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Liquid polyurethane rubber solidified quickly at ordinary temp for in-istu construction

A polyurethane rubber and rapid curing technology, applied in the field of polyurethane rubber, can solve the problems of laying that cannot be applied to the dam body, such as impact resistance and wear resistance, and achieve the effects of good sealing, easy construction and good oil resistance.

Inactive Publication Date: 2005-02-16
苏崇洲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The wear resistance of the existing polyurethane rubber is better than that of other natural and synthetic rubbers, but because they are all solid products, they cannot be applied to on-site construction environments such as the laying of dams against impact and wear, and the repair of water turbines against cavitation

Method used

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  • Liquid polyurethane rubber solidified quickly at ordinary temp for in-istu construction
  • Liquid polyurethane rubber solidified quickly at ordinary temp for in-istu construction
  • Liquid polyurethane rubber solidified quickly at ordinary temp for in-istu construction

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Embodiment Construction

[0009] Embodiments of the present invention are as follows: the production method of polyurethane prepolymer among the present invention is:

[0010] Put polyoxypropylene trihydric alcohol with a content of 60-80% by weight and toluene diisocyanate with a content of 20-40% by weight as raw materials, put them into a reactor, and heat the reactor to 80°C under normal pressure , prepolymerized for 4 hours, and lowered to room temperature to form a polyurethane prepolymer.

[0011] Its reaction formula is as follows:

[0012]

[0013] Before the reaction, the polyoxypropylene trihydric alcohol should be heated to 100°C in advance.

[0014] The production method of rubber coupling accelerator among the present invention is:

[0015] 3,3'-dichloro-4,4'-diaminodiphenylmethane with a content of 30-40% by weight, polyoxypropylene glycol and acrylic acid with a content of 60-70% by weight are The raw materials are put into the reactor, and under normal pressure, the reactor is he...

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Abstract

A liquid polyurethane rubber solidified quickly at ordinary temp for in-situ construction is prepared from the pre-polymer of polyurethane and cross-linking promoter of rubber through mixing in wt ratio of 1:(0.5-1). its advantages include quick solidification, high flowability, elasticity, toughness and resistance to oil, and strong adhesion.

Description

technical field [0001] The invention relates to a polyurethane rubber, in particular to a normal-temperature fast-curing liquid polyurethane rubber suitable for on-site construction. Background technique [0002] It is a very common problem that the dam discharge structures, sand washing gates, diversion culverts, water pipelines, etc. of the water conservancy project are eroded and worn by high-speed water flow during use. So far, there is no effective method at home and abroad. solution. People have tried to use cast stone slabs with high hardness to build masonry (including steel fiber concrete construction), but it ended up being prone to cavitation. The builders have also used high-grade (600#), or even impregnated concrete. Polymer concrete , epoxy resin mortar, etc., but this kind of rigidity can not achieve satisfactory results even under the impact of high-speed sandy water flow. In practice, people began to focus on using softness to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04
Inventor 苏崇洲
Owner 苏崇洲