Abstract: Provided is an oil-gelling agent that makes it possible to gel a variety of oil agents, such as hydrocarbon oils and higher alcohols. The oil-gelling agent is a copolymer that includes, as structural units, (a) an amphiphilic (meth)acrylic monomer represented by general formula (1) (in which R1 is a hydrogen atom or a methyl group, and R2 is a straight-chain or branched C1-21 alkyl group) and (b) a hydrophilic (meth)acrylic monomer represented by general formula (2) (in which R1 is a hydrogen atom or a methyl group, and R3 is a straight-chain or branched C2-10 alkylene group), the mass ratio (b)/(a) between (a) and (b) satisfying 0<((b)/(a))?0.2.

Abstract: An oil gelling agent that is a copolymer comprising, as constituting units: (a) a hydrophilic (meth)acrylic monomer selected from general formulae (1) and (2) [in formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents an alkylene group] [in formula (2), R1 represents a hydrogen atom or a methyl group, and R3 represents a group selected from among a hydrogen atom, an alkyl group and a hydroxyalkyl group]: (b) a hydrophobic (meth)acrylic monomer represented by general formula (3) [in formula (3), R1 represents a hydrogen atom or a methyl group, and R4 represents a straight-chain alkyl group having 1-24 carbon atoms]; and (c) a crosslinker monomer having two or more radical polymerizable functional groups per molecule. The ratio by mass of (b) to (a) [(b)/(a)] is 0.8-4.0 and the content of monomer (c) in all monomers is 0.05-5 mass %. This oil gelling agent forms a gel having high temperature stability.

Abstract: This is to provide a polymer crosslinking agent which is capable of improving affinity for ester oil. The polymer crosslinking agent is a (meth)acrylic-based graft silicone which comprises (meth)acryl-based repeating units represented by the following formulae (I), (II) and (III) as a main chain, and an unsaturated bond(s) and an organopolysiloxane structure at the side chain. Also, the high molecular weight polymer is an addition polymerization product of the polymer crosslinking agent and an organohydrogen polymer, and a composition is a material in which the high molecular weight polymer is swollen by a liquid oil agent.

Abstract: A cosmetic contains a high molecular weight polymer that is an addition polymerization product between: a polymer crosslinking agent of a (meth)acrylic-based graft silicone having a main chain with (meth)acrylic-based repeating units represented by the following formulae (I), (II), and (III), and side chains with unsaturated bonds and an organopolysiloxane structure; and an organohydrogen polysiloxane represented by the following general formula (4). A represents a group selected from an alkoxy group having 1 to 22 carbon atoms and an aryloxy group having 6 to 20 carbon atoms. B represents a group having an unsaturated bond represented by the following formula (1). C represents a group represented by the following formula (2), (3-1), or (3-2).

Abstract: A cosmetic containing at least one organosiloxane represented by general formula (1), having a boiling point in a range of 205 to 255° C. and a viscosity of less than 5 mm 2/s at 25° C. In the formula, R's are identical to or different from one another and each independently represent a hydrogen group, hydroxy group, or a monovalent hydrocarbon group having 1 to 3 carbon atoms, but at least one R is a monovalent hydrocarbon group having 2 to 3 carbon atoms. “a” represents 1 to 5. Thus, a cosmetic which has light touch, good spread, and excellent water repellency, forms uniform cosmetic film, and successfully achieves favorable feeling on use with no strong oily feeling, and which has excellent stability over time and cosmetic persistence even when blended with various oil agents, such as silicone, hydrocarbon oil, and ester, an organic ultraviolet absorber, or an oily component solid at 25° C.

Abstract: Provided are a surface treatment agent for powder capable of being used to produce a dispersion superior in dispersibility, fluidity and temporal stability; and a dispersion containing a powder treated with such surface treatment agent for powder. The agent is a diblock copolymer whose main chain is comprised of a silicone graft copolymer block represented by a formula [I] and a polar copolymer block represented by a formula [II], wherein one end structure of the main chain is represented by a formula [III], and the other end structure of the main chain is represented by a formula [IV], the formulae [I] to [IV] being expressed as wherein A represents an organopolysiloxane-containing group; B represents a polar group-containing monovalent hydrocarbon group having 1 to 20 carbon atoms, an amino group or a hydroxyl group.

Abstract: A polymeric polymerization initiator represented by the following formula (I). M1aM2bD1cD2dT1eT2fQg (I) M1=R13SiO1/2 M2=R12R2SiO1/2 D1=R12SiO2/2 D2=R1R2SiO2/2 T1=R1SiO3/2 T2=R2SiO3/2 Q=SiO4/2 [R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R2 represents a group having a ketene silyl acetal structure represented by the following formula (II). (A represents a single bond or a divalent organic group, R3 represents a hydrogen atom or a substituted or unsubstituted alkyl group, and R4 represents a substituted or unsubstituted alkyl group.) “a”, “b”, “c”, “d”, “e”, “f”, and “g” represent 0 or a positive integer where b+d+f?1. An order of bonding of siloxane units is optionally determined.

Abstract: A polymeric polymerization initiator represented by the following formula (I). M1aM2bD1cD2dT1eT2fQg (I) M1=R13SiO1/2 M2=R12R2SiO1/2 D1=R12SiO2/2 D2=R1R2SiO2/2 T1=R1SiO3/2 T2=R2SiO3/2 Q=SiO4/2 [R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R2 represents a group having a ketene silyl acetal structure represented by the following formula (II). (A represents a single bond or a divalent organic group, R3 represents a hydrogen atom or a substituted or unsubstituted alkyl group, and R4 represents a substituted or unsubstituted alkyl group.) “a”, “b”, “c”, “d”, “e”, “f”, and “g” represent 0 or a positive integer where b+d+f?1. An order of bonding of siloxane units is optionally determined.

Abstract: This is to provide a polymer crosslinking agent which is capable of improving affinity for ester oil. The polymer crosslinking agent is a (meth)acrylic-based graft silicone which comprises (meth)acryl-based repeating units represented by the following formulae (I), (II) and (III) as a main chain, and an unsaturated bond(s) and an organopolysiloxane structure at the side chain. Also, the high molecular weight polymer is an addition polymerization product of the polymer crosslinking agent and an organohydrogen polymer, and a composition is a material in which the high molecular weight polymer is swollen by a liquid oil agent.

Abstract: A (meth)acrylic silicone graft (co)polymer having a unit represented by the following formula (I), a structure represented by the following formula (III) at one terminal, and a structure represented by the following formula (IV) at the other terminal, wherein A is a group having a linear organopolysiloxane structure represented by the following formula (1) or a group having a dendritic organopolysiloxane structure represented by the following formula (2-1) or (2-2), X? is a group as defined for A, wherein Z is a divalent organic group, Q is a group represented by the following formula (2), D is a (3c+1)-valent organopolysiloxanyl group which has a hierachial order of c, 3c means 3 raised to the power of c, c is an integer of from 1 to 8.

Abstract: A (meth)acrylic silicone graft (co)polymer having a unit represented by the following formula (I), a structure represented by the following formula (III) at one terminal, and a structure represented by the following formula (IV) at the other terminal, wherein A is a group having a linear organopolysiloxane structure represented by the following formula (1) or a group having a dendritic organopolysiloxane structure represented by the following formula (2-1) or (2-2), X? is a group as defined for A, wherein Z is a divalent organic group, Q is a group represented by the following formula (2), D is a (3c+1)-valent organopolysiloxanyl group which has a hierachial order of c, 3c means 3 raised to the power of c, c is an integer of from 1 to 8.