A polyamide material with stable melt and chloride solution resistance and preparation method thereof

A chloride and polyamide technology, which is applied in the field of polyamide materials and its preparation, can solve the problems of unstable melt, adverse effects of stable mechanical properties of materials, poor resistance to calcium chloride, etc., and achieve excellent resistance to chloride salts Corrosion, improve the strength of the resin solution, and stabilize the production and processing process

Active Publication Date: 2018-02-13
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calcium chloride resistance of the obtained polyamide material is poor and cannot meet the requirements of practical applications; in addition, direct blending of short-chain and long-chain polyamides is prone to melt instability, which affects the granulation-injection molding process or the mechanical properties of the material. adverse effects on stability
[0005] However, there is no report about a kind of polyamide material with stable melt and chloride solution resistance and its preparation method.

Method used

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  • A polyamide material with stable melt and chloride solution resistance and preparation method thereof
  • A polyamide material with stable melt and chloride solution resistance and preparation method thereof
  • A polyamide material with stable melt and chloride solution resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dry nylon at 110°C for 2 hours.

[0039] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-20000), 10 parts of PA610 (relative molecular weight 6000-10000), and premix 0.5 parts of epoxy-terminated polybutadiene evenly, then add 0.3 parts of antioxidant and lubricating Add 0.3 parts of the agent into the premix and mix into a homogeneous mixture;

[0040] (3) Add the mixture from the first barrel of the twin-screw extruder, add 10 parts of glass fiber through the glass fiber port, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion and granulation. After being extruded, it is pelletized with supercooled water.

[0041] (4) Dry the cut particles and inject them into molds at 260-275°C. test.

Embodiment 2

[0043] (1) Dry the nylon at 110°C for 2 hours.

[0044] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-30000), 45 parts of PA610 (relative molecular weight 6000-18000), premix 3 parts of epoxy-terminated polybutadiene, and then add 1.2 parts of antioxidant and lubricating Mix 2 parts of the agent into the premix and mix into a homogeneous mixture;

[0045] (3) Add the mixture from the first barrel of the twin-screw extruder, add 50 parts of glass fiber from the second glass fiber port, control the rotation speed at 1100r / min, and the temperature at 260-270°C to carry out extrusion granulation, After the material is extruded, it is pelletized by subcooling water.

[0046] (4) Dry the cut particles and inject them into molds at 260-275°C. test.

Embodiment 3

[0048] (1) Dry nylon at 110°C for 2 hours.

[0049] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-30000), 20 parts of PA610 (relative molecular weight 6000-10000), and premix 1.5 parts of epoxy-terminated polybutadiene, and then mix 0.7 parts of antioxidant and lubricating Add 1.4 parts of the agent into the premix and mix into a homogeneous mixture;

[0050] (3) Add the mixture from the first barrel of the twin-screw extruder, add 30 parts of glass fiber from the fourth barrel, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion granulation , After the material is extruded, it is pelletized by subcooling water.

[0051] (4) Dry the cut particles and inject them into molds at 260-275°C. test.

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Abstract

The invention relates to a polyamide material with stable melt and anti-chloride solution feature and a preparation method thereof. The polyamide material consists of the following components in parts by weight: 100 parts of nylon 66, 10-45 parts of long-chain nylon, 10-50 parts of glass fiber, 0.5-3 parts of liquid melting enhancer, 0.3-1.2 parts of antioxidant and 0.3-2 parts of lubricant. The preparation method comprises the following steps: uniformly premixing the nylon 66, long-chain nylon and liquid melting enhancer; adding the antioxidant and lubricant and mixing again, and adding the mixture through a main feed port of a twin-screw extruder; adding the glass fiber through a glass fiber port, wherein the rotation speed is controlled at 800-1200r / min and the temperature is controlled at 250-285 DEG C; and performing extrusion granulation to obtain the polyamide material. The material has excellent mechanical property, melt stability, chloride ion corrosion resistance and static pressure resistance and is particularly suitable for water supply components with relatively high requirement on chemical corrosion resistance such as high-pressure water guns, high-pressure water pipes, shower heads and spray heads.

Description

technical field [0001] The invention relates to the technical field of glass fiber reinforced nylon composite materials, in particular to a polyamide material with stable melt and chloride solution resistance and a preparation method thereof. Background technique [0002] Nylon is one of the five major engineering plastics. It has excellent mechanical properties, wear resistance, thermal stability and fatigue resistance, and is widely used in automobiles, electrical appliances, mechanical parts and other fields. But at the same time, nylon also has disadvantages such as strong hygroscopicity and poor impact resistance, especially the deviation in tolerance to chloride salts (calcium chloride, zinc chloride, etc.). Chloride salt is the main component of snow-melting agent, and it is mostly used on snowy roads in the north to prevent roads from freezing and cars from skidding. Once nylon is in contact with snow-melting agent, its mechanical properties will be greatly reduced, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08L47/00C08K9/00C08K7/14
CPCC08K2201/003C08L77/06C08L2205/025C08L2205/03C08L47/00C08K9/00C08K7/14
Inventor 周军杰张强陈光伟孟成铭杨涛陈晓东
Owner 上海日之升科技有限公司
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