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Oxide-containing high-molecular carbon paste and preparation method for heating material with PTC effect

A technology for heating materials and oxides, applied in the field of preparation of heating materials, can solve the problems of limited production and use, type and state can not meet market demand, insufficient distribution of fillers, etc., to achieve soft structure, inhibition of NTC effect, thermal conductivity, etc. good performance

Inactive Publication Date: 2015-02-25
张庆成 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer-based PTC material filler produced by traditional technology cannot be fully distributed into the matrix, and its type and state cannot meet more market demand, which limits its application to a certain extent
The NTC effect can be suppressed by adding a crosslinking agent to the PTC material based on a crystalline polymer, but it will also cause the PTC material to form a hard plastic structure, which greatly limits its production and use.

Method used

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  • Oxide-containing high-molecular carbon paste and preparation method for heating material with PTC effect
  • Oxide-containing high-molecular carbon paste and preparation method for heating material with PTC effect
  • Oxide-containing high-molecular carbon paste and preparation method for heating material with PTC effect

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1 Weigh 25g of methyl vinyl silicone rubber raw rubber (M= 600 000, vinyl content 0.15 mol %), put it into a three-necked flask, add 100g of xylene to it, start stirring at 60°C, and replenish it from time to time Add xylene, after the raw methyl vinyl silicone rubber is dissolved, add 7.5g of carbon black (20-40nm in particle size) and 1.5g of nano-silica (25-40nm in particle size) into the three-necked flask in proportion Continue to stir, and add 80g xylene, after the solution is uniform, stop the reaction and leave it to cool, make the polymer carbon slurry containing oxide, figure 1 It is the SEM image of the carbon paste. It can be seen from the figure that the carbon black is evenly distributed in the methyl vinyl silicone rubber, and the average particle size is 80nm. Glass fiber mesh cloth with a mesh size of 10×10mm is used to make mesh structures of 8×6cm, 10×10cm, and 14×10cm respectively, and copper wires are tied on both sides of the outer ends o...

Embodiment 2

[0033] Example 2 Weigh 25g of methyl vinyl silicone rubber raw rubber (M= 600 000, vinyl content 0.15 mol %), put it into a three-necked flask, add 100g of xylene to it, start stirring at 60°C, and replenish it from time to time Add xylene, after the raw methyl vinyl silicone rubber is dissolved, add 7.5g of carbon black (20-40nm in particle size) and 3.5g of nano-silica (25-40nm in particle size) in proportion to the three-necked flask Continue to stir, and add 80g xylene, after the solution is uniform, stop the reaction and leave it to cool to make a polymer carbon slurry containing oxide. Glass fiber mesh cloth with a mesh size of 10×10mm is used to make mesh structures of 8×6cm, 10×10cm, and 14×10cm respectively, and copper wires are tied on both sides of the outer ends of the mesh warps as The electrodes are made into three specifications of heating mesh skeletons, figure 2 It is the photo of the heating grid skeleton produced. Use benzoyl peroxide (BPO) as the cro...

Embodiment 3

[0034] Example 3Weigh 25g of methyl vinyl silicone rubber raw rubber (M= 600 000, vinyl content 0.15 mol %), put it into a three-necked flask, add 100g of xylene to it, start stirring at 80°C, and replenish it from time to time Add xylene, after the raw methyl vinyl silicone rubber is dissolved, add 7.5g of carbon black (20-40nm in particle size) and 4.5g of nano-silica (25-40nm in particle size) in proportion to the three-necked flask , continue to stir, and add 80g xylene, after the solution is uniform, stop the reaction and leave it to cool to make a polymer carbon slurry containing oxide. Glass fiber mesh cloth with a mesh size of 10×10mm is used to make mesh structures of 8×6cm, 10×10cm, and 14×10cm respectively, and copper wires are tied on both sides of the outer ends of the mesh warps as The electrodes are made into three kinds of heating mesh skeletons. Use benzoyl peroxide (BPO) as the crosslinking agent, weigh 50g of PTC carbon paste, and convert the methyl vinyl...

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Abstract

The invention discloses an oxide-containing high-molecular carbon paste, a preparation method for a heating material with PTC effect, and the heating material which contains the oxide-containing high-molecular carbon paste and possesses PTC effect. The carbon paste prepared by employing the method is good in morphology, the heating material is uniformly coated with the carbon paste and is flexible and smooth, also the preparation method is simple, raw materials are easy to obtain, the cost is low, industrialization of the PTC carbon paste and the heating material thereof is facilitated, and the carbon paste and the heating material have wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of polymer carbon slurry containing oxides and a heating material with PTC effect. Background technique [0002] The PTC (Positive Temperature Coefficient) effect, that is, the positive temperature coefficient effect, means that the resistance of this material will increase with the increase of temperature. PTC material refers to a material whose resistance has a nonlinear positive temperature coefficient effect. The resistivity of the material is basically unchanged or only changes slightly in a certain temperature range. When the temperature reaches the characteristic transition point temperature of the material, The resistivity of a material increases rapidly over a small temperature range10 3 ~10 9 Magnitude. The currently used PTC materials can be divided into ceramic-based PTC materials and polymer-based PTC materials according to the substrate. Due to some defects of ceramic thermosensitive mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K3/04C08K3/22C08K3/36C08J3/24C08K5/14C08K7/14
Inventor 张庆成
Owner 张庆成
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