Special material for high-fluidity high-temperature polyamide heat-insulation strip and preparation method of material

A technology of high-temperature polyamide and high fluidity, applied in the field of heat-insulating strip materials, can solve the problems of poor dimensional stability of heat-insulating strip materials, poor high-temperature resistance of additives, poor melt flow, etc., and achieve dimensional stability Good, good chemical corrosion resistance, the effect of optimizing the extrusion process conditions

Active Publication Date: 2015-04-08
JIANGMEN YOUJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The toughness of PA66 is relatively good, but it is sensitive to the gap, resulting in poor impact resistance; the water absorption of PA66 is relatively high, which results in poor dimensional stability of the insulation strip material made of it
Glass fiber needs to be added when using PA66. Due to the addition of glass fiber, the flow of the melt is not good and extrusion is difficult.
If you want to extrude smoothly, you need to increase the extrusion temperature, but because some additives are not strong in high temperature resistance, it will cause the decomposition of additives and lead to their failure

Method used

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  • Special material for high-fluidity high-temperature polyamide heat-insulation strip and preparation method of material
  • Special material for high-fluidity high-temperature polyamide heat-insulation strip and preparation method of material
  • Special material for high-fluidity high-temperature polyamide heat-insulation strip and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Synthesis of high fluidity high temperature nylon resin

[0024] Add 35 parts of nylon 6T salt, 30 parts of nylon 66 salt, and 1 part of diethylenetriamine into deionized water, and then add 2 parts of end-capping agent. After purging with nitrogen, increase the pressure of the reaction system to 3.2 MPa, raise the temperature to 240°C, and then Keep it for 10 hours, carry out copolymerization, and obtain a prepolymer; then, under a nitrogen atmosphere, at a temperature of 240°C, react for 5 hours, and perform a solid-state reaction to increase viscosity, thereby obtaining a high-fluidity high-temperature nylon with a relative viscosity of 2.6 and a melting point of 270°C .

[0025] (2) Preparation of special materials for heat insulation strips

[0026] Dry 74wt% high-fluidity high-temperature nylon and 1wt% black high-temperature nylon masterbatch in a blast oven at 100°C for 12 hours, and dry 23.5wt% glass fiber pretreated with 0.5wt% fiber treatment agent at 80...

Embodiment 2

[0028] (1) Synthesis of high fluidity high temperature nylon resin

[0029] Add 40 parts of nylon 6T salt, 5 parts of nylon 9T salt, 30 parts of nylon 66 salt, and 2 parts of triaminotriphenylmethane into deionized water, then add 2 parts of end-capping agent, and after purging with nitrogen, increase the pressure of the reaction system to 3.0MPa, raise the temperature to 235°C, and then keep it for 5h to carry out copolymerization to obtain a prepolymer; then under vacuum conditions, the temperature is 180°C, react for 15h, and carry out solid phase reaction to increase viscosity, thereby obtaining high-fluidity high-temperature nylon, which is relatively The viscosity is 2.8 and the melting point is 285°C.

[0030] (2) Preparation of special materials for heat insulation strips

[0031] Dry 72wt% high-fluidity high-temperature nylon and 2wt% black high-temperature nylon masterbatch in a blast oven at 100°C for 12 hours, and dry 23wt% glass fiber pretreated with 1wt% fiber t...

Embodiment 3

[0033] (1) Synthesis of high fluidity high temperature nylon resin

[0034] Add 30 parts of nylon 6T salt, 30 parts of nylon 66 salt, and 0.5 part of triethylenetetramine into deionized water, then add 2 parts of catalyst, after purging with nitrogen, increase the pressure of the reaction system to 4.0 MPa, raise the temperature to 250°C, and then keep it for 8 hours , to carry out copolymerization to obtain a prepolymer; then under vacuum conditions, the temperature is 200 ° C, react for 8 hours, and carry out solid phase reaction to increase viscosity, thereby obtaining high-fluidity high-temperature nylon with a relative viscosity of 2.5 and a melting point of 300 ° C.

[0035] (2) Preparation of special materials for heat insulation strips

[0036] Dry 77.5wt% high-fluidity high-temperature nylon and 0.1wt% black high-temperature nylon masterbatch in a blast oven at 100°C for 12 hours, and dry 22wt% glass fiber pretreated with 0.05wt% fiber treatment agent at 80°C After d...

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Abstract

The invention discloses a special material for a composite glass fiber heat-insulation strip using high-fluidity high-temperature nylon resin as a matrix. The material comprises the following components: 72-77.5wt% of high-fluidity high-temperature nylon, 22-27.5wt% of glass fiber, 0.05-1wt% of a fiber treating agent, 0.1-2wt% of a coloring agent, 0.1-1wt% of an antioxidant, 0.05-1wt% of a plasticizer, 0.05-1wt% of a coupling agent and 0.1-1wt% of additives. The invention also discloses a polymerization method of high-fluidity high-temperature nylon and a preparation method of the special material for the heat-insulation strip. Since a melt of the high-temperature nylon adopted in the material has good fluidity so that the process is simple, the energy consumption can be reduced, the cost conservation is achieved, the added aid is protected from being decomposed at a high temperature to cause failure and meanwhile, the prepared special material for the heat-insulation strip has excellent performance, high strength and good dimensional stability and the excellent performance can be still maintained at large temperature difference.

Description

technical field [0001] The invention relates to a heat-insulating strip material, in particular to a high-fluidity high-temperature polyamide heat-insulating strip special material and a preparation method thereof. Background technique [0002] The heat insulation strip material is the core component of the strip heat insulation profile. It is not only a "broken bridge" on the heat transfer path in the aluminum profile, which can reduce the heat transfer in the aluminum profile; Structural connector, through which the connection of the three parts of the insulating profile becomes a whole and bears the load together. At present, the thermal insulation strip material of broken bridge aluminum alloy doors and windows is made of PA (polyamide, commonly known as nylon) as the base material and added with glass fiber for extrusion. [0003] PA heat insulation strip material has the characteristics of high tensile strength (PA heat insulation strip material: ≥126N / mm), high therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08K7/14C08J5/08B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08G69/16C08G69/30C08J5/08C08J2377/06C08J2477/00C08L77/06C08L2201/08C08L77/00C08K13/06C08K9/00C08K7/14
Inventor 王贤文江友飞黎昱
Owner JIANGMEN YOUJU NEW MATERIALS
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