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Modified MC nylon

A modified nylon technology, which is applied in the field of polymer synthesis and modified processing, can solve the problems of unstable elongation at break, large linear expansion coefficient, and low impact strength, and achieve less monomer content, small friction coefficient, The effect of high impact strength

Inactive Publication Date: 2013-08-07
QIQIHAR NORTH KUN SYNTHETIC POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of nylon materials such as uneven material, low tensile strength, low impact strength, unstable elongation at break, and large linear expansion coefficient, the invention has developed the polymerization and processing technology of modified MC nylon

Method used

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Effect test

specific Embodiment approach 1

[0016] Melt 100g of caprolactam at 130°C completely, distill off the water under reduced pressure, add 0.2g of NaOH, 0.6g of triamine methylphosphate and N-benzoyl caprolactam, and 10g of montmorillonite and 5g of liquid polybutylene to the system ethylene, injected into the mold for rapid polymerization molding. Then use the method of thermal demoulding, heat treatment in transformer oil at 150 ℃ to relieve stress, the time is about 15min / mm thickness, and the casting is cooled slowly after the heat treatment.

specific Embodiment approach 2

[0017] Melt 100g caprolactam completely at 110°C, distill off moisture under reduced pressure, add 0.1g sodium hydride, 0.8g methyl phosphate triamine and acetyl caprolactam, 6g fly ash, 4g attapulgite and 7g poly Ethylene oxide, injected into the mold for rapid polymerization. Then use the method of thermal demoulding, heat treatment in transformer oil at 130°C to relieve stress, the time is about 30min / mm thickness, and the casting is cooled slowly after the heat treatment.

specific Embodiment approach 3

[0018] Melt 100g caprolactam completely at 150°C, distill off water under reduced pressure, add 0.3g sodium methoxide, 1.0g diphenylmethane diisocyanate and 3g kaolin, 5g mica, 4g polyurethane to the system, and inject it into the mold for rapid polymerization forming. Then use the method of thermal demoulding, heat treatment in transformer oil at 160°C to relieve stress, the time is about 20min / mm thickness, and the casting is cooled slowly after the heat treatment.

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Abstract

The invention relates to modified MC nylon which is characterized in that: caprolactam is adopted as a raw material; a catalyst and an activating agent are added under special conditions; with a series of special combined modification technologies such as strengthening and toughening, and with mold direct injection, fast polymerization molding, and hot de-molding methods, a series of modified MC nylon materials is produced. According to the invention, on a basis of reduced reaction temperature and reduced reaction time, stable high-molecular-weight modified MC nylon material can be obtained. A product linear expansion coefficient is reduced ((3-5)*10<-5>), a product elongation at break is 37-40%, and a product tensile strength is 72-75MPa. The modified MC nylon product has good strength, good toughness, and good cold hardiness. The product has excellent dimensional stability and precise performance indexes. The modified MC nylon provided by the invention can be widely applied in the fields such as military industry, metallurgy, mining, textile, chemicals, papermaking, power energy, petroleum machinery, and the like.

Description

technical field [0001] The invention relates to a modified MC nylon material, which relates to the fields of polymer synthesis and modification processing. The prepared modified MC nylon material has stable elongation at break and tensile strength, precise technical indicators, and outstanding performance in military and other enterprises. Background technique [0002] Nylon is a thermoplastic, crystalline, and hygroscopic polymer material with special chemical and physical properties. It is widely used in various fields of social production and is the first of the five major engineering materials. However, due to some long-term shortcomings such as easy water absorption, poor light resistance, strict design requirements, low tensile strength, and low thermal expansion coefficient, the scope of application is limited. Usually, the manufacture of nylon 6 in the industry is to melt the monomer caprolactam, add a small amount of water (or alcohol) and stabilizers such as organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/20C08K13/02C08K13/04C08K5/29C08K5/3412C08K5/5399C08L77/02
Inventor 袁浩杰李玉峰蔡淑清
Owner QIQIHAR NORTH KUN SYNTHETIC POLYMER MATERIALS
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