Protective coating composition for electronic board and method of preparing same
AssigneesHyundai Motor Company, Kia Corporation
InventorsTae Seung Lee, Yong Cheol Kim, Chang Su Yoo, Jun Ho Lee, Eun Su Yun
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Abstract
Disclosed are a protective coating composition for an electronic board and a method for preparing the same. The protective coating composition includes urethane-modified alkyd resins that can prevent poor grounding caused by low molecular weight siloxanes generated in a conventional silicone-type coating compositions and preventing performance degradation caused by tin whisker growth while lowering emissions of volatile organic compounds (VOCs).
Claims19
A protective coating composition for an electronic board, comprising:
- a first resin comprising a first urethane-modified alkyd resin;
- a second resin synthesized through a polymerization of second urethane-modified alkyd resin and a silicone resin;
- a solvent comprising carbon-based solvents, ketone-based solvents, alcohol-based solvents, or combinations thereof;
- a fluidity control agent;
- and
- a metal catalyst,
- the protective coating composition optionally comprising a flame retardant,
- wherein the fluidity control agent comprises a micronized calcium dispersion, urea-modified polyimide, or combinations thereof.
A method for preparing a protective coating composition for an electronic board, comprising:
- preparing a first resin comprising a first urethane-modified alkyd resin, by (i) polymerizing fatty acid, polybasic acid, and polyhydric alcohol to obtain a first alkyd resin, and (ii) polymerizing the alkyd resin and an isocyanate;
- preparing a second resin by (i) polymerizing fatty acid, polybasic acid, and polyhydric alcohol to obtain a second alkyd resin, (ii) polymerizing the second alkyd resin and an isocyanate to prepare a urethane-modified alkyd resin, and (iii) polymerizing the second urethane-modified alkyd resin with a silicone resin;
- and
- adding the first resin, a second resin, a fluidity control agent, and a metal catalyst to a solvent comprising a carbon-based solvent, a ketone-based solvent, an alcohol-based solvent, or combinations thereof, and stirring the mixture;
- wherein the fluidity control agent comprises a micronized calcium dispersion, urea-modified polyimide, or combinations thereof.
Dependencies are inferred from the claim text.