1
Dietmar Schapel, Heinz Dieter Ebert, Hartwig Grammes: Gel compounds, their production and use. Bayer Aktiengesellschaft, Sprung Horn Kramer & Woods, November 8, 1994: US05362834 (49 worldwide citation)

Improved gel compounds based on reaction products of polyols and polyisocyanates are characterized in that the polyol component consists of a mixture of a) one or more polyols having hydroxyl values below 112 and b) one or more polyols having hydroxyl values of 112 to 600 and in that the isocyanate ...


2
Peter Haas, Geza Avar, Hartwig Grammes: Use of polyhydroxyalkyl monoureas for polyurethane foams, dispersions of the polyhydroxyalkyl monoureas in polyols and new tris-hydroxyalkyl monoureas. Bayer Aktiengesellschaft, Gene Harsh, Joseph C Gil, October 8, 1985: US04546121 (8 worldwide citation)

This invention relates to the use of mono- to tetrahydroxyalkyl monoureas corresponding to the following general formula ##STR1## in which A represents a C.sub.2 -C.sub.6 -alkylene group optionally containing OH-groups,


3
Peter Haas, Dirk Wegener, Hartwig Grammes: Activators for the production of polyurethane foams. Bayer Aktiengesellschaft, Joseph C Gil, Lyndanne M Whalen, July 6, 2004: US06759363 (4 worldwide citation)

Activators with reduced volatility that are liquid at room temperature are obtained as the reaction product of (A) a secondary amine or primary alcohol having at least one tertiary amine group, (B) a polyisocyanate of the diphenylmethane series having a functionality of from 2.5 to 4.0 and an OH-fun ...


4

5
Christian Weber, Hartwig Grammes: Process for producing integral skin molded foams. Bayer Aktiengesellschaft, Joseph C Gil, N Denise Brown, August 30, 1994: US05342856 (2 worldwide citation)

The use of solutions of zinc carboxylates having 8 to 24 carbon atoms in aliphatic polyamines having molecular weights of from 131 to 500 having a total of 2 or 3 primary, secondary and/or tertiary amine nitrogen atoms as additives for the formation of a compact surface in the production of molded f ...


6
Peter Haas, Geza Avar, Hartwig Grammes: Polyhydroxyalkyl polycarbonamides for the production of flame-resistant polyurethane rigid foams and integral foams. Bayer, Gene Harsh, Joseph C Gil, September 10, 1985: US04540626 (1 worldwide citation)

The invention relates to the use of poly-N,N-di-(hydroxyalkyl)-polycarbonamides of aliphatic or cycloaliphatic polycarboxylic acids as reactive flame-retardants for polyurethane foams, and in particular polyurethane integral skin foams and polyurethane rigid foams which are produced with the aid of ...


7
Peter Haas, Rolf Roers, Hartwig Grammes: Plastic composite elements and a process for the production thereof. Bayer MaterialScience, Lyndanne M Whalen, John E Mrozinski Jr, September 25, 2007: US07273656 (1 worldwide citation)

The invention provides composite elements containing a thermoplastic polymer layer, adhering to a layer comprising the reaction product of a reaction mixture containing a prepolymer containing isocyanate groups produced by the reaction of at least one isocyanate and one polycarbonate polyalcohol wit ...


8
Ulrich Liman, Dirk Wegener, Hartwig Grammes: Process for the preparation of composite bodies. Bayer Aktiengesellschaft, Joseph C Gil, August 29, 1995: US05445879 (1 worldwide citation)

The present invention is directed to an improved process for the preparation of composite bodies by back-foaming plastics sheets with a polyurethane reaction mixture. The improvement is in using certain hydroxycarboxylic acids present in the alkali salt form as the catalyst.


9
Peter Haas, Catherine Lövenich, Hartwig Grammes: Plastic composite elements and a process for the production thereof. Bayer MaterialScience, Connolly Bove Lodge & Hutz, August 2, 2011: US07989516

The present invention relates to composite elements containing, as a layer, at least one thermoplastic polymer, adhering to which, as a layer, a polyisocyanate polyaddition product is attached, and a process for the production thereof.


10
Peter Haas, Dirk Wegener, Hartwig Grammes: Activators for the production of polyurethane foams. Bayer Corporation, September 5, 2002: US20020123597-A1

Activators with reduced volatility that are liquid at room temperature are obtained as the reaction product of (A) a secondary amine or primary alcohol having at least one tertiary amine group, (B) a polyisocyanate of the diphenylmethane series having a functionality of from 2.5 to 4.0 and an OH-fun ...