Conductive ink for transfer printing process and preparation method thereof

A conductive ink and process technology, which is applied in the field of conductive ink for pad printing and its preparation, can solve the problems of substandard friction resistance, poor electrical conductivity, poor ink degumming rate, etc.

Pending Publication Date: 2021-06-15
SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic products have defects such as poor ink degumming rate, substandard friction resistance, and poor electrical conductivity, so the research and development of this product is of great significance

Method used

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  • Conductive ink for transfer printing process and preparation method thereof
  • Conductive ink for transfer printing process and preparation method thereof
  • Conductive ink for transfer printing process and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The preparation method of conductive ink for described pad printing process comprises the following steps:

[0049] (1) Resin carrier premix

[0050] Add saturated polyester resin and thermoplastic polycarbonate resin into the reaction kettle according to the proportion, and gradually heat up to the first temperature, then add dibasic acid ester and propylene glycol methyl ether acetate into the reaction kettle dropwise, drop The time is 1.5~2h. After the dropwise addition, continue to react for 2~4h. Then, raise the temperature of the reaction kettle to the second reaction temperature, add flake graphite and fumed silica into the reaction kettle, react for 2~4h and discharge while hot. , filtered to obtain the mixed resin carrier, and stored away from light;

[0051] (2) Powder heat treatment

[0052] Pre-disperse the flake silver powder and nano-spherical silver powder before heat treatment;

[0053] (3) Ingredients

[0054] Add organic silicon, silane coupling ag...

Embodiment 1～5

[0065] A preparation method of conductive ink for pad printing process, each component and composition are shown in Table 1. Among them, saturated polyester resin and thermoplastic polycarbonate resin are used as the bonding phase. The formula is: first add saturated polyester resin and thermoplastic polycarbonate resin to the reaction kettle, and gradually heat up to 50 ° C, and then add the dibasic ester 1. Propylene glycol methyl ether acetate is added dropwise in a ratio of 5:1 and then heated and melted; the nano-spherical silver powder used is an ultrafine powder with an average particle size of 250-450nm. The average particle size of the flake silver powder is 8.5-11.5 μm. Saturated polyester resin is a high-molecular-weight solid saturated polyester resin with a molecular weight of 16000Mn, a Tg of 47°C, and a specific gravity of 1.23 at 30°C. It has excellent flexibility and weather resistance, and has excellent resistance to metals and plastics. adhesion performance...

Embodiment 6

[0074] A conductive ink for pad printing process is obtained by the following method:

[0075] (1) Weigh each component by the following parts by weight:

[0076]

[0077]

[0078] (2) Resin carrier premix

[0079] Add saturated polyester resin and polycarbonate into the reaction kettle according to the mass ratio of 2:1, and gradually raise the temperature to 45°C, then add dibasic acid ester and propylene glycol methyl ether acetate into the reaction kettle dropwise, drop The time is 1.5h, continue to react for 2h after the dropwise addition is completed, then, raise the temperature of the reactor to 65°C, add flake graphite and fumed silica into the reactor, react for 2h and discharge while it is hot, filter with a 350-mesh stainless steel mesh Obtain a polyurethane resin carrier and store it away from light;

[0080] (3) Powder heat treatment

[0081] The nano-spherical silver powder and the nano-spherical silver powder are mixed and pre-dispersed, and then placed...

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Abstract

The invention relates to conductive ink for a transfer printing process and a preparation method of the conductive ink. The conductive ink comprises the following components in parts by weight: 50-55 parts of flake silver powder, 15-20 parts of nano spherical silver powder, 10-15 parts of saturated polyester resin, 5-10 parts of thermoplastic polycarbonate, 10-15 parts of dibasic acid ester, 2-5 parts of propylene glycol methyl ether acetate, 0.2-0.5 part of polyethylene wax, 0.2-0.5 part of organic silicon, 0.05-0.1 part of a silane coupling agent, 0.2-0.5 part of fumed silica and 0.1-0.5 part of flake graphite. The preparation method comprises the steps of resin carrier premixing, powder heat processing, burdening, high-speed dispersion, three-roller grinding, filtering, finished product detection, homogeneous stirring and canning. Compared with the prior art, the conductive ink has the advantages of low curing temperature, high printing ink degumming rate, good wear resistance, high printing precision and the like.

Description

technical field [0001] The invention relates to the field of conductive silver paste, in particular to a conductive ink for a pad printing process and a preparation method thereof. Background technique [0002] Conductive inks are widely used in printed circuits, semiconductor packaging, solar cells and other fields. Conductive silver paste and conductive carbon paste are the most widely used series of products in conductive inks. These products are usually printed on flat substrates by screen printing and then dried to form conductive paths. With the development of the electronics industry, the traditional screen printing process cannot be printed on special-shaped objects, so the pad printing process has been developed. The pad printing process is one of the special printing methods. It can print graphics and images on the surface of irregular shaped objects through colloidal transfer printing, and is now becoming an important special printing. For example, the surface ...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/104C09D11/102C09D11/033C09D11/03C09D11/037
CPCC09D11/52C09D11/104C09D11/102C09D11/033C09D11/03C09D11/037
Inventor 江海涵朱庆明王德龙刘佳禄
Owner SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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