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Car rear windshield heating wire silver paste and preparation method thereof

A rear windshield and heating wire technology, applied in ohmic resistance heating, heating element materials, transparent/reflective heating devices, etc., can solve problems such as aging, achieve strong adhesion, low void rate, and good defogging effect

Inactive Publication Date: 2016-07-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the heating wire is exposed to the air for a long time, it is susceptible to aging due to environmental influences

Method used

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  • Car rear windshield heating wire silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The automobile rear windshield heating wire silver paste described in this embodiment is prepared from the following raw materials, and each raw material and mass percentage are:

[0024] 70% silver powder, of which the mass ratio of flake silver powder to spherical silver powder is 7:3; Na-Ca lead-free glass powder 5%; ethyl cellulose 1%; organic additive 4%; terpineol 20%.

[0025] Among them, the organic additives are plasticizers, anti-settling agents, coupling agents, and surfactants, the plasticizer is dibutyl phthalate, the anti-settling agent is polyamide wax slurry, and the coupling agent is KH-570. The surfactant is lecithin, and the mass ratio of plasticizer, anti-settling agent, coupling agent and surfactant is 2:1:2:1.

[0026] The preparation method of the automobile rear windshield heating wire silver paste described in the present embodiment specifically comprises the following steps:

[0027] (1) Heat ethyl cellulose, organic additives and organic solv...

Embodiment 2

[0031] The automobile rear windshield heating wire silver paste described in this embodiment is prepared from the following raw materials, and each raw material and mass percentage are:

[0032] Silver powder 80%, of which, the mass ratio of flake silver powder and spherical silver powder is 1:1; Na-Ca series lead-free glass powder 2%; ethyl cellulose 0.5%; organic additive 1.5%; terpineol 16%.

[0033] Among them, the organic additives are plasticizers, anti-settling agents, coupling agents, and surfactants, the plasticizer is dibutyl phthalate, the anti-settling agent is polyamide wax slurry, and the coupling agent is KH-570. The surfactant is lecithin, and the mass ratio of plasticizer, anti-settling agent, coupling agent and surfactant is 2:1:2:1.

[0034] The preparation method of the automobile rear windshield heating wire silver paste described in the present embodiment specifically comprises the following steps:

[0035] (1) Heat ethyl cellulose, organic additives, an...

Embodiment 3

[0039] The automobile rear windshield heating wire silver paste described in this embodiment is prepared from the following raw materials, and each raw material and mass percentage are:

[0040] Silver powder 60%, wherein the mass ratio of flake silver powder and spherical silver powder is 7:3; Na-Ca series lead-free glass powder 10%; ethyl cellulose 2%; organic additive 3%; terpineol 25%.

[0041] Among them, the organic additives are plasticizers, anti-settling agents, coupling agents, and surfactants, the plasticizer is dibutyl phthalate, the anti-settling agent is polyamide wax paste, and the coupling agent is KH-570. The surfactant is lecithin, and the mass ratio of plasticizer, anti-settling agent, coupling agent and surfactant is 2:1:2:1.

[0042] The preparation method of the automobile rear windshield heating wire silver paste described in the present embodiment specifically comprises the following steps:

[0043] (1) Heat ethyl cellulose, organic additives and organ...

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Abstract

The invention discloses a car rear windshield heating wire silver paste and a preparation method thereof, which belong to the technical field of material preparation. The silver paste is prepared by the following raw materials, by mass percentage, 60% to 80% of silver powder, 2% to 10% of lead-free glass powder, 0.5% to 2% of macromolecule resin, 1.5% to 4% of an organic additive and 16% to 25% of an organic solvent. The method of the invention comprises steps: the macromolecule resin, the organic additive and the organic solvent are heated for 5 to 30 min in a water bath at a temperature of 50 to 60 DEG C, stirring is carried out to realize complete dissolution, and after cooling, an organic carrier is obtained; the uniformly-mixed silver powder, the lead-free glass powder and the organic carrier are mixed and stirred uniformly, a three-roll grinder is used for rolling for three to five times until the fineness of the slurry to be uniform, and thus, the car rear windshield heating wire silver paste is obtained. The prepared silver paste has small sheet resistance, low voidage, high acid resistance, and strong adhesion of the silver paste film layer after sintering, is used for the car rear windshield and has good mist eliminating effects.

Description

technical field [0001] The invention relates to an automobile rear windshield heating wire silver paste and a preparation method thereof, belonging to the technical field of material preparation. Background technique [0002] Silver powder has good thermal and electrical conductivity, and is cheap compared to other precious metal powders, so it is widely used as the conductive phase of conductive paste. Lead-containing glass has low-temperature sintering performance and good bonding performance. Lead-containing silver paste is an electronic functional material integrating chemical industry, electronics, and metallurgy. However, lead-free glass powder is used because lead pollutes the environment and is harmful to the human body. The prepared silver paste is an inevitable trend. [0003] The heating wire on the rear windshield of the car is used to defrost the fog and has become one of the essential devices for the car. In order to achieve the purpose of rapid defrosting, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/12H05B3/86
CPCH05B3/12H05B3/86H05B2203/017
Inventor 严继康滕媛甘国友闫方存李文琳杜景红谈松林
Owner KUNMING UNIV OF SCI & TECH
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