Abstract: Disclosed herein is a composite, self-supporting, polyurethane foam sheet prepared by forming an aqueous dispersion of hydrophilic polyurethane foam particles with fibers to serve as a binder therefor, wet-layering the dispersion onto a supporting screen to form a sheet, and removing water from the sheet. If desired, a porous web, woven or non-woven, e.g. paper, cloth, etc., can be positioned on the screen with the dispersion being layered out onto the web to form a laminar composite structure. Whether in sheet form or as a laminar structure the product of the invention is formed rapidly and possesses a desirable soft or cushioning feel.

Abstract: Curable composition containing (1) at least 20% by weight monoalkenyl aromatic-diene copolymer resin; (2) at least 2% by resin weight of at least one monomer substantially compatible with said resin and having at least one cross-linkable C--C-double bond; (3) 0.1 to 35% by resin weight of polythiol containing at least two-SH groups per molecule; and, (4) a curing agent. The disclosure is directed primarily at printing plate production and the composition contains 0.01 to 10% by resin weight of photoinitiator and the monomer is an addition photopolymerizable polyethylenically unsaturated acrylic or methacrylic acid ester containing two or more acrylate or methacrylate groups per molecule or mixtures thereof. In an alternate form low molecular weight liquid rubber polymer may be included in the compositon. Other materials such as stabilizers may also be present.

Abstract: Low density cementitious compositions are disclosed which are essentially the hydrated products from mixtures of inorganic hydratable binders such as gypsum and Portland cement with a novel lightweight aggregate material comprised of partially combusted bark particles obtained from bark-burning boiler furnaces of pulp processing concerns. Preferred compositions additionally incorporate conventional additives such as surfactants, fibrous materials, foam stabilizers and conventional lightweight aggregate such as expanded vermiculite to give products useful as lightweight thermal insulation concretes and fireproofings.

Abstract: Water based polymeric dispersions, such as closure sealing compounds, which comprise a polymer latex, a resin component and a particulate nonplastic component such as fillers and pigments, can yield improved sealing, adhesion, preservative or decorative films when they are prepared by first suspending the inorganic particulate fillers and pigments in the molten resin components of the formulation, then emulsifying this suspension in water and finally combining the aqueous dispersion obtained with the rubber latex and the other ingredients of the final compound.

Abstract: This invention is directed to an apparatus and method for secondary curing of a selectively photocured liquid polymer polymeric printing plate by mechanically stripping the selectively photocured printing plate to remove at least substantially all of the uncured liquid composition and placing the stripped printing plate under an inert liquid, in particular water, and exposing it to actinic light.

Abstract: Certain fluorinated dimethyl ethers have been found to possess the stability, the compatibility and sufficient freedom from deleterious physiological effects to be used as aerosol propellants in cosmetic, hygienic, pharmaceutical and other personal products. Bis(difluoromethyl) ether is also free of the chlorine atoms believed responsible for some destruction of ozone in the upper atmosphere. Bis(difluoromethyl) ether and carbon dioxide provides a combined gaseous and liquefied propellant system having improved aerosol pattern and emptying characteristics and eliminates the compressed gas effect usually shown by use of carbon dioxide in propellant systems.

Abstract: Methyl trifluorovinyl ether can be stabilized with respect to liquid and vapor phase deflagration or explosive potential by the addition of certain fluorohaloalkanes to the methyl trifluorovinyl ether.

Abstract: Bioimplant three dimensional latice of hydrophilic polyurethane having a backbone of polyetherol or polyesterol, end-capped with aliphatic or aromatic diisocyanate, chain branched with polyol and bound into a latice by chain extension alkyl diols. The method of producing such a latice. An extension would be the use of the latice for other medical and veterinary purposes.

Abstract: An elastic joint-spanning waterstop of particular design for use in a method of sealing joints, in particular expansion joints between concrete sections in roads, bridge and parking deck structures against passage of water, dirt, etc., is described. In the method, recesses are formed in the concrete surface on each side of the joint and the specially designed flexible elastic joint-spanning waterstop element is placed therein, and thereafter a layer of rigid-setting grout is then placed over the element. The waterstop element is in the form of a continuous strip having in cross-section a center portion for location in the joint, and lateral joint-spanning web portions. The webs have a number of openings therethrough to admit fluid grout therein. An upstanding rib is placed between the openings and the center section and is spaced therefrom.

