Abstract:
Polyurethane/polyurea polymers can be electrostatically painted without first being coated with a conductive primer. Disclosed is an improvement in a process for electrostatically painting polyurethane/polyurea polymers, the improvement being to prepare the polymer from a formulation including a non-volatile metal salt conductivity inducing material. The polymers painted by the process of the present invention can have physical properties and aesthetic properties substantially similar to those of otherwise identical polymers prepared without the non-volatile metal salt conductivity inducing materials of the present invention. The increased conductivity of the polymers can allow them to be charged with sufficient charge density to permit efficient paint transfer to the polymer surface. Also disclosed is a composition of at least two layers, one layer being an outer layer of electrostatically applied paint, and the other an inner layer of polyurethane/polyurea polymer.
Abstract:
A blended composition containing polycarbonate, polyester, an olefinic epoxide-containing copolymer and a polyamine compound, which composition possesses a desirable balance of impact resistance, solvent resistance, and resistance to thermal deformation.
Abstract:
In one aspect the invention is a flexible polyurethane foam composition prepared from a formulation comprising (1) an organic polyisocyanate, (2) an isocyanate-reactive component, (3) a catalyst, and (4) a foam stabilizing agent. Foam stabilizing agents can be, (a) alkali metal dihydrogen phosphates and polyphosphates; (b) alkali metal sulfates; (c) aluminum sulfates, phosphates, polyphosphates, borates and alkanoates; (d) ammonium sulfates, phosphates, polyphosphates, borates and alkanoates; (e) acid chlorides; or (f) mixtures thereof. Preferably the isocyanate-reactive component has an average nominal functionality greater than or equal to 3 and the formulation is processed at an isocyanate index of from 80 to 130, preferably 85 to 100. In another aspect the invention is a foam prepared from a similar formulation, using the same relatively high functionality isocyanate-reactive component and reduced index, but without the foam stabilizing agent. Advantages are improved processability and physical properties, including tensile strength, tear resistance and resiliency, even when the formulations use water as a sole blowing agent.
Abstract:
Flexible polyurethane foams are prepared by reacting a polyisocyanate with certain amine-terminated compounds. The amine-terminated compounds are characterized in having at least 30 percent of their active hydrogen-containing groups in the form of primary aromatic, Lewis acid-blocked primary aliphatic and/or secondary aromatic or aliphatic amine groups. The resulting foams exhibit excellent physical properties, even in the absence of a cross-linker compound.
Abstract:
Polyurethane/polyurea polymers can be electrostatically painted without first being coated with a conductive primer. Disclosed is an improvement in a process for electrostatically painting polyurethane/polyurea polymers, the improvement being to prepare the polymer from a formulation including a non-volatile metal salt conductivity inducing material. The polymers painted by the process of the present invention can have physical properties and aesthetic properties substantially similar to those of otherwise identical polymers prepared without the non-volatile metal salt conductivity inducing materials of the present invention. The increased conductivity of the polymers can allow them to be charged with sufficient charge density to permit efficient paint transfer to the polymer surface. Also disclosed is a composition of at least two layers, one layer being an outer layer of electrostatically applied paint, and the other an inner layer of polyurethane/polyurea polymer.
Abstract:
Selon un aspect de l'invention, on décrit une composition d'une mousse de polyuréthanne souple préparée à partir d'une formulation comprenant (1) un polyisocyanate organique, (2) un constituant réagissant à l'isocyanate, (3) un catalyseur, et (4) un agent de stabilisation de mousse. Les agents de stabilisation de mousse peuvent comprendre a) des polyphosphates et phosphates de dihydrogène de métal alcalin; b) des sulfates de métal alcalin; c) des sulfates, phosphates, polyphosphates, borates et alcanoates d'aluminium; d) des sulfates, phosphates, polyphosphates, borates et alcanoates d'ammonium; e) des chlorures d'acide; ou f) des mélanges de ces éléments. Le constituant réagissant à l'isocyanate présente de préférence une fonctionnalité nominale moyenne supérieure ou égale à 3, et la formulation est développée alors qu'elle présente un indice d'isocyanate compris entre 80 et 130, de préférence 85 et 100. Selon un autre aspect, l'invention se rapporte à une mousse préparée à partir d'une formulation analogue, où l'on utilise le même constituant réagissant à l'isocyanate et à fonctionnalité relativement élevée, ainsi que l'indice réduit, mais sans l'agent de stabilisation de mousse. Les avantages que présente cette mousse résident dans une facilité de traitement ainsi que des caractéristiques physiques améliorées, y compris en ce qui concerne la résistance à la traction et l'élasticité et la résistance à la déchirure, même lorsque les formulations utilisent l'eau comme agent gonflant unique.
Abstract:
The present invention provides a unitary run flat tire (RFT) reinforcement (16) using filament material that is formed into a relatively rigid shape. The reinforcement is insertable into a mold for an RFT support and can maintain the needed structural rigidity for such insertion. Further, the invention provides an RFT support that is molded and includes the RFT reinforcement. The invention also provides a wheel assembly including a tire, a rim, and an RFT support between the rim and the tire, where the support includes the RFT reinforcement. The RFT support can have a colored indicator formed or subsequently applied thereto to indicate one or more attributes of the support.
Abstract:
A polyurethane-polymer composition suitable for preparing a lightweight tire support includes at least one isocyanate, at least one polyol, and at least one chain extender. A polyurethane-polymer composition can also include an additive such as a catalyst, a filler, a surfactant, a colorant, and a mold-release agent. A lightweight tire support can be prepared from a polyurethane-polymer composition by, for example, reaction injection molding. Such a tire support desirably has temperature stability and load-bearing capability.