Abstract: A method for repairing voids in a finished urethane foam product having a typical backing insert or retainer wall, the method including the steps of forming a hole through the retainer wall adjacent the void; inserting a small elastomeric sheath through the hole into the void; injecting a urethane or silicone elastomer into the sheath to fill same to conform to the void; and sealing off the hole with a suitable plug which may be sanded flush with the retainer wall outer surface.

Abstract: A delivery system for dispersing either hot air or water uniformly to the outer surface of a shell mold used for forming a thin molded shell, for the respective fusion and cooling phases thereof. The delivery system includes a plurality of distributors, each having a central water inlet surrounded by an axially adjustable outer shell, with the latter having a frusto-conically shaped upper end which cooperates with the upper edge of the central water inlet to selectively close off or vary the annular opening therebetween for controlling the flow of air at a predetermined temperature form the space intermediate the central water inlet and the surrounding outer shell.

Abstract: A method wherein an article is molded of liquid plastisol in a mold having mold heaters disposed adjacent the backside of a mold surface for controlling the temperature over respective first and second areas of the mold surface. First and second heating and cooling circuits are associated with each mold. To obtain liquid plastisol coating, the mold is filled by apparatus including a removable insert that reduces the quantity of plastisol that is used in the process to reduce the cycle time required for part molding. In one process, plastisol is pumped into and is removed from the mold with the mold insert in place. In another process the mold insert is removed from the mold and an intake tube remains in the mold to pump out excess material.

Abstract: A composite plastic product is formed by a process which includes formation of a preform of high strength plastic having openings formed therethrough which are covered by a film barrier that is formed during molding of the preform; and wherein the preform is configured to be placed as a unit in a foam station at which material is foamed onto the insert without escape to its backside.

Abstract: A composite plastic product is formed by a process which includes formation of a preform of high strength plastic having openings formed therethrough which are covered by a film barrier that is formed during molding of the preform; and wherein the preform is configured to be placed as a unit in a foam station at which material is foamed onto the insert without escape to its backside.

Abstract: A polyurethane RIM method has two mixheads. Reactants are brought to each mixhead and are supplied as separate streams to two spaced cavities in a mold having a pre-formed porous mat separating the two cavities. One stream contains an isocyanate, polyol, chain extender and crosslinker selected to have a very low viscosity and which reacts to produce a high modulus armature or load bearing member. The other stream contains a polyol and isocyanate with additives that have relatively high viscosity to produce a semi-rigid polyurethane foam. At each mixhead the proportions of ingredients are controlled to give a desired isocyanate index to control the flex modulus and other properties of the loading bearing member and foam molded components of the product. The low viscosity material penetrates the porous mat to reinforce it and the porosity of the mat prevents the high viscosity material from entering the armature cavity so as to reduce the load capacity of the finished product.

Abstract: Graft copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in the presence of an azo di-ester polyol. Presence of the azo group in the polyol reactant itself serves as a free radical initiator site for the graft copolymerization reaction. The copolymers formed are utilized in the formulation of polyurethane compositions.

Abstract: Graft copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in the presence of an azo di-ester polyol. Presence of the azo group in the polyol reactant itself serves as a free radical initiator site for the graft copolymerization reaction. The copolymers formed are utilized in the formulation of polyurethane compositions.

Abstract: Polyurethane foam formulations containing halogenated phosphate ester additives are inhibited against scorching through the use of an effective amount of 4,4'-bis(.alpha., .alpha.-dimethylbenyl)diphenylamine.

Abstract: Graft copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in the presence of a peroxy di-ester polyol. Presence of the peroxy group in the polyol reactant itself serves as a free radical initiator site for the graft copolymerization reaction. The copolymers formed are utilized in the formulation of polyurethane compositions.

Abstract: Graft copolymers of vinyl monomers and unsaturated polyols are described. These copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in a polyol comprising an alkenyl aryl polyol. The alkenyl aryl constituents render the polyols compatible for graft copolymerization with the vinyl monomers. The graft copolymers are shown in polyurethane formulations.

Abstract: Unsaturated polyol compounds containing alkenyl aryl constituents are described. These unsaturated polyols are prepared by reacting a polyol with an aromatic derivative including both an alkenyl constituent and a second functionality reactive with a polyol. The resulting unsaturated polyols feature an alkenyl aryl constituent which enhances polyol receptivity for graft copolymerization with vinyl monomers. The aryl constituent along with multiple hydroxyl groups of the polyol render these polyols particularly suitable for polyurethane end uses.

Abstract: Disclosed is a process for preparing polyurethane which comprises including an azo or peroxy di-ester polyol and an ethylenically unsaturated monomer in a polyurethane reaction formulation to effect simultaneous graft copolymerization and polyurethane polymerization. Novel polyurethane compositions are produced.

Abstract: Compounds containing peroxy linkages connecting similar polyol ester constituents are described. These peroxy di-ester polyols are prepared by the direct esterification of peroxy diacids with polyols, in the presence of a strong mineral acid catalyst. The peroxy di-ester polyol products function as free radical initiators and grafting bases in the graft copolymerization of unsaturated monomers with polyols. These graft copolymers are useful in the formulation of polyurethanes.

Abstract: Graft copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in the presence of a peroxy di-ester polyol. Presence of the peroxy group in the polyol reactant itself serves as a free radical initiator site for the graft copolymerization reaction. The copolymers formed are utilized in the formulation of polyurethane compositions.

Abstract: Graft copolymers of vinyl monomers and unsaturated polyols are described. These copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in a polyol comprising an alkenyl aryl polyol. The alkenyl aryl constituents render the polyols compatible for graft copolymerization with the vinyl monomers. The graft copolymers are useful in polyurethane formulations.

Abstract: Flexible polyurethane elastomers suitable for use as automotive exterior body parts are disclosed. The elastomers which are produced from select polymeric diols having a polyoxypropylene block capped with a random poly (oxyethylene-oxypropylene) structure, feature enhanced paint adhesion properties.

Abstract: Compounds containing an azo-linkage connecting two similar polyol esters constituents are described. These azo di-ester polyols are prepared by the direct esterification of azo diacids with polyols, in the presence of a strong mineral acid catalyst. The azo di-ester polyol products function as free radical initiators and grafting bases in the graft copolymerization of unsaturated monomers with polyols. These graft copolymers are useful in the formulation of polyurethanes.

Abstract: Selected Schiff bases of aromatic and alkylsubstituted aromatic ortho diamines are employed as cross-linking agents in the preparation of high resilience polyurethane foam.

Abstract: Polyether polyols and polyurethane foams are stabilized by the inclusion therein of a mixture of 2,6-di-tertiarybutyl-4-methyl phenol, a disubstituted diphenyl amine, and a select phenothiazine compound.