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Water-insensitive polyurethane injecting paste material, and preparation method thereof

A grouting material and polyurethane technology, which is applied in the field of polyurethane semi-rigid foam to achieve the effects of high bonding performance, excellent volume stability and high expansion force

Active Publication Date: 2017-03-15
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a water-insensitive polyurethane grouting material and its preparation method to overcome the defects in the prior art and meet the needs of related fields

Method used

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  • Water-insensitive polyurethane injecting paste material, and preparation method thereof
  • Water-insensitive polyurethane injecting paste material, and preparation method thereof
  • Water-insensitive polyurethane injecting paste material, and preparation method thereof

Examples

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Effect test

Embodiment 1-10

[0036] In various embodiments, in the polyphenyl ring aromatic isocyanate:

Embodiment 1

[0037] Example 1: Polymethylene polyphenyl polyisocyanate (PAPI) is provided by Wanhua Company, and the product brand is PM200; in the polyol-modified diphenylmethane diisocyanate, the polyol is a 2-functionality polyether polyol, The molecular weight of PPG is 200;

Embodiment 2

[0038] Example 2: Polymethylene polyphenyl polyisocyanate (PAPI) is provided by Covestro, and the product brand is 44V20; in the polyol-modified diphenylmethane diisocyanate, the polyol is a difunctional polyether polyol , PPG molecular weight is 800;

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Abstract

The invention discloses a water-insensitive polyurethane injecting paste material, and a preparation method thereof. The water-insensitive polyurethane injecting paste material comprises a component A and a component B at a volume ratio of 1:1-1:1.2; the component A is a mixture of polyhydric alcohol-modified methylene diphenyl diisocyanate and polyaryl polymethylene isocyanate; and the component B is a mixture of a polyhydric alcohol, a plasticizer, a chain extender, a catalyst, a surfactant, and a foaming agent. According to the preparation method, the raw materials with excellent structures are selected, mixing of the raw materials at a certain ratio is carried out, and the water-insensitive polyurethane injecting paste material is provided with excellent water insensitivity because of physical and chemical synergistic effects of the raw materials, so that bearing capacity and durability of the water-insensitive polyurethane injecting paste material at a water-rich environment are improved greatly.

Description

technical field [0001] The invention relates to a polyurethane semi-rigid foam plastic, in particular to a polyurethane grouting material and a preparation method thereof. Background technique [0002] For some areas with weak foundations, if the buildings or roads are not considered in the design or construction stage or effective foundation treatment measures are not taken, large areas of land subsidence will easily occur after completion or during use. Buildings, roads or railways with concrete slab structures are often accompanied by large-area voids during the settlement process, which poses a very large safety hazard and may lead to serious collapse accidents. [0003] At present, there are many methods of foundation reinforcement treatment. Traditional excavation and reconstruction cause a great waste of resources, and often have poor durability, and settlement will still occur after reconstruction; grouting reinforcement is a method for weak foundations and foundatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G18/48C08G18/69C08G18/76C08G101/00
CPCC08G18/3206C08G18/42C08G18/4816C08G18/4829C08G18/6607C08G18/6611C08G18/6674C08G18/698C08G18/7664C08G18/7671C08G2110/0016
Inventor 韩文张天水朱彦王朝阳潘利军崔燕军唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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