Abstract: A process for preparing a slow-burning, low-smoking, high heat-distortion-temperature polyisocyanurate polymer and the polymer produced thereby, which process comprises reacting an MDI prepolymer with a caprolactone polyol in the presence of a trimerization catalyst, wherein the MDI prepolymer is prepared from an MDI having a functionality of about 2.4 or less, and particularly a 2.4 isomer, and with an ethylene-oxide-capped polypropylene oxide polyol, the process providing for the formation of a rigid, high heat-distortion RIM or an open-spray molded part.

Abstract: A light stable, fast reacting, aliphatic polyurethane sprayable coating composition and injectable open molding material is prepared by reacting an A side composition comprising a trimerized or biuret polymethylene polyisocyanate prepolymer with a B side composition comprising an admixture of an alkoxy polyalkylene glycol, such as methoxypolyethylene glycol and an aromatic polyamine such as a diethyl toluene diamine to provide a polyurethane reaction product which rapidly gels, may be quickly removed from the mold, has good green strength and high temperature resistance and is characterized by good ultraviolet or light stability properties. Optionally, the B side composition may contain a catalytic amount of a metal carboxylate like lead napthenate. The A and B side compositions may be sprayed onto a mat in an open mold and also may be sprayed in conjunction with chopped glass fibers, to form a glass-fiber spray coating.

Abstract: A process of preparing a fast reacting, light stable, sprayable or injectable polyester-modified polyurethane polymer reaction product to prepare coatings or molded products, which process comprises admixing and reacting together: a trimerized or biuret aliphatic polyisocyanate, such as a trimerized or biuret hexamethylene diisocyanate prepolymer; a polyamine to react as a chain extender for the prepolymer, such as for example, a diethyltoluene diamine, in an amount sufficient to react substantially with the free NCO groups of the trimerized or biuret prepolymer; an unsaturated polyester subject to cross linking by the use of a metal salt promotor, such as a cobalt salt promotor, and a peroxide initiator; the cobalt salt and the peroxide initiator present in an amount to provide for the curing of the unsaturated polyester.

Abstract: Sprayable urethane resin compositions and a process for preparing the sprayable resin compositions particularly with reinforcing materials such as chopped fiberglass, which process comprises reacting generally equal volumes of A and B side mixtures in a sprayable reaction to form a fast reacting, fast curing urethane resin, the A side mixture comprising an MDI or an MDI prepolymer prepared by reacting an MDI with a triol and a B side mixture comprising an auto catalytic, aromatic amine polyol having a hydroxyl number ranging from about 300 to 600, a viscosity reducing amount of a tetraethylene glycol and a catalyst to affect the rapid reaction and cure of the A and B side mixtures on spraying, the process may optionally include the incorporation of reinforcing materials, such as glass fibers and optionally may include the use of blowing agents to provide a lower density reinforced cured product.

Abstract: A flexible polyurethane foam composition characterized by high tensile or tear strength is prepared by reacting an MDI prepolymer, prepared by reacting a MDI having a low functionality with an ethylene oxide-capped polypropylene glycol polyol, with a small amount of a tetraethylene glycol as a cross-linking agent and an ethylene oxide-capped polypropylene glycol polyol, the reaction carried out in the presence of a blowing amount of a blowing agent, such as water or a halocarbon, and a catalytic amount of a polyurethane catalyst, such as a combination of an amine and tetravalent tin catalyst. The addition of a small amount of a chlorinated phosphate flame-retardant agent mixed with the reaction provides for a polyurethane foam composition of good fire retardancy and which when exposed to open flame does not melt, but chars. Further, the addition of a trimerization catalyst provides a foam composition with reduced shrinkage.

Abstract: A high-modulus, solid urethane spray coating is prepared by spraying onto a substrate equal volumes of an A-side and a B-side mixture together, the A side comprising 100 parts of a prepolymer prepared by reacting a polyether triol with a low-functionality MDI, and the B side comprising from about 5 to 40 parts of a butane diol and 60 to 95 parts of a polyether triol, and a catalyst system which comprises a tetravalent tin catalyst in combination with an acid-blocked amine catalyst.

Abstract: A sprayable, modified polyisocyanurate solid or foam composition, with fast reaction times and excellent fire properties and capable of being sprayed in a one-to-one, fixed-volume spray system, is prepared by the reaction of a low-functionality MDI, with a polyol composition comprising a methoxy polyethylene glycol and a methyl glucoside polyol, the reaction carried out in the presence of a trimerization catalyst, to provide a sprayable polyisocyanurate composition particularly useful for spraying upright and overhead surfaces, due to the fast reaction time and rapid cure.

Abstract: A polyisocyanurate coating composition, which composition comprises and is prepared by reaching 100 parts of a methylene diisocyanate, having an average functionality of less than about 2.4, with a mixture of a di or triethylene glycol and a methoxy polyethylene glycol, the reaction carried out in the presence of a trimerization catalyst, and to a polyisocyanurate-coated, rigid-foam insulation board coated with such composition.

Abstract: A sprayable polyisocyanurate composition, which composition is prepared by reacting equal parts of an A side mixture, containing a low-functionality methylene diisocyanate, with a B side mixture which comprises diethylene glycol, a low-hydroxyl polyether triol, a trimerization catalyst and a heat-activated catalyst, to provide a cure time of less than about 30 seconds.

Abstract: An improved, modified polyisocyanurate foam composition having improved compressive strength and good flame and smoke properties is prepared by the reaction of a methylene diisocyanate with a modifying amount of a hydroxyl compound, such as a hydroxyl-containing polyether or a saturated polyester, and with an alicyclic glycol, such as cyclohexane dimethanol, in the presence of a trimerization catalyst, a blowing amount of a blowing agent and a surfactant.

Abstract: A foam composition obtained by first forming a pre-blend reaction product by reacting about 200 to about 250 parts by weight melamine with about 20 to about 100 parts by weight phenolic resin having benzylic ether linkages in the presence of a catalyst and further reacting said pre-blend reaction product with about 20 to about 100 parts by weight isocyanate and about 20 parts by weight polyethylene glycol. Such foams are essentially non-burning under fire conditions and exhibit excellent compression strength characteristics while being virtually non-firable.

Abstract: An isocyanurate thermosetting foam composition having improved flame, smoke and nonburning properties with high char resistance, which foam composition is prepared by the reaction of from about 5 to 40 parts of a methoxy polyethylene glycol and optionally with melamine, with 100 parts of a methylene diisocyanate having an average functionality of about 2.4 or less in the presence of a blowing agent, a surfactant and a single trimerization catalyst, to provide a closed-cell, thermosetting, modified polyisocyanurate foam having a flame-spread value of about 15 or less.

Abstract: A polyester-melamine-isocyanurate thermosetting foam composition having improved flame, smoke and nonburning properties with good compressive strength, which foam composition is prepared by the admixture of a saturated polyester resin, a flame-retardant amount of melamine, a methylene diisocyanate, in the presence of a silicone-glycol surfactant, a fluorocarbon blowing agent and a trimerization catalyst to provide a closed-cell thermosetting foam.

Abstract: A flame-retardant, rigid, thermosetting foam product is prepared by reacting, in the presence of a blowing agent and a catalyst, particularly an organic metal catalyst, a furfural alcohol polymer, a phenol-formaldehyde resin, a melamine and methylene diphenyl isocyanate, which reaction provides for a rigid foam characterized by low friability and good heat- and flame-resistant properties.

Abstract: A method of preparing a flame-retardant benzylic-ether phenolic modified foam product and the resulting foam product produced thereby, which method comprises reacting and mixing benzylic-ether phenol-formaldehyde resin, having a hydroxyl number of from about 400 to 600, with from about 50 to 150 parts by weight of a boric-acid catalyst to each 100 parts of the resin, optionally in the presence of melamine, to form a resin prepolymer, and, thereafter, reacting the prepolymer so formed, in the presence of a blowing agent and an organometal catalyst, with a methylene diisocyanate in an exothermic reaction, to provide a nonfriable, substantially closed-cell, flame-retardant benzylic-ether phenolic modified foam product characterized by substantially acid methylene linkages in the resulting thermosetting foam product.