Ralf Guether

6482913, Nov 19, 2002

Feb 7, 2000

09/499316

Peter H. Markusch - McMurray PA
Richard S. Pantone - New Martinsville WV
Ralf Guether - Pittsburgh PA
William E. Slack - Moundsville WV

Bayer Aktiengesellschaft - Leverkusen

C08G 1870

528 67, 25218222, 521160

This invention relates to liquid polyisocyanate compositions having improved freeze stability. These liquid polyisocyanate compositions have an NCO group content of 15 to 30%, and comprise (A) an allophanate-modified MDI and having an NCO group content of 16 to 32. 5%, (B) a low molecular weight branched aliphatic dihydroxy compound, and (C) an epoxide functional compound which is present in an amount of 0. 01 to 1% by weight, based on the combined weight of components (A) and (B).

6562932, May 13, 2003

Oct 12, 2001

09/976397

Peter H. Markusch - McMurray PA
Robert L. Cline - Paden City WV
Richard S. Pantone - New Martinsville WV
Ralf Guether - Pittsburgh PA
Thomas L. Sekelik - Carnegie PA
Karl W. Haider - McKees Rocks PA

Bayer Corporation - Pittsburgh PA

C08G 1810

528 58, 528 64, 528 85

This invention relates to a process for the production of an optically clear, light-stable polyurethane-urea elastomer having an onset softening point of at least 130Â C. , processed at ambient temperature and casted in a mold at an isocyanate index of 95 to 120. This process comprises reacting: A) a liquid polyisocyanate or polyisocyanate prepolymer having an NCO group content of about 5 to about 50%, an average functionality of 2 to 3, a viscosity of less than 5,000 mPa. s at 25Â C. ; and B) an isocyanate-reactive component; in the presence of C) at least one organometallic catalyst. The present invention also relates to the optically clear, light-stable polyurethane-urea elastomers produced by this process.

6582771, Jun 24, 2003

May 3, 2002

10/138995

Peter H. Markusch - Sannibel FL
Ralf Guether - Pittsburgh PA
LeRoy Payne - Pittsburgh PA, 15205-9741

Bayer Corporation - Pittsburgh PA
Leroy Payne - Molt MT

B05D 700

4273899, 4273934, 427136

The present invention is directed to a method for impregnating at least one geofabric with a liquid solidifiable polyurethane composition, conforming at least one polyurethane-impregnated geofabric to a surface (such as to the surface of a canal, ditch and/or pipe) and allowing the liquid solidifiable polyurethane composition to cure and form a polyurethane/geofabric composite. The liquid solidifiable polyurethane composition is the reaction product of COMPONENT A, COMPONENT B and COMPONENT C, as defined herein. COMPONENT C has the same equivalent weight as COMPONENT B and contains catalyst. One advantage of the present invention is that the ratio of COMPONENT B to COMPONENT C can be adjusted during processing without changing the isocyanate index. As a result, geltimes of liquid solidifiable polyurethane compositions of the present invention can be adjusted to accommodate changes in outdoor application temperature.

6602025, Aug 5, 2003

Mar 15, 2001

09/809445

Peter H. Markusch - McMurray PA
Ralf Guether - Pittsburgh PA

Bayer Corporation - Pittsburgh PA

E16L 5518

4051842, 4051502, 4051841, 4051501, 138145, 524589, 524590

A surface of a canal, ditch or pipe is lined with a polyurethane/geofabric composite. A non-sagging polyurethane composition is applied to the canal, ditch or pipe surface, a geofabric is contacted with that surface in a manner such that the geofabric becomes impregnated with the non-sagging polyurethane composition which cures to form a polyurethane/geofabric composite. The non-sagging polyurethane is a reaction product of a polyisocyanate, a high molecular weight polyhydroxyl compound and a compound having at least 2 amino groups. A low molecular weight diol or triol, filler and catalyst are optional components. These composites are particularly useful in lining cracked or broken concave or angled surfaces.

6632875, Oct 14, 2003

Mar 15, 2001

09/809671

Peter H. Markusch - McMurray PA
Ralf Guether - Pittsburgh PA

Bayer Polymers LLC - Pittsburgh PA

C08J 300

524589, 4284231, 524590

A polyurethane-forming reaction mixture characterized by its ability to be adjusted with respect to its viscosity in response to changing temperature and humidity conditions is achieved with a mixture that includes a liquid polyisocyanate having an isocyanate group content of at least 10% by weight, an isocyanate-reactive component which includes at least one high molecular weight polyol, a urethane catalyst and from 0. 2 to 5 parts by weight per 100 parts by weight of isocyanate reactive component of a viscosity adjusting component. The viscosity adjusting component is preferably a diamine, a polyamine and/or an amine-terminated polyol. This reaction mixture is particularly useful for producing polyurethane geotextile composite materials useful as liners for ditches and canals.

6669407, Dec 30, 2003

Mar 15, 2001

09/809023

Peter H. Markusch - McMurray PA
Ashok Sarpeshkar - Upper St. Clair PA
Marylyn Donaldson - Coraopolis PA
W. Tracy Estabrook - Pittsburgh PA
Ralf Guether - Pittsburgh PA

Bayer Corporation - Pittsburgh PA

E02B 312

4051842, 405 36, 524590, 528 60, 528 61

A water-resistant polyurethane geotextile composite suitable for use as a liner is made by impregnating a geotextile with a water-resistant polyurethane and allowing the polyurethane impregnated in the geotextile to cure. The water-resistant polyurethane composition is a reaction product of (a) a liquid polyisocyanate having an isocyanate content of at least 10% by weight, (b) an isocyanate-reactive component which includes (1) 20-90% by weight castor oil having a water content of less than 0. 5% by weight, and (2) a polyether polyol in which at least 70% by weight of the alkylene oxide is propylene oxide, and (c) a urethane catalyst. Low molecular weight diols and triols and fillers may optionally be included.

6706776, Mar 16, 2004

Jun 18, 2002

10/174224

Peter H. Markusch - Sanibel FL
Ralf Guether - Pittsburgh PA
Tom L. Sekelik - Carnegie PA

Bayer Corporation - Pittsburgh PA

C08J 934

521170, 1381181, 138141, 138145, 4284258, 521 54, 521 99, 521124, 521126, 521127, 521137, 521174, 523218, 523219

This invention relates to syntactic foams comprising the reaction product of a liquid diphenylmethane diisocyanate component, with an isocyanate-reactive component, a filler having a density of less than 1 g/cm 3, and at least one organo-metallic catalyst. This invention also relates to the use of these syntactic foams for insulating pipes.

6786680, Sep 7, 2004

Mar 15, 2001

09/809453

Peter H. Markusch - McMurray PA
Ralf Guether - Pittsburgh PA

Bayer MaterialScience LLC - Pittsburgh PA

B05D 302

405270, 405264, 4053027, 427136, 4273722, 4273855, 4284231, 524590, 528 44, 528 61, 528 65, 528 85

Seams are sealed and surface defects are repaired in a polyurethane/geotextile composite applied over concrete, an earthen canal or a ditch with a non-sagging polyurethane composition. This non-sagging polyurethane composition is a reaction product of a polyisocyanate, a high molecular weight polyhydroxyl compound, and a compound containing at least two amino groups. A low molecular weight diol or triol, a catalyst and a filler are optionally included in the polyurethane-forming reaction mixture.