Abstract: A shark repellant patch is provided which includes a highly flexible, impermeable membrane sealing a shark repelling substance to a highly flexible base. The membrane is provided with imperfections that cause the membrane to shear when it is subjected to a predetermined level of force. In one embodiment of the invention, a tab is provided proximate the imperfections to facilitate rupturing the membrane. An adhesive is applied to a portion of the base. An exemplary method of fabrication is also provided.

Abstract: Acryl modified polyester resins are prepared by a process which comprises reacting an acid mixture with an alcohol mixture to form hydroxyl polyester prepolymers, solution polymerizing acryl monomers with acidic acryl monomers having carboxyl groups to form acryl resins, and reacting said hydroxyl polyester prepolymers with said acryl resins and polycarboxylic acids having at least two carboxyl groups.A powder coating composition is composed of inorganic pigment or organic pigment, a flowing agent, a curing agent, a curing accelerator, other stabilizers and the acryl modified polyester resins prepared according to the above process.

Abstract: A process is provided for preparing improved aqueous gelatin compositions for improved coatings, particularly light sensitive photographic coatings, wherein a viscosity increasing amount of a copolymer of an alkali metal or ammonium salt of a sulfonic acid containing polymer with an unsaturated monomer, particularly a copolymer of acrylamide and sodium-2-acrylamido-2-methylpropanesulfonate, is added to an aqueous gelatin composition at a point immediately before any point which requires a high viscosity after and a low viscosity before the addition.

Abstract: Cyclodextrin is refined by performing a crystallization step in the presence of a hydrogen bond inhibitor. The hydrogen bond inhibitor includes a base in an amount to adjust the pH of the solution to 8 and above or a non-base such as urea, guanidium hydrochloride and sodium lauryl sulfate in an amount of 0.1% to 2%.

Abstract: An adhesive composition, primarily intended as a tissue adhesive, comprised of cross-linked proteinaceous material, and methods for its use.

Abstract: Novel coating compositions containing modified cellulose esters are disclosed. The modified cellulose esters contain acid functionality, permitting their dispersion in aqueous systems. The modified cellulose esters are particularly useful as rheology control agents in coatings which are applied as waterborne dispersions. The novel coating compositions are used to produce coated substrates with desirable appearance characteristics.

Abstract: The present invention relates to two-component, aqueous polyurethane coating compositions which may be cured at ambient temperature and which containI) a polyisocyanate mixture having an NCO content of 10 to 47% by weight and containing isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:5, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and a monoalcohol containing at least 1 carbon atom and having a molecular weight of up to 500, andII) a water dispersible or water soluble polyol, wherein components I and II are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to hydroxyl groups of 0.8:1 to 6:1.The present invention is also directed to the coatings prepared from these coating compositions.

Abstract: Disclosed herein is a polyvinyl chloride resin composition for powder molding which comprises granular polyvinyl chloride resin (as component A), particulate polyvinyl chloride resin (as component B), stabilizer, plasticizer, and saccharide (as component C). Disclosed also herein is a process for producing said resin composition by mixing granular polyvinyl chloride resin (as component A), particulate polyvinyl chloride resin (as component B), stabilizer, plasticizer, and saccharide (as component C). The resin composition is suitable for the production of covering materials for automotive interior.

Abstract: Provided are light-absorbing polymers which contain backbone unsaturations and which are produced by knoevenagel condensation and which are useful for imparting color and/or ultraviolet light screening properties to thermoplastic resins. The polymeric colorants or UV absorbers may be added during the formation of the uncolored thermoplastic polymer or melt or solution blended with other thermoplastic polymers.

Abstract: Most color proofing constructions use photooligomers that are tacky, require an oxygen barrier to protect the colorant layer and have a short shelf life. The use of alkali soluble photopolymers in the colorant layer of a color proofing construction provides a more easily processable proofing construction, eliminates the need for an oxygen barrier and has improved shelf life of the photopolymer. The proofing construction has a flexible support base film and a colorant layer coated thereon, wherein the colorant layer comprises a colorant and an alkali soluble photopolymer.

Abstract: Memory enhancing thermal proteins were synthesized from heating aspartic acid, glutamic acid, proline and tryptophan above 100.degree. C. Two hydrophobic and one non-hydrophobic polymer were injected intracerebroventricularly into the brains of mice after the mice had undergone partial training in footshock avoidance conducted in a T-maze. When retention of footshock avoidance was tested one week later, the hydrophobic polymers enhanced retention while the non-hydrophobic polymer did not.

Abstract: The process entails adding salt in an amount of 1% to 5% by weight slurry to an aqueous slurry of cyclodextrin-guest complex at a temperature of 100.degree. C. to 150.degree. C. for a period of 5 minutes to 2 hours and a pressure of 15 psia to 70 psia to prevent the slurry from boiling and to cause the complex to break apart. The individual cyclodextrin and guest are then recovered.

Abstract: This invention relates to a process for coating a substrate other than polyvinyl chloride which comprises contacting said substrate with a fast drying, moisture curable, low volatility organic coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Abstract: Powder-form preparations of surface-active alkyl glycosides contain 5 to 65% by weight of a surface-active alkyl glycoside and 35 to 95% by weight of an inert inorganic support. They are produced by mixing the crude product obtained in the industrial production of the alkyl glycosides with water and an inorganic particulate support, for example silica, chalk or sodium chloride, and drying the resulting mixture. Preferred powder-form preparations contain 20 to 50% by weight of the alkyl glycoside and 50 to 80% by weight of an inert inorganic support.

Abstract: The present invention relates to a process for producing methyl hydroxyalkyl cellulose ethers by alkalisation and etherification of celluloses, rinsing the methyl hydroxyalkyl cellulose ethers with water at higher temperatures and recovering the short-chain cellulose ethers that are soluble in the wash water, wherein the wash water containing sodium chloride and organic by-products is passed across a first stage of a membrane filtration having a molecular cut size of 200 to 150,000 Dalton, is concentrated during this process and passes across a second stage of a membrane filtration.

Abstract: Electrodepositable compositions comprising active hydrogen-containing ionic resins, capped polyisocyanate curing agents and triorganotin catalysts are disclosed. The catalysts are liquid, can be easily incorporated into the electrodepositable compositions and surprisingly exhibit good catalytic activity at low levels.

Abstract: Unique phase morphologies of incompatible thermoplastic polymers, including a higher melting temperature polymer and a lower melting temperature polymer that has been sufficiently chemically compatibilized to form a stable interface in a two-phase system, are achieved by pre-melting the higher melting temperature polymer, adding the compatibilized lower melting temperature polymer in solid form thereto, and thereafter melting the lower temperature polymer with mixing. In particular, in poly(ethylene vinyl alcohol)/modified polyolefin systems, compositions containing between about 35 and about 55 wt. percent EVOH are formed in which the poly(ethylene vinyl alcohol) exists as a continuous phase and the modified polyolefin exists as discrete domains dispersed therein. Such blended compositions have gas barrier properties comparable to homogeneous poly(ethylene vinyl alcohol).

Abstract: This invention pertains to foamed algal plastics and products made therefrom, and methods for making algal plastics. The invention also pertains to algal plastic resin precursors for generating the foamed algal plastics and algal plastic products. The foamed algal plastics comprise a foamed and stabilized algal fiber matrix having substantial dimensional stability. The foamed algal plastics can be used, for instance, to generate packing materials, such as molded packings or foamed particles packings (e.g. packing peanuts).

Abstract: This invention is a method for converting fine particles of superabsorbent polymers into larger particles. The invention is primarily directed to aqueous solution processes for preparing superabsorbent polymers. In such aqueous solution polymerization methods, the polymerization reaction product is a high viscosity gel which is dried and ground into particles. In this grinding step, a portion of the product is produced as undesired fine particles having poor absorbency and poor fabrication properties; i.e. they "gel block" and dust. According to the invention, fine superabsorbent polymer particles (up to about 3 parts) are mixed with the high viscosity reaction product gel (100 parts) containing about 20 parts by weight of superabsorbent polymer and water (5 parts per part of recycled particles) to form a mixture with improved rheological properties.

Abstract: The present invention relates to modifying agents for melamine-formaldehyde resins and highly reactive thermosetting resins which are prepared with this agent and consist of 1 mol of melamine, 1.5 to 3.5 mol of formaldehyde, 0.5 to 5% by weight of a polyhydric alcohol, based on the melamine plus formaldehyde, and 0.5 to 10% by weight of the modifying agent, based on the liquid resin. The modifying agent can be added to the melamine-formaldehyde resin as a pulverulent mixture before or during the condensation reaction or in the liquid state in the form of a condensation product prepared in a known manner. The modifying agent consists of 10 to 75% by weight of dicyandiamide, 5 to 70% by weight of cold water-soluble starch (soluble between about 18.degree. and about 25.degree. C.) and 20 to 85% by weight of a guanamine. The highly reactive resins modified in this way are preferably used for coating chipboard and hardboard by a short cycle process.