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Normal-temperature cured polyurethane resin composition and preparation method thereof

A polyurethane resin, room temperature curing technology, applied in the field of polyurethane resin, can solve the problems that the resin cannot be used at low temperature, is not suitable for use on site, and the amount of plasticizer added is too large, so as to achieve easy and uniform mixing, simple and reliable preparation process, Easy-to-operate effects

Inactive Publication Date: 2017-05-10
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, those skilled in the art have carried out a large amount of researches on this, Chinese invention patent specification CN101544740A discloses a kind of casting type normal temperature curing polyurethane resin composition and its preparation method, Chinese invention patent specification CN 102250310 B discloses a polyurethane Resin composition and its preparation method and application. The preparation process of the above two patents is cumbersome, and prepolymers need to be synthesized. The prepolymers have a limited storage period and high viscosity. A large amount of plasticizers need to be added to adjust the viscosity. Chinese invention Patent specification CN 100523084 C provides a polyurethane resin composition, its preparation method and its use as a filling material for railway slab-type ballastless track convex abutment. The disadvantage is that the prepared resin cannot be used at low temperature , and need to add organometallic catalysts, which is more harmful to the environment; Chinese invention patent specification CN 101613453 B provides a resin composition for filling the convex block of the unit plate ballastless track, although it can be used at low temperature, but adding The amount of plastic is too large, and an organometallic catalyst must be added, which is seriously harmful to the environment, and the catalyst must be packaged separately and added at the time of use. It is not suitable for on-site use, and it must o C~40 o Construction within the scope of C

Method used

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  • Normal-temperature cured polyurethane resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 80Kg of HTPB with a hydroxyl value of 0.5±0.05mmol / g, 10Kg of rigid foam polyether with a hydroxyl value of 11±0.6mmol / g, 10Kg of PTMG with a hydroxyl value of 3.1±0.05mmol / g, 7Kg of 550 carbon black and 3Kg Put the DOP into a grinder for grinding. After the grinding is completed, put the material into a 200L reactor with a dispersing device, stir, and slowly heat up to 50~55 o C, add 4Kg of calcium sulfate whiskers with an aspect ratio of 75 and 30Kg of 600-mesh silicon micropowder, start the disperser to disperse for 1 hour (keep the material temperature not exceeding 90 during the dispersing process) o C), stop dispersing, heat up to 110~120 o C reduced pressure to 10~20mmHg for dehydration, after dehydration for two hours, lower the temperature to 50 o Below C, add 0.4Kg of BYK-051, 0.5Kg of DISPERBYK-2000, 0.6Kg of BYK-373 and 0.3Kg of N-β(aminoethyl)-γ-aminopropyltrimethoxysilane, 0.4Kg of 264 and 0.1Kg of 168, stirred for 2 hours, discharged, sealed and package...

Embodiment 2

[0036] 550 carbon black and Put 4Kg of DOS into a grinder for grinding. After the grinding is completed, put the material into a 200L reactor with a dispersing device, stir, and slowly heat up to 50~55 o C, add 5Kg of calcium sulfate whiskers with an aspect ratio of 80 and 28Kg of 800-mesh silicon micropowder, start the disperser to disperse for 1 hour (keep the material temperature not exceeding 90 during the dispersion process) o C), stop dispersing, heat up to 110~120 o C reduced pressure to 10~20mmHg for dehydration, after dehydration for two hours, lower the temperature to 50 o Below C, add 0.6Kg of BYK-051, 0.5Kg of DISPERBYK-2000, 0.75Kg of BYK-373 and 0.5Kg of N-β(aminoethyl)-γ-aminopropyltrimethoxysilane, 0.3Kg of 264 and 0.2Kg of 168, stirred for 2 hours, discharged, sealed and packaged as component A.

[0037] Add 95Kg of PAPI and 5Kg of DOP into a 200L reactor, stir at room temperature for 2 hours, discharge, seal and package as component B.

[0038] Fully mix ...

Embodiment 3

[0040] 72Kg of HTPB with a hydroxyl value of 0.7±0.05mmol / g, 8Kg of 12±0.6mmol / g rigid polyether with a hydroxyl value of 12±0.6mmol / g, 20Kg of PTMG with a hydroxyl value of 2±0.05mmol / g, 4Kg of 550 carbon black and 4Kg Put the DOP into a grinder for grinding. After the grinding is completed, put the material into a 200L reactor with a dispersing device, stir, and slowly heat up to 50~55 o C, add 4Kg of calcium sulfate whiskers with an aspect ratio of 85 and 26Kg of 800-mesh silicon micropowder, start the disperser to disperse for 1 hour (keep the material temperature not exceeding 90 during the dispersing process) o C), stop dispersing, heat up to 110~120 o C reduced pressure to 10~20mmHg for dehydration, after dehydration for two hours, lower the temperature to 50 o Below C, add 0.7Kg of BYK-051, 0.3Kg of DISPERBYK-2000, 0.9Kg of BYK-373 and 0.6Kg of N-β(aminoethyl)-γ-aminopropyltrimethoxysilane, 0.2Kg of 264 and 0.3Kg of 168, stirred for 2 hours, discharged, sealed and pa...

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Abstract

The invention provides a normal-temperature cured polyurethane resin composition for filling CRTS-I type high-speed railway cam basements and a preparation method thereof. The resin composition is formed by proportionally mixing and curing components A and B, the component A is composed of hydroxyl-terminated polybutadiene, polyether polyol, inorganic filler, plasticizer and auxiliary, and the component B is composed of plasticizer and polymethylene polyphenyl isocyanate. The resin composition can be prepared by respectively packing the components A and B and sufficiently mixing the same according to a certain proportion when in use. The resin component is simple and reliable in preparation process, does not need synthesis of prepolymer, has a self-catalysis system and is long in storage period, and has the two components when in use, thereby being excellent in performance; the components A and B are low in viscosity, easy to mix well and high in fluidity; adding of a lot of plasticizers is not needed, so that the resin composition is environment-friendly, easier to operate during pouring and supportive of construction with a range of 5-40oC. The raw materials are easy to get, process operability is high, and the resin composition is stable in quality.

Description

technical field [0001] The invention relates to a normal temperature curing polyurethane resin composition and a preparation method thereof, in particular to a polyurethane resin used for filling convex blocks of CRTS-I high-speed railways. The resin can be used at -5 to 40 o Construction and curing within the C range. Background technique [0002] The lower foundation, base, and ballast bed slab (or CA mortar cushion) of the ballastless track are all poured on site; double-block sleepers, track slabs, under-rail rubber pads, fasteners, and rails are all factory prefabricated parts or standard products , which can guarantee a good uniformity of its performance. Compared with the ballasted track, the overall structure of the track thus formed has better structural continuity and uniformity of rigidity, which provides favorable conditions for improving the smoothness of the track and improving the ride quality. The stability of the track is good, and the maintenance workload...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/69C08G18/48C08K13/04C08K3/36C08K3/04C08K7/08C08K5/12C08K5/11C08K5/544
CPCC08G18/7664C08G18/4009C08G18/4804C08G18/4854C08G18/698C08K3/04C08K3/36C08K5/11C08K5/12C08K5/544C08K7/08C08K13/04C08K2201/003C08K2201/016
Inventor 吴明江蔡彦王雪琴吴旭何伟
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY