CN111087609A - Preparation method of high-wear-resistance MC nylon - Google Patents
Preparation method of high-wear-resistance MC nylon Download PDFInfo
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- CN111087609A CN111087609A CN201911371889.3A CN201911371889A CN111087609A CN 111087609 A CN111087609 A CN 111087609A CN 201911371889 A CN201911371889 A CN 201911371889A CN 111087609 A CN111087609 A CN 111087609A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
Abstract
The invention belongs to the technical field of high-wear-resistance MC nylon preparation and discloses a preparation method of high-wear-resistance MC nylon. The manufacturing method comprises the steps of preheating a mold, preparing an active body, casting and humidifying; the nylon polymer has tensile strength of 74.9MPa, compressive strength of 105.4MPa, bending curvature of 110.1MPa and impact strength of 9.8KJ/m2. The friction coefficient of 0.0977 is that the basic catalyst sodium hydroxide, graphite and white oil are added into monomer caprolactam, then polymethylene polyphenyl polyisocyanate is added, and under the specific condition, the MC nylon with high wear resistance is produced.
Description
Technical Field
The invention relates to the technical field of high-wear-resistance MC nylon preparation, in particular to a preparation method of MC nylon with improved wear resistance by adding white oil.
Background
The MC nylon is also called monomer casting nylon and has the excellent performances of small density, light weight, large molecular weight, high mechanical strength, friction resistance, self lubrication and the like. Is widely used for: the high-wear-resistance products such as various pulleys, sliders, gears and the like in mechanical manufacturing and military equipment are simple to operate, easy to mold and low in manufacturing cost due to the adoption of a monomer synthesis casting mode, and mechanical parts with different shapes can be manufactured by machining a casting blank. Along with the strength of the machinery manufacturing industry in China.
At present, the mechanical properties, especially high wear resistance, of the domestic common MC nylon cannot meet the requirements of modern manufacturing industry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a preparation method of high-wear-resistance MC nylon, which is prepared by adding alkaline catalysts sodium hydroxide, graphite and white oil into monomer caprolactam and then adding polymethylene polyphenyl polyisocyanate under specific conditions and can effectively solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, namely weighing caprolactam in a metering manner, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuing heating to 130 ℃, and adding NaoH, graphite and white oil into the reaction kettle;
s3: casting, stopping heating by a vacuum machine, adding polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring active materials into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
As a preferred embodiment of the present invention, the step S2 further includes:
heating, vacuum dewatering, maintaining for 10 min when the vacuum degree reaches 1.33KPa, and heating to 145 deg.C.
In a preferred embodiment of the present invention, the caprolactam in step S2 is 1000 parts by weight;
the NaoH accounts for 1-2 parts by weight;
2-4 parts of graphite;
the white oil accounts for 20-30 parts by weight.
In a preferred embodiment of the present invention, the polymethylene polyphenyl polyisocyanate used in step S3 is 5 to 7 parts by weight.
As a preferred technical scheme of the invention, the caprolactam accounts for 1000 parts;
the NaoH accounts for 1.5 parts;
the graphite is 4 parts;
30 parts of white oil;
the polymethylene polyphenyl polyisocyanate is 6 parts.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
the MC nylon with high wear resistance is prepared by adding alkaline catalyst sodium hydroxide, graphite and white oil into monomer caprolactam, and then adding polymethylene polyphenyl polyisocyanate under specific conditions.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In order to better understand the technical solutions, the technical solutions will be described in detail with reference to the description and the specific embodiments.
The first embodiment is as follows:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts by weight of caprolactam, putting the caprolactam into a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating to 130 ℃, adding 1.5 parts by weight of NaoH1 and 4 parts by weight of graphite into the reaction kettle, continuously heating, dewatering in vacuum, maintaining for 10 minutes when the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 6 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2The nylon had a coefficient of friction of 0.267.
Example two:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts by weight of caprolactam, putting the caprolactam into a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating to 130 ℃, adding 1.5 parts by weight of NaoH1, 4 parts by weight of graphite and 30 parts by weight of white oil into the reaction kettle, continuously heating, dewatering in vacuum, maintaining for 10 minutes after the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 6 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2The nylon had a coefficient of friction of 0.0977.
Example three:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts by weight of caprolactam, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating to 130 ℃, adding NaoH1 parts by weight, graphite 2 parts by weight and white oil 20 parts by weight into the reaction kettle, continuously heating, dewatering in vacuum, maintaining for 10 minutes after the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 5 parts of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring the active material into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out the product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa and strong compressionThe degree is as follows: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2And the friction coefficient of the nylon is 1.85.
