Coating agent composition
View Patent ↗The coating agent composition comprises an emulsion containing (A) polydiorganosiloxane having a viscosity of 50 to 10,000,000 mPa·s at 25° C. and having both terminal ends blocked by hydroxyl groups, (B) polyorganohydrogensiloxane having at least three hydrogen atoms bonded to silicon atoms in one molecule, (C) a curing catalyst, and (D) chlorinated polyolefine and/or acryl-modified polyolefine, with which (E) fine spherical particles comprised of a rubber-like elastomer having hardness of less than 90 are mixed to disperse into it. The coating agent composition having good uniform applying property, non tackness, water repellency and lubricating properties and outstanding adhesiveness to a rubber or plastic substrate can be obtained.
1. A coating agent composition, comprising:
a water-based emulsion and fine spherical particles, the water-based emulsion comprising:
A) polydiorganosiloxane having a viscosity of 50 to 10,000,000 mPa·s at 25° C. and having both terminal ends blocked by hydroxyl groups,
B) polyorganohydrogensiloxane having at least three hydrogen atoms bonded to silicon atoms in one molecule,
C) a curing catalyst, and
D) chlorinated polyolefine and/or acryl-modified polyolefine,
wherein the fine spherical particles comprise an elastomer selected from the group consisting of a cross-linked urethane-based polymer, a cross-linked methyl methacrylate-based polymer, a cross-linked acrylic ester-based polymer, and a cross-linked butyl methacrylate-based polymer, the elastomer having hardness of 60 to 80, and are mixed to disperse into the water-based emulsion.
2. The coating agent composition according to claim 1 , wherein the total content of the chlorinated polyolefine and the acryl-modified polyolefine of the Components (D) is 5 to 150 parts by weight to 100 parts by weight of the polydiorganosiloxane of the component (A).
3. The coating agent composition according to claim 1 , wherein the content of the fine spherical particles of the elastomer is 10 to 150 parts by weight to 100 parts by weight of the polydiorganosiloxane (A).
4. The coating agent composition according to claim 1 , further comprising alkylamine oxide and/or water-insoluble amino group-containing polyorganosiloxane.
5. A molded part formed of a foamed or non-foamed ethylene-propylene-diene ternary copolymer that is coated with the coating agent composition of claim 1 .