Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1998-07-06
2000-05-02
Nakarani, D. S.
Stock material or miscellaneous articles
Composite
Of silicon containing
359580, 359581, 428412, 4284255, 428451, 524780, 524783, 524785, 524786, 528 14, 528 15, 528 16, 528 17, 528 18, 528 19, G02B 111, C09D20100
Patent
active
060570393
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a coating composition useful for forming, on the surface of a synthetic-resin-made lens, a transparent film that is excellent in abrasion resistance, chemical resistance, warm water resistance, heat resistance, durability shown by weathering resistance and the like, and dye-affinity or dyeability. Further, the present invention also relates to a composite structure obtainable by providing an antireflection film of an inorganic material (hereinafter may also be referred to as "vapor-deposited inorganic film") on the above transparent film.
BACKGROUND ART
Synthetic-resin-made lenses, particularly those lenses which are made from diethylene glycol bis(allyl carbonate) resin (CR-39), are superior to glass-made lenses in safety, processability, appearance, and the like. Moreover, these synthetic-resin-made lenses have been spread rapidly in recent years due to the development of antireflection technique and hard coat technique.
To obtain a hard coat lens, there has generally been employed a method in which a silicon hard coat film is formed on the surface of a plastic lens. Japanese Patent Publications No. 11727/1985 and No. 30350/1985 disclose hard coat compositions with which acetylacetonates containing Al (III) as the central metallic atom thereof are used as curing catalysts.
Further, Japanese Patent Publication No. 33868/1986 discloses hard coat compositions to which amine compounds, polyvalent carboxylic acids, various metallic salt compounds of acetylacetone, phenolic compounds, boron-trifluoride-containing compounds and the like are added.
Furthermore, Japanese Patent Publication No. 9266/1987 discloses hard coat compositions with which ammonium salt of a peroxy acid is used, and Japanese Patent Publication No. 59601/1992 discloses hard coat compositions with which magnesium salt of a peroxy acid is used.
The hard coat compositions to which the above-described curing catalysts are added can give films which have no serious problems in fundamental properties. However, in order to prolong the lives of the composition liquids, complicated control such as pH adjustment is required, so that these compositions are not necessarily satisfactory.
DISCLOSURE OF THE INVENTION
We made earnest studies in order to solve the aforementioned problems, and, as a result, unexpectedly found that it is possible to harmoniously attain high productivity and excellent fundamental properties by the combination use of Fe, Al, Sn or Ti acetylacetonate, or a perchloric acid, or a carboxylic acid or an anhydride thereof, and Li, Cu or Mn acetylacetonate.
Further, we also found the following: when a composition comprising as its main components metallic oxide fine particles, a silane compound having a polymerizable reactive group, and a polyfunctional epoxy compound is used, the resulting thermally cured coating film has improved transparency and hardness, and also shows excellent dye-affinity and high adhesion (durability) to an inorganic vapor-deposited film; and a coating liquid of such a composition has a prolonged life.
BEST MODE FOR CARRYING OUT THE INVENTION
Accordingly, the present invention relates to a coating composition comprising (I) a polymerizable curing component, and (II) the following components (A) and (B) in combination as curing catalysts:
(A) at least one compound selected from the group consisting of: (III), Al (III), Sn (IV) or Ti (IV), carboxylic acids, or an anhydride thereof,
(B) an acetylacetonate having as the central metallic atom thereof Li (I), Cu (II), Mn (II) or Mn (III).
Conventionally-known components can be used as the polymerizable curing component, a main component of the coating composition.
In the present invention, a coating composition comprising as its main component the following (C), (D), (E) or (F), and a composite structure obtained by providing an antireflection film of an inorganic material on the surface of a film made from this coating composition show particularly excellent effects:
(C) fine particles comprising at least o
REFERENCES:
patent: 4908065 (1990-03-01), Tanitsu et al.
patent: 5314947 (1994-05-01), Sawaragi
Kinoshita Jun
Takeshita Katsuyoshi
Nakarani D. S.
Seiko Epson Corporation
LandOfFree
Coating composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1592322