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# (12) United States Patent 

# St. Clair et al. 

# (54) WATERBORNE DISPERSIONS OF EPOXIDIZED POLYDIENE BLOCK COPOLYMERS AND AMINO RESINS 

(75) Inventors: David John St. Clair, Houston; James Robert Erickson, Katy, both of TX (US) 

(73) Assignee: Shell Oil Company, Houston, TX (US) 

( *) Notice: This patent issued on a continued pros› ecution application filed under 37 CFR 1.53( d), and is subject to the twenty year patent term provisions of 35 U.S.C. 154(a)(2). 

(21) Appl. No.: 08/389,520 

(22) Filed: Feb. 16, 1995 

(62) Division of application No. 08/262,818, filed on Jun. 21, 1994, now abandoned. 

(51) Int. Cl.7 ............................ C08L 53/02; C08L 61/24; C08L 61/28 

(52) U.S. Cl. ......................... 523/416; 525/92 K; 525/314 

(58) Field of Search .............................. 525/92, 407, 416, 525/92 K, 314; 523/416 

## (56) References Cited 

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Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by O days. 

## Related U.S. Application Data 

## U.S. PATENT DOCUMENTS 

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# (10) Patent No.: US 6,248,810 Bl 

# *Jun.19,2001 (45) Date of Patent: 

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American Cyanamid Bulletin, "High Solids Amino Crosslinking Agents", 1990.* 

"Melamine/Formaldehyde Crosslinkers: Characterization, Network Formation ... ", D. Bauer, Prag. in Org. Coatings, 14, 1986, pp. 193-218. 

The Chemistry of Organic Film Formers by D. H. Solomon published by J. Wiley & Sons, 1986, Ch. 9, pp. 222-250. American Cyanamid Product Sheets, 1990. 

Fifty Years of Amino Coating Resins by Albert J. Kirsch published in 1986 by American Cyanamid Co. 

Journal of Coatings Tech., vol. 51, No. 656, pp. 61-70, Sep. 1979, "Reaction Mechanism of Melamine Resins". Journal of Coatings Tech., vol. 51, No. 658, pp. 101-110, Nov. 1979, "Chemistry of Glycouril-Formaldehyde Resins and Their ... ". 

Journal of Coatings Tech., vol. 52, No. 660, pp. 75-83, Jan. 1980, "Effect of Catalyst Structure on the Properties ... ". Cymel 303 Crosslinking Agent, published by American Cyanamid, 1990. 

High Solids Amino Crosslinking Agents, published by American Cyanamid, 1990. 

* cited by examiner 

Primary Examiner-Robert E. L. Sellers 

(74) Attorney, Agent, or Firm-Donald F. Haas 

## (57) ABSTRACT 

A crosslinkble waterborne dispersion useful as a coating on metal substrates of an epoxidized polydiene block polymer composition which comprises: (a) 10 to 65% by weight of a polydiene block polymer containing at least five olefinic epoxy groups per molecule which are sterically hindered, (b) 0.2 to 25% by weight of a compatible aminoplast, (c) 0.1 to 10% by weight of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. A water-continuous process and an inversion process for mak› ing a dispersion are also described. 

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US006248810Bl 

## FOREIGN PATENT DOCUMENTS 

## OTHER PUBLICATIONS 

## 18 Claims, No Drawings 

