The invention relates to a method for manufacturing thermoplastic poly(vinyl alcohol) derivative in a melt state reaction and a product thereof, wherein the method thermoplastic poly(vinyl alcohol) that has been dried is heated and admixed with an organic acid anhydride that has a catenated carbon structure which ends into a vinyl group, such that a mixture is obtained which is above the melting point of the mixture, thereby causing an ester bond forming condensation reaction in a melt state, wherein at least some of the organic acid anhydride reacts with hydroxyl groups of the thermoplastic poly(vinyl alcohol), such that reaction product is formed which contains carboxylic acid residue and thermoplastic poly(vinyl alcohol) derivative which contains ester bonded pendant chains of which at least some end into vinyl groups. The invention further relates to a method for manufacturing a paper substrate and a product thereof, which contains a primer layer that contains the reaction product.

The invention relates to a method for manufacturing thermoplastic poly(vinyl alcohol) derivative in a melt state reaction and a product thereof, wherein the method thermoplastic poly(vinyl alcohol) that has been dried is heated and admixed with an organic acid anhydride that has a catenated carbon structure which ends into a vinyl group, such that a mixture is obtained which is above the melting point of the mixture, thereby causing an ester bond forming condensation reaction in a melt state, wherein at least some of the organic acid anhydride reacts with hydroxyl groups of the thermoplastic poly(vinyl alcohol), such that reaction product is formed which contains carboxylic acid residue and thermoplastic poly(vinyl alcohol) derivative which contains ester bonded pendant chains of which at least some end into vinyl groups. The invention further relates to a method for manufacturing a paper substrate and a product thereof, which contains a primer layer that contains the reaction product.

Provided are: an additive reaction-type silicone composition that is for release paper or for a release film, that is non-migratory, and that exhibits light releasability with respect to various adhesives, said silicone composition for release paper or for a release film making it possible to form a cured film that does not adversely affect residual adhesive strength or releasability; and a release paper or a release film obtained by applying the composition to a substrate and curing the result. In a silicone composition for release paper or a release film cured by additive reaction, an organopolysiloxane containing an alkenyl group having a terminal unsaturated bond is used as a base polymer, and a specific amount of an organopolysiloxane that has a lower molecular weight than the base polymer and that contains an alkenyl group having a terminal unsaturated bond is mixed with the base polymer.

Provided are: an additive reaction-type silicone composition that is for release paper or for a release film, that is non-migratory, and that exhibits light releasability with respect to various adhesives, said silicone composition for release paper or for a release film making it possible to form a cured film that does not adversely affect residual adhesive strength or releasability; and a release paper or a release film obtained by applying the composition to a substrate and curing the result. In a silicone composition for release paper or a release film cured by additive reaction, an organopolysiloxane containing an alkenyl group having a terminal unsaturated bond is used as a base polymer, and a specific amount of an organopolysiloxane that has a lower molecular weight than the base polymer and that contains an alkenyl group having a terminal unsaturated bond is mixed with the base polymer.

A solvent-free type silicone composition is provided. The composition includes (A) an organopolysiloxane having at least two alkenyl groups each bonded to a silicon atom in a molecule, and having no or at least one aryl group in a molecule; (B1) an organohydrogenpolysiloxane having at least three hydrogen atoms each bonded to a silicon atom in a molecule and an aryl group in a number that a percentage (%) of the total number of the aryl groups relative to the total number of hydrogen atoms and groups each bonded to a silicon atom (hereinafter referred to as percentage of the aryl group) is at least 8%, in an amount such that a ratio of the number of SiH groups in component (B1) to the number of alkenyl groups in component (A) is between 0.5 and 10; and (C) a catalytic amount of a catalyst based on a platinum group metal.

A measuring method, measuring arrangement, and measuring device. A silicone-coated layer is illuminated with a light source. By using an imaging measuring device, an image of the silicone-coated layer is formed. The silicone coverage of the silicone coating is analysed from the image observed by imaging.

A measuring method, measuring arrangement, and measuring device. A silicone-coated layer is illuminated with a light source. By using an imaging measuring device, an image of the silicone-coated layer is formed. The silicone coverage of the silicone coating is analysed from the image observed by imaging.

A cellulosic fiber-based adhesive tape substrate, at least one side of which is coated with an aqueous mixture of: a) at least one organic polymer having pendant groups with at least one vinyl function; b) at least one polysiloxane comprising at least one hydrogenosiloxane monomer (OSiR.sup.1H), wherein R.sup.1 is a linear or branched and/or cyclic hydrocarbon chain which may contain heteroatoms; c) at least one hydrosilylation catalyst.

A cellulosic fiber-based adhesive tape substrate, at least one side of which is coated with an aqueous mixture of: a) at least one organic polymer having pendant groups with at least one vinyl function; b) at least one polysiloxane comprising at least one hydrogenosiloxane monomer (OSiR.sup.1H), wherein R.sup.1 is a linear or branched and/or cyclic hydrocarbon chain which may contain heteroatoms; c) at least one hydrosilylation catalyst.

A method of producing and repulping paper having a silicone release liner includes producing paper having a silicone release liner that is initially secured to the paper by a dissolvable material. During production of the paper, a water-soluble coating may be applied to a paper surface, and a silicone release coating is then applied to the water-soluble coating. Upon rewetting of the paper during repulping, the water-soluble coating dissolves, thereby enabling separation of the silicone release coating from the paper. The repulpable silicone release liner permits recovery of paper fibers using conventional repulping and recycling processes.