Aqueous coating agent composition and a coating composition for an aqueous lubricating film comprising the same
[Problem] To provide an aqueous coating agent composition (in particular, an aqueous coating composition for lubricating films that contains a solid lubricant) which as a whole is excellent in terms of flowability, applicability, and storage stability and which is capable of forming satisfactory and smooth coating films effective in stick-slip inhibition. [Solution] The problem can be solved with an aqueous coating agent composition which comprises (A) a curable resin in an aqueous emulsion form, (B) a surfactant, (C) solid particles, (D) one or more nitrogenous heterocyclic compounds, (E) a film-forming silicone in an aqueous emulsion form, and (F) water. In particular, it is preferable that the (C) component comprise a solid lubricant. In view of the environmental regulations, it is especially preferable that the (D) component be 1,3-dimethyl-2-imidazolidinone.
1. An aqueous coating agent composition comprising:
(A) A curable resin in the form of an aqueous emulsion,
(B) A surfactant,
(C) Solid particles,
(D) One or more types of nitrogen-containing heterocyclic compounds,
(E) A film-forming silicone in the form of an aqueous emulsion, and
(F) Water,
wherein Component (E) corresponds to a film-forming silicone in the form of an aqueous emulsion comprising 100 parts per mass of (Ea) a polyorganosiloxane having at least two hydroxyl groups or hydrolyzable groups bonded to a silicon atom per molecule, 0.1 to 200 parts per mass of (Eb) colloidal silica, 1 to 100 parts per mass of (Ec) ionic surfactant, 0 to 50 parts per mass of (Ed) nonionic surfactant and 10 to 5,200 parts per mass of (Ef) water.
2. The aqueous coating agent composition as specified in claim 1 , which includes 0.1 to 50 parts per mass of Component (B), 5 to 200 parts per mass of Component (C), 1 to 20 parts per mass of Component (D), 0.1 to 10 parts per mass of a solid component of Component (E), and 50 to 1,000 parts per mass of Component (F), each per 100 parts per mass of a solid component of Component (A) specified above.
3. The aqueous coating agent composition as specified in claim 1 , wherein, in Component (E), the nonionic surfactant corresponding to Component (Ed) is (Ed-1) a polyoxyethylene-polyoxypropylene copolymer-type nonionic surfactant.
4. The aqueous coating agent composition as specified in claim 1 , wherein, in Component (E), Component (Ea) corresponds to a polyorganosiloxane having at least two (Ea-1) groups selected from a set comprising a hydroxyl group, an alkoxy group and an alkoxyalkoxy group bonded to a silicon atom.
5. The aqueous coating agent composition as specified in claim 1 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes 0.1 to 100 parts per mass of (Eg) an aminoxy group-containing organosilicon compound having an aminoxy group bonded to a silicon atom.
6. The aqueous coating agent composition as specified in claim 1 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes 0.1 to 50 parts per mass of (Eh) an alkoxysilane or alkoxyalkoxysilane, or a partially hydrolyzed condensate of said alkoxysilane or alkoxyalkoxysilane, as expressed by the formula R a SiX 4-a where R corresponds to an unsubstituted monovalent hydrocarbon group or a substituted monovalent hydrocarbon group, X corresponds to an alkoxy group or an alkoxyalkoxy group, and a corresponds to 0, 1 or 2.
7. The aqueous coating agent composition as specified in claim 1 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes (Ei) an amine compound as a pH adjuster.
8. The aqueous coating agent composition as specified in claim 1 , wherein, in Component (E), the colloidal silica corresponding to Component (Eb) is in the form of an aqueous dispersion having a pH of 7.0 or greater which is stabilized with alkali metal ions, ammonium ions or an amine.
9. The aqueous coating agent composition as specified in claim 1 , wherein Component (D) specified above corresponds to a nitrogen-containing heterocyclic compound represented by any one of Structural Formulas (D-1) through (D-3) given below
Where R 1 corresponds to a hydrogen atom or alkyl groups each independently having 1 to 9 carbon atoms, and n is a number ranging from 1 to 10.
