Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1998-07-07
2000-09-12
Krynski, William
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428403, 428457, 428688, C03B 802
Patent
active
061175439
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to reactive particles useful as a filler or additive for a resin or resin composition, an additive or crosslinking agent for a paint composition, a viscosity-control agent, a resist material, a carrier used in a medicine, an additive for a cosmetic, etc., and the method for producing the same.
BACKGROUND ART
It is known that various particulate substances such as organic particulate substances (e.g. thermoplastic resins such as methacrylate and polystyrene which may be crosslinkable, thermosetting resins such as silicone resin) or inorganic particulate substances (e.g. silica, mica, talc, diatomaceous earth, calcium carbonate, silicon oxide, aluminumoxide, titanium oxide, aluminum hydroxide, etc.) are added, as an additive or filler, to a resin composition or paint composition in order to improve the characteristics of molded articles or coating layers. However, when the affinity between such a particulate substance and a resin deteriorates, the mechanical strength of the molded articles or coatings also deteriorates considerably. As a result, the species of a particulate substance is greatly restricted by the species of a resin to be used.
A particulate substance treated with a surface-treating agent has also been used to improve the affinity of the particulate substance. For example, there are known particulate substances such as particulate substances treated with resin, particulate substances treated with surface-treating agent, particulate substances treated with a surfactant, or the like. These particulate substances, however, are not reactive, and give limitation for improvements in mechanical and chemical properties of molded articles or coatings.
In Japanese Patent Application Laid-open No. 184224/1994, there is disclosed a method for producing reactive particles by reacting a polymer having a functional group containing an active hydrogen atom such as carboxyl group at an end or a side chain of a hydrophobic principal chain (e.g. modified olefinic polymers) with an oxazoline. Addition of a small quantity of such reactive particles obtained by this method to polymer compositions mutually incompatible is advantageous for obtaining a polymer alloy. The reactive particles recited in this reference, however, do not function well because of their relatively large particle size and being not containing many active sites.
Accordingly, an object of the present invention is to provide reactive particles each having a number of active sites and the method for producing the same.
An another object of the present invention is to provide reactive particles able to function effectively as a crosslinking agent or carrier even in small quantities.
A further object of the present invention is to provide reactive particles having high activity in spite of their being ultra-fine particulates each having a remarkably small mean particulate size.
DISCLOSURE OF INVENTION
The inventors of the present invention did intensive research, and finally found that a reactive particle having a number of active sites can be obtained by reacting a particulate carrier having a reactive group with a compound having a functional group such as bisoxazoline in order to introduce the functional group.
Namely, the reactive particle of the present invention is represented by the following formula (I):
wherein A is a carrier particle, C is an organic group having at least one free functional group, D is a hydrophilic or hydrophobic organic group, B1 is an organic group connecting the carrier particle A to the organic group C, B2 is an organic group connecting the carrier particle A to the hydrophilic or hydrophobic organic group D, n is an integer of not less than 1, m and p are 0 or 1, q is 0 or an integer of not less than 1, and m and p may differ in accordance with n and q respectively.
The carrier particle A may be selected from organic or inorganic particles, for example, from polymers, metals, carbons, metal compounds, ceramics, etc. The free functional group of the organic group C
REFERENCES:
patent: 5304243 (1994-04-01), Yamaguchi et al.
Dewert Abstract No. 91-130220, dated Mar. 26, 1991.
Dewert Abstract No. 89-181493, dated May 11, 1989.
Chow Tak Yuen
Kambara Hajime
Sato Kazuyuki
Zaima Hiroaki
KRI International, Inc.
Krynski William
Shewareged B.
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