Hydrolysis and alcoholysis resistant modified nylon 66 material for automotive water chamber and preparation method of modified nylon 66 material

A modified nylon and hydrolysis-resistant technology, applied in the field of polymer materials, can solve the problems of poor compatibility between graphene and nylon, reduced binding force, poor injection molding performance, etc., achieve good dimensional stability, improve tensile properties, and facilitate Processing effect

Inactive Publication Date: 2018-12-07
NINGBO EAGLE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between graphene and nylon is poor, and with the addition of components such as wear-resistant agents, thermally conductive fillers and flame retardants, the binding force of each component in the composite material is reduced, resulting in the granulation of components in the actual production process. Uneven, poor injection performance

Method used

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  • Hydrolysis and alcoholysis resistant modified nylon 66 material for automotive water chamber and preparation method of modified nylon 66 material
  • Hydrolysis and alcoholysis resistant modified nylon 66 material for automotive water chamber and preparation method of modified nylon 66 material
  • Hydrolysis and alcoholysis resistant modified nylon 66 material for automotive water chamber and preparation method of modified nylon 66 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A modified nylon 66 material resistant to hydrolysis and alcoholysis for an automobile water tank, the raw materials of which are as follows and are calculated in parts by mass,

[0052] Nylon 66 100-120 parts,

[0053] Enhancer 48-72 parts,

[0054] Water blocking agent 9-18 parts,

[0055] Antioxidant 0.4-4 parts,

[0056] Silane coupling agent 0.5-1 part.

[0057] Wherein the reinforcing agent is 40-60 parts of glass fiber and 8-12 parts of silicon dioxide nanoparticles. The glass fiber is one or both of short glass fiber and non-alkali short glass fiber. This time it is non-alkali short glass fiber, which is a commercially available product purchased from Jushi Group with the article number JSWX021. The silicon dioxide nanoparticles are fumed nano silicon dioxide, which is a commercially available product HL-380 fumed white carbon black purchased from Yichang Huifu Silicon Material Co., Ltd. The water blocking agent is 6-10 parts of fluorinated graphene and 3-8...

Embodiment 2

[0082] A modified nylon 66 material resistant to hydrolysis and alcoholysis for automobile water tanks, improved on the basis of Example 1, its silane crosslinking agent is a chlorosilane containing a fluoroalkyl group, where the chlorosilane containing a fluoroalkyl group Use (3,3,3-trifluoropropyl)trichlorosilane. According to the preparation method in Example 1 and the raw material ratio of Examples 1A-1E, the modified nylon 66 material was prepared to obtain Examples 2A-2E. And the modified nylon 66 material prepared in Examples 2A-2E was tested, and the test results were as follows.

[0083] 1. No hydrolysis and alcoholysis.

[0084]

[0085] 2. After the hydrolysis of the mixed solution of ethylene glycol and water with a mass ratio of 1:1.

[0086]

[0087] It can be seen from the above that the hydrolysis and alcoholysis resistance, physical properties and dimensional stability of the modified nylon 66 plastics are improved by using chlorosilanes containing flu...

Embodiment 3

[0089] A modified nylon 66 material resistant to hydrolysis and alcoholysis for an automobile water tank, improved on the basis of Example 2, the antioxidant includes 0.2-2 parts of phosphite, and the phosphite is tris(nonylphenol)phosphorous acid Any of esters, tri-isooctyl phosphite and tris(2,4-di-tert-butylphenyl) phosphite.

[0090] According to the preparation method of Example 1, the modified nylon 66 material was prepared to obtain Examples 3A-3E, and the specific raw material dosage parameters are as follows.

[0091]

[0092]

[0093]The modified nylon 66 materials obtained in Examples 3A-3E were subjected to mechanical property tests, dimensional stability tests, and hydrolysis and alcoholysis resistance tests.

[0094] 1. No hydrolysis and alcoholysis.

[0095]

[0096] 2. After the hydrolysis of the mixed solution of ethylene glycol and water with a mass ratio of 1:1.

[0097]

[0098] It can be seen from the above that phosphite, as a good antioxida...

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Abstract

The invention relates to modified nylon materials and discloses a hydrolysis and alcoholysis resistant modified nylon 66 material for an automotive water chamber and a preparation method of the modified nylon 66 material. The modified nylon 66 material comprises the following raw materials: 100-120 parts of nylon 66, 48-72 parts of an enhancer, 9-18 parts of a water resistance agent, 0.4-4 parts of an antioxidant and 0.5-1 part of a silane coupling agent, wherein the enhancer comprises 40-60 parts of glass fibers; and the water resistance agent comprises 6-10 parts of fluorinated graphene and3-8 parts of a styrene-vinyl phenol copolymer. The preparation method comprises the following steps: weighing the raw materials in parts by mass, mixing after drying, adding the mixture into a screw extruder, heating and melting, and performing extrusion pelletizing, thereby obtaining the modified nylon 66 material. The tensile property and bending performance of the modified nylon 66 material areimproved, and the nylon material has hydrolysis and alcoholysis resistance and excellent dimensional stability, difficultly causes size distortion at a high temperature and meets the service conditions and environment of the automotive water chamber.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a hydrolysis-alcoholysis-resistant modified nylon 66 material for automobile water tanks and a preparation method thereof. Background technique [0002] With the development trend of automobile lightweight, the proportion of plastics in automobiles is increasing. The plasticization of automobiles has become a major development trend in today's automobile manufacturing industry. The demand of the automobile market has shifted to lighter sports cars, Utility vehicles and other light vehicles, which also promotes the development of engineering plastics such as nylon to better performance. The car water chamber is used as the heat dissipation device of the car, and the coolant must pass through and alternate between high and low temperature. During this process, the plastic material in the water tank of the automobile is damaged by the coolant, which is reflected in the thermal degr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L25/08C08K13/06C08K3/04C08K7/14C08K5/526C08K3/36
CPCC08K2201/011C08L77/06C08L25/08C08K13/06C08K3/04C08K7/14C08K5/526C08K3/36
Inventor 陆建华姚虎威
Owner NINGBO EAGLE NEW MATERIAL
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