摘要:
A polymerizable composition is described, which composition comprises a polyol(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate) monomer, and an additive represented by the general formula, R2—O&Parenopenst;R3O&