Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2001-08-27
2002-12-03
Short, Patricia A. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S107000, C525S118000, C525S119000, C525S123000, C525S124000, C525S131000, C525S162000, C525S163000, C525S175000, C525S176000, C525S216000, C525S326700, C525S328200, C525S327300, C525S327700, C525S329700, C525S329900, C525S330300, C525S330500, C525S330600, C525S934000, C526S309000
Reexamination Certificate
active
06489396
ABSTRACT:
BACKGROUND OF THE INVENTION
A. Technical Field
The present invention relates to a novel (meth)acrylate ester-based resin composition.
In more detail, the present invention relates to a novel (meth)acrylate ester-based resin composition which, for example, exhibits various good properties such as weather resistance, heat resistance, water resistance, acid resistance, alkali resistance, warm water resistance, impact resistance, processability, flexibility, hardness, elongation, transparency, luster, fleshy property, mirroring property, pigment dispersibility, and driability when being used for various uses such as coating agents (e.g. for films, plastics, glass, paper, fibers, leather), pressure sensitive adhesives, and adhesives in addition to various paints (e.g. lacquer type paints, curing type paints) such as paints for building exteriors, paints for building materials, paints for metals, paints for steel-made furniture, paints for plastics, heavy anticorrosive paints, waterproof paints for roofs, paints for cars, paints for car parts, and paints for electrical appliances.
B. Background Art
(Meth)acrylic resin paints which contain crosslinking agents are superior to noncrosslinking type acrylic resin paints in respect to such as weather resistance, heat resistance, water resistance, alkali resistance, warm water resistance, impact resistance, processability, and flexibility, and are therefore used in wide fields of such as building materials, woodworking, roofing tiles, metals, paper, plastics, glass, and fibers, and desired to be still more excellent in respect to the above properties.
Coating films of paints which are used in such as architectural fields and building fields have so far had problems of undergoing such as hazing, discoloring, blistering, or cracking due to such as ultraviolet rays, heat, alkali components as eluted from substrates, and recent acid rain because of being exposed to wind, rain, or sunlight for a long time. Therefore, in the case where durability and weather resistance for a long time are needed, it is effective to use such as solvent type fluororesin paints or acrylic silicone resin paints. However, there are problems in that these paints increase costs so much as to be usable actually for limited uses only.
In addition, cyclohexyl (meth)acrylate was particularly favorable as a polymerizable unsaturated monomer having the low hygroscopic functional group effective for achieving the high weather resistance. However, in the case where the cyclohexyl (meth)acrylate content of polymers is too high, the resultant coating films are inferior in such as flexibility, processability, and adhesion. Therefore, there are problems in that the current level is still insufficient, so the range of the actual use of the cyclohexyl (meth)acrylate is also limited.
SUMMARY OF THE INVENTION
A. Object of the Invention
An object of the present invention is to provide a novel (meth)acrylate ester-based resin composition which, for example, exhibits various good properties such as weather resistance, heat resistance, water resistance, acid resistance, alkali resistance, warm water resistance, impact resistance, processability, flexibility, hardness, elongation, transparency, luster, fleshy property, mirroring property, pigment dispersibility, and driability when being used, for example, as crosslinking type paints, adhesives, pressure sensitive adhesives, and fiber-processing materials, and has so low a resin viscosity as to be utilizable as a resin for coping with environmental pollution of such as low-VOC paints.
B. Disclosure of the Invention
The present inventors diligently studied to solve the above problems. As a result, they have completed the present invention by finding out that the above problems could be solved by a (meth)acrylate ester-based resin composition comprising a (meth)acrylate ester-based polymer and a crosslinking agent wherein the (meth)acrylate ester-based polymer is obtained by a process including the step of polymerizing a monomer component including a specific (meth)acrylate ester as an essential component wherein the (meth)acrylate ester possesses an alkylcyclohexylalkyl group as an introduced ester group.
