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High-temperature-resistant liquid sealant

A technology of liquid sealing and high temperature resistance, which can be applied in other chemical processes, chemical instruments and methods, etc. It can solve the problems of high viscosity, large shrinkage, and low solid content of products, and achieve low viscosity, small shrinkage, and good thermal conductivity. Effect

Active Publication Date: 2010-05-12
GUANGDONG SANVO CHEM IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, due to the low solid content of common solvent-based liquid sealants, the shrinkage after sizing is large, which is generally improved by increasing the solid content of the glue, but at the same time, the viscosity of the product is too high and the workability is affected. Refining can be used. Glue to reduce the viscosity of the glue
In addition, people pay more and more attention to environmental issues, and some solvents commonly used in solvent-based adhesives, such as toluene and methylene chloride, have been restricted in the application of adhesives.

Method used

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  • High-temperature-resistant liquid sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the proportion by weight, 25 parts of methylcyclohexane and 13 parts of butyl acetate are added to the reactor, and at a stirring speed of 300 rpm, drop into the hydrogenated nitrile rubber compound (proportion by weight: hydrogenated Nitrile rubber: nano cerium oxide: quartz powder: aluminum silicate: carbon black N550: stearic acid = 15:3:12:5:2:0.1, just crushed after mixing evenly) 45 parts, terpene phenolic resin 6.8 parts of SP-46OB, 3.5 parts of fumed silica, 5 parts of aluminum powder, 1.5 parts of dibutyl phthalate, 0.2 parts of γ-aminopropyltriethoxysilane, stir for 5 hours until the glue is uniform, and cool To normal temperature, the finished product is discharged.

Embodiment 2

[0032] According to the proportion by weight, 22 parts of methylcyclohexane and 14 parts of butyl acetate are added to the reactor, and at a stirring speed of 300 rpm, drop into the hydrogenated nitrile rubber compound (proportion by weight: hydrogenated Nitrile rubber: nano cerium oxide: quartz powder: aluminum silicate: carbon black N550: stearic acid = 20:5:8:7:3:0.3, just crush after mixing evenly) 45 parts, terpene phenolic resin 5.5 parts of SP-12, 3.2 parts of fumed silica, 8 parts of aluminum powder, 2 parts of dioctyl phthalate, 0.3 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, stirred for 5 Hours until the glue is uniform, cooled to room temperature, and the finished product is discharged.

Embodiment 3

[0034] According to the proportion by weight, 22 parts of methylcyclohexane and 14 parts of butyl acetate are added to the reactor, and at a stirring speed of 250 rpm, drop into the hydrogenated nitrile rubber compound (proportion by weight: hydrogenated Nitrile rubber: nano cerium oxide: quartz powder: aluminum silicate: carbon black N550: stearic acid = 25:8:2:10:4:0.5, just crush after mixing evenly) 43 parts, terpene phenolic resin 5.5 parts of SP-154, 3.2 parts of fumed silica, 10 parts of aluminum powder, 1.8 parts of decyl phthalate, 0.5 parts of γ-methacryloxypropyl trimethoxysilane, stirred for 4.5 hours until the glue Evenly, cool to normal temperature, and the finished product is discharged.

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Abstract

The invention discloses a high-temperature-resistant liquid sealant, which comprises the following main components: hydrogenated nitrile rubber compound, methyl cyclohexane, butyl acetate, terpene phenolic resin, gas-phase silica, aluminum powder, plasticizers and coupling agents. The sealant has the following advantages of: 1, adopting hydrogenated nitrile rubber as base material and having capability of long-term use at a high temperature and good aging resistance; 2, adding high-temperature-resistant fillers to improve the heat resistance of the sealant; 3, adding the aluminum powder to improve the thermal conductivity of the sealant; 4, adopting an environment-friendly solvent system, taking the methyl cyclohexane and the butyl acetate as mixed solvent, having little smell and low toxicity and meeting requirements of environmental protection; and 5, adopting a preparation process high in solid content and low in viscosity and having construction convenience and suitability for injection and extrusion processes.

Description

Technical field: [0001] The invention relates to the field of solvent-based liquid sealant, in particular to a solvent-type high-temperature-resistant liquid sealant. Background technique: [0002] Liquid sealant is made of natural or synthetic rubber, resin, fiber and other polymer materials as the base material, mixed with fillers, toughening agents and other additives. It can contain or not contain solvents. It can replace solid gaskets, Good results have been achieved in solving leakage and sealing, and at the same time, it is convenient to use, does not require high precision for the joint surface, and has low cost and labor intensity. Therefore, it is a supplement and improvement to traditional solid sealing materials. Among them, the solvent-based liquid sealant has been widely used in automotive engines, oil pan seals, mechanical seals and other fields due to its fast drying speed and easy use. [0003] The optimization of base materials is one of the main means to...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L61/14C08K3/22C08K3/08C09K3/10
Inventor 陈炳耀陈亮谌政辉
Owner GUANGDONG SANVO CHEM IND TECH
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