Abstract: Disclosed herein are aqueous dispersions of blocked hydrophilic polyether urethane prepolymers and codispersions thereof with synthetic polymer latices. Also disclosed are methods of preparing the dispersions as well as polyurethane coatings and films prepared therewith. The dispersion/codispersions are characterized by good mechanical stability and resistance to freeze - thaw cycles. Coatings, films and impregnated articles prepared therefrom possess good physical properties. Coatings and films prepared from codispersions containing acrylic latex possess physical properties, chemical solvent resistance, etc. comparable to solvent-based urethanes.

Abstract: Porous, fibrous materials such as non-woven polyester or polypropylene web materials, cotton web, paper and other materials are saturated with a storage stable one-package latex composition. The latex composition is modified with a temperature sensitive cross-linking agent and neutralizing agents. The latex composition is tailored such that a fibrous material may be impregnated and dried at controlled temperature whereby a thermoplastic resin saturant web intermediate stock material having thermoset properties is produced. The cross-linking system in the latex composition is later activated in a specific manufacturing process at heat forming and molding temperatures to obtain a specifically shaped manufacture of desired rigidity and flexibility.

Abstract: An improved additive composition for accelerating the rate of hydration and increasing the compressive strength of hydraulic cement compositions such as Portland cement concrete contains a chloride, formate or nitrite salt set accelerator, an amine and a small amount of a certain select synthetic non-ionic surface active agent.

Abstract: The invention disclosed is for a foam sheet fabric prepared using a hydrophilic crosslinked polyurethane component prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with large amounts of an aqueous reactant. The resultant fabrics may be characterized with a broad spectrum of improved properties including improved comfort, moisture control, ease of processing and may contain selective additives such as fibers, fire retardants or the like.

Abstract: Disclosed is an electrostatic coating device and method employing highly charged particles that are charged remote from the articles to be coated and then delivered to an area where they are to be applied by conveying them in a moving air stream. The movement is stopped by closing off the air stream, suspending the particles in space. Thereafter the particles are applied to an article by electrostatics. Special components are a powder entraining device which uses air fed at the bottom to erode the powder, feeds additional air from above and removes entrained powder from below; a charging device using the reaction of two converging opposed vortexes to oscillate the powder turbulently through an isolated high voltage electrical zone; and a multiple valve that feeds the charged powder to a can and vents the can, then isolates the can, bypassing the powder.

Abstract: A growing medium for seeds, cuttings, plants and the like contains partially combusted bark particles obtained from bark-burning boiler furnaces of pulp processing concerns. The bark particles possess physical and chemical properties ideally suited for use in growing media, especially so-called "soilless" growing media for container-growing. The combusted bark particles are combined with other materials conventionally utilized in horticultural growing media.

Abstract: Distinct lengths of post-applied waterstop strips are spliced together by wrapping them in contour fitting flexible union shells provided with a solid baffle having a transverse cross-sectional shape identical to that of said strips. Conventional adhesive is placed on all contacting surface and the two-strip assembly is then secured by means of bars and bolts.

Abstract: Waterstop for use in jump or slip casting of concrete comprising two strips of T-shaped transverse cross-section which can be fastened together by means of bars and bolts after the first strip has been embedded at the edge of a concrete mass. After fastening the second strip to the first, the second mass of concrete is poured to embed said second strip.

Abstract: Certain new halogenated cyclobutanes have been synthesized and found to possess utility as inhalation anesthetics. They are: 1,4-dichloro-1,2,2-trifluorocyclobutane, 1-chloro-1,2,2,4-tetrafluorocyclobutane, 1,4-dichloro-1,2,2,4-tetrafluorocyclobutane, 1-chloro-1,2,2,3,3-pentafluorocyclobutane, 1,2,2-trifluorocyclobutane, 1-chloro-2,3,3-trifluorocyclobutane, 1-chloro-2,4 4-trifluorocyclobutane, 1-bromo-1,2,2-trifluorocyclobutane, 1-bromo-2-methyl-1,4,4-trifluorocyclobutane and 1-bromo-2-chloro-1,4,4-trifluorocyclobutane.

Abstract: Improved thermosetting sealing materials, for example polyurethane or polysulphide compositions which can be cured in a high frequency alternating electric field, are described which contain electrically non-conducting pigments and/or filler whose dielectric constant exceeds 200.