That is to say, a (meth)acrylate ester-based resin composition, according to the present invention, comprises a (meth)acrylate ester-based polymer (I) and a crosslinking agent, wherein the (meth)acrylate ester-based polymer is obtained by a process including the step of polymerizing a monomer component including a polymerizable unsaturated monomer (a) as an essential component and has a reactive group wherein the polymerizable unsaturated monomer (a) is an alkylcyclohexylalkyl ester of (meth)acrylic acid, and wherein the crosslinking agent has at least two functional groups that are reactable with the reactive group. More specifically, the alkylcyclohexylalkyl ester of (meth)acrylic acid, as referred to in the present invention, has an alkyl group on the cyclohexyl group.
These and other objects and the advantages of the present invention will be more fully apparent from the following detailed disclosure.
DETAILED DESCRIPTION OF THE INVENTION
((Meth)acrylate Ester-based Polymer)
The (meth)acrylate ester-based polymer (I), which is an essential component of the (meth)acrylate ester-based resin composition according to the present invention, is a polymer which is obtained by a process including the step of polymerizing a monomer component including a polymerizable unsaturated monomer (a) as an essential component wherein the polymerizable unsaturated monomer (a) is an alkylcyclohexylalkyl ester of (meth)acrylic acid, and which has a reactive group. Incidentally, the cyclohexyl group in the molecular structure of the aforementioned polymerizable unsaturated monomer (a) has a substituent.
In addition, the aforementioned alkylcyclohexylalkyl ester of (meth)acrylic acid, which is an essential monomer component of the (meth)acrylate ester-based polymer (I) that is an essential component of the resin composition according to the present invention, is favorably denoted by the following general formula (1):
R
1
in the specific polymerizable unsaturated monomer (a) as denoted by the aforementioned general formula (1) is a hydrogen atom or methyl group.
R
2
in the specific polymerizable unsaturated monomer (a) as denoted by the aforementioned general formula (1) is a hydrogen atom or organic residue. In the case where the R
2
is an organic residue, favorable examples include 1-cyclohexylethyl (meth)acrylate (which might be referred to as cyclohexyl(methyl)methyl (meth)acrylate) although there is no especial limitation thereto. In addition, n is an integer of 1 to 4.
R
3
in the specific polymerizable unsaturated monomer (a) as denoted by the aforementioned general formula (1) is an organic residue on the cyclohexyl group. In addition, m is an integer of 1 or 2. The case of m=1 denotes monosubstitution, and the case of m=2 denotes disubstitution. In this case, R
3
may be a substituent at any position if it is on the cyclohexyl group. In addition, one kind of substituent may exist in one or more places, or at least two kinds of substituents may exist in one or more places. Examples of R
3
, which is an organic residue, include linear, branched, or cyclic alkyl groups having 1 to 10 carbon atoms, hydroxyalkyl groups having 1 to 5 carbon atoms, alkoxyalkyl groups having 1 to 5 carbon atoms, acetoxyalkyl groups having 1 to 5 carbon atoms, and halogenated (e.g. chlorinated, brominated, or fluorinated) alkyl groups having 1 to 5 carbon atoms. Favorably used of them are alkyl groups having 1 to 4 carbon atoms, hydroxyalkyl groups having 1 to 2 carbon atoms, alkoxyalkyl groups having 1 to 2 carbon atoms, and acetoxyalkyl groups having 1 to 2 carbon atoms. As is mentioned above, the above R
3
may be a substituent at any position if it is on the cyclohexyl group, but favorably the position of R
3
is the 3- or 4-numbered position. However, the above R
3
is defined as not including the epoxy-substituent structure which is seen in such as 3,4
Nakamura Kazuhiko
Takahashi Kunio
Yokota Yoshiyuki
Yoshida Masaya
Nippon Shokubai Co. , Ltd.
Roylance Abrams Berdo & Goodman L.L.P.
Short Patricia A.
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