COATING COMPOSITION
Provided is a coating composition capable of forming a coating film capable of maintaining excellent tack-free properties (releasability) for a long period of time on a plastic substrate or a rubber substrate, and particularly an elastic substrate made of rubber. The coating composition contains a rubber and an oil that is a liquid at 25° C., wherein the oil is dispersed at an average particle diameter of 50 μm or less.
1 . A coating composition, comprising:
a rubber; and
an oil that is a liquid at 25° C., wherein
the oil is dispersed at an average particle diameter of 50 μm or less.
2 . The coating composition according to claim 1 , further comprising fluorine resin particles.
3 . The coating composition according to claim 1 , further comprising a silane coupling agent.
4 . The coating composition according to claim 2 , wherein the oil is included at an amount of 1 to 35 wt. % of the amount (solid fraction) in the coating composition or the total amount (solid fraction) of the rubber and the fluorine resin particles.
5 . The coating composition according to claim 2 , wherein the rubber is included at an amount of 40 wt. % or more of the total amount (solid fraction) of the rubber and the fluorine resin particles in the coating composition.
6 . The coating composition according to claim 1 , wherein the rubber is a hydrogenated acrylonitrile butadiene rubber or silicone rubber.
7 . The coating composition according to claim 1 , wherein the oil is a fluoro oil or silicone oil.
8 . The coating composition according to claim 2 , wherein the fluorine resin particles comprise melt-processable fluorine resin.
9 . The coating composition according to claim 8 , wherein the fluorine resin particles comprise PFA or FEP.
10 . A rubber or plastic substrate having a coating film made of the coating composition according to claim 1 on a surface, wherein the oil is dispersed in the coating film.
11 . The rubber or plastic substrate according to claim 10 , wherein the n-hexadecane contact angle of the coating film is 50 degrees or more.