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Production method of PVC (polyvinyl chloride) and NBR (nitrile-butadiene rubber) co-precipitate rubber

A production method and co-precipitation glue technology, which is applied in the production field of PVC and NBR co-precipitation glue, can solve the problems that the product cannot guarantee high temperature resistance and cannot meet the high requirements of high temperature resistant train brake shoes, and achieves improved ozone resistance and good Toughness and cold resistance, the effect of low energy consumption

Inactive Publication Date: 2015-07-15
HUANGSHAN HUALAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional powdered nitrile rubber antiaging agents are generally 1076 and 2246, and the resulting products can be used for a long time in an air medium below 120°C. For example, Lanzhou Chemical Co., Ltd. uses 1076 as an antiaging agent for powdered nitrile rubber. The agent cannot guarantee that the product can effectively withstand high temperature, and cannot meet the high requirements of high temperature resistant train brake shoes

Method used

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  • Production method of PVC (polyvinyl chloride) and NBR (nitrile-butadiene rubber) co-precipitate rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Synthesis of nitrile mucilage

[0029] First, the polymerization kettle is evacuated, and 205 parts by weight of soft water, 3 parts by weight of sodium dodecylbenzene sulfonate, 1 part by weight of sodium methylene di-naphthalene sulfonate, 0.2 parts by weight of buffering agent sodium carbonate, and 0.2 parts by weight of buffering agent sodium carbonate are dropped into successively. 0.55 parts by weight of regulator tertiary dodecyl mercaptan and 0.5 parts by weight of trimethylolpropane trimethacrylate, after stirring for 10 minutes, add 34 parts by weight of acrylonitrile, 0.2 parts by weight of initiator potassium persulfate and 0.04 parts by weight of oxygen scavenger parts, nitrogen filling and vacuuming and repeated three times, then add 60.5 parts by weight of butadiene, 5 parts by weight of methacrylic acid and 0.12 parts by weight of the active phase, at a reaction temperature of 25 to 35 ° C and a reaction pressure of 0.2 to 0.52 MPa, The reaction time...

Embodiment 2

[0037] In the synthesis step of the nitrile mortar in Example 1, add 210 parts by weight of soft water, 3 parts by weight of emulsifier sodium dodecylbenzenesulfonate, 33 parts by weight of acrylonitrile, 61.5 parts by weight of butadiene, trimethylol 0.5 parts by weight of propane trimethacrylate and 5 parts by weight of methacrylic acid, and other process formulas are the same as in Example 1;

[0038] The performance index of gained nitrile glue is: pH value 6.6, Mooney viscosity (ML 1+4 100℃ ) 50, total solids concentration 30.8%, gel content 15%, combined acrylonitrile content 31.8%;

[0039] After isolation into powder and dehydration and drying, the resulting product index is within the control range shown in Table 2.

Embodiment 3

[0041] In the synthesis step of the nitrile mortar in Example 1, add 210 parts by weight of soft water, 3 parts by weight of emulsifier sodium dodecylbenzenesulfonate, 33 parts by weight of acrylonitrile, 56.5 parts by weight of butadiene, trimethylol 0.5 parts by weight of propane trimethacrylate, 10 parts by weight of methacrylic acid, and other process formulas are the same as in Example 1;

[0042] The performance index of gained nitrile glue is: pH value 5.5, Mooney viscosity (ML 1+4 100℃ ) 41, the total solids concentration is 30.9%, the gel content is 10.2%, and the combined acrylonitrile content is 31.3%;

[0043] After isolation into powder and dehydration and drying, the resulting product index is within the control range shown in Table 2.

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Abstract

The invention relates to a production method of PVC and NBR co-precipitation glue, comprising the following steps: sequentially input soft water, emulsifier, diffusing agent, buffering agent, molecular weight regulator, crosslinking agent, acrylonitrile, methacrylic acid, initiator, Oxygen scavenger, butadiene and active phase carry out polymerization reaction, add regulator in the middle, and finally add compound terminator to terminate reaction, obtain nitrile mortar; Add the nitrile mortar, anti-aging agent, concentration 1-2% low-hardness trialkylammonium chloride solution, PVC emulsion, high-hardness trialkylammonium chloride solution, magnesium sulfate or calcium chloride solution with a concentration of 0.2-0.4%, fully condense, and then add compound release agent, cooling to obtain powdered nitrile rubber slurry; finally dehydrating and drying the nitrile rubber slurry. The invention has the advantages of simple process, low cost, low energy consumption and high conversion rate, and the PVC and NBR co-precipitation glue provided by the invention has good toughness and cold resistance.

Description

technical field [0001] The invention relates to a production method of co-precipitation glue, in particular to a production method of PVC and NBR co-precipitation glue. Background technique [0002] Among various rubber-plastic blending materials, the production technology of nitrile rubber (NBR) / polyvinyl chloride (PVC) blending rubber industry (1958) is the most mature, with many production enterprises and wide application range, and it is still widely used today . Foreign countries have conducted a lot of research on NBR / PVC since 1946, and the industrial production technology has developed rapidly, and the scope of application has gradually expanded. A lot of research on NBR / PVC has also been carried out in China, mostly in the laboratory. Although there are many manufacturers for industrial production, the method of physical blending of NBR glue and PVC powder is the main method. There are three methods of manufacturing NBR / PVC blends: emulsion co-precipitation method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L27/06C08K5/13C08K5/372C08C1/15C08F236/12C08F220/06C08F222/14
Inventor 储银亮李显臣胡斌章卫东吴踪影许旭东潘小明
Owner HUANGSHAN HUALAN TECH
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