摘要:
There are provided a radical polymerizable composition having a low viscosity suitable for coating, a cured product obtained by curing the composition, the cured product having a high refractive index and high toughness and being not easily cracked or chipped when cutting, and a plastic lens obtained by curing the composition. A radical polymerizable composition includes phenylbenzyl (meth)acrylate (A), a urethane (meth)acrylate (X) having an aromatic ring in its molecular structure, and a radical polymerization initiator (Y) as essential components.
摘要:
An aqueous resin composition for a coating of the invention comprises an aqueous composition (A) of a reaction product (3); and an acrylic resin emulsion (B), wherein the reaction product (3) is obtained by polymerizing, in a modified epoxy resin (1), a vinyl monomer component (2) comprising a carboxyl group-containing vinyl monomer (2a), wherein the modified epoxy resin (1) is a product of a reaction of at least an epoxy resin (1a) comprising an aromatic epoxy resin (1a-1) and an amine (1b), the aqueous composition (A) of the reaction product (3) is a dispersion or solution of the reaction product (3) in water, wherein the reaction product (3) is neutralized with a basic compound, and the weight ratio ((A)/(B)) based on a solids basis of the aqueous composition (A) to the acrylic resin emulsion (B) is in the range of 50/50 to 95/5. The aqueous coating resin composition for a coating of the invention can provide an aqueous coating which resists water-whitening and is prevented from being reduced in corrosion resistance.
摘要:
An object with a coating comprising: a) covalent bonds formed by reaction of a thiol group and a carbon-carbon double bond, b) covalent bonds formed by reaction of a thiol group and epoxide group, c) covalent bonds formed by a reaction of a carbon-carbon double bond and an epoxide group, said coating comprising a first primer coating and a second coating, said coating comprising covalent bonds between said first and second coatings, said first primer coating comprising covalent cross links between compounds, in the first coating the fraction (r3=ta/tc) of unreacted thiol groups (ta) to thiol groups which have reacted to form a covalent bond (tc) does not exceed 0.11, wherein the half height peak width of tan delta does not exceed 30° C. Advantages of the dual cure composition is that excellent strength is obtained and that the second curing is slow compared to the first initial curing.
摘要:
There are provided a radical polymerizable composition having a low viscosity suitable for coating and a cured product and a plastic lens each obtained by curing the composition, the cured product having a high refractive index, good adhesiveness to a plastic film substrate, and good adhesiveness kept even under high-temperature and high-humidity conditions. The radical polymerizable composition includes phenylbenzyl (meth)acrylate (A), an epoxy (meth)acrylate (X) having an aromatic ring in its molecular structure, and a radical polymerization initiator (Y) as essential components.