Abstract:
The present invention provides methods of producing polyurethane and polyisocyanurate foams comprising reacting and foaming a mixture of ingredients that react to form a polyurethane or polyisocyanurate foam in the presence of a catalyst solution comprising a catalyst solvent and about 60 wt % or less, based on the total weight of the catalyst solution, of alkali metal salt. Also provided are foams produced via the methods of the present invention.
Abstract:
Black polyurethane foams that exhibit higher strength black colorations without the need for concomitant increases in black colorants therein are provided. Such a resultant jetter black foam article is possible through the unexpectedly effective introduction of small amounts of certain toner compounds or combinations that exhibit specific measurable appearance characteristics. Such toners exhibit at least one absorption peak within a specific range of wavelengths (e.g., from about 560 to 610 nm) and specific ranges of half-height bandwidths (from 40 to 130 nm). Furthermore, such a compound or combination of compounds, is preferably liquid in nature (at room temperature) or in dispersion form and may thus be easily incorporated within target polyurethane precursor compositions for admixture with either black pigments (or dispersions thereof), black polymeric (liquid) colorants, or both. Methods of high strength black polyurethane foam production as well as separate pigmented and liquid polymeric colored foams of such type including the necessary toner compounds and/or combinations, as noted above, are also encompassed within this invention.
Abstract:
A moisture curable hot melt sealant composition that includes polyurethane prepolymer having at least one of isocyanate functional groups and silane functional groups, reactive plasticizer capable of reacting with at least one of the polyurethane prepolymer and itself, and thermoplastic polymer.
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: (CH3)3SinullOnullnull(CH3)2SinullOnullnullnnullnullCH3nullSi(R)nullOnullnullmnullSi(CH3)3 wherein, Rnullnull(CH2)3nullOnullnullEOnullxnullRnull; Rnull is H; C1 to C20 alkyl; or C6 to C25 aryl; x is a number from greater than 1 up to about 24; m is a number from 1 to about 25; and n is a number from 0 to about 100. Isocyanate compositions, isocyanate reactive compositions and polyurethane reaction systems that employ the surfactant also are disclosed.
Abstract:
A thermally curable hot-melt adhesive composition, comprising a polyurethane prepolymer having isocyanate groups, wherein at least 50% of the reactive isocyanate groups of the prepolymer are blocked, said prepolymer being the reaction product of (1) 20 to 40 wt % of at least one straight-chain amorphous polyester having a number average molecular mass Mn of 3000 to 6000 with (2) 40 to 60 wt % of at least one polyurethane elastomer, (3) 10 to 20 wt % of at least one polyester elastomer, (4) at least one diisocyanate, (5) at least one polyol as a chain extender, and (6) at least one blocking agent; and at least one isocyanate reactive component selected from the group consisting of polyalcohols, polyamines and hydroxy-functionalized epoxide resins; wherein the percentages are based on the total weight of polyester, polyurethane elastomer and polyester elastomer.
Abstract:
Golf balls incorporate thermoplastic compositions including urethane that is a reaction product of a diol or polyol with an isocyanate, and a peroxide to induce crosslinking. The polyol is selected from a polyester polyol, a polycarbonate polyol, a polyether polyol, a polybutadiene polyol or mixtures of these. Preferred chain extenders include polyols, diisocyanates, diamines or mixtures of these. The peroxide is selected from aliphatic peroxides, aromatic peroxides, cyclic peroxides, or mixtures of these. Upon sufficient heating of a composition of the thermoplastic urethane and peroxide, crosslinking is induced in the thermoplastic urethane to form a thermoset polyurethane. The invention allows for the processing advantages of a thermoplastic urethane with the superior performance characteristics of a thermoset polyurethane.
Abstract:
A polyurethane composition comprising: A) from 3 to 35% by weight of a polymeric composition comprising 1) at least one polymer and 2) at least one thermoset in amounts of from 0.5 to 50% by weight, based on the sum of A1) and A2), prepared by reaction in the polymer matrix A1) of a) at least one starting component containing NH2 groups and b) at least one starting component containing NCO groups, a) and b) having simultaneously or independently a functionality of null2 and at least one starting component having a functionality of >2 being present in amounts of from 0.5 to 100% by weight, based on the weight of A2); B) from 15 to 45% by weight in the polymeric composition A), based thereon, of at least one amorphous and/or crystalline polyester having an OH number of from 10 to 250 mg KOH/g; C) from 7 to 25% by weight in the polymeric composition A), based thereon, of at least one curing agent based on blocked polyisocyanates, isocyanurates and/or uretdiones having a functionality of at least 1.7; D) from 1 to 50% by weight in the polymeric composition A), based thereon, of auxiliaries and additives; there being from 0.6 to 1.2 NCO groups per OH group of A) and B).
Abstract:
An aqueous coating composition comprising a crosslinkable water-dispersible oligomer(s), a dispersed polymer(s) and optionally a non-crosslinkable water-dispersible oligomer wherein the crosslinkable oligomer(s) and non-crosslinkable oligomer(s) comply with Equation 1 as follows: 1 - 15 null 10 4
Abstract:
The present invention provides a fully vulcanized thermoplastic elastomer comprising a rubber phase with a controllable particle size and a spheroidic shape, the preparation and use thereof. Fully vulcanized powdery rubber is blended with plastic by conventional method for blending rubbers, and thus obtaining a fully vulcanized thermoplastic elastomer, which comprises a rubber phase with a controllable particle size and a spheroidic shape, and which shows high tensile strength and high elongation at break, good appearance and good processibility.
Abstract:
An aqueous resin composition satisfying the following criteria (I)-(III). (I) The aqueous resin composition contains (a) an aqueous dispersion of a polyurethane resin obtained from a macromolecular polyol, organic polyisocyanate, chain extending agent and 2,2-dimethylolbutanoic acid, and, if required, (b) an aqueous dispersion of an acrylic resin. (II) When the resin comprising this aqueous resin composition contains mainly a polyurethane resin, the inherent viscosity (nullinh) of the polyurethane resin measured at a concentration of 0.5 g/dL in dimethylformamide solution is in the range of 0.2-0.7 dL/g. After this aqueous resin composition is dried, the elastic modulus at 25null C. of the film obtained by heat treatment at 80null C. for 8 hours is in the range of 8.0null106null5.0null108 Pa, and the elastic modulus at 80null C. 8.0null107 Pa or less. When this aqueous resin composition is used to treat fibrous sheets, it gives fibrous products having excellent performance and durability without any problem regarding safety, hygiene or pollution, and, when it is used as a back coating resin for a separable fastener, a separable fastener is obtained having excellent resistance to fiber dropout in washing and resistance to chlorine bleaching agents, together with good durability over very long periods of use.