A water dispersion of gel particles, in which the gel particles having a polymerizable group, having a three-dimensional crosslinked structure including at least one bond selected from a urethane bond and a urea bond, and including at least a photopolymerization initiator and a resin are dispersed in water, a method of producing the water dispersion, and an image forming method using the water dispersion.

A water dispersion of gel particles, in which the gel particles having a polymerizable group, having a three-dimensional crosslinked structure including at least one bond selected from a urethane bond and a urea bond, and including at least a photopolymerization initiator and a resin are dispersed in water, a method of producing the water dispersion, and an image forming method using the water dispersion.

A radiation-sensitive resin composition includes a polymer and a compound. The compound includes a first structural unit including an aromatic carbon ring to which no less than two hydroxy groups bond, and a second structural unit including an acid-labile group which is dissociable by an action of an acid to give a carboxy group. The compound is represented by formula (1). R.sup.1 represents a monovalent organic group having 1 to 30 carbon atoms; and X.sup.+ represents a monovalent radiation-sensitive onium cation. A weight average molecular weight of the polymer is no greater than 10,000.

R.sup.1—COO.sup.−X.sup.+  (1)

The present invention relates to a hydrophilic acrylic-modified polyurethane and a method for preparing same, and a water-based paint composition using same and a manufacturing method thereof and, more specifically, to a hydrophilic acrylic-modified polyurethane and a method for preparing same, and a water-based paint composition using same and a manufacturing method thereof, the hydrophilic acrylic-modified polyurethane comprising: a polymerization unit derived from an anhydrosugar alcohol-alkylene oxide adduct; a polymerization unit derived from polyisocyanate; and a polymerization unit derived from hydroxyalkyl (meth)acrylate, and capable of providing a water-based paint composition in which eco-friendliness, adhesiveness (adhesion), crack resistance and water resistance are all improved.

An object of the present invention is to provide a photosensitive resin composition having good liquid repellency. The photosensitive resin composition of the present invention at least contains a fluororesin having a crosslinking site, a solvent, and a photopolymerization initiator, and the fluororesin contains a repeating unit derived from a hydrocarbon having a fluorine atom.

Provided is a process for making an ophthalmic devices and ophthalmic devices resulting from the process. The process comprises: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator; (c) contacting the crosslinked substrate network with a grafting composition containing a shrinking agent and one or more ethylenically unsaturated compounds; and (d) activating the covalently bound activatable free radical initiator of the crosslinked substrate network such that the grafting composition polymerizes therein with the crosslinked substrate network.

Provided is a process for making an ophthalmic devices and ophthalmic devices resulting from the process. The process comprises: (a) providing a first reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the first reactive composition to a first activation step such that the first reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator; (c) contacting the crosslinked substrate network with a grafting composition containing a shrinking agent and one or more ethylenically unsaturated compounds; and (d) activating the covalently bound activatable free radical initiator of the crosslinked substrate network such that the grafting composition polymerizes therein with the crosslinked substrate network.

The present invention provides a methacrylic resin composition comprising 100 parts by mass of a methacrylic resin comprising 50 to 97% by mass of a methacrylic acid ester monomer unit (A), 3 to 30% by mass of a structural unit (B) having a ring structure in the backbone, and 0 to 20% by mass of an additional vinyl monomer unit (C) copolymerizable with a methacrylic acid ester monomer, and 0.001 to 0.2 parts by mass of a compound (D) having a predetermined structure, the methacrylic resin composition satisfying the following conditions (I) and (II):
(I): a weight-average molecular weight of the methacrylic resin composition as measured by gel permeation chromatography (GPC) is 65,000 to 300,000, and
(II): a mass ratio between the component (D) and the structural unit (B) having a ring structure in the backbone is 25≤(B)/(D)≤1000.

The present invention relates to curable compositions which comprise (meth)acrylic monomers, ethylenically unsaturated oligomers and a specific multistage polymer additive. The additive is used as a processing aid to reduce cure shrinkage and reduce or prevent the formation of cracks during the polymerization of the composition.

The present invention relates to curable compositions which comprise (meth)acrylic monomers, ethylenically unsaturated oligomers and a specific multistage polymer additive. The additive is used as a processing aid to reduce cure shrinkage and reduce or prevent the formation of cracks during the polymerization of the composition.