10. An aqueous coating agent composition as specified in claim 1 , wherein at least part of the aforementioned Component (C) corresponds to a solid lubricant.
11. A method comprising applying the aqueous coating agent composition as specified in claim 1 , as a coating composition for an aqueous lubricating film.
12. An aqueous coating agent composition comprising:
(A) A curable resin in the form of an aqueous emulsion,
(B) 0.1 to 50 parts per mass of a surfactant per 100 parts per mass of a solid component of Component (A),
(C) 5 to 200 parts per mass of solid particles per 100 parts per mass of a solid component of Component (A),
(D) 1 to 20 parts per mass of one or more types of nitrogen-containing heterocyclic compounds per 100 parts per mass of a solid component of Component (A),
(E) 0.1 to 10 parts per mass of a film-forming silicone in the form of an aqueous emulsion per 100 parts per mass of a solid component of Component (A), and
(F) 50 to 1,000 parts per mass of water per 100 parts per mass of a solid component of Component (A),
wherein at least part of the aforementioned Component (C) corresponds to a solid lubricant,
wherein Component (D) specified above corresponds to a nitrogen-containing heterocyclic compound represented by any one of Structural Formulas (D-1) through (D-3) given below
wherein R 1 corresponds to a hydrogen atom or alkyl groups each independently having 1 to 9 carbon atoms, and n is a number ranging from 1 to 10, and
wherein Component (E) corresponds to a film-forming silicone in the form of an aqueous emulsion comprising 100 parts per mass of (Ea) a polyorganosiloxane having at least two hydroxyl groups or hydrolyzable groups bonded to a silicon atom per molecule, 0.1 to 200 parts per mass of (Eb) colloidal silica, 1 to 100 parts per mass of (Ec) ionic surfactant, 0 to 50 parts per mass of (Ed) nonionic surfactant and 10 to 5,200 parts per mass of (Ef) water.
13. The aqueous coating agent composition as specified in claim 12 , wherein, in Component (E), the nonionic surfactant corresponding to Component (Ed) is (Ed-1) a polyoxyethylene-polyoxypropylene copolymer-type nonionic surfactant.
14. The aqueous coating agent composition as specified in claim 12 , wherein, in Component (E), Component (Ea) corresponds to a polyorganosiloxane having at least two (Ea-1) groups selected from a set comprising a hydroxyl group, an alkoxy group and an alkoxyalkoxy group bonded to a silicon atom.
15. The aqueous coating agent composition as specified in claim 12 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes 0.1 to 100 parts per mass of (Eg) an aminoxy group-containing organosilicon compound having an aminoxy group bonded to a silicon atom.
16. The aqueous coating agent composition as specified in claim 12 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes 0.1 to 50 parts per mass of (Eh) an alkoxysilane or alkoxyalkoxysilane, or a partially hydrolyzed condensate of said alkoxysilane or alkoxyalkoxysilane, as expressed by the formula R a SiX 4-a where R corresponds to an unsubstituted monovalent hydrocarbon group or a substituted monovalent hydrocarbon group, X corresponds to an alkoxy group or an alkoxyalkoxy group, and a corresponds to 0, 1 or 2.
17. The aqueous coating agent composition as specified in claim 12 , wherein Component (E) furthermore corresponds to a film-forming silicone in the form of an aqueous emulsion which includes (Ei) an amine compound as a pH adjuster.
18. The aqueous coating agent composition as specified in claim 12 , wherein, in Component (E), the colloidal silica corresponding to Component (Eb) is in the form of an aqueous dispersion having a pH of 7.0 or greater which is stabilized with alkali metal ions, ammonium ions or an amine.
19. A method comprising applying the aqueous coating agent composition as specified in claim 12 , as a coating composition for an aqueous lubricating film.