Robert Garrett Cline

US Patent:

20050066697, Mar 31, 2005

Filed:

Sep 30, 2003

Appl. No.:

10/675536

Inventors:

Robert Cline - Paden City WV, US
Peter Markusch - Sanibel FL, US
Ralf Guether - Bergisch Gladbach, DE

International Classification:

C05C009/00

US Classification:

071028000

Abstract:

This invention relates to polyurethane(urea) encapsulated fertilizer particles which exhibit slow-release properties and to a process for their production. In one embodiment, the process comprises a) applying a polyisocyanate component to fertilizer particles to form isocyanate coated fertilizer particles, b) mixing an inert inorganic filler with said isocyanate coated fertilizer, c) adding an isocyanate-reactive component to the mixture of step b) and d) allowing the reactive components to react to form filler containing polyurethane(urea) encapsulated fertilizer particles containing from about 1 to about 15 percent by weight of filled polyurethane(urea), said percent by weight based on the total weight of the encapsulated fertilizer, with the proviso that the weight ratio of polyurethane(urea) to filler is from about 80:20 to about 30:70.

US Patent:

60400285, Mar 21, 2000

Filed:

Jan 13, 1998

Appl. No.:

9/006129

Inventors:

Robert L. Cline - Paden City WV
James W. Rosthauser - Glendale WV
Peter H. Markusch - McMurray PA

Assignee:

Bayer Corporation - Pittsburgh PA

International Classification:

C09J 702

US Classification:

428 418

Abstract:

The present invention relates to highly elastic polyurethane contact adhesives, a process to coat substrates with these contact adhesives, and the coated substrates produced by this process. This invention requires a) a polyisocyanate with a functionality of less than about 4 and b) a polyol blend comprising 1) about 90 to 100% polyethers with molecular weights from about 1,800 to 12,000 and average functionality from about 1. 5 to about 4, and 2) up to about 10% of chain extenders with molecular weights from about 60 to 400 and average functionality from about 1. 5 to about 3. The functionalities and amounts of components a) and b) are such that the molecular weight between crosslinks is from about 7,000 to about 16,000 and the equivalent ratio of isocyanate groups to isocyanate-reactive groups is from about 80:100 to about 120:100 and the urethane group content is from about 1 to about 8%. It is preferred that at least one of components a) and b) have a functionality of greater than about 2. 2.

US Patent:

57339660, Mar 31, 1998

Filed:

Jan 22, 1997

Appl. No.:

8/787066

Inventors:

Robert L. Cline - Paden City WV
James W. Rosthauser - Glendale WV
Peter H. Markusch - McMurray PA

Assignee:

Bayer Corporation - Pittsburgh PA

International Classification:

C08J 300
C08K 320
C08L 7500
C08G 1800

US Classification:

524590

Abstract:

The present invention relates to highly elastic polyurethane contact adhesives, a process to coat substrates with these contact adhesives, and the coated substrates produced by this process. This invention requires a) a polyisocyanate with a functionality of less than about 4 and b) a polyol blend comprising 1) about 90 to 100% polyethers with molecular weights from about 1,800 to 12,000 and average functionality from about 1. 5 to about 4, and 2) up to about 10% of chain extenders with molecular weights from about 60 to 400 and average functionality from about 1. 5 to about 3. The functionalities and amounts of components a) and b) are such that the molecular weight between crosslinks is from about 7,000 to about 16,000 and the equivalent ratio of isocyanate groups to isocyanate-reactive groups is from about 80:100 to about 120:100 and the urethane group content is from about 1 to about 8%. It is preferred that at least one of components a) and b) have a functionality of greater than about 2. 2.

US Patent:

57262403, Mar 10, 1998

Filed:

Nov 25, 1996

Appl. No.:

8/755925

Inventors:

James W. Rosthauser - Glendale WV
Robert L. Cline - Paden City WV
Richard S. Pantone - New Martinsville WV

Assignee:

Bayer Corporation - Pittsburgh PA

International Classification:

C08K 300
C08K 320
C08L 7500
C07C24900

US Classification:

524590

Abstract:

This invention relates to mixtures of polymethylene poly(phenylisocyanate) blends with epoxides. The addition of the epoxide stabilizes the reactivity of the polyisocyanate blends such that it is no longer dependent on the acidity. It is now possible to form polyurethanes from these mixtures based on polymethylene poly(phenylisocyanate) blends wherein less catalyst is necessary.