Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-02-17
1995-02-07
Yoon, Tae H.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524805, 524806, 524811, 524815, 524458, 523201, 523202, 523203, 525254, 525259, 525902, C08L 3700, C08L 5106, C08L 8300
Patent
active
053876431
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to composition of a cationic micro-emulsion employed for top coat material for paint, sealer, and the like, and its preparation method.
BACKGROUND OF THE INVENTION
Heretofore, solvent type resin composition wherein synthetic resin is dissolved in organic solvent has been employed as material to form a film by applying on a surface of base materials. However, said solvent type resin composition has hygienic and safety problems, and compositions of a water soluble emulsion is employed as a substitute. Particularly, in order to obtain composition of a cationic micro-emulsion which has crosslinking property at an ordinary temperature and contains particles which have a diameter of not more than 0.1 .mu.m so that a close film can be formed and a glossiness can be obtained, the following methods have been suggested (1) a preparation method for micro-emulsion composition wherein a large amount of emulsifier is used to copolymerize crosslinking type monomer, and (2) a method wherein micro-gel fine particle synthesized by emulsion polymerization employing compound containing quaternary ammonium salt as an emulsifier is reacted with compound containing a reactive functional group.
However, in the first method, a large amount of emulsifier is required for micro-emulsion, thus, the obtained cationic micro-emulsion composition has a disadvantage of considerable deterioration in waterproof. In the second method, there are also disadvantages, that is to say, waterproof of the obtained micro-emulsion composition is not high enough, and when a compounding ratio of the reactive functional group is increased in order to improve the waterproof, agglutinated substance occurs during polymerization, which expands a diameter of micro-emulsion particle and makes it hard to form a glossy film.
OBJECT OF THE INVENTION
Accordingly, it is an object of the present invention to provide composition of a cationic micro-emulsion superior in adhesion to base materials, waterproof, weatherproof, and contamination resistance having a glossiness, and its preparation method.
SUMMARY OF THE INVENTION
The first embodiment of the present invention is directed to an aqueous cationic micro-emulsion comprising cationic particles having a two-layer structure, said structure consisting of 100 parts of an inner component (B) protected with an outer film of 10 to 100 parts of component (A), wherein component (A) is a water soluble resin comprising a copolymer of represented by the following constitutional formula: ##STR1## where R.sub.1 : --H or --CH.sub.3 ; may be the same or different; ##STR2## X, Y: A halogen atom of F, Cl or Br; (b) a structural unit comprising an alkoxysilane monomer containing at least one reactive group selected among a vinyl group, an acryl group, and a methacryl group; and that (a) occupies not less than 5% by weight relative to the total quantity of component (A), (b) occupies not less than 0.5% by weight relative to the total quantity of component (A), and (c) occupies not more than 94.5% by weight relative to the total quantity of component (A); and Wherein (B) is a copolymerized resin derived from: least one reactive group selected among a vinyl group, an acryl group, and a methacryl group, and that (d) occupies not less than 0.5% by weight relative to the total quantity of component (B), and (e) occupies not more than 99.5% by weight relative to the total quantity of component (B).
Also, a second embodiment of the present invention is directed to a preparation method for composition of a cationic micro-emulsion comprising a process for preparing water soluble resin in aqueous medium by copolymerizing component (a), component (b), and component (c) defined below, a process for preparing copolymerized resin by copolymerizing component (d) and component (e) defined below, and a process for compounding said water soluble resin at the rate of 10 to 100 parts by weight corresponding to every 100 parts by weight of said copolymerized resin, and preparing the compositio
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Dec Ellen T.
National Starch and Chemical Investment Holding Corporation
Yoon Tae H.
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