David C Mcclurg

US Patent:

55168736, May 14, 1996

Filed:

Jul 11, 1994

Appl. No.:

8/273551

Inventors:

Sharon D. Hicks - Pittsburgh PA
Douglas A. Wicks - Mt. Lebanon PA
Edward P. Squiller - Pittsburgh PA
David C. McClurg - Pittsburgh PA
Terrell D. Wayt - Moundsville WV
Robert A. Wade - Carnegie PA

Assignee:

Bayer Corporation - Pittsburgh PA

International Classification:

C08G 1808
C08G 1828
C08G 1870
C08G 1872

US Classification:

528 60

Abstract:

The present invention relates to a coating composition which is free from polyols and contains a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde and c) a compound containing aspartate groups, wherein components a), b) and c) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups and aspartate groups of 0. 5:1 to 20:1 and wherein component c) is present in an amount sufficient to form a clear solution within 60 minutes of mixing components a), b) and c), provided that the amount of component c) is at least 5% by weight, based on the weight of components b) and c). The present invention also relates to a polyurea coating prepared from this coating composition.

US Patent:

52506509, Oct 5, 1993

Filed:

Mar 27, 1992

Appl. No.:

7/858822

Inventors:

Leon N. Boretzky - Wexford PA
Kurt E. Best - Pittsburgh PA
David C. McClurg - Carnegie PA
Angela I. Wallace - Aliquippa PA

Assignee:

Miles Inc. - Pittsburgh PA

International Classification:

C08G 1870

US Classification:

528 67

Abstract:

A polyurethane coating which is chip resistant and resistant to chemical decontamination treatments which is made by reacting one component made up of isocyanate-reactive materials and a second isocyanate component. The first component includes an aromatic polyamine (preferably an aromatic diamine) and a hydroxyl terminated polyether or polyester in amounts such that the equivalent ratio of amine to hydroxyl groups is from about 80:20 to about 97:3. The second isocyanate component includes an aromatic polyisocyanate or a prepolymer of an aromatic polyisocyanate and a polyisocyanate adduct formed from either toluene diisocyanate or an aliphatic polyisocyanate in amounts such that the ratio of aromatic polyisocyanate to polyisocyanate adduct is in the range of from about 50:50 to about 75:25. Each of these components is combined, preferably in the presence of a solvent in quantities such that the equivalent ratio of isocyanate groups to isocyanate-reactive groups is in the range of from about 1. 1 to about 1.