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A method of modifying mc nylon with flexible hydrogenated c9 petroleum resin

A petroleum resin and flexible technology, applied in the field of polymer material modification, can solve the problems of decreased tensile strength of materials, low impact strength at low temperature, limited application scope, etc., to improve tensile strength, reduce production costs, and broaden application fields Effect

Active Publication Date: 2022-07-08
NINGBO POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] MC nylon (cast nylon, cast nylon) is a widely used high-performance engineering plastic, with large molecular weight, high crystallinity, low polymerization temperature, good mechanical properties, self-lubricating, corrosion resistance, shock absorption and noise reduction, and wide application range And other advantages, can be made into gears, pulleys, sliders, high-pressure sealing rings, electrical connectors, bearings, bearing bushes, cages, etc., and are gradually replacing metal materials such as steel, iron, and aluminum, and are widely used in machinery, automobiles, petrochemicals, National defense, medical and other industries, but MC nylon also has disadvantages such as poor acid resistance, low low temperature impact strength and high water absorption, which limit its application range
Patents such as CN2018110007645, CN2019109206572 and CN201711025703X use inorganic filler blending to modify MC nylon. Although the mechanical properties of MC nylon can be improved through inorganic filler blending modification, the compatibility between the inorganic filler and the MC nylon matrix is ​​poor, and it is necessary to coat the surface of the inorganic material. Coated modification, the process is complicated, and will lead to a decrease in the tensile strength of the material. Therefore, a new modification method is urgently needed to improve the performance of MC nylon, especially the impact strength

Method used

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  • A method of modifying mc nylon with flexible hydrogenated c9 petroleum resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh the following components by mass percentage: 28% maleic anhydride, 69% n-octadecanol, 1.5% toluenesulfonic acid, 1.5% petroleum ether, and add them to a four-necked bottle with a stirring device in turn. A reflux condenser and a water separator are installed on the bottle, and then heated to 120 ℃ with an electric heating insulation jacket to carry out the esterification reaction. The water generated by the reaction and the water-carrying agent form an azeotrope and are distilled out, and the water is separated by a water separator. When the amount of water is equal to the theoretical water output or the water output is no longer increased, the esterification reaction is completed. ;

[0025] 100g C9 petroleum resin was put into the four-necked bottle with stirring device, and the oil bath was heated to a molten state, and 10g of the above-obtained di-n-stearyl maleate was added, and 1.5g of di-n-stearyl maleate was added in batches at 200° C. Azobisisobutyronitr...

Embodiment 2

[0029] Weigh the following components by mass percentage: 18% maleic anhydride, 80% n-heptanol, 0.5% toluenesulfonic acid, 1.5% toluene, and add them to a four-necked bottle with a stirring device in turn, and put them on the four-necked bottle. The reflux condenser and the water separator are then heated to 100 ℃ with an electric heating insulation jacket to carry out the esterification reaction. The water generated by the reaction and the water-carrying agent form an azeotrope and are distilled out, and the water is separated by a water separator. When it is equal to the theoretical water output or the water output is no longer increased, the esterification reaction is completed, and the product is subjected to vacuum distillation, alkali washing, water washing and vacuum drying to obtain milky white waxy n-heptanol maleate;

[0030] 100g C9 petroleum resin is put into the four-necked flask with stirring device, and the oil bath is heated to a molten state, and 5g of the abov...

Embodiment 3

[0034] Weigh the following components by mass percentage: 28% maleic anhydride, 69% n-pentacosanol, 1.5% toluenesulfonic acid, 1.5% cyclohexane, and add them to a four-necked flask with a stirring device in turn. The four-necked bottle is equipped with a reflux condenser and a water separator, and then heated to 120°C with an electric heating jacket to carry out the esterification reaction. The water generated by the reaction and the water-carrying agent form an azeotrope and steam out, and the water is separated by a water separator. When the amount of water removed from the system is equal to the theoretical water output or the water output no longer increases, the esterification reaction is completed. pentadecanol ester;

[0035] 100g C9 petroleum resin is put into the four-necked bottle with stirring device, the oil bath is heated to the molten state, 15g of the above-obtained bis-n-pentacosyl maleate is added, and azo is added in batches at 180° C. Dimethyl diisobutyrate...

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Abstract

The invention belongs to the technical field of polymer material modification, in particular to a method for modifying MC nylon with flexible hydrogenated C9 petroleum resin. The modification method of the invention comprises the steps of adding caprolactam and flexible hydrogenated C9 petroleum resin into a reactor, heating and melting, then adding a catalyst, and reacting under vacuum. , then add the co-catalyst, stir evenly, quickly inject it into the preheated mold, place the mold with the reaction system in a drying box to carry out the polymerization reaction, cool and demould, and obtain the modified MC nylon. The invention uses the flexible hydrogenated C9 petroleum resin with light color, good thermal stability and toughness to modify the MC nylon product, which not only broadens the application field of the C9 petroleum resin, but also greatly improves the tensile strength of the MC nylon product. , Notched impact strength, water absorption and acid resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, in particular to a method for modifying MC nylon with flexible hydrogenated C9 petroleum resin. Background technique [0002] MC nylon (cast nylon, cast nylon) is a widely used high-performance engineering plastic with high molecular weight, high crystallinity, low polymerization temperature, good mechanical properties, self-lubrication, corrosion resistance, shock absorption and noise reduction and a wide range of applications. It can be made into gears, pulleys, sliders, high-pressure sealing rings, electrical connectors, bearings, bearing bushes, cages, etc., and is gradually replacing steel, iron, aluminum and other metal materials, and is widely used in machinery, automobiles, petrochemicals, National defense, medical and other industries, but MC nylon also has shortcomings such as poor acid resistance, low low temperature impact strength and high water absorption, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/14C08G69/16C08F289/00C08F222/14C08F8/04
CPCC08G69/14C08G69/16C08F289/00C08F8/04C08F222/14Y02P20/10
Inventor 李爱元孙向东王斌彭振博张慧波苏倡洪啸虎顾潇
Owner NINGBO POLYTECHNIC