Example four:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts of caprolactam in a metering manner, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating the caprolactam to 130 ℃, adding 2 parts of NaoH, 4 parts of graphite and 30 parts of white oil in the reaction kettle, continuously heating, dewatering in vacuum, maintaining the vacuum for 10 minutes when the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 7 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, impact strength of the simply supported beam: 9.8KJ/m2. Coefficient of friction 1.702
Example five:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts of caprolactam in a metering manner, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating the caprolactam to 130 ℃, adding 1.8 parts of NaoH1, 3 parts of graphite and 25 parts of white oil into the reaction kettle, continuously heating and dewatering in vacuum, maintaining the vacuum for 10 minutes when the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 5.5 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuously heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2. Coefficient of friction 1.504
Example six:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts of caprolactam in a metering manner, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating to 130 ℃, adding 1.9 parts of NaoHl, 3.5 parts of graphite and 28 parts of white oil into the reaction kettle, continuously heating, dewatering in vacuum, maintaining for 10 minutes after the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 6.5 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuously heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2. Coefficient of friction 1.204
Example seven:
the invention relates to a preparation method of high-wear-resistance MC nylon, which comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing an active body, weighing 1000 parts of caprolactam in a metering manner, placing the caprolactam in a reaction kettle, heating and melting the caprolactam to 110 ℃, starting a vacuum pump to dewater, continuously heating to 130 ℃, adding 1.4 parts of NaoH1, 3.5 parts of graphite and 28 parts of white oil into the reaction kettle, continuously heating, dewatering in vacuum, maintaining for 10 minutes after the vacuum degree reaches 1.33KPa, and heating to 145 ℃;
s3: casting, stopping heating by a vacuum machine, adding 5.5 parts by weight of polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring an active material into a preheated mold, putting the mold back into the oven, continuously heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
The MC nylon prepared by the preparation method has the following tensile strength: 74.9MPa, compressive strength: 105.4MPa, bending camber: 110.1MPa, and the impact strength of the simply supported beam is as follows: 9.8KJ/m2. Coefficient of friction 1.152
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A preparation method of high wear-resistant MC nylon is characterized by comprising the following steps: the method comprises the following steps:
s1: preheating the mold, cleaning the mold, placing the mold in a 165-sand 170 ℃ oven, and keeping the temperature for 0.5 hour;
s2: preparing active body, weighing caprolactam, heating and melting to 110 deg.C in reactor, dewatering by vacuum pump, heating to 130 deg.C, stopping vacuum pump, adding NaoH, graphite and white oil into reactor, starting vacuum pump, and heating to 145 deg.C
S3: casting, stopping heating by a vacuum machine, adding polymethylene polyphenyl polyisocyanate into the reaction kettle, stirring for 1 minute, opening an oven, pouring active materials into a preheated mold, putting the mold back into the oven, continuing heating for 8-12 minutes, stopping heating, opening the oven, taking out the mold, naturally cooling for 10 minutes, and taking out a product from the mold;
s4: and (4) humidifying, namely taking out the product from the mold, completely cooling the product in a natural state, putting the product into boiling water for cooking for 48 hours, and cooling the product to the normal temperature along with a cooking container for standby.
2. The preparation method of the high wear-resistant MC nylon as claimed in claim 1, wherein the preparation method comprises the following steps: the step S2 further includes:
heating, vacuum dewatering, maintaining for 10 min when the vacuum degree reaches 1.33KPa, and heating to 145 deg.C.
3. The preparation method of the high wear-resistant MC nylon as claimed in claim 2, wherein the preparation method comprises the following steps: 1000 parts by weight of caprolactam in step S2;
the NaoH accounts for 1-2 parts by weight;
2-4 parts of graphite;
the white oil accounts for 20-30 parts by weight.
4. The preparation method of the high wear-resistant MC nylon as claimed in claim 2, wherein the preparation method comprises the following steps: the polymethylene polyphenyl polyisocyanate in the step S3 is 5-7 parts by weight.
5. The method for preparing high wear-resistant MC nylon according to claim 4, wherein the method comprises the following steps: 1000 parts of caprolactam;
the NaoH accounts for 1.5 parts;
the graphite is 4 parts;
30 parts of white oil;
the polymethylene polyphenyl polyisocyanate is 6 parts.
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| CN201911371889.3A CN111087609A (en) | 2019-12-26 | 2019-12-26 | Preparation method of high-wear-resistance MC nylon |
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| CN201911371889.3A CN111087609A (en) | 2019-12-26 | 2019-12-26 | Preparation method of high-wear-resistance MC nylon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710427A (en) * | 2022-11-25 | 2023-02-24 | 广东金造电力科技有限公司 | Production process of composite material pay-off bracket |
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| CN101724263A (en) * | 2008-10-20 | 2010-06-09 | 孙强 | Black MC nylon provided with black resin oil ink and preparation method thereof |
| CN103570937A (en) * | 2012-07-20 | 2014-02-12 | 合肥杰事杰新材料股份有限公司 | Phenolic resin/MC nylon composite material, and preparation method thereof |
| CN104710611A (en) * | 2013-12-17 | 2015-06-17 | 广东科进尼龙管道制品有限公司 | Thermal conductive MC nylon composite material and preparation method thereof |
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2019
- 2019-12-26 CN CN201911371889.3A patent/CN111087609A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724263A (en) * | 2008-10-20 | 2010-06-09 | 孙强 | Black MC nylon provided with black resin oil ink and preparation method thereof |
| CN103570937A (en) * | 2012-07-20 | 2014-02-12 | 合肥杰事杰新材料股份有限公司 | Phenolic resin/MC nylon composite material, and preparation method thereof |
| CN104710611A (en) * | 2013-12-17 | 2015-06-17 | 广东科进尼龙管道制品有限公司 | Thermal conductive MC nylon composite material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710427A (en) * | 2022-11-25 | 2023-02-24 | 广东金造电力科技有限公司 | Production process of composite material pay-off bracket |
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