Basf Wyandotte Corporation

Herwart C Vogt

John T Patton, Jr

Manher Parekh

Moses Cenker

Pauls Davis

Charles F Deck

Bernardas Brizgys

Foamed polymers such as polyurethanes useful, for instance, as cushioning, insulation, and in reaction injection molding to produce thin section moldings can be produced without substantial reduction in physical properties by the incorporation therein of about 2 percent to about 75 percent by weight based upon the weight of said polymer of at least one non-reactive, liquid urethane modifier compound processing aid or flame-retardant additive. Said modifier has a low viscosity at ambient temperatures and is a low-molecular weight urethane adduct formed by the reaction of (1) at least one polyisocyanate and at least one monohydric alcohol or (2) at least one monofunctional isocyanate with at least one monohydric or polyhydric alcohol or (3) at least one isocyanate-terminated quasi-prepolymer with at least one monohydric alcohol. Said modifier can also consist of mixtures of (1), (2), and (3). Utilizing halogenated alcohols, flame-retardant polymer foams such as polyurethane foams can be prepared. Unexpectedly, microcellular, rigid, high-resilience, and flexible foamed polyurethanes can be prepared utilizing substantial proportions, such as flame-retardant amounts, of the modifier compound without substantial reduction in physical properties of the foam.

Foamed polymers containing low molecular weight urethane modifier

Rigid, solid, non-cellular, urethane polymer compositions can be prepared which are the reaction product of at least one polyhydric alcohol with at least one organic polyisocyanate in the presence of a low molecular weight urethane modifier adduct which is the reaction product prepared, for instance, by reacting (1) at least one polyisocyanate and at least one monohydric alcohol or (2) at least one monofunctional isocyanate with at least one monohydric or polyhydric alcohol. Said adduct can also consist of mixtures of (1) and (2). Such polymers when prepared in the presence of any catalyst for urethane formation which is a liquid or solid at ambient temperature, set quickly to solid, rigid polymers having a density of at least one gram per cubic centimeter. They can be demolded after combining the materials, without the addition of heat from an external source, within a period of less than one minute to about 15 minutes. By proper selection of the urethane modifier adduct, flame-retardant polymers can be prepared.

Rigid, non-cellular polyurethane modified with reaction product of an

By using a polyether polyol grafted with a suitable proportion of a suitable vinyl-type monomer with the use of a free-radical catalyst, it is possible to obtain filled or unfilled castings of thermosetting polyurethane which has excellent physical properties as well as good processing characteristics.

Preparation of polyurethane from a blend of polyether polyols and a

The addition of small amounts of organic titanium compounds to polyol compounds reduces the viscosity of said compounds.

Organic titanium compounds as viscosity improvers for polyol compounds

Compositions of vanadyl alcoholate, organic titanate and polyhydric alcohol compounds are effective esterification and transesterification catalysts.

Vanadyl alcoholate, organic titanate, polyhydric alcohol compositions as

Complexes of stannous carboxylate and tetraalkyl titanate are effective esterification and transesterification catalysts.

Tin titanium complexes as esterification/transesterification catalysts

Polyester polyols are prepared by the reaction of a polycarboxylic acid or anhydride with a polyhydric alcohol employing in an initial step a stoichiometric excess of polycarboxylic acid or anhydride, thereafter removing between 90 to 95% of the water of esterification, adjusting the stoichiometry of the reaction by addition of polyhydric alcohol, and continuing the esterification reaction until a polyester polyol having an acid number of less than two is obtained. The process allows for an increase in reactor capacity without equipment modification at the same cycle times and a decrease in side product formation.

Process for the preparation of polyester polyols

Complexes of quadrivalent organotin and quadrivalent organotitanium compounds are effective esterification and transesterification catalysts.

Tin-titanium complexes as esterification/transesterification catalysts

Hydrocarbon polymers which have been chloronitrosylated and chlorosulfonated to introduce nitrogen and sulfur containing polar groups into the polymer or composites of chlorosulfonated and chloronitrosylated hydrocarbon polymers may readily be crosslinked with heat forming products having improved physical properties.

Chloronitrosylated, chlorosulfonated hydrocarbon polymers and a process

Organic polymers are crosslinked with polyfunctional chloronitroso containing compounds.

Crosslinking polymers with chloronitroso compounds

The process for curing polymers with chloronitroso compounds can be accelerated by incorporating metallic compounds as accelerators.

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Grosse Ile, MI, United States of America

Herwart C Vogt