Abstract: This disclosure describes a method of making a polyurethane foam and a method of reducing NVH expected to be experienced by a substrate using the foam. When the foam is subjected to 95% relative humidity for a period of 7 days at a temperature of about 50° C., the foam absorbs an amount of water that is less than about 30% of the weight of the foam.

Abstract: This disclosure describes a method of making a polyurethane foam and a method of reducing NVH expected to be experienced by a substrate using the foam. When the foam is subjected to 95% relative humidity for a period of 7 days at a temperature of about 50° C., the foam absorbs an amount of water that is less than about 30% of the weight of the foam.

Abstract: A polyurethane foam is disclosed and described. The polyurethane foam is formed by combining a first component comprising at least one polyol with a second component comprising at least one polyisocyanate. The ratio of the number of isocyanate equivalents in the second component to the number of hydroxyl equivalents in the second component is less than 1.0. The foam exhibits low levels of free diisocyanate monomer, thereby reducing the amount of hazardous, volatile organic compounds. As a result, the foam can be prepared and installed without the need for ventilation equipment, external sources of fresh air, and the like.

Abstract: A polyurethane foam is disclosed and described. The polyurethane foam is formed by combining a first component comprising at least one polyol with a second component comprising at least one polyisocyanate. The ratio of the number of isocyanate equivalents in the second component to the number of hydroxyl equivalents in the second component is less than 1.0. The foam exhibits low levels of free diisocyanate monomer, thereby reducing the amount of hazardous, volatile organic compounds. As a result, the foam can be prepared and installed without the need for ventilation equipment, external sources of fresh air, and the like.

Abstract: The disclosed invention relates to a method of making polyurethane prepolymers which have improved moisture resistance. The disclosed invention also relates to methods of manufacture of rebonded foam wherein the improved moisture resistant polyurethane prepolymers are used to bond polyurethane foam crumb.

Abstract: Foamed molded articles produced by reaction injection molding (RIM) are provided. The molded articles are formed by reaction of a polyisocyanate component with an isocyanate reactive component in a mold using a blowing agent. The molded articles are preferably composites formed in the presence of a fibrous reinforcing material. The foamed articles are characterized by relatively short minimum mold residence times, and can thereby be produced more economically than prior art composites. The foamed articles are further characterized by a reduction in physical defects, such as splits and voids.

Abstract: A reaction system used to produce an unreinforced structural foam molding includes a polyisocyanate component, an organic isocyanate-reactive component, an isocyanate foaming agent and optionally an additive. The reaction system can be used in a reaction injection molding process where the reaction system is first blended to form a liquid reacting mixture that is injected into a mold. After the liquid reacting mixture foams and cures within the mold, the mold is opened and the unreinforced structural foam molding is removed.

Abstract: Internal mold release systems that include an internal mold release agent that includes any one of fatty acids, fatty acid esters and metal carboxylates, and employ a poly(dimethylsiloxane) surfactant with the following formula:

Abstract: The disclosed invention relates to a method of making polyurethane prepolymers which have improved moisture resistance. The disclosed invention also relates to methods of manufacture of rebonded foam wherein the improved moisture resistant polyurethane prepolymers are used to bond polyurethane foam crumb.

Abstract: Foamed molded articles produced by reaction injection molding (RIM) are provided. The molded articles are formed by reaction of a polyisocyanate component with an isocyanate reactive component in a mold using a blowing agent. The molded articles are preferably composites formed in the presence of a fibrous reinforcing material. The foamed articles are characterized by relatively short minimum mold residence times, and can thereby be produced more economically than prior art composites. The foamed articles are further characterized by a reduction in physical defects, such as splits and voids.

Abstract: Internal mold release systems which include an internal mold release agent that includes any one of fatty acids, fatty acid esters and metal carboxylates, and employ a poly(dimethylsiloxane) surfactant of Formula I: 1

Abstract: A method and apparatus for liquid thermoset resin or polymer molding using electromagnetic waves (particularly radiofrequency waves or microwaves), is described. The method and apparatus uses a metal mold (10, 212) with a cavity (401) for the molding as well as for confinement of the electromagnetic waves. Multiple low loss ports (A, B, C, D, E, p1, p2, p3) are provided for introducing the microwaves into the cavity.

Abstract: A method and apparatus for liquid thermoset resin or polymer molding using electromagnetic waves (particularly radiofrequency waves or microwaves), is described. The method and apparatus uses a metal mold (10, 212) with a cavity (401) for the molding as well as for confinement of the electromagnetic waves. Multiple low loss ports (A, B, C, D, E, p1, p2, p3) are provided for introducing the microwaves into the cavity.