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Pipe thread sealant for tunnel construction

A tunnel construction and sealant technology, applied in the direction of adhesives, epoxy resin glue, polyether adhesive, etc., can solve the problems of insufficient lubricity and sealing performance, residue cleaning and treatment pollution, etc., and achieve good durability Good heat and cold resistance, wettability and lubricity, and good water resistance

Active Publication Date: 2019-03-01
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product is an oil-based thread grease that does not contain lead and zinc, which solves the problem of oil field pollution. However, since the thread grease carrier is still grease, and the filler is made of polytetrafluoroethylene (Teflon PTFE), the residue cleaning There are still pollution problems in the treatment and treatment; in addition, the performance evaluation of full-scale oil casings for these products, the lubricity and sealing of the products are not satisfactory results

Method used

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  • Pipe thread sealant for tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The pipe thread sealant for tunnel construction in this embodiment, the sealant raw material includes the following components by weight: 30 parts of epoxy resin, 15 parts of polytetrahydrofuran ether polyol, 5 parts of 2,4-toluene diisocyanate, 3 parts , 5 parts of 3'-dichloro-4,4' diaminodiphenylmethane, 1 part of azobisisobutyronitrile, 1 part of poly-n-butyl methacrylate, 5 parts of styrene elastomer, poly-2,6 - 2 parts of dimethyl-1,4-phenylene ether, 5 parts of polyvinyl acetate, 5 parts of ceramic particles, 1 part of silicon dioxide, 1 part of antioxidant, 1 part of tackifier; the tunnel construction pipe Thread sealants are prepared by:

[0017] a. Mix epoxy resin and polytetrahydrofuran ether polyol and heat to 95°C, continue to heat to 110°C and dehydrate under high vacuum for 2 hours, then cool down to 45°C, then add 2,4-toluene diisocyanate, Styrene elastomer, poly-2,6-dimethyl-1,4-phenylene ether and polyvinyl acetate were heated to 75°C for 2 hours;

[...

Embodiment 2

[0020] The pipe thread sealant for tunnel construction in this embodiment, the sealant raw material includes the following components by weight: 40 parts of epoxy resin, 25 parts of polytetrahydrofuran ether polyol, 15 parts of 2,4-toluene diisocyanate, 3 , 10 parts of 3'-dichloro-4,4' diaminodiphenylmethane, 5 parts of azobisisobutyronitrile, 5 parts of poly-n-butyl methacrylate, 10 parts of styrene elastomer, poly-2,6 - 6 parts of dimethyl-1,4-phenylene ether, 10 parts of polyvinyl acetate, 15 parts of ceramic particles, 5 parts of silicon dioxide, 5 parts of antioxidant, 3 parts of tackifier; the tunnel construction pipe Thread sealants are prepared by:

[0021] a. Mix epoxy resin and polytetrahydrofuran ether polyol and heat to 105°C, continue to heat to 110-120°C, dehydrate under high vacuum for 2 hours, then cool down to 55°C, and then add 2,4-toluene Continue to heat isocyanate, styrene elastomer, poly-2,6-dimethyl-1,4-phenylene ether and polyvinyl acetate to 85°C for ...

Embodiment 3

[0024] The pipe thread sealant for tunnel construction in this embodiment, the sealant raw material includes the following components by weight: 30 parts of epoxy resin, 25 parts of polytetrahydrofuran ether polyol, 5 parts of 2,4-toluene diisocyanate, 3 parts , 10 parts of 3'-dichloro-4,4' diaminodiphenylmethane, 1 part of azobisisobutyronitrile, 5 parts of poly-n-butyl methacrylate, 5 parts of styrene elastomer, poly-2,6 - 6 parts of dimethyl-1,4-phenylene ether, 5 parts of polyvinyl acetate, 15 parts of ceramic particles, 1 part of silicon dioxide, 5 parts of antioxidant, 1 part of tackifier; the tunnel construction pipe Thread sealants are prepared by:

[0025] a. Mix epoxy resin and polytetrahydrofuran ether polyol and heat to 95°C, continue to heat to 120°C and dehydrate under high vacuum for 2 hours, then cool down to 45°C, then add 2,4-toluene diisocyanate, Styrene elastomer, poly-2,6-dimethyl-1,4-phenylene ether and polyvinyl acetate were heated to 85°C for 2 hours; ...

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Abstract

The invention discloses a pipe thread sealant for tunnel construction. The pipe thread sealant is prepared from 30-40 parts of epoxy resin, 15-25 parts of PTMG (poly(tetramethylene ether) glycol polyols), 5-15 parts of TDI (2,4-toluene diisocynate), 5-10 parts of 3,3'-dichloro-4,4'-diaminodiphenylmethane, 1-5 parts of AIBN (azodiisobutyronitrile), 1-5 parts of PBMA (polybutyl methacrylate), 5-10 parts of styrene elastomers, 2-6 parts of poly(2,6-dimethyl-1,4-phenylene oxide), 5-10 parts of polyvinyl acetate, 5-15 parts of ceramic particles, 1-5 parts of silicon dioxide, 1-5 parts of an antioxidant and 1-3 parts of a tackifier. The pipe thread sealant is prepared from the epoxy resin as a main raw material and has good wettability, lubricity and waterproofness, all possible leakage paths ofa thread can be sufficiently filled with sealing grease, an elastoplastic polymer is formed by curing, a sealing layer is formed on the thread surface, so that the sealing part is free of holes and gaps, and meanwhile, the product has good heat resistance, cold resistance, high-pressure resistance and aging resistance.

Description

technical field [0001] The invention relates to the field of pipe sealing, in particular to a pipe thread sealant for tunnel construction. Background technique [0002] Ordinary oil-based thread grease is a viscous paste before it is buckled, and its state does not change after it is buckled. However, when it is subjected to high-temperature steam, it will gradually lose some of its components, and finally it will be dry and powdery, unable to continue. Play its auxiliary sealing and anti-sticking role, resulting in heat loss. Since the original AIP thread grease contains a large amount of heavy metals such as lead and zinc, the thread grease may flow out with the grease during and after thread make-up, polluting the surrounding environment and water resources; in addition, used The thread grease container and its residues are also more polluting to the environment. Some developed countries such as Japan, the United States, Canada, etc. have developed a green product to so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J175/08C09J133/08C09J153/02C09J171/12C09J131/04C09J11/04C09J11/06C09J11/08
CPCC08L2201/08C08L2205/035C09J11/04C09J11/06C09J11/08C09J163/00C08L75/08C08L33/08C08L53/02C08L71/12C08L31/04C08L61/06C08K13/06C08K9/06C08K3/36
Inventor 王羽周引王不凡张庆明夏志国
Owner CHONGQING JIAOTONG UNIVERSITY
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