Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-07-20
2000-09-19
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
524386, C08G 6532
Patent
active
061213861
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a resin composition for coating, more particularly to a resin composition for coating which is suitable as a surface coating material capable of improving the coatability or printability of the surfaces of films, sheets, or molded products containing as base materials a variety of plastics, inter alia, olefin resins or low-polarity polymers, or suitable as a binder for inks or coatings applied to surfaces.
BACKGROUND ART
Olefin resins such as polypropylene, polyethylene, ethylene-propylene copolymers, and ethylene-propylene-conjugated diene copolymers and low-polarity polymers such as styrene-butadiene copolymers and hydrogenated products thereof are extensively used for a variety of end uses such as electrical parts and automobile parts, in that they are inexpensive and have excellent properties such as chemical resistance and moldability.
However, when these low-polarity polyolefins are incorporated into coatings or inks so as to carry out coating or printing in order to protect a surface, to face, to record, etc., the resultant coatings or inks exhibit poor adhesion properties. In order to solve this problem, there are proposed use of a primer primarily containing modified polyolefins such as maleic anhydride-grafted hydrogenated styrene-butadiene block copolymers or maleic anhydride-grafted chlorinated polypropylene, and coatings containing a binder in which these modified polyolefins are incorporated. However, these grafted modified resins do not always provide satisfactory performance of resulting coating films in terms of low-temperature impact resistance or pigment dispersibility, and moreover, they do not always provide sufficient adhesion to polar resins. These drawbacks hamper application of the grafted modified resins to the field of adhesives, etc.
In view of the foregoing, there is strong demand for development of resin compositions for coating which exhibit stable and excellent adhesion to plastics, particularly to olefin resins, and which provide various advantages: affording coating films exhibiting excellent low-temperature impact resistance when used as a primer; permitting excellent pigment dispersion; exhibiting excellent adhesion to a variety of plastics; and being widely applicable to more extensive uses such as coatings, inks, and binders for adhesives. In the present invention, the word "for coating" connotes a broad concept and covers not only the above-described coatings but also inks and adhesives.
DISCLOSURE OF THE INVENTION
The present inventors have found that the above-described problems are solved by a resin composition for coating containing a specific epoxidized block copolymer and an organic compound carrying a functional group reacting with an epoxy group and having a number-average molecular weight of from 150 to 150,000, and an optional epoxy ring opening promoter. The present invention was accomplished based on this finding.
Accordingly, the present invention provides a resin composition for coating containing a specific epoxidized block copolymer (A) and an organic compound (B) carrying a functional group reacting with an epoxy group and having a number-average molecular weight of from 150 to 150,000, wherein the weight ratio (A)/(A+B) ranges from 1/100 to 99/100. The present invention also provides a resin composition for coating containing a specific epoxidized block copolymer (A), an organic compound (B) carrying a functional group reacting with an epoxy group and having a number-average molecular weight of from 150 to 150,000, and an epoxy ring opening promoter (C), wherein the weight ratio (A)/(A+B) ranges from 1/100 to 99/100 and the content of the above component (C) ranges from 0.1 to 10 parts by weight per 100 parts by weight of (A+B). The present invention specifically provides a resin composition for coating as described above wherein the functional group of the organic compound which serves as the component (B) is a hydroxyl group. The present invention specifically provides a resin composition for
REFERENCES:
patent: 5334662 (1994-08-01), Ochi
patent: 5382604 (1995-01-01), Erickson
patent: 5449718 (1995-09-01), Erickson
patent: 5491193 (1996-02-01), Erickson
patent: 5567781 (1996-10-01), Martino
patent: 5686535 (1997-11-01), Erickson
Ohtsuka Yoshihiro
Oshino Yoshihiro
Daicel Chemical Industries Ltd.
Michl Paul R.
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