prone to rutting, cracking, peeling and other diseases during use, with poor durability and short service life. High temperature construction results in high carbon emissions; resin-elastic concrete is often difficult to take into account strength, deformation capacity and bonding performance at the same time, and its fatigue cracking resistance is insufficient, cracking diseases are prone to occur under heavy load, and its service life is far from expected. . [0003] CN 109251294 A discloses a polyurethane elastomer composition for concrete caulking and a preparation method thereof, wh...

Claims

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Application Information

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IPC IPC(8): C04B28/04C08G18/66C08G18/48C08G18/32C08G18/75C08G18/76C08K3/04
CPCC04B28/04C08G18/6685C08G18/4833C08G18/3808C08G18/7671C08G18/755C08K3/041C08K3/042C04B2201/50C04B2111/0075C08K2201/011C04B18/22C04B18/12C04B16/0683C04B14/02C04B14/022C04B14/026C04B24/26C04B24/42C04B24/045C04B2103/10Y02W30/91
Inventor 刘攀盛兴跃郝增恒李凯李璐全弘彬刘誉贵
Owner 重庆市智翔铺道技术工程有限公司
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