Low temperature resistant environmentally-friendly sealant and preparation method thereof

An environment-friendly, low-temperature-resistant technology, applied in the field of sealants, can solve problems such as poor compatibility, poor low-temperature resistance, and reduced low-temperature resistance, and achieve the effects of improving bonding performance, improving low-temperature resistance, and increasing bonding strength

Inactive Publication Date: 2018-11-06
HEFEI ZHENXUN LOW TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing Chinese patent document (publication number: CN105086921B) discloses a low-temperature resistant silicone sealant, which is made of the following components in parts by weight: 100 parts of blocked polydimethylsiloxane, 5 parts of plasticizer ~10 parts, 15~20 parts of filler, 3~10 parts of crosslinking agent, 1~2 parts of catalyst, 0.5~1 part of coupling agent, 1~2 parts of stabilizer, 1.5~2 parts of anti-aging agent, 2 parts of tackifier ~6 parts, 4~5 parts of solubilizer PE-g-MAH, 10~12 parts of polysulfone, 14~15 parts of calcium carbonate hollow microspheres, the low temperature resistance of the invention components is mainly composed of calcium carbonate hollow microsphe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A low-temperature resistant and environment-friendly sealant of this embodiment comprises the following raw materials in parts by weight:

[0034] 42 parts of blocked polydimethylsiloxane, 28 parts of modified epoxy resin, 14 parts of polytetrafluoroethylene, 16 parts of microsilica fume, 8 parts of crosslinking agent, 6 parts of adhesive, 5 parts of emperor felt moss , 6 parts of epoxidized soybean oil, 1 part of p-phenylenediamine, and 2 parts of ethylene glycol butyl ether.

[0035] The preparation method of the modified epoxy resin in this example is that the epoxy resin is added into the reaction kettle, the reaction temperature is 85°C, and the temperature is kept for 25 minutes, then the acidified graphene is added, ultrasonically dispersed, and dispersed for 6 minutes, and then polyurethane is added, and the reaction temperature Raise to 95°C, react for 35 minutes, then add polyisocyanate, continue to stir for 15 minutes, and then cool to room temperature to obt...

Embodiment 2

[0045] A low-temperature resistant and environment-friendly sealant of this embodiment comprises the following raw materials in parts by weight:

[0046] 46 parts of blocked polydimethylsiloxane, 32 parts of modified epoxy resin, 18 parts of polytetrafluoroethylene, 22 parts of microsilica fume, 14 parts of crosslinking agent, 10 parts of adhesive, 9 parts of imperial felt moss , 10 parts of epoxidized soybean oil, 3 parts of p-phenylenediamine, 6 parts of ethylene glycol butyl ether.

[0047] The preparation method of the modified epoxy resin in this embodiment is that the epoxy resin is added into the reaction kettle, the reaction temperature is 95° C., and the temperature is kept for 25-35 minutes, then acidified graphene is added, ultrasonically dispersed, dispersed for 10 minutes, and then polyurethane is added. The reaction temperature was raised to 105°C, reacted for 45 minutes, then added polyisocyanate, continued to stir for 25 minutes, and then cooled to room tempera...

Embodiment 3

[0057] A low-temperature resistant and environment-friendly sealant of this embodiment comprises the following raw materials in parts by weight:

[0058] 44 parts of end-blocked polydimethylsiloxane, 30 parts of modified epoxy resin, 16 parts of polytetrafluoroethylene, 19 parts of micro-silica fume, 11 parts of crosslinking agent, 8 parts of adhesive, 7 parts of emperor felt moss , 8 parts of epoxidized soybean oil, 2 parts of p-phenylenediamine, and 4 parts of ethylene glycol butyl ether.

[0059] The preparation method of the modified epoxy resin in this example is that the epoxy resin is added to the reaction kettle, the reaction temperature is 90°C, and the temperature is kept for 30 minutes, then acidified graphene is added, ultrasonically dispersed, dispersed for 8 minutes, and then polyurethane is added, and the reaction temperature Raise to 100°C, react for 40 minutes, then add polyisocyanate, continue to stir for 20 minutes, and then cool to room temperature to obtai...

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Abstract

The invention discloses a low temperature resistant environmentally-friendly sealant. The low temperature resistant environmentally-friendly sealant comprises the following raw materials in parts by weight: 42 to 46 parts of blocking polydimethylsiloxane, 28 to 32 parts of modified epoxy resin, 14 to 18 polytetrafluoroethylene, 16 to 22 parts of silica fume, 8 to 14 parts of a cross-linking agent,6 to 10 parts of a binder, 5 to 9 parts of a king sundew, 6 to 10 parts of epoxidized soybean oil, 1 to 3 parts of p-phenylenediamine and 2 to 6 parts of butyl cellosolve. According to the low temperature resistant environmentally-friendly sealant provided by the invention, compared with the prior art, the low temperature resistance of the sealant is greatly improved, and the sealant has preferable use value and good application prospect.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a low-temperature resistant and environment-friendly sealant and a preparation method thereof. Background technique [0002] The sealant can replace the imported oil-resistant sealant. It is used as a complete set for all automobile manufacturers, agricultural vehicle factories, forklift factories, diesel engine factories, shipyards and other manufacturers. It can be used in electric power, chemical industry, machinery, gearboxes, oil tanks, oil bottoms, Oil, gas and water sealing of cork pads, front and rear axles, front and rear end covers, etc. It is also suitable for detachable joint surfaces or flanges of automobiles, motorcycles and other engines, water pumps, valves, gear boxes, reduction boxes, etc. It can also be used for detachable thread sealing, and the silicone sealant has strong gap filling ability, aging resistance, and surface curing is less than 20 minutes. Comp...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J163/00C09J127/18C09J11/04C09J11/06C09J11/08
CPCC08L2205/035C09J11/04C09J11/06C09J11/08C09J183/04C08L63/00C08L27/18C08L91/00C08K3/36C08K9/02C08K3/042C08K5/18C08K5/14
Inventor 周青松
Owner HEFEI ZHENXUN LOW TEMPERATURE TECH CO LTD
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