摘要:
A primer composition comprising (A) a vinyl polymer having hydrolyzable silyl groups and/or SiOH groups and organic UV-absorbing groups and (B) an organopolysiloxane cures into a primer layer having a coefficient of linear expansion equal to or less than 150×10−6/° C., which allows a polysiloxane hard coat to be applied thereon.
摘要:
A plastic article is provided wherein a plastic substrate is coated with multiple resin layers including a primer layer comprising a polymer having a UV-absorptive functional group incorporated therein and a weather resistant hardcoat layer comprising a reaction product of alkoxysilyl-containing benzophenone and/or a hydrolyzate thereof.
摘要:
A primer composition for a polysiloxane hard coating is provided. This primer composition comprises (A) a vinyl polymer having a hydrolyzable silyl group and/or SiOH group and an organic UV absorbing group bonded to its side chain, and (B) fine silica particles dispersed in an organic solvent, and the primer layer formed after coating and curing has a coefficient of linear expansion of up to 150×10−6/° C.
摘要:
A polycarbonate resin laminate which has excellent scratch resistance and UV shielding property as well as high weatherability and durability sufficient for enduring long term open air exposure without detracting from excellent the transparency is provided. This polycarbonate resin laminate comprises a substrate (1) comprising a polycarbonate resin layer (1-i) and a thermoplastic (meth)acrylic resin layer having a UV absorbing group immobilized thereto (1-ii) on at least one surface of the polycarbonate resin (1-i); and a cured film (2) of a scratch resistant coating composition containing UV absorbing inorganic oxide fine particles and/or an organic UV absorber on the layer of the thermoplastic (meth)acrylic resin having a UV absorbing group immobilized thereto (1-ii). The laminate has a haze of up to 2%.
摘要:
A method for preparing a primer composition adapted to form a polysiloxane hard film on a cured primer layer of the composition comprising processes [1] or [2]: the process [1] comprising the steps of (I) preparing a primer precursor containing a vinyl polymer having a hydrolysable silyl group and an organic UV absorbing group bonded at side chains thereof and silica fine particles dispersed in an organic solvent; (II) adding water to the primer precursor obtained in (I) for hydrolysis; and (III) adding a dehydrating agent to the composition containing the hydrolyzate obtained in (II) to remove moisture from the composition; or the process [2] comprising (IV) hydrolyzing a vinyl polymer having a hydrolysable silyl group and an organic UV absorbing group bonded at side chains thereof by addition of water thereto; (V) adding silica fine particles dispersed in an organic solvent to the resulting hydrolyzate obtained in (IV); and (VI) adding a dehydrating agent to the composition obtained in (V) to remove moisture from the composition.
摘要:
A UV-shielding silicone coating composition comprises (A) a dispersion in a dispersing medium of composite zinc oxide nanoparticles which are obtained by coating zinc oxide nanoparticles with an oxide or hydroxide of Al, Si, Zr or Sn, the dispersion having a photocatalytic degradability of up to 25%, (B) a silicone resin, (C) a curing catalyst, and (D) a solvent, the solids content of composite zinc oxide nanoparticle dispersion (A) being 1 to 50% by weight based on silicone resin (B). The composition is transparent to visible light, mar resistant, UV-shielding, weatherable, and durable.
摘要:
A weather-resistant hard coating composition to be used for direct coating on at least one surface of an organic resin substrate, the composition containing the following components. (1) A silicone resin resulting from (co)hydrolysis and condensation of at least one selected from those alkoxysilanes represented by the following formulas (1-1), (1-2), and (1-3) or condensates of their partial hydrolyzates, (R1)m(R2)nSi(OR3)4-m-n (1-1) (R4O)3-p(R6)pSi—R8—Si(R7)q(OR5)3-q (1-2) X—[(R15)Si(R16)y(OR17)3-y]z (1-3) (2) A vinyl copolymer having in its side chain an organic ultraviolet-absorbing group and a reactive group selected from an alkoxysilyl group, hydroxyl group, epoxy group, carboxylic acid group, and amino group, (3) A curing catalyst, and (4) A solvent. The silicone resin as component (1) and the vinyl copolymer as component (2) exist in such amounts in terms of solids that the ratio of (1)/(2) is from 10/90 to 50/50 by weight.
摘要:
A silicone coating composition is provided comprising (A) a hydrolytic condensate obtained by (co)hydrolytic condensation of an alkoxysilane, (B) colloidal silica, (C) a urethane-modified vinyl polymer, (D) a curing catalyst, and (E) a solvent, the solid content of component (C) being 1 to 30% by weight based on the total solid content of components (A) and (B). The silicone coating composition can be coated and cured to an organic resin substrate without a need for primer, and the cured coating is abrasion resistant and transparent to visible light.