Positive temperature coefficient macromolecular composition, positive temperature coefficient protection component and manufacturing methods

A positive temperature coefficient, polymer technology, applied in the field of positive temperature coefficient polymer composition, can solve the problems of limited delivery time, processing rate, large-scale cracking, affecting the time and cost of the preparation process, etc., to improve the burden Temperature coefficient effect, effect of saving preparation process time

Active Publication Date: 2012-07-25
TATUNG UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, if radiation exposure is to be performed, it is generally necessary to entrust the Nuclear Energy Institute in Taiwan, China, so the delivery time will be limited by the processing speed of the Nuclear Energy Institute
On the other hand, polymers irradiated by radiation may be cracked on a large scale due to excessive radiation intensity, and the original physical and electrical properties of polyethylene cannot be restored; if cobalt 60 gamma rays with lower energy are used, generally 5 The radiation dose is above 100Mard, and the irradiation time is as long as two to three days, which will also affect the time and cost required for the overall preparation process

Method used

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  • Positive temperature coefficient macromolecular composition, positive temperature coefficient protection component and manufacturing methods
  • Positive temperature coefficient macromolecular composition, positive temperature coefficient protection component and manufacturing methods
  • Positive temperature coefficient macromolecular composition, positive temperature coefficient protection component and manufacturing methods

Examples

Experimental program
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preparation example Construction

[0026] Preparation of silane-grafted polyamide:

[0027] Add a silane crosslinking agent containing unsaturated carbon bonds and alkoxy groups, and an organic peroxide to the polyamide, optionally add a catalyst, and put it into a plastic spectrometer (Brabender Plasti-Corder TorqueReometer / PLE-330) to mix evenly , react at a temperature range of 160 to 280 ° C and a screw speed range of 5 to 200 rpm / min for 6 to 25 minutes, wherein the organic peroxide first forms free radicals due to thermal fracture, and the free radicals are transferred to the polyamide, and then combined with The unsaturated carbon bond on the silane crosslinking agent undergoes grafting reaction, so that silane grafted polyamide can be obtained.

[0028] The types of polyamides mentioned above are not limited, and the polyamides to be used can be selected according to the operating temperature required by the positive temperature coefficient protection components, such as nylon 6, 9, 12, 6-6, 5-10, 6-12,...

Embodiment 1

[0050] In 99.2 parts by weight of nylon 12 (model: Grilamid L20G, produced by EMS), add 0.8 parts by weight of vinyltrimethoxysilane (Vinyltrimethyloxysilane, VTMS, Dow Corning Co.), 0.6 parts by weight of diisopropyl peroxide Benzene (dicumyl peroxide, DCP, Aldrich Chemical Co.) and 0.5 parts by weight of dibutyltin dilaurate (DBTDL) were put into a plastic spectrometer and mixed evenly, at a temperature of 250 °C and a screw speed of 40 rpm / min, the Following the reaction shown in Scheme 1, vinyltrimethoxysilane-grafted nylon 12 can be obtained after 15 minutes of reaction.

[0051] Process 1

[0052]

[0053] The silane-grafted nylon 12 obtained above was pulverized and pulverized using a pulverizer (Retsch) and a mill (Retsch / ZM-2000) to form a powder. Linked for 3 hours to obtain cross-linked silane-grafted nylon 12.

[0054] Process 2

[0055] 1. Hydrolysis reaction

[0056]

[0057] 2. Condensation reaction

[0058]

[0059] Mix 35 parts by weight of nano-...

Embodiment 2 and 4

[0061] The preparation method of the positive temperature coefficient polymer compositions of Examples 2 and 4 is substantially the same as that of Example 1, the main difference lies in the content of vinyltrimethoxysilane and nylon 12 as shown in Table 1 below.

[0062] Table 1

[0063] Nylon 12 (parts by weight)

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Abstract

The invention relates to a manufacturing method for a positive temperature coefficient macromolecular composition, which comprises the following steps of: performing a crosslinking reaction on siliane grafted polyamide to obtain crosslinked silane grafted polyamide; and adding a metallic conduction material or a non-metallic conduction material and selectively adding an anti-oxidant into the crosslinked silane grafted polyamide for blending. The invention also discloses the positive temperature coefficient macromolecular composition, a positive temperature coefficient protection component anda manufacturing method for the positive temperature coefficient protection component. The manufacturing method of the invention can save the whole manufacturing process time of the protection component and improves a negative temperature coefficient effect, and the positive temperature coefficient protection component can effectively pass a stability test.

Description

technical field [0001] The present invention relates to a positive temperature coefficient polymer composition, a manufacturing method of the positive temperature coefficient polymer composition, a protection component made using the positive temperature coefficient polymer composition, and a manufacturing method of the protection component. Background technique [0002] With the increasing demand for electronic products, industries such as 3C industry, precision electronics industry, battery industry, and motor heavy industry are also developing more vigorously. However, electronic products in these industries have sophisticated structures and are expensive. If the voltage in the circuit increases sharply or the current is overloaded, it is easy to cause internal damage to the electronic components. Therefore, it is quite necessary to configure protective components in the electronic products to achieve integration. The purpose of the current flow is to prevent electronic e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08K3/08C08K3/00C08J3/24
Inventor 黄继远曹耕毓蔡清山
Owner TATUNG UNIVERSITY
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