Abstract: The present invention is directed to the use of a mixture of specific chlorofluorocarbons and an alkyl alkanoate in the production of rigid, closed cell foams.

Abstract: The present invention relates to a novel chain extender for use in making moldings. The chain extender broadly comprises the reaction product of an aromatic diamine and a cyclic carboxylic acid anhydride.

Abstract: The present invention is related to a structural member comprising a laminate and an adhesive where said adhesive is the reaction product of (a) 100 parts by weight of at least one hydroxy functional material having a molecular weight of at least 300 and a hydroxy functionality of at least 2 which material is preferably selected from the group consisting of polyether polyols, polyester polyols, polyester amide polyols, and polycarbonate polyols, (b) 0.2 to 20 parts by weight of an aliphatic, aromatic and/or a cycloaliphatic diamine or triamine, and (c) an organic isocyanate in an amount sufficient to render the isocyanate index between about 70 and about 150, wherein said component (c) is not prereacted with any of the components (a) and (b). In a preferred embodiment, there is included up to 50 parts by weight of component (d) which is an aliphatic polyol having a functionality of at least 2 and a molecular weight of below 300.

Abstract: The present invention is directed to a process for the production of optionally cellular, polyurea elastomer moldings by reacting a reaction mixture containing(I) a polyisocyanate,(II) a polyether having at least two isocyanate-reactive groups and a molecular weight of 1800 to 12,000 in which at least 50% of the isocyanate-reactive groups are primary and/or secondary amino groups,(III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a sterically hindered aromatic diamine and(IV) about 1 to 20% by weight, based on the weight of components (II) and (III) of an active hydrogen-containing fatty acid ester having a molecular weight of about 500 to 5000 and prepared by reacting an alcohol with an aliphatic, saturated or unsaturated fatty acid, said ester being characterized in that at least one aliphatic acid which contains more than eight carbon atoms is built into the molelcule, said ester further characterized as having an acid number of 0 to 100 and a hydroxyl numb

Abstract: The rod-support chair of the present invention comprises a plastic channel made of a thermoplastic resin preferably selected from the group consisting of polycarbonate, aromatic polyester carbonate and aromatic polyesters. The channel is further characterized in that its physical dimensions and material properties permit its elastic and bending across its long dimension around at least part of the circumferential cross-section of a reinforcing rod and provide support for the rod for a period which is necessary for the concrete to set. The channel in its "in use" configuration is left in the cured, or set concrete and does not interfere with the setting process nor does it contribute to rust formation.

Abstract: The present invention is directed to a process for desulfurizing a compound selected from isothioureas and isothioamides comprising heating the compound to be desulfurized in the presence of a mercaptanol to produce the corresponding desulfurized keto compound.

Abstract: The present invention is related to a stain resistant polycarbonate panel which preferably comprises co-extruded polycarbonate sheet and an adherent layer based on linear polycarbonate resin which contains an additive conforming to ##STR1## wherein R.sup.1 and R.sup.2 independent of each other are a hydrogen or a halogen atom, a C.sub.1 -C.sub.12 alkoxy, C.sub.7 -C.sub.18 arylalkoxy or a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical and R.sup.3 and R.sup.4 independent of each other are a hydrogen atom, a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical, n is an integer of 0-4 and m is an integer of 1 to 3, --Bridge-- is either ##STR2## where p is 0-3, q is 1-10, Y denotes any of ##STR3## and R.sup.3 and R.sup.4 independently denote a hydrogen atom a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical characterized in that said adherent layer is about 5 to 100 microns in thickness and in that only one of its surfaces is bonded.

Abstract: TCH is produced by a process which does not require expensive measures to remove hydrazine. In this process, hydrazinium dithiocarbazinate is reacted with an amine other than hydrazine or a strong base, optionally in the presence of water. It is preferred that a sulfur suppressing compound also be included in the reaction mixture. The precipitated TCH is removed from the reaction mixture to leave a mother liquor. Hydrazinium-dithiocarbazinate may then be added to the mother liquor. TCH precipitates and may be readily recovered.

Abstract: The present invention is directed to an apparatus for the distribution of a foamble reaction mixture upon a moving base. The present invention is directed to the discovery that by injecting small amounts of air into both ends of a conventional pipe-type dispenser, the operation time without any plugging can be substantially increased. The air flow prevents build-up of reaction mixture around the dispensing holes.

Abstract: Horses can be immunized by the intranasal administration of antigenic material which provokes the proliferation of antibodies which reduce or neutralize the virulence of invasive microorganisms. These antigenic materials may be inactivated whole organisms, extracts from such organisms, or recombinant DNA or synthetic peptide antigens. This antigenic material can be combined with adjuvants and transdermal carriers or it can just be carried in sterile water. The intranasal vaccination may be part of a total regimen that includes other routes of administration such as intramuscular injection.

Abstract: Thiocarbohydrazide (TCH) is made by reacting carbon disulfide and hydrazine in the presence of a mercaptan at an elevated temperature. The TCH is removed from the reaction mixture, the mother liquor is further treated to form HDTC which is further reacted to form TCH and the mother liquor is recycled. A major advantage of this process is the recyclability of the mother liquor without reduction in TCH yield.

Abstract: TCH is produced in two stages. In the first stage, carbon disulfide and excess hydrazine are reacted in the presence of a mercaptan and optionally a strong base or an amine other than hydrazine. Carbon disulfide and a strong base (if none was present during the first stage) are then added to the reaction mixture which is further reacted to complete the formation of TCH.

Abstract: The present invention is directed to a continuous process for the production of powdered polyisocyanate addition products in finely divided form which by simultaneously (a) mixing a polyisocyanate component, an isocyanate-reactive component and an inert organic medium containing a surfactant, wherein at least one of the components is insoluble in the inert organic medium, in a low shear stator-rotor dynamic mixer operating at speeds of about 300 to 8000 rpm, utilizing a mixing wattage of about 0.05 to 10.0 watts per cubic centimeter and having a mixing volume of at least about 0.

Abstract: A foam laminate comprising a polyurethane foam core sandwiched between two facing material, wherein said foam core has: a flamespread as determined by ASTM E-84 of 25 or less, a smoke density as determined by ASTM E-84 of less than 450, a dimensional stability measured as a % volume change as determined by ASTM D-2126, after 28 days (1) at -30.degree. C. of no more than 1, (2) at 100.degree. C. of no more than 8, and (3) at 70.degree. C. and 100% relative humidity of no more than 12, and a firmness of no more than 0.6 centimeters after 5 minutes. The foam core is produced by reacting: a polymethylene poly(phenyl isocyanate) based isocyanate, one or more aromatic polyester polyols having hydroxyl functionalities of 2.4 or more and hydroxyl numbers of 350 or more, one or more polyether polyols having hydroxyl functionalities of 4 or more and hydroxyl numbers of 340 or more, one or more flame retardants, and, one or more blowing agents, one or more catalysts, and one or more surfactants.

Abstract: The present invention relates to a novel chain extender for use in making moldings. The chain extender broadly comprises the reaction product of an aromatic diamine and a cyclic carboxylic acid anhydride.

Abstract: The present invention is directed to a process for the production of polyurethane moldings by reacting a reaction mixture comprising(a) a polyisocyanate,(b) an isocyanate-reactive material having a molecular weight of from about 840 to about 5,000, and(c) a chain extender, said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of from about 70 to about 130,the improvement wherein component (b) comprises a polyester polyol having the structure: ##STR1## wherein R represents the residue of a polyepoxide after ring opening with a carboxylic acid group,R' represents the residue of a cyclic anhydride,X represents the organic residue of a polyol,m represents the number of epoxy groups of the polyepoxide ring opened with carboxylic acid groups, andn is an integer of from one to seven.

Abstract: A selectively herbicidal composition of matter comprising a herbicidally effective amount of(A) 4-amino-6-tert.-butyl-3-methylthio-1,2,4-triazin-5(4H)-one, and(B) 4-amino-6-tert.-butyl-3-ethylthio-1,2,4-triazin-5-(4H)-one.The composition is especially suited for selectively killing monocotyledon and dicotyledon weeds in the cultivation of cereals and leguminous plants.

Abstract: The present invention is directed to an aqueously dispersed, heat-curable coating composition comprising(a) a water dispersible, blocked polyisocyanate containing chemically incorporated anionic hydrophilic groups, at least a portion of which are neutralized with volatile organic compounds,(b) a water dispersible, hydroxyl-terminated polyurethane prepolymer containing chemically incorporated anionic hydrophilic groups, at least a portion of which are neutralized with volatile organic compounds and(c) an epoxy resin which remains stably dispersed in said coating composition.The present invention is also directed to coatings prepared from the above coating composition.

Abstract: In accordance with the present invention there is provided a vulcanizable halogenated butyl rubber compound having an improved degree of scorch resistance without causing unreasonably long cure time. The compound is characterized in that it comprises a retarder conforming structurally to ##STR1## wherein X is a C.sub.1 -C.sub.6 alkyl andn is an integer from 0 to 4.The physical properties of the compound are substantially unchanged by the incorporation of the retarder.

Abstract: The mold broadly consists of an upper and lower mold part. The parts define a mold cavity when the mold is in the closed position. A channel is provided in one of the parts, with the channel completely surrounding the cavity. One upper edge of the channel forms at least a portion of the outer edge of the mold cavity. The channel is at least partially filled with an elastomeric material. A shear plate is attached to the other part in a location opposite the channel. When the mold is in the closed position, the shear plate enters the channel, presses against the elastomeric material and presses against the outer edge of the mold cavity. The shear plate is also provided with one or more tapered slots which allow gases to escape from the mold cavity when the mold is in the closed position.