Title: Tertiary alcohol-diblocked diisocyanate diurea oligomers and coating compositions comprising same

Abstract: This invention provides polymer forming resin systems and high solids solvent based chain-extendable, crosslinkable coating compositions comprising same. The invention comprises a polyepoxide, preferably a diepoxide, of molecular weight between about 100 and about 1000 used generally in amounts from about 10% to about 50% by weight of total resin, and novel diblocked diisocyanate diurea oligomers of molecular weight between about 300 and about 5000. The resin components provide chain-extension polymerization during cure at elevated temperature, in situ, on the surface of a substrate. The resin system is self-crosslinking. That is, no additional crosslinking component is required. The cured coatings of the invention provide greatly improved physical properties, in particular greatly improved corrosion resistance.

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Inventors: Holubka, Joseph W. (Livonia, MI)

Application Number: 06/334792
Filing Date: 1981-12-28
Publication_date: 1983-12-27
Assignee: FORD MOTOR CO (US)

Primary Class(es): 523/454 523/400, 524/361, 524/379, 528/45, 525/528, 524/589,
Other Classes: C09D5/46; C08G18/28; C08K5/07; C08L63/00; C08K5/05
US Patent Ref:

2511544	June, 1950	Rinke et al.	528/85	Diol-dilsocyanate high molecular polymerization products
3245961	April, 1966	Feischer et al.	528/45	Polyureas from caprolactamblocked isocyanates
3779994	December, 1973	Wood	528/71
3931115	January, 1976	Strassel	528/64	Process of spraying polyurethane-polyurea compositions and applications thereof
3931116	January, 1976	Bernstein et al.	528/49	Curable amine-terminated polyurethane-urea-epoxide lacquers
3939126	February, 1976	Carder et al.	528/75	Acrylyl-terminated urea-urethane compositions
4031050	June, 1977	Jerabek	525/528	Cationic electrodepositable compositions of blocked NCO and acid salt of adduct of amine and polyepo
4036906	July, 1977	Finelli	528/61	Cured polyurethane compositions containing epoxy resins
4111917	September, 1978	Larsen	525/528	Use of latent amines to cure epoxy resins
4134866	January, 1979	Tominaga et al.	528/45	Aqueous cationic coating from amine-epoxy adduct, polyamide, and semi-blocked polyisocyanate, acid s
4192932	March, 1980	Dickie et al.	525/511	Alkaline resistant organic coatings for corrosion susceptible substrates IV
4239878	December, 1980	Kobayashi et al.	528/45	Process for preparing cationic electrodeposition-coating resin using monofunctional blocking agents
4338423	July, 1982	Holubka	525/511	Alkaline resistant organic coatings for corrosion susceptible substrates I

Other Refs: GB709288

May, 1954

528/45

Primary Examiner: Griffin, Ronald W.
Assistant Examiner:
Attorney: Mcdermott, Peter D.
May, Roger L.

Claims: