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Method for preparing glass fiber reinforced nylon through in-situ polymerization, glass fiber reinforced nylon prepared by method

An in-situ polymerization and glass fiber technology, which is applied in the field of glass fiber reinforced nylon, can solve the problems of secondary pollution, expensive processing of copper shell water meters, etc., and achieve the goals of reducing water absorption, improving "floating fiber" problems, and excellent hydrolysis resistance Effect

Inactive Publication Date: 2020-01-10
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nylon water meter cases can effectively solve the problems of secondary pollution of water meters and expensive processing of copper shell water meters. Therefore, the development of water meter case materials that use plastic instead of copper and plastic strip steel has become an inevitable trend in the industrialization of water meters.

Method used

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  • Method for preparing glass fiber reinforced nylon through in-situ polymerization, glass fiber reinforced nylon prepared by method
  • Method for preparing glass fiber reinforced nylon through in-situ polymerization, glass fiber reinforced nylon prepared by method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: Add 90 parts by weight of caprolactam, 10 parts by weight of glass fibers, 10 parts by weight of water, 0.5 parts by weight of phosphorous acid, 0.3 parts by weight of 1098 antioxidant in a stainless steel reactor with jacketed coil pipe and agitator , 3 parts by weight of polyolefin thermoplastic elastomer, 0.2 parts by weight of silicone powder and 0.5 parts by weight of polycarbodiimide. ① Check the airtightness of the reactor, vacuumize and replace the air in the reactor with high-purity inert gas, and try to control the oxygen content in the reactor below 0.005wt%. ②Salt formation: raise the temperature to 90°C, and react under this condition for 1h to carry out the salt formation reaction; ③Prepolymerization: After completing the salt formation stage, raise the temperature to 190°C, and react for 3h at a pressure of 0.6MPa. ④ Final polymerization: After the prepolymerization stage is completed, the temperature is raised to 250°C, and the pressure is ...

Embodiment 2

[0023] Embodiment 2: Add 80 parts by weight of caprolactam, 20 parts by weight of glass fibers, 10 parts by weight of water, 0.5 parts by weight of phosphorous acid, 0.3 parts by weight of 1098 antioxidant in the stainless steel reactor with jacketed coil pipe and stirrer , 3 parts by weight of polyolefin thermoplastic elastomer, 0.2 parts by weight of silicone powder and 0.5 parts by weight of polycarbodiimide. ① Check the airtightness of the reactor, vacuumize and replace the air in the reactor with high-purity inert gas, and try to control the oxygen content in the reactor below 0.005wt%. ②Salt formation: raise the temperature to 90°C, and react under this condition for 1h to carry out the salt formation reaction; ③Prepolymerization: After completing the salt formation stage, raise the temperature to 190°C, and react for 3h at a pressure of 0.6MPa. ④ Final polymerization: After the prepolymerization stage is completed, the temperature is raised to 250°C, and the pressure is...

Embodiment 3

[0024] Embodiment 3: Add 70 parts by weight of caprolactam, 30 parts by weight of glass fibers, 10 parts by weight of water, 0.5 parts by weight of phosphorous acid, 0.3 parts by weight of 1098 antioxidant in the stainless steel reactor with jacketed coil pipe and stirrer , 3 parts by weight of polyolefin thermoplastic elastomer, 0.2 parts by weight of silicone powder and 0.5 parts by weight of polycarbodiimide. ① Check the airtightness of the reactor, vacuumize and replace the air in the reactor with high-purity inert gas, and try to control the oxygen content in the reactor below 0.005wt%. ②Salt formation: raise the temperature to 90°C, and react under this condition for 1h to carry out the salt formation reaction; ③Prepolymerization: After completing the salt formation stage, raise the temperature to 190°C, and react for 3h at a pressure of 0.6MPa. ④ Final polymerization: After the prepolymerization stage is completed, the temperature is raised to 250°C, and the pressure is...

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Abstract

The invention relates to a method for preparing glass fiber reinforced nylon through in-situ polymerization, the glass fiber reinforced nylon prepared by the method, and uses of the glass fiber reinforced nylon in preparation of intelligent water meter shells. The method comprises: (1) weighing 70-90 parts by weight of a mixture of diamine and dibasic acid or caprolactam, 10-30 parts by weight ofglass fibers, 1-50 parts by weight of water, 0.1-1 part by weight of a catalyst, 0.1-1 part by weight of an antioxidant, 0.5-5 parts by weight of a toughening agent and 0.1-1 part by weight of a lubricant according to a certain ratio; (2) adding various components into a high-pressure polymerization reaction kettle with a jacketed coil pipe; (3) carrying out a salt forming reaction; (4) carrying out a pre-polymerization reaction; (5) carrying out a final polymerization reaction; (6) carrying out a tackifying reaction; and (7) pelletizing.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a method for preparing glass fiber reinforced nylon by in-situ polymerization and the glass fiber reinforced nylon prepared by the method, and the glass fiber reinforced nylon can be used to prepare smart water meter cases. Background technique [0002] A water meter is a test instrument for measuring water consumption. It generally measures the total amount of water passing through the pipeline. Its internal structure can be divided into three parts: shell, sleeve and movement from the outside to the inside. At present, the shell materials of water meters are mainly made of stainless steel, brass, ductile cast iron, gray cast iron and plastics. For the stainless steel shell, although it meets the national drinking water hygiene requirements, its production cost is high and it is not easy to process, so it is not easy to mass produce. For the bra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08G69/14C08G69/28C08G69/26C08K7/14C08L77/02C08L77/06
CPCC08G69/14C08G69/16C08G69/26C08G69/28C08K7/14C08L77/02C08L77/06
Inventor 王国利陈亚宁陈西波张新平党伟荣
Owner BEIJING RISUN TECH CO LTD
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