Polyurethane stock solution for cement baffle as well as preparation method and application of polyurethane stock solution

A polyurethane and baffle technology, which is applied to the polyurethane stock solution for cement baffles and its preparation and application fields, can solve the problems of low density of the rubber surface, affecting the next use, water slurry infiltrating into the baffles, etc. The effect of prolonging service life and reducing inner core density

Active Publication Date: 2018-07-06
ZHEJIANG HUAFON NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weight of a single piece of cement baffle made of rubber materials can reach 30KG, and the low density of the foam rubber surface will cause water slurry to seep into the baffle and affect the next use

Method used

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  • Polyurethane stock solution for cement baffle as well as preparation method and application of polyurethane stock solution
  • Polyurethane stock solution for cement baffle as well as preparation method and application of polyurethane stock solution
  • Polyurethane stock solution for cement baffle as well as preparation method and application of polyurethane stock solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Control the moisture content of polyether polyols, polymer polyols, chain extenders, catalysts, foam stabilizers, physical foaming agents, flame retardants and cell openers below 0.05%;

[0045] The polyoxypropylene diol (oxygen content is 15%, number-average molecular weight 5000) of the ethylene oxide capping of 60.0kg, the polymer polyol of 40.0kg (functionality is 3, and solid content is 30%, Hydroxyl value is 19mgKOH / g), 4.17kg of ethylene glycol, 0.83kg of 1,4-butanediol, the reaction product of 0.45kg of diethyl sulfate and triethylenediamine, 0.05kg of 70% bis(di Methylaminoethyl) ether solution, 0.5kg of organosilicon foam stabilizer, 10.0kg of pentafluoropropane (HFC-245fa), 0.10kg of water, 5.0kg of dimethyl phosphate, 1.0kg of ethylene oxide Alkane-terminated polyoxypropylene glycol (70% ethylene oxide content, 31 mgKOH / g hydroxyl value) was put into a reaction kettle, mixed at 35°C for 4 hours, discharged, and stored to obtain component A of polyurethane st...

Embodiment 2

[0050]Control the moisture content of polyether polyol, polymer polyol, chain extender, catalyst, foam stabilizer, physical foaming agent, flame retardant and cell opening agent to be controlled below 0.05%, and 90.0kg of ethylene oxide End-capped polyoxypropylene diol (ethylene oxide content is 20%, number average molecular weight 8000), 10.0kg polymer polyol (functionality is 3, solid content is 45%, hydroxyl value 25mgKOH / g), 13.33kg of ethylene glycol, 1.67kg of 1,4-butanediol, the reaction product of 1.67kg of diethyl sulfate and triethylenediamine, 0.33kg of 70% bis(dimethylaminoethyl) ether solution, 2.0kg of silicone foam stabilizer, 15.0kg of pentafluoropropane (HFC-245fa), 1.00kg of water, 10.0kg of dimethyl methyl phosphate, 3.0kg of ethylene oxide-capped polyoxypropylene glycol (The content of ethylene oxide is 70%, and the hydroxyl value is 35mgKOH / g) is put into the reaction kettle, mixed at 45° C. for 3 hours, discharged and stored to obtain component A of the p...

Embodiment 3

[0054] Control the moisture content of polyether polyol, polymer polyol, chain extender, catalyst, foam stabilizer, physical foaming agent, flame retardant and cell opening agent to be controlled below 0.05%, and 75.0kg of ethylene oxide End-capped polyoxypropylene diol (ethylene oxide content is 25%, number average molecular weight 6000), 25.0kg polymer polyol (functionality is 2, solid content is 30%, hydroxyl value 15mgKOH / g), 8.57kg of ethylene glycol, 1.43kg of 1,4-butanediol, the reaction product of 0.80kg of diethyl sulfate and triethylenediamine, 0.10kg of 70% bis(dimethylaminoethyl) ether solution, 1.0kg of silicone foam stabilizer, 12.0kg of pentafluoropropane (HFC-245fa), 0.50kg of water, 8.0kg of dimethyl phosphate, 2.0kg of ethylene oxide-capped polyoxypropylene glycol (The content of ethylene oxide is 80%, and the hydroxyl value is 31mgKOH / g) into the reaction kettle, after mixing at 45°C for 3 hours, discharge and store to obtain component A of the polyurethane ...

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Abstract

The invention discloses a polyurethane stock solution for a cement baffle as well as a preparation method and application of the polyurethane stock solution. The polyurethane stock solution for the cement baffle comprises a stock solution component A and a stock solution component B; the stock solution component A is prepared from raw materials including polyether polyol and polymer polyol, the polyether polyol ethylene oxide terminated polyoxypropylene glycol, and the polymer polyol is styrene-acrylonitrile grafted polyether polyol; and the stock solution component B is prepared from raw materials including diisocyanate and polyalcohol. The polyurethane stock solution has good plasticity, is capable of meeting different performance requirements in different fields by regulating the density, hardness and aperture and is used for pouring a cement layer on the inner wall of a tunnel if being produced into the cement baffle. The polyurethane cement baffle is produced in a process of one-step molding by molded foaming, is regular in shape, has lower overall density than a wood board, has elastic resilience and is capable of favorably wrapping reinforcing steel bars at a construction port, greatly shortening the operation time and effectively shortening the construction period in a construction process.

Description

technical field [0001] The invention relates to a polyurethane elastomer stock solution, a preparation method and application thereof. Background technique [0002] Domestic tunnel lining construction is mostly done by integral steel formwork trolleys. The inner contour size and surface smoothness of the tunnel have been effectively controlled. However, the end of the second lining of the trolley has not formed a fixed pattern. Wooden and steel molds are mainly used on site. Wooden formwork or steel formwork have problems such as inconvenient installation and disassembly, contradiction between steel bars and ends, inaccurate positioning of waterstops, and incomplete adhesion between end formwork and initial support surface. In the "Technical Guidelines for the Construction of Railway Tunnels on Passenger Dedicated Lines [TZ2014-2005]", the formwork trolley at the construction joint of the second lining concrete pouring section of Tuichenzi should be used as the end formwork ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/63C08G18/61C08G18/32C08J9/14C08J9/34C08K5/5333C08G101/00
CPCC08G18/3206C08G18/4277C08G18/4854C08G18/4883C08G18/61C08G18/632C08G18/6607C08G2101/00C08J9/146C08J9/34C08J2203/14C08J2375/04C08J2375/06C08J2375/08C08K5/5333
Inventor 陈俊赵叶宝叶其伟薛晓金帅丰平林孝宾
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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