Abstract:
In a cationic modification process for starch, starch is reacted with polymers that contain amino and/or ammonium groups in an aqueous medium at temperatures from 115 to 180 °C under an increased pressure and in the absence of oxidisers, polymerisation initiators and alkali. The reaction is conducted so that maximum 10% by weight starch has its molar weight reduced. Also disclosed is the use of the thus obtained reaction products as dry strength agents for paper.
Abstract:
In a cationic modification process for starch, starch is reacted with polymers that contain amino and/or ammonium groups in an aqueous medium at temperatures from 115 to 180 DEG C under an increased pressure and in the absence of oxidisers, polymerisation initiators and alkali. The reaction is conducted so that maximum 10% by weight starch has its molar weight reduced. Also disclosed is the use of the thus obtained reaction products as dry strength agents for paper.
Abstract:
The present invention relates to the use of water-soluble copolymers consisting of such characteristic structural elements as a) acrylic acid amide of the general formula (I), where R et R stand, independently of each other, for H, alkyl, cycloalkyl, aryl or aralkyl, and b) units of the general formula (II), where A represents a chemical bond or an alkyl group, the R residues stand, independently of each other, for H, alkyl, cycloalkyl, aryl or arakyl or, together with the nitrogen atom to which they are linked, an aromatic or non aromatic five to seven member heterocyclic ring, possibly mono- or polysubstituted, possibly containing one or two more heteroatoms chosen from among O, N or S, and capable of being annelated with another aromatic or non aromatic five to seven member ring, and R represents H, alkyl or aralkyl. The invention also pertains to cosmetics containing said polymers.
Abstract:
The invention concerns a mixture comprising an amino resin and a polymer of which at least 80 weight % consists of C2 to C3 alkylene oxide groups.
Abstract:
The invention relates to solutions of aminotriazine resins, the alkylol groups of which are etherized to at least 30mol % with a C1-C16 alkanol in a mono-C1-C4 alkylglycol of formula (I): R?1-O-(R2-O-)¿w(R3-O-)x(R2-O-)y(R3-O-)zH, in which R1 stands for C¿1?-C4 alkyl, R2 for CH2-CH2 and R?3¿ for (a) and w, x, y, z stand for a whole number from 0 to 10, whereby at least one of the variables w, x, y, z is not equal to 0, or in a solvent mixture consisting to at least 20 wt.% of a mono-C¿1?-C4 alkylglycol of the afore-cited formula.
Abstract:
The invention relates to a method for producing polymers containing carbamate units, wherein polyethylene imines or polymers containing vinyl amine units of formula (III) in which R1 = H or C¿1?-C6-alkyl are made to react with halogen formic acid esters. The invention also relates to the use of the polyethylene imines containing carbamate groups thus obtained or polymers containing vinyl carbamate units as retention agents, dehydrating agents, flocculants and fixing agents in the production of paper, as a protective colloid for the production of aqueous alkyl diketene dispersions and as a dispersing agent for the production of accumulated aqueous filling material slurries.