Nitrile butadiene rubber sealant

A technology of nitrile rubber and sealant, which is applied in the field of sealant, which can solve the problems of complex manufacturing process and various ingredients, and achieve the effects of high bonding strength, small curing shrinkage and high bonding performance

Inactive Publication Date: 2014-08-20
TIANCHANG YONG TAI SEALING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealants in the prior art are mostly used in the construction industry and the electronics industry, and have the functions of bonding, sealing, le

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of NBR sealant that the present invention proposes, raw material comprises by weight: 30 parts of nitrile rubber, 24 parts of styrene-butadiene rubber, 20 parts of dioctyl phthalate, 45 parts of calcium carbonate, 8 parts of curing agent, 8 parts of glycerol modified resin, 10 parts of fumed white carbon black, 2 parts of dicyandiamide, 24 parts of epoxy resin, wherein the acrylonitrile content of nitrile rubber is 33%, and the curing agent consists of boron trifluoride and aliphatic Composition of diamine; react epoxy resin and 1.3 parts of dicyandiamide at 150°C for 50 minutes to obtain mixed resin; react nitrile rubber, styrene-butadiene rubber and remaining dicyandiamide at 120°C for 80 minutes to obtain mixed rubber; mix resin, mix Add rubber, dioctyl phthalate, calcium carbonate, curing agent, glycerol modified resin and fumed silica into a mixing container and mix evenly. After being ground by a three-roller machine, butyl nitrile is obtained by vacuum dega...

Embodiment 2

[0020] A kind of NBR sealant proposed by the present invention, raw material comprises by weight: 40 parts of nitrile rubber, 32 parts of styrene-butadiene rubber, 30 parts of dioctyl phthalate, 55 parts of calcium carbonate, 12 parts of aliphatic diamine part, 12 parts of ethylene glycol modified resin, 20 parts of fumed silica, 1 part of dicyandiamide, 36 parts of epoxy resin, wherein the acrylonitrile content of nitrile rubber is 31%; epoxy resin and 0.7 part of bis React cyanamide at 180°C for 60 minutes to obtain mixed resin; react nitrile rubber, styrene-butadiene rubber and remaining dicyandiamide at 140°C for 100 minutes to obtain mixed rubber; mix resin, mixed rubber, dioctyl phthalate, calcium carbonate , aliphatic diamine, ethylene glycol modified resin and gas-phase silica are added into a mixing container and mixed evenly. After being ground by a three-roller machine, the NBR sealant is obtained through vacuum defoaming.

Embodiment 3

[0022] A kind of NBR sealant proposed by the present invention, raw material comprises by weight: 32 parts of nitrile rubber, 30 parts of styrene-butadiene rubber, 22 parts of dioctyl phthalate, 47 parts of calcium carbonate, 9 parts of boron trifluoride part, 9 parts of unsaturated modified resin, 13 parts of fumed white carbon black, 2.4 parts of dicyandiamide, 26 parts of epoxy resin, wherein the acrylonitrile content of nitrile rubber is 35%; epoxy resin and 1.68 parts of dicyandiamide The amine was reacted at 160°C for 55 minutes to obtain a mixed resin; the nitrile rubber, styrene-butadiene rubber and the remaining dicyandiamide were reacted at 125°C for 85 minutes to obtain a mixed rubber; the mixed resin, mixed rubber, dioctyl phthalate, calcium carbonate, Add boron trifluoride, unsaturated modified resin and fumed silica into a mixing container and mix evenly. After being ground by a three-roller machine, the nitrile rubber sealant is obtained by vacuum degassing. The ...

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PUM

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Abstract

The invention discloses a nitrile butadiene rubber sealant comprising the following raw materials by weight: 30-40 parts of nitrile butadiene rubber, 24-32 parts of styrene butadiene rubber, 20-30 parts of dioctyl phthalate, 45-55 parts of calcium carbonate, 8-12 parts of a curing agent, 8-12 parts of a modifier, 10-20 parts of fumed silica, 1-3 parts of dicyandiamide and 24-36 parts of epoxy resin; the nitrile butadiene rubber sealant is prepared by the following preparation process: the epoxy resin and the dicyandiamide are reacted for 50-60min at 150-180 DEG C to obtain mixed resin, wherein the reacted dicyandiamide accounts for 65-70wt% of the total amount of the dicyandiamide; the nitrile butadiene rubber, the styrene butadiene rubber and the remaining dicyandiamide are reacted for 80-100 min at 120-140 DEG C to obtain mixed rubber; the prepared mixed resin, mixed rubber and other components are added into a mixing container for even mixing, grinding and vacuum defoamation to obtain the nitrile butadiene rubber sealant. The nitrile butadiene rubber sealant ensures the adhesion ability and sealing effect, the raw materials are easily obtained, and the nitrile butadiene rubber sealant is simple to make.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a nitrile rubber sealant. Background technique [0002] Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. . Its disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties, and slightly lower elasticity. Nitrile rubber is mainly used in the manufacture of oil-resistant rubber products. [0003] Sealant is a kind of sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of cohesion. It is an adhesive used to fill the gap in the configuration to play a sealing role. Usually, natural resin, synthetic resin, natural rubber, synthetic rubber and asphalt and other dry or non-...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L9/06C08L63/00C08K13/02C08K3/26C08K5/12C08K3/36
Inventor 刘晓朋
Owner TIANCHANG YONG TAI SEALING MATERIAL
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