Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1994-12-15
1996-11-19
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
427404, 4274071, 427409, 427410, 5253289, 5253292, 525340, 525342, 525343, 525353, 525374, 526288, 526302, 5263031, 526304, 5263285, 526332, C08L10108, C08F22028, C08F22032, C08F21816
Patent
active
055764061
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The present invention relates to a novel and useful curable composition. More specifically, the present invention relates to a curable composition possessing a superior curability characterized in employing as reactive functional groups a specific substituted methyl ester group and an active hydrogen-containing group and/or an epoxy group. Moreover, the present invention relates to a curable composition with an extremely high utility for providing a cured film possessing various properties such as acid resistance, and the like.
The curable composition according to the present invention can be widely used in a variety of different fields such as paints, i.e., coatings for metals and the like, adhesive agents, sealing agents, casting resins, and the like.
In addition the present invention also relates to a method for forming a film using a liquid paint incorporating the aforementioned novel curable composition. This method for forming a film is extremely useful in the top-coating and/or repair finish of vehicles.
BACKGROUND ART
Accompanying the recent degradation of the global environment, acid rain has begun to cause damage to the coated surfaces of outdoor structures, vehicles, and the like, such that the development of a composition forming a cured film possessing superior resistance to acid is in great demand.
As the top-coat for vehicles, a curable composition prepared from a hydroxyl group-containing acrylic resin or a hydroxyl group-containing alkyd resin, and an amino resin has been employed; however, the cured film obtained from this composition has displayed an insufficient acid resistance and the like; hence, drastic improvement of this composition is desirable.
In addition, a composition prepared from a hydroxyl group-containing acrylic resin and polyisocyanate compound is currently employed for a variety of uses as a composition curable at room temperatures to yield a cured film possessing a superior acid resistance.
However, this composition has a toxicity problem attributed to the polyisocyanate compound.
As a result, the development of a room temperature curable composition which can produce a film of an extremely high utility possessing superior acid resistance and is free from toxicity problems is currently in high demand.
It is an object of the present invention to provide a curable composition which possesses a superior curability and produces a cured film having excellent properties such as acid resistance and the like.
DISCLOSURE OF THE INVENTION
The inventors of the present invention have commenced intensive research in order to develop a novel composition for baking use which provides a cured film having superior acid resistance, as well as novel isocyanate-free room temperature curable composition which provides superior acid resistance.
As a result, the inventors have achieved their objective and completed the present invention by confirming that a curable composition containing a compound or a polymer having a specific substituted methyl ester group as an essential component possesses extremely high utility and solves the aforementioned problems.
In other words, the present invention basically provides a curable composition incorporating as an essential component a polymer (A) possessing in a molecule both at least one substituted methyl ester group represented by general formula [I], active hydrogen-containing group and/or epoxy group; or a curable composition incorporating as essential components a compound (C) possessing in a molecule at least two substituted methyl ester groups represented by general formula [I], (D) possessing in a molecule at least two active hydrogen-containing groups and/or epoxy groups; and furthermore a curable composition incorporating a curing catalyst (B) into both of the aforementioned compositions.
In addition, the present invention also provides a method for forming a film from a liquid paint containing the various curable compositions mentioned above.
The aforementioned polymer (A) employed in the present invention represent
REFERENCES:
patent: 4384097 (1983-05-01), Wingler et al.
patent: 5198503 (1993-03-01), Numa
patent: 5264468 (1993-11-01), Miyahara
patent: 5356996 (1994-10-01), Nakao
patent: 5409994 (1995-04-01), Nakao
Ooka Masataka
Yamamura Kazuo
Dainippon Ink and Chemicals Inc.
Zitomer Fred
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