摘要:
A curable resin composition comprising a (meth)acrylate monomer having an aromatic ring, a non-conjugated vinylidene group-containing compound represented by the general formula below, and a thermal or a photo-radical polymerization initiator makes it possible to produce a cured product with minimized occurrence of burring during molding and high product yield after molding. The cured product has good heat coloration resistance and low Abbe's number. R11, R12, R15, and R16 represent a substituent and A represents an atomic group necessary for forming a cyclic structure.
摘要:
A copolymer contains a structure unit represented by Chemical formula 1 and a structure unit represented by Chemical formula 2, where R represents a hydrogen atom or a methyl group, X represents a hydrogen atom or a cation, L1 and L2 each, independently represent alkylene groups having 2 to 18 carbon atoms.
摘要:
A curable resin composition comprising a (meth)acrylate monomer having an aromatic ring, a non-conjugated vinylidene group-containing compound represented by the general formula below, and a thermal or a photo-radical polymerization initiator makes it possible to produce a cured product with minimized occurrence of burring during molding and high product yield after molding. The cured product has good heat coloration resistance and low Abbe's number. R11, R12, R15, and R16 represent a substituent and A represents an atomic group necessary for forming a cyclic structure.
摘要:
The invention pertains to an aqueous dispersion of particles of a polymer having a functional group for cross-linking, which is obtainable by a free radical emulsion polymerization of at least two different ethylenically unsaturated monomers, a surfactant of the formula M+.-OOC-CH=CHCOOR, wherein R is C(6-22) alkyl and M+ is Na+, K+, Li+, NH4+, or a protonated or quaternary amine, and a co-reactive compound having at least two groups capable of reacting with the functional group for cross-linking, characterized in that the glass-transition temperature (Tg) of the polymer at the center of the particle is different from the Tg of the polymer at the surface of the particle, the difference being at least 55° C., and the Tg of the polymer having the highest Tg is at least 40° C.
摘要:
The invention pertains to an aqueous dispersion of particles of a polymer having a functional group for cross-linking, which is obtainable by a free radical emulsion polymerization of at least two different ethylenically unsaturated monomers, a surfactant of the formula Mnull.nullOOCnullCHnullCHCOOR, wherein R is C(6-22) alkyl and Mnullis Nanull, Knull, Linull, NH4null, or a protonated or quaternary amine, and a co-reactive compound having at least two groups capable of reacting with the functional group for cross-linking, characterized in that the glass-transition temperature (Tg) of the polymer at the center of the particle is different from the Tg of the polymer at the surface of the particle, the difference being at least 55null C., and the Tg of the polymer having the highest Tg is at least 40null C.