The present invention relates to a pressure-sensitive adhesive composition, a protective film, an optical element, and a display device. A pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to the present invention can have proper high-speed and low-speed peel strengths and simultaneously can exhibit an excellent balance between the high-speed and low-speed peel strengths. The pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention exhibits a proper level of surface resistance and excellent electrostatic discharge characteristics, and has no contaminants with respect to an adherend even when the pressure-sensitive adhesive sheet is peeled from the adherend after the pressure-sensitive adhesive sheet is attached to the adherend for a long period of time. Such a pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention can be applied to various fields of applications. For example, the pressure-sensitive adhesive sheet can be used as a protective film for optical members such as polarizing plates.

The present invention relates to a pressure-sensitive adhesive composition, a protective film, an optical element, and a display device. A pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to the present invention can have proper high-speed and low-speed peel strengths and simultaneously can exhibit an excellent balance between the high-speed and low-speed peel strengths. The pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention exhibits a proper level of surface resistance and excellent electrostatic discharge characteristics, and has no contaminants with respect to an adherend even when the pressure-sensitive adhesive sheet is peeled from the adherend after the pressure-sensitive adhesive sheet is attached to the adherend for a long period of time. Such a pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention can be applied to various fields of applications. For example, the pressure-sensitive adhesive sheet can be used as a protective film for optical members such as polarizing plates.

A comb copolymer with a polymer backbone having grafted lateral macromonomer segments, the method of preparing, and the use thereof as a thickener in cosmetics. The polymer backbone is more than 55% and up to 90% molar ATBS, between 1% and 20% molar cationic monomer or monomer of formula (I): CH.sub.2C(R.sub.1)C(O)Y(CH.sub.2)m-N(R.sub.2) (R.sub.3), where m is between 1 and 4, Y is O or NH, R1 is H or CH.sub.2, and R.sub.2 and R.sub.3 are each a methyl or ethyl radical, and optionally 0.005% to 1% molar of at least one cross-linking monomer with at least two CC bonds. The lateral macromonomer segments are polymerized from 9% to 30% molar of N-alkyl acrylamide or N,N-dialkyl acrylamide of formula (II): CH.sub.2C(R.sub.4)C(O)N(R.sub.5) (R.sub.6), where R.sub.4 is H or CH.sub.2 and R.sub.5 and R.sub.6 are H or a C.sub.1 to C.sub.3 alkyl radical, with at least one of R.sub.5 or R.sub.6 not being H.

A comb copolymer with a polymer backbone having grafted lateral macromonomer segments, the method of preparing, and the use thereof as a thickener in cosmetics. The polymer backbone is more than 55% and up to 90% molar ATBS, between 1% and 20% molar cationic monomer or monomer of formula (I): CH.sub.2C(R.sub.1)C(O)Y(CH.sub.2)m-N(R.sub.2) (R.sub.3), where m is between 1 and 4, Y is O or NH, R1 is H or CH.sub.2, and R.sub.2 and R.sub.3 are each a methyl or ethyl radical, and optionally 0.005% to 1% molar of at least one cross-linking monomer with at least two CC bonds. The lateral macromonomer segments are polymerized from 9% to 30% molar of N-alkyl acrylamide or N,N-dialkyl acrylamide of formula (II): CH.sub.2C(R.sub.4)C(O)N(R.sub.5) (R.sub.6), where R.sub.4 is H or CH.sub.2 and R.sub.5 and R.sub.6 are H or a C.sub.1 to C.sub.3 alkyl radical, with at least one of R.sub.5 or R.sub.6 not being H.

A coating composition for a food or beverage can that includes an emulsion polymerized latex polymer formed by combining an ethylenically unsaturated monomer component with an aqueous dispersion of a water-dispersible polymer.

This invention relates to monodisperse cross-linked hydrogel polymer particles comprising a polymer formed from (a) a hydrophilic vinylic monomer; and (b) a crosslinker comprising at least two vinyl groups. The invention also relates to monodisperse seed particles with a Z-average diameter of from 100 nm to 1500 nm that comprise a plurality of non-crosslinked oligomers of poly N,N-dimethylacrylamide. Also provided are methods of forming the monodisperse cross-linked hydrogel polymer particles and monodisperse seed particles.

This invention relates to monodisperse cross-linked hydrogel polymer particles comprising a polymer formed from (a) a hydrophilic vinylic monomer; and (b) a crosslinker comprising at least two vinyl groups. The invention also relates to monodisperse seed particles with a Z-average diameter of from 100 nm to 1500 nm that comprise a plurality of non-crosslinked oligomers of poly N,N-dimethylacrylamide. Also provided are methods of forming the monodisperse cross-linked hydrogel polymer particles and monodisperse seed particles.

This invention relates to monodisperse cross-linked hydrogel polymer particles comprising a polymer formed from (a) a hydrophilic vinylic monomer; and (b) a crosslinker comprising at least two vinyl groups. The invention also relates to monodisperse seed particles with a Z-average diameter of from 100 nm to 1500 nm that comprise a plurality of non-crosslinked oligomers of poly N,N-dimethylacrylamide. Also provided are methods of forming the monodisperse cross-linked hydrogel polymer particles and monodisperse seed particles.

Disclosed is a method for producing an aldehyde crosslinked polyacrylamide composition useful for strengthening paper. The method includes steps, wherein a) an aldehyde crosslinker and polyacrylamide are mixed in water to form an aqueous solution of aldehyde crosslinked polyacrylamide prepolymer; b) acid is added to the aqueous prepolymer solution to adjust the pH of the solution to a value from 1 to 5; c) storing and transporting the prepolymer solution to the location where the final glyoxalated polyacrylamide composition will be used; and d) adding a base to the stabilized prepolymer solution to adjust the pH of the solution to a value from 5.5 to 12, and e) allowing the aldehyde crosslinker and polyacrylamide contained in the aldehyde crosslinked polyacrylamide prepolymer solution to react further and form aldehyde crosslinked polyacrylamide composition useful for strengthening paper.

Disclosed is a method for producing an aldehyde crosslinked polyacrylamide composition useful for strengthening paper. The method includes steps, wherein a) an aldehyde crosslinker and polyacrylamide are mixed in water to form an aqueous solution of aldehyde crosslinked polyacrylamide prepolymer; b) acid is added to the aqueous prepolymer solution to adjust the pH of the solution to a value from 1 to 5; c) storing and transporting the prepolymer solution to the location where the final glyoxalated polyacrylamide composition will be used; and d) adding a base to the stabilized prepolymer solution to adjust the pH of the solution to a value from 5.5 to 12, and e) allowing the aldehyde crosslinker and polyacrylamide contained in the aldehyde crosslinked polyacrylamide prepolymer solution to react further and form aldehyde crosslinked polyacrylamide composition useful for strengthening paper.