Abstract: A novel starch ether derivative of which the crosslinking properties may be altered by adjusting the pH of the cook is prepared by reacting under controlled conditions a starch base in aqueous medium with an N-(alkoxymethyl)acrylamide wherein the alkoxy group contains 1-4 carbon atoms, and is preferably an isobutoxy group. The starch derivatives herein may be used as insolubilizing or strengthening agents in adhesives, coatings, and in other applications wherein controlled crosslinking is desirable.

Abstract: Water-insensitive starch fibers having an amylopectin content of about 55 to 100% by weight are prepared by extruding a colloidal starch dispersion in thread-like form into a moving coagulating bath. Water-insoluble additives may be incorporated into the starch dispersion so as to produce a fiber containing the additive in encapsulated form.

Abstract: Adhesive compositions having enhanced bond strength are obtained by mixing a monomeric ester of 2-cyanoacrylic acid with an anionic polymerization inhibitor and from 1 to 30 mmoles per kg. of adhesive of an adhesion promoter of the formula: ##STR1## wherein R' is hydrogen or an alkyl, aryl or cycloalkyl group having 1-10 carbon atoms. Such compositions may be used on a wide variety of substrates and are particularly useful on metals.

Abstract: Curable two-part flexible film laminating adhesives are prepared from:(a) an alcoholic solution of a ketimine and/or amine terminated polyetherurethane-urea prepared by the addition of at least 50% of the stoichiometric equivalent of a diketimine having --NH functionality of 0, 1 or 3 to an isocyanate terminated polyalkylene ether diol urethane prepolymer; and(b) a polyepoxide in a chain-extending and crosslinking amount of about 10-30% by weight, based on the weight of said ketimine and/or amine terminated polyetherurethane-urea solids. Laminates formed using these adhesives are characterized by rapid curing, high bond strength, superior heat resistance as well as chemical and water resistance.

Abstract: Graft copolymers of a water soluble monomer and polysaccharide are prepared employing a two-phase reaction system under controlled conditions. The resultant graft copolymers are formed at high grafting efficiency and high conversion and obtained as precipitated solid beads.

Abstract: Water soluble and water swellable highly substituted polysaccharide derivatives are prepared in highly concentrated aqueous solutions under controlled reaction conditions. The resultant derivatives are produced efficiently and readily isolated in solid form.

Abstract: Improved particle agglomeration of water-absorbent compositions of matter together with improved "wet-out" and consequent absorbent properties are provided by a method for drum drying said compositions under controlled conditions.

Abstract: Improved 2-cyanoacrylate adhesive compositions containing acetic acid exhibit greatly enhanced bond strength with no significant reduction in cure rate. Such compositions may be used on a wide variety of substrates and are particularly useful on metals.

Abstract: A thermoplastic copolyester is formed of at least one aromatic dicarboxylic acid member, at least one aliphatic dicarboxylic acid member (an alkyl- or alkenyl-substituted succinic acid or anhydride thereof), and at least one C.sub.2 -C.sub.10 glycol. Particularly preferred copolyesters are those wherein at least one non-polymeric polyfunctional member is added to the base copolyester composition to function as a chain-extender therefor. The resultant copolyester is useful as an adhesive both by itself and as an ingredient of hot melt or solution adhesive formulations.

Abstract: A copolyester is formed of at least one aromatic dicarboxylic acid member, at least one aliphatic dicarboxylic acid member (an alkyl- or alkenyl-substituted succinic acid or anhydride thereof), at least one C.sub.2 -C.sub.10 glycol, at least one polymeric polyol member, and an optional polymeric polycarboxylic acid member. The polymeric polyol member is either a polymeric polyol having a molecular weight of 300-3,000, or a mixture of polymeric diol having a molecular weight of 300-3,000 and a non-polymeric polyol. The polymeric polyol may be a polyester such as polycaprolactone or a polyether such as a trimethylolpropane/propylene oxide adduct. The preferred resultant thermoplastic copolyester has a glass transition temperature of less than 0.degree. C. and a high polymer melting temperature. It is useful as an adhesive both by itself and as an ingredient of hot melt or solution adhesive formulations.

Abstract: Novel starch ether derivatives are prepared by reacting starch with 3-chloro-2-sulfopropionic acid. The resulting 2-sulfo-2-carboxyethyl starch ether derivatives find use in many applications, but are particularly useful as pigment retention aids in papermaking processes.

Abstract: Pressure sensitive adhesive compositions are prepared from a mixture of an acrylic pressure sensitive polymer, a chlorosulphonated polyethylene and a polymerizable vinyl compound. The compositions are cured to form a strong bond upon contact with a condensation reaction product of a primary or secondary amine and an aldehyde.

Abstract: An improved process for preparing 2-aminoalkyl halide bisulfate salts comprises reacting dry hydrogen halide with 2-aminoalkyl monosulfate esters. The 2-aminoalkyl halide bisulfate salts resulting therefrom are produced in high yields and are used industrially to prepare cationic starch and cellulose derivatives.

Abstract: A granular starch base is reacted with a selected propiolate ester in aqueous medium to produce a granular, acetal cross-linked starch, the cross-linkages of which are substantially removable in acidic medium. The cross-linked starch product thus prepared is useful in producing highly-substituted granular starch derivatives from which the cross-linkages may be readily and substantially removed as desired.

Abstract: A photocurable electroconductive coating composition adapted to be crosslinked and insolubilized by actinic radiation comprises an acrylic monomer, a photoactivatable free radical polymerization initiator and a salt of a copolymerizable organic compound, wherein at least one of the monomers contains more than one polymerizable ethylenically unsaturated group. The cured coatings are insoluble in aqueous and organic solvents and are conductors of electricity suitable for conductive underlayers of photoconductive imaging elements and as antistatic coatings.

Abstract: Actinic radiation curable compositions comprise chemically bonded portions of at least one free radical polymerizable hydroxyalkyl ester of an alpha, beta unsaturated carboxylic acid, at least one non-halogenated cyclic anhydride, at least one epoxide and a halogenated free radical initiator which is activatable by actinic radiation. Upon exposure to actinic radiation, these compositions are cured with very little or no inhibition by atmospheric oxygen.

Abstract: Aqueous slurries or dispersions of starch are reacted with selected N-alkylimidazole-N'-sulfonates under specific reaction conditions to yield starch sulfate esters. The organic by-products produced in the reaction are readily removed by washing or dialysis.

Abstract: Aqueous slurries or dispersions of starch are reacted with ammonium fluorosulfate or an alkali metal fluorosulfate to yield starch sulfate esters. The inorganic by-products produced in the reaction are readily removed by washing or dialysis. These starch products may also be prepared in non-aqueous solvents or by a dry reaction process.

Abstract: A two part adhesive composition characterized by rapid curing and long shelf life is disclosed. The adhesive composition comprises a first component of an acrylic monomer and copper saccharinate or saccharin and a soluble copper salt and a second component comprising an alpha-hydroxy sulfone or an alpha-amino sulfone or mixtures thereof which functions as an activator therefor.

Abstract: Improved pressure sensitive adhesive compositions based on acrylate ester polymers and the substrates coated therewith. The improved adhesive and cohesive properties result from the addition to the polymer of specified quinone ultraviolet sensitizers and the subsequent crosslinking thereof by exposure to an ultraviolet source.