The invention relates to a papermaking agent composition, preferably in powder form, which comprises a water-soluble polymer, which comprises 21-30 mol-% of vinylamine units and has an average molecular weight of at least 1 000 000 Da. The invention relates also to a method for treating of fiber stock in manufacture of paper, board or the like, where a thick fiber stock is obtained, it is diluted to a thin fiber stock having a consistency <3% by addition of water, and the thin fiber stock is drained and a continuous fibrous web is formed. The papermaking agent composition is added to the thick fiber stock or to the thin fiber.

The invention relates to a papermaking agent composition, preferably in powder form, which comprises a water-soluble polymer, which comprises 21-30 mol-% of vinylamine units and has an average molecular weight of at least 1 000 000 Da. The invention relates also to a method for treating of fiber stock in manufacture of paper, board or the like, where a thick fiber stock is obtained, it is diluted to a thin fiber stock having a consistency <3% by addition of water, and the thin fiber stock is drained and a continuous fibrous web is formed. The papermaking agent composition is added to the thick fiber stock or to the thin fiber.

Provided is an aqueous liquid composition including a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The polymer is at least one polymer selected from the group consisting of a polysaccharide, polyamino acid, polyvinyl alcohol, polyallylamine, polyvinylamine, a polyamidine, a polyethylenimine, and their derivatives.

Provided is an aqueous liquid composition including a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The polymer is at least one polymer selected from the group consisting of a polysaccharide, polyamino acid, polyvinyl alcohol, polyallylamine, polyvinylamine, a polyamidine, a polyethylenimine, and their derivatives.

The present disclosure relates to coated substrates, capillaries and microfluidic channels which exhibit an extended shelf life compared to uncoated substrates. More specifically the disclosure relates to charged coatings at physiological pH which may prolong the shelf life of the substrate, capillary or microfluidic channel before being applied to biological fluids. Said shelf life is measured by the ability to provide a low fluid contact angle after an extended storage interval in ambient atmospheric conditions.

The present disclosure relates to coated substrates, capillaries and microfluidic channels which exhibit an extended shelf life compared to uncoated substrates. More specifically the disclosure relates to charged coatings at physiological pH which may prolong the shelf life of the substrate, capillary or microfluidic channel before being applied to biological fluids. Said shelf life is measured by the ability to provide a low fluid contact angle after an extended storage interval in ambient atmospheric conditions.

The present invention provides a composition enabling to form a fine negative photoresist pattern free from troubles such as surface roughness, bridge defects or unresolved defects, and the invention also provides a pattern formation method employing that composition. The composition is used for miniaturizing a resist pattern by applying to a negative resist pattern from a chemically amplified resist composition and fattening the resist pattern. This composition comprises a polymer comprising a repeating unit having an amino group or a polymer mixture, and a solvent, and further comprises a specific amount of an acid or indicates a specific pH value. The polymer mixture comprises polymers whose HSP distance, determined from Hansen solubility parameter, is 3 or more. In the pattern formation method, the composition is cast on a negative photoresist pattern beforehand obtained by development with an organic solvent developer and is then heated to form a fine pattern.

The present invention provides a composition enabling to form a fine negative photoresist pattern free from troubles such as surface roughness, bridge defects or unresolved defects, and the invention also provides a pattern formation method employing that composition. The composition is used for miniaturizing a resist pattern by applying to a negative resist pattern from a chemically amplified resist composition and fattening the resist pattern. This composition comprises a polymer comprising a repeating unit having an amino group or a polymer mixture, and a solvent, and further comprises a specific amount of an acid or indicates a specific pH value. The polymer mixture comprises polymers whose HSP distance, determined from Hansen solubility parameter, is 3 or more. In the pattern formation method, the composition is cast on a negative photoresist pattern beforehand obtained by development with an organic solvent developer and is then heated to form a fine pattern.

A method, and an article made therefrom, of: contacting a substrate with a first solution of a first polyelectrolyte polymer to form a layer of the first polyelectrolyte polymer on the substrate; and contacting the layer of the first polyelectrolyte polymer with a second solution of a second polyelectrolyte polymer to form a layer of the second polyelectrolyte polymer on the layer of the first polyelectrolyte polymer. The first polyelectrolyte is a polyanion or polycation polymer. The second polyelectrolyte is a polyanion or polycation polymer of a charge opposite to that of the first polyelectrolyte polymer. At least one of the first solution or the second solution is an aggregate-forming solution comprising an ionic species having at least two discrete sites of a charge opposite to that of the polyelectrolyte polymer in the aggregate-forming solution. The ionic species forms, via bridging interactions, aggregates of the polyelectrolyte polymer that remain intact in the aggregate-forming solution during the contact and layer formation.

A method, and an article made therefrom, of: contacting a substrate with a first solution of a first polyelectrolyte polymer to form a layer of the first polyelectrolyte polymer on the substrate; and contacting the layer of the first polyelectrolyte polymer with a second solution of a second polyelectrolyte polymer to form a layer of the second polyelectrolyte polymer on the layer of the first polyelectrolyte polymer. The first polyelectrolyte is a polyanion or polycation polymer. The second polyelectrolyte is a polyanion or polycation polymer of a charge opposite to that of the first polyelectrolyte polymer. At least one of the first solution or the second solution is an aggregate-forming solution comprising an ionic species having at least two discrete sites of a charge opposite to that of the polyelectrolyte polymer in the aggregate-forming solution. The ionic species forms, via bridging interactions, aggregates of the polyelectrolyte polymer that remain intact in the aggregate-forming solution during the contact and layer formation.