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High-temperature resistant and high-strength type casting nylon 6 composite material and preparation method thereof

A technology of casting nylon and composite materials, which is applied in the field of casting nylon modification, to achieve the effects of simple operation process, superior performance, and improved heat resistance and mechanical strength

Active Publication Date: 2013-04-03
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has certain defects in heat resistance and mechanical strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Weigh 100 parts by weight of polycaprolactam, place it in a reaction vessel, and heat it to melt under the protection of nitrogen atmosphere;

[0035] (2) Vacuum dehydration of (1) molten polycaprolactam at 120°C for 10 minutes;

[0036] (3) Take 2 parts by weight of diatomaceous earth and place it in 10% γ-aminopropyltriethoxysilane (KH550) methanol solution for surface treatment for 10 minutes;

[0037] (4) Adding diatomite treated in (3) to caprolactam after dehydration treatment in (2) under the protection of nitrogen atmosphere, and ultrasonically dispersing to prepare diatomite suspension;

[0038] (5) Add 0.1 parts by weight of sodium hydroxide to the diatomite suspension, and vacuum dehydrate at 120°C for 20 minutes;

[0039] (6) Add 0.1 parts by weight of toluene diisocyanate to the dehydrated solution in (5) for mixing. After mixing evenly, quickly pour it into a mold preheated to 160°C. After thermal insulation polymerization for 25 minutes, cool and dem...

Embodiment 2

[0042] (1) Weigh 100 parts by weight of caprolactam, place it in a reaction vessel, and heat it to melt under the protection of nitrogen atmosphere;

[0043] (2) Vacuum dehydration of the above molten caprolactam at 120°C for 10 minutes;

[0044] (3) Take 4 parts by weight of diatomite and place it in 10% KH550 methanol solution for surface treatment for 10 minutes;

[0045] (4) Under the protection of a nitrogen atmosphere, the above-mentioned surface-treated diatomite is added to the dehydrated caprolactam in (2), and the diatomite suspension is prepared by ultrasonic dispersion;

[0046] (5) Add 0.1 parts by weight of sodium hydroxide to the diatomaceous earth suspension, and vacuum dehydrate at 135°C for 20 minutes;

[0047] (6) Add 0.1 parts by weight of toluene diisocyanate to the above-prepared solution, mix it evenly, and quickly pour it into a mold preheated to 160°C. After heat preservation and polymerization for 25 minutes, cool and demould at room temperature to o...

Embodiment 3

[0050] (1) Weigh 100 parts by weight of caprolactam, place it in a reaction vessel, and heat it to melt under the protection of nitrogen atmosphere;

[0051] (2) Vacuum dehydrate the above caprolactam at 130°C for 10 minutes;

[0052] (3) Take 6 parts by weight of diatomite and place it in 10% KH550 methanol solution for surface treatment for 10 minutes;

[0053] (4) Under the protection of a nitrogen atmosphere, the above-mentioned surface-treated diatomite is added to the dehydrated caprolactam in (2), and the diatomite suspension is prepared by ultrasonic dispersion;

[0054] (5) Add 0.3 parts by weight of sodium hydroxide to the diatomite suspension, and vacuum dehydrate at 135°C for 20 minutes;

[0055] (6) Add 0.2 parts by weight of toluene diisocyanate to the above-prepared solution, mix it evenly, and quickly pour it into a mold preheated to 160°C, heat-preserve polymerization for 25 minutes, and then cool and demould at room temperature to obtain a high-temperature-r...

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Abstract

The invention provides a high-temperature resistant and high-strength type casting nylon 6 composite material which comprises polycaprolactam, kieselguhr, a catalyst and an initiator; the kieselguhr provided with a special porous structure is adopted, and the anionic in-situ polymerization reaction of the polycaprolactam is carried out to prepare the casting nylon 6 composite material, so that the heat resistance and the mechanical strength of the casting nylon are greatly improved, and the heat deflection temperature, the tensile strength and the notched impact strength of the casting nylon are respectively up to 205 DEG C, 125 MPa and 13.2kJ / m<2>, respectively increased by 64%, 47% and 69%; and moreover, the operation process is simple, and the prepared composite material is excellent in performances and suitable for industrial production.

Description

[0001] technical field [0002] The invention relates to the technical field of cast nylon modification, in particular to a high-temperature-resistant, high-strength cast nylon 6 composite material and a preparation method thereof. Background technique [0003] Polyamide fiber is commonly known as nylon (Nylon), referred to as PA, with a density of 1.15 g / cm3. It is a general term for thermoplastic resins containing repeated amide groups [NHCO] on the main molecular chain. Polyamide 6 (polycaprolactam) is one of the most common polyamide fibers, also known as nylon 6. It has a low melting point and a wide range of process temperatures. Its impact resistance and solvent resistance are better than nylon 66 plastics. Cast nylon 6 is a kind of nylon 6 prepared by anionic polymerization. It is widely used in petrochemical, national defense, machinery and textile industries, and is an important engineering plastic. But it has certain defects in heat resistance and mechanical stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/14C08G69/18C08K9/06C08K7/26C08K3/34
Inventor 杨桂生李枭
Owner HEFEI GENIUS NEW MATERIALS
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