Abstract: Paper having improved retention properties made by the addition to the papermaking system of a combination of cationic starch and starch phosphate, the starch combination having a select net zeta potential.

Abstract: A one-pass, non-tolerance dependent method for preparing paper size emulsions comprising an aqueous emulsion of a substituted cyclic dicarboxylic anhydride, a colloidal stabilizer, and a surfactant wherein the emulsion after one-pass through a dispersion system has an average particle size of less than 2 microns.

Abstract: A method for preparing hydrophobic starch derivatives wherein starch and an anhydride are reacted in a slurry with the anhydride reagent being added to the slurry in pre-emulsified form to provide a significantly faster and more efficient reaction.

Abstract: An expanded shaped product with improved flexural compressibility and surface properties comprising starch and a hydrophobically modified acid anhydride or its acid hydrolyzed counterpart and the method of preparing such product by extrusion.

Abstract: An expanded shaped product with improved flexural compressibility and surface properties comprising starch and a hydrophobically modified acid anhydride or its acid hydrolyzed counterpart and the method of preparing such product by extrusion.

Abstract: The method of making paper wherein the use of a selected ether or ester modified, cationic starch as an additive in the papermaking wet end provides significantly improves retention and drainage properties particularly in alkaline microparticle containing systems.

Abstract: A paper size composition comprising an aqueous dispersion of:a) a cyclic dicarboxylic acid anhydride containing hydrophobic substitution, andb) a cationic, non-degraded starch which is further modified to a DS of from about 0.005 to 0.4 with either:i) an ether group, R--O-- where R is an hydroxyalkyl or alkyl of 1 to 4 carbon atoms, or alkenyl of 2 to 4 carbon atoms, orii) an ester group, ##STR1## where R is an alkyl of 1 to 4 carbon atoms or alkenyl of 2 to 4 carbon atoms,and wherein the non-degraded, fully modified starch has a viscosity of at least 1,000 cPs at 30.degree. C. in an 8% aqueous solution. The invention also involves the method of sizing paper products using the above described size composition.

Abstract: The invention involves the method of sizing paper products using a size composition comprising an aqueous dispersion of:a) cyclic dicarboxylic acid anhydride containing hydrophobic substitution, and b) cationic, non-degraded starch which is further modified to a DS of from about 0.005 to 0.4 with either:i) an ether group, R--O-- where R is an hydroxyalkyl or alkyl of 1 to 4 carbon atoms, or alkenyl of 2 to 4 carbon atoms, orii) an ester group, ##STR1## where R is an alkyl of 1 to 4 carbon atoms or alkenyl of 2 to 4 carbon atoms, and wherein;the non-degraded, fully modified starch has a viscosity of at least 1,000 cPs at 30.degree. C. in an 8% aqueous solution.

Abstract: A method of preparing high solids liquid starch is provided using a modified two step batch cooking procedure.

Abstract: This invention presents a series of blends of ASA-treated and cationic starches for use as external sizes of paper and paperboard products. The blends contain at least 30% (by wt) of the ASA-treated starch, which is a monoester of the starch and an alkyl or alkenyl succinate and, optionally, from about 0.5 to about 5% (by weight based on the starch) of an Al.sup.3+ salt.

Abstract: A shelf stable paper size is prepared from a mixture of a substituted cyclic dicarboxylic acid anhydride and an ethoxylated castor oil.

Abstract: A shelf stable paper size is prepared from a mixture of a substituted cyclic dicarboxylic acid anhydride and an ethoxylated lanolin.

Abstract: A shelf stable paper size is prepared from a mixture of a substituted cyclic dicarboxylic acid anhydride and an ethoxylated castor oil.

Abstract: A shelf stable paper size is prepared from a mixture of a substituted cyclic dicarboxylic acid anhydride and an ethoxylated lanolin.

Abstract: A size mixture comprising a higher organic ketene dimer and polyoxyalkylene alkyl or alkyl-aryl ether or the corresponding mono- or di-ester is used to size paper products. In accordance with a preferred embodiment the liquid size mixture is added directly to the paper stock system without prior emulsification.

Abstract: A size mixture comprising a substituted cyclic dicarboxylic acid anhydride and polyoxyalkylene alkyl or alkyl-aryl ether or the corresponding mono- or di-ester is used to size paper products. In accordance with a preferred embodiment the liquid size mixture is added directly to the paper stock system without prior emulsification.

Abstract: A size mixture comprising a substituted cyclic dicarboxylic acid anhydride and polyoxyalkylene alkyl or alkylaryl ether or the corresponding mono- or di-ester is used to size paper products. In accordance with a preferred embodiment the liquid size mixture is added directly to the paper stock system without prior emulsification.