Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-07-22
2000-08-15
Reddick, Judy M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523400, 523408, 523409, 523410, 523411, 523412, 523427, 523433, 523434, 523435, 523437, 523456, 524114, 524263, 524265, 524266, 524517, 524520, 524521, 524531, 524533, 524535, 524268, 524269, C08K 51515
Patent
active
061037885
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a novel and useful curable resin composition for use in water-based coating materials, and more specifically, to a curable resin composition for use in a water-based composition which includes as coat-forming components at least an emulsion polymer containing a specific tertiary amino group and a compound having an epoxy group and a hydrolyzable silyl group. This curable resin composition for use in water-based coating materials is not only superior with respect to its workability and curing properties, but also provides a cured coating with excellent resistance to weathering, solvents, chemicals, and water. Accordingly, this composition is particularly useful when applied in coating materials.
BACKGROUND ART
Fueled by such demands worldwide as protection of the environment and an improvement in workplace conditions in recent years, it has become necessary to move away from conventional coating materials containing organic solvents, to coating materials which release little organic solvent into the atmosphere. In addition, from the perspective of energy conservation, as well, the development of a type of coating resin which form crosslinking at ordinary temperature has been particularly attractive.
A composition of a water-based emulsion composition consisting of a copolymer composed of an unsaturated monomer of the ethylene family and an aminoalkyl(meth)acrylate having a primary or secondary amino group, and a epoxy silane coupling agent has been proposed heretofore (Japanese Patent Application, First Publication No. Sho 61-28543). However, the cured coating obtained from this composition has been problematic in that it tends to be inferior with respect to its weather resistant properties and the like.
Accordingly, the present inventors began extensive research aimed at developing a composition which would resolve the aforementioned problems encountered in the conventional art, while also meeting the various demands of the coating industry as described above.
Therefore, the present invention has as an objective for the provision of a curable resin composition for use in water-based coating materials which is novel and has an extremely high degree of utility, the composition having excellent workability and curing properties, while containing little or no organic solvent as compared to conventional organic solvent-based coatings, and moreover, offering a cured coating which is superior with respect to resistance to weathering, solvents, chemicals and water.
Additionally, in view of energy conservation, it is also an objective of the present invention to provide a novel curable resin composition for use in water-based coating materials with a high degree of utility, which can form crosslinking at ordinary temperature.
DISCLOSURE OF INVENTION
As a result of exhaustive research to resolve the above-described problems, the present inventors completed the present invention upon the discovery that a composition comprising an emulsion polymer (A) containing tertiary amino groups which is obtained by carrying out emulsion polymerization of a vinyl monomer containing a tertiary amino group and another copolymerizable vinyl monomer in a water-based medium, and a compound (B) containing, at least, an epoxy group and a hydrolyzable silyl group, has superior coating properties and provides a cured coating with excellent resistance to weathering, yellowing from heat, solvents, chemicals, dirt shedding, and water, while enabling a reduction in the amount of organic solvent contained therein.
Accordingly, the first objective of the present invention is the provision of a curable resin composition for use in water-based coating materials, characterized in including an emulsion polymer (A) containing tertiary amino groups which is obtained by carrying out emulsion polymerization of a vinyl monomer containing a tertiary amino group and another copolymerizable vinyl monomer in a water-based medium, and a compound (B) containing, at least, an epoxy group and a hydrolyzabl
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patent: 5399601 (1995-03-01), Kusumi et al.
Harui Nobuo
Nakamura Hidehisa
Yamamoto Akifumi
Dainippon Ink and Chemicals Inc.
Reddick Judy M.
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