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Modified monomer cast nylon and preparation method thereof

A casting nylon and modification technology, which is applied in the field of modified casting nylon and its preparation, can solve the problems of affecting the polymerization of casting nylon, having little influence on the wear resistance of casting nylon, and requiring high wear resistance, etc. Balanced distribution of wear resistance and flame retardant properties, improved wear resistance and flame retardant properties, and adequate mixing of materials

Inactive Publication Date: 2016-12-07
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary cast nylon, although its overall performance is good, but its wear resistance and flame retardancy are not good. There are great restrictions, especially in special working conditions (such as engineering cranes and automobile steering systems have high requirements on the wear resistance of cast nylon materials; locomotive interiors and mining fields have high requirements on the flame retardancy of cast nylon materials The requirements are very high), ordinary cast nylon can no longer meet the requirements of the above special working conditions, and it is necessary to modify the cast nylon
[0003] At present, the modification of cast nylon is mainly to improve the wear resistance of the material by adding wear-resistant agents such as molybdenum disulfide and graphite, but this method has little effect on the wear resistance of cast nylon, and the friction coefficient of the material The improvement of wear and tear is limited; at present, the flame retardancy of cast nylon is improved by adding flame retardants such as red phosphorus and halogen-containing flame retardants, but this method will affect the polymerization of cast nylon and have a relatively small impact on the mechanical properties of cast nylon Big
Therefore, the current modification methods for cast nylon are difficult to ensure that it has excellent wear resistance and flame retardancy.

Method used

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  • Modified monomer cast nylon and preparation method thereof

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Effect test

Embodiment 1

[0029] A modified cast nylon of the present invention is mainly formed by in-situ polymerization of 100Kg caprolactam, 4Kg caprolactam magnesium bromide, 1Kg N-acetyl caprolactam and 0.5Kg polyether ketone.

[0030] The preparation method of the modified cast nylon of the present embodiment comprises the following steps:

[0031] (1) Divide 100Kg caprolactam into 2 parts of equal weight, add them to the reactors A and B of the casting nylon equipment respectively, evacuate to about 0.1MPa (97725-101025Pa), then heat and melt, and dehydrate at 125°C for 10min After that, stop vacuuming;

[0032] (2) Open reactor A, add 4Kg of catalyst Grignard reagent caprolactam magnesium bromide, 0.5Kg polyether ketone (PEK), open reactor B while opening reactor A, add 1.0Kg of activation in reactor B N-acetyl caprolactam; then heat the two reactors, maintain the temperature of the two reactors at 125 ° C, vacuumize to a vacuum of about 0.1MPa (97725 ~ 101025Pa) and maintain for 10min, stop ...

Embodiment 2

[0036] A modified cast nylon of the present invention is mainly formed by in-situ polymerization of 95Kg caprolactam, 5Kg laurolactam, 5Kg JQ-1 glue, 1.5Kg caprolactam sodium salt and 5Kg polyether ether ketone.

[0037] The preparation method of the modified cast nylon of the present embodiment comprises the following steps:

[0038] (1) Mix 95Kg caprolactam and 5Kg laurolactam evenly, divide them into 2 parts of equal weight, add them to the A and B reactors of the casting nylon equipment, and evacuate to about 0.1MPa (97725-101025Pa), and then Heating and melting, after dehydration at 130°C for 20 minutes, stop vacuuming;

[0039] (2) Open reactor A, add 1.5Kg of catalyst caprolactam sodium salt, 5Kg polyether ether ketone (PEEK), open reactor B while opening reactor A, add 5Kg of activator JQ-1 to reactor B Then heat the two reactors, maintain the temperature of the two reactors at 130°C, vacuumize to a vacuum degree of about 0.1MPa (97725-101025Pa) and maintain it for 20...

Embodiment 3

[0043] A modified cast nylon of the present invention, mainly composed of 95Kg caprolactam, 5Kg laurolactam, 0.16Kg sodium hydroxide, 0.4Kg MDI (diphenylmethane diisocyanate) and 10Kg containing phthalazinyl biphenyl structural novel Polyaryl ether sulfone ketone is polymerized in situ.

[0044] The preparation method of the modified cast nylon of the present embodiment comprises the following steps:

[0045] (1) Mix 95Kg caprolactam and 5Kg laurolactam evenly, divide them into 2 parts of equal weight, add them to the A and B reactors of the casting nylon equipment, and evacuate to about 0.1MPa (97725-101025Pa), and then Heating and melting, after dehydration at 140°C for 15 minutes, stop vacuuming;

[0046](2) Open reactor A, add catalyst sodium hydroxide of 0.16Kg, 10Kg containing the novel polyaryl ether sulfone ketone (PPESK) of naphthyl biphenyl structure, open reactor B while opening reactor A, to reactor Add 0.4Kg of activator MDI to B; then heat the two reactors, kee...

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Abstract

The invention discloses modified monomer cast nylon. The modified monomer cast nylon is mainly prepared from, by weight, 100 parts of amide monomers, 0.01-5 parts of a catalyst, 0.01-5 parts of an activating agent, 0.01-30 parts of polyether-ether-ketone or / and polyether-ether-ketone derivatives in an in-situ polymerization mode. The preparation method comprises the following steps that 1, the amide monomer is added into reaction kettles A and B in an equal weighing mode, and heating fusion and dehydration are performed under a vacuum condition; 2, a catalyst, polyether-ether-ketone or / and polyether-ether-ketone derivatives are added into the reaction kettle A, the activating agent is added into the reaction kettle B, and then the reaction kettles are heated and vacuumized; 3, materials in the reaction kettles A and B are mixed to be uniform and poured into a mold to be polymerized into a workblank; 4, the workblank is subjected to postprocessing, and the modified monomer cast nylon is obtained. The preparation method will not affect polymerization of the cast nylon, the mechanical property is affected slightly, and the abrasion resistance and fire resistance of the cast nylon can also be improved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a modified cast nylon and a preparation method thereof. Background technique [0002] Cast nylon is a new type of engineering plastic with low polymerization temperature, simple process, high crystallinity, large molecular weight (70,000-100,000) and uniform distribution, low density, good mechanical properties, wide temperature range and excellent mechanical properties. And other characteristics, and has good dimensional stability and corrosion resistance, it is widely used in the fields of automobile, engineering machinery, petrochemical, textile, mining and so on. Ordinary cast nylon, although its overall performance is good, but its wear resistance and flame retardancy are not good. There are great restrictions, especially in special working conditions (such as engineering cranes and automobile steering systems have high requirements on the wear resistance of cast nylon mate...

Claims

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Application Information

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IPC IPC(8): C08G69/40
CPCC08G69/40
Inventor 郑梯和刘爱学谭玉宝杨海洋黄安民王全兵
Owner ZHUZHOU TIMES NEW MATERIALS TECH