Cold tolerant, shock resistant polyamide compoiste material in high intensity and its producing process

A technology of high-strength polyamide and composite materials, applied in the field of cold-resistant, impact-resistant and high-strength polyamide composite materials and their manufacturing, can solve the problems of cracking, impact and rigidity decline, and rigidity phase decline in products, and achieve Enhanced bond strength, improved toughness, and reduced manufacturing costs

Inactive Publication Date: 2005-10-26
SHANGHAI PLASTIC PROD NO 18 PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In modern technology, polyamide is a widely used engineering plastic with good physical and mechanical properties and impact toughness. However, at low temperature, polyamide, like other non-modified plastics, has its own The performance is greatly reduced, such as the product is prone to cracking, and the impact and rigidity are significantly reduced at the same time, which affects its use in low-temperature areas or low-temperature fields. For decades, various high-strength, high-impact or functional polyamide composite materials It has been researched and developed one after another at home and abroad, and there are countless patents and technical materials reported, but the results of its research focus o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Antioxidant namely tetrakis [β-(3,5-di-tert-butyl-4'-hydroxyphenyl) propionic acid] pentaerythritol ester and compound coupling agent namely aminopropyltriethoxysilane and isopropyl The organic solution of triisostearoyl titanate dissolved in alcohol (the concentration is 10%, and the consumption is SiO 2 5% by weight) treated SiO 2 Composite material 3kg, add 10kg water, stir and disperse the water dispersion liquid obtained. Take 10kgε-caprolactam and add 1.6kg of water to heat up to 80°C to melt, and then SiO 2 The aqueous dispersion of the solution is put into the melted caprolactam melt to form SiO 2 - caprolactam monomer mother liquor, SiO 2 - Add caprolactam monomer mother liquor to 90kg caprolactam melt, stir evenly, press into the polymerization kettle and heat up to 210°C, heat preservation and pressure for 2 hours, depressurize for 4 hours, raise the temperature to 270°C and vacuum for 1 hour, pressurize (Nitrogen-filled) discharge, injection tape cutting...

Embodiment 2-6

[0029] Operation method and process control are the same as embodiment 1, change SiO 2 The amount of the toughening agent EPDM is unchanged, and the specific data are shown in Table 1.

[0030] The cold-resistant and impact-resistant high-strength polyamide composite material is injection-molded under the following conditions, and the test sample is prepared. The following test method is used for the test, and its technical indicators will reach those shown in Table 1.

[0031] Injection conditions:

[0032] Cylinder temperature: front section 240~285℃

[0033] Middle section 240~285℃

[0034] Back stage 240~275℃

[0035] Injection pressure: 6 ~ 9.0Mpa

[0036] Holding time ≥ 6 seconds

[0037] Cooling time ≥ 30 seconds

[0038] Test Methods:

[0039] Notched Impact Strength: GB 1043-1993 Hard Plastic Charpy Impact Test Method

[0040] Compressive Strength: GB 1041-1992 Test Method for Compressive Properties of Plastics...

example 7-9

[0045] Operation method and process control are the same as embodiment 1, SiO 2 The amount of the toughening agent EPDM is unchanged, and the amount of the toughening agent EPDM is changed. The specific data are shown in Table 2

[0046] Reality

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PUM

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Abstract

The present invention discloses a cold-resisting impact-resisting and high-strength polyamide composite material and its preparation method. Its composition includes (by weight portion) 100 portions of polyamide monomer, 0.05-1 portion of surfactant, 1-5 portions of SiO2 monomer, 20 portions of dispersion medium and 5-15 portions of toughening agent, in which the polyamide monomer is xi-capralactam or adipic acid hexamethylene diamine salt, dispersion medium is water, the toughening agent is modified EVA or POE or EPDM toughening agent. Besides, said invention also provides the concrete composition of said composite surfactant.

Description

Technical field [0001] The invention relates to a cold-resistant, impact-resistant and high-strength polyamide composite material and a manufacturing method thereof. Background technique [0002] In modern technology, polyamide is a widely used engineering plastic with good physical and mechanical properties and impact toughness. However, at low temperature, polyamide, like other non-modified plastics, has its own The performance is greatly reduced, such as the product is prone to cracking, and the impact and rigidity are significantly reduced at the same time, which affects its use in low-temperature areas or low-temperature fields. For decades, various high-strength, high-impact or functional polyamide composite materials It has been researched and developed one after another at home and abroad, and there are countless patents and technical materials reported, but the results of its research focus on improving rigidity or toughness alone, and reports that can improve both ...

Claims

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Application Information

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IPC IPC(8): C08L67/04
Inventor 夏灵陈耀华吉莉娟张榕生奚文义
Owner SHANGHAI PLASTIC PROD NO 18 PLANT
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