Products obtained from the reaction of amine-diol and a polyfunc

Details Products obtained from the reaction of amine-diol and a polyfunc Products obtained from the reaction of amine-diol and a polyfunc

1993-06-23

1994-09-20

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

O-containing organic compound

106 1405, 106 1415, 106 1416, 10628723, 10628725, 106499, 106506, C09D17508

Patent

active

053485785

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention concerns the field of electroapplicable paints. Its object is products obtained from the reaction of an amine-diol with a polyfunctional substance, said products having the character of a resin. Through the introduction of cationic groups, said resin can be put in the form of an aqueous dispersion which can be employed directly as an additive in an electroapplicable cationic paint composition.


PRIOR ART

The technique for forming a paint or varnish by electrodeposition from a bath of suitable chemical composition is known to a person skilled in the art. There are many bibliographic and patent references on such a subject. Illustrations in the field of the invention are provided by U.S. Pat. Nos. 4,689,131 and 4,810,535, which were recently granted, and which describe additives intended to improve the appearance of coatings obtained by electrodeposition. Such a technique finds wide application in the automotive industry. In fact, vehicle bodies are routinely coated with a paint or a varnish by electrodeposition.
At the present time, there is an intensified search for sheet metal which has good corrosion resistance, and this leads to the selection of special ferrous alloys and of enamel compositions which are further improved in comparison with those already available. For example, it has been found that iron/zinc alloys are suitable for the production of sheet metal having good corrosion resistance. It is known, nevertheless, that this type of sheet metal, in particular, is difficult to treat by the electrodeposition technique if the end purpose is to produce a flawless surface coating. In particular, the appearance of pinholes or craters is observed, these being surface defects caused by the application of the potential difference needed for the electrodeposition (or electrophoresis). When sheet metal components, as in the case of vehicle car bodies, have areas that are accessible with difficulty, there is a tendency to increase the voltage applied to make certain that the whole of the body will be provided with a suitable coating. By this very fact, the risk of pinholes is increased, these being, in fact, attributable to small electric arcs initiated at the metal substrate and passing through the surface coating.
The presence of a perfectly continuous electrophoretic coating is obviously eminently desirable, not only for corrosion resistance but also for a property commonly known as `gravel impact resistance`, which reflects the ability of the metal parts of the vehicle to withstand the impact of a wide variety of objects, to which these areas may be subjected when the vehicle is used.
Compounds of the amine-diol type are known in the prior art. Such compounds have already been used, for example, to impregnate fabrics to give them gloss. This application was the subject of patent application EP-79.103.847 (Publication No.EP-11.130). The products described in this document are low-polymerized amine-diols.
U.S. Pat. No. 4,001,329 concerns a product obtained from the reaction between an aniline, formaldehyde and diethanolamine. The product is used for the production of polyurethane foam. The compound obtained is a polyol containing free hydroxyl groups.
U.S. Pat. No. 4,761,502 also concerns the preparation of amine-diols of which the hydroxyl groups are not substituted. The products are used as intermediates in the manufacture of dyes.
Other applications of amines substituted by aliphatic or aromatic groups are also described in the literature. Compounds of this type have been used to improve the performance of printing inks (Chemical Abstracts, Vol.97, No.22, 1982, abstract No.184.144.G), in the manufacture of pressure-sensitive copying paper (Chemical Abstracts, Vol.79, No.25, 1973, abstract No.151.696.P), and in cationic emulsions used as soil stabilizers (Chemical Abstracts, Vol.101, No.24, 1984, abstract No.215.560.X, and Chemical Abstracts, Vol.104, No.21, 1986, abstract No.185.507.C).
However, the products described in the prior art only have low molecul

REFERENCES:
patent: 3947338 (1976-03-01), Jerabek et al.
patent: 4001329 (1977-01-01), Bell
patent: 4031050 (1977-06-01), Jerabek
patent: 4281196 (1981-07-01), Rutzen et al.
patent: 4588840 (1986-05-01), Gurgiolo
patent: 4689131 (1987-08-01), Roue et al.
patent: 4761502 (1988-08-01), Kluger et al.
patent: 4810535 (1989-03-01), McCollum et al.
Chemical Abstracts, vol. 101, No. 24, 10 Dec. 1984, Abstract No. 215560x, D. Brodrecht et al, "Cationic Emulsion for Road Construction".
Chemical Abstracts, vol. 104, No. 21, 26 May 1986, Abstract No. 185507c, B. Keil et al, "Soil Stabilizers".
Chemical Abstracts, vol. 97, No. 22, 29 Nov. 1982, Abstract No. 184144g, Canon, K.K. "Jet Printing Inks".
Chemical Abstracts, vol. 79, No. 26, 31 Dec. 1973, Abstract No. 151696p, Maeda, S., "Desensitizer Compositions for Pressure-Sensitive Copying Paper".

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