Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-01-07
1998-11-24
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525100, 525104, 525106, 525199, 525207, 525208, 525217, 525218, 525220, 525221, 525222, 525231, 525438, 525439, 525440, 525443, 525444, 5254445, 525445, 525446, 525454, 525455, 525456, 525457, 525458, 525461, 525476, 525477, 525478, 525479, C08L 3302, C08L 3314, C08L 4304, C08L 6120, C08L 6300, C08L 6702, C08L 7504, C08L 8306
Patent
active
058408061
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to novel and useful, curable resin compositions. More precisely, it relates to novel, curable resin compositions with high practicability, which can be cured into crosslinked products having good durability, acid resistance and scratch resistance and which comprise (A) a resin to be obtained by condensation of a polymer having both a hydrolyzable silyl group and a functional group except such a hydrolyzable silyl group, and a polysiloxane having a hydroxyl group bonded to a silicon atom and/or a hydrolyzable group bonded to a silicon atom, and (B) a compound having a functional group capable of reacting with the functional group contained in the resin (A), and optionally (C) a curing catalyst.
Such novel, curable resin compositions of the present invention are widely used, for example, in top-coating compositions for cars and coating compositions for exterior walls of constructions, which are required to have high durability, acid resistance and scratch resistance, and also in heat-resistant coating compositions, adhesives, ink compositions, compositions to be infiltrated into fibers and paper, and surface-treating compositions.
BACKGROUND ART
Various curable resin compositions capable of being cured into cured products with good durability have heretofore been widely used, which comprise various resin components such as acrylic polymers, polyester resins or alkyd resins having a so-called functional group such as a hydroxyl group, a carboxyl group or an amino group, and various curing agents such as polyisocyanate resins, epoxy resins or amino resins.
However, the cured resin films obtained from such conventional, curable resin compositions have poor durability since their gloss and water repellency are easily lowered after outdoor exposure. Therefore, the conventional compositions have a problem that they could not be almost applied to the objects that are required to have high durability.
If the conventional compositions are used for the top coats of cars, the top coats will be relatively easily etched by acid rain, and will be even relatively easily damaged by automatic car washers.
Accordingly, it is impossible to obtain cured resin films with high practicability including good durability, acid resistance and scratch resistance, from such conventional, curable resin compositions. Given the situation, therefore, it is strongly desired to develop novel, curable resin compositions capable of forming cured films having good durability, such as good gloss retention and good water repellency retention even after outdoor exposure, and further having good acid resistance and good scratch resistance.
In consideration of these, we, the present inventors have assiduously studied to obtain curable resin compositions with high practicability that can form cured films having good durability, acid resistance and scratch resistance.
Accordingly, the subject matter of the present invention is to provide novel, curable resin compositions with high practicability, which can form cured films having especially good durability, acid resistance and scratch resistance.
DISCLOSURE OF THE INVENTION
In consideration of the current situation as mentioned above and in order to attain the subject matter of the present invention as mentioned above, we, the present inventors have assiduously studied and, as a result, have found that (i) a curable resin composition comprising (A) a resin obtained by condensation of a polymer having both a hydrolyzable silyl group and a functional group except such a hydrolyzable silyl group, and a particular polysiloxane, and (B) a compound having a functional group capable of reacting with the functional group attached to the resin (A), or (ii) a curable resin composition comprising (A) a resin obtained by condensation of a polymer having both a hydrolyzable silyl group and a functional group except such a hydrolyzable silyl group, and a particular polysiloxane, and (B) a compound having a functional group capable of reacting with the functional g
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patent: 5087286 (1992-02-01), Fukuda et al.
patent: 5102960 (1992-04-01), Imai et al.
patent: 5330796 (1994-07-01), Kasari et al.
patent: 5362521 (1994-11-01), Ozaki et al.
patent: 5498666 (1996-03-01), Nambu et al.
patent: 5530063 (1996-06-01), Nagai et al.
Komazaki Shigeru
Kudo Shin-ichi
Ooka Masataka
Dainippon Ink and Chemicals Inc.
Sellers Robert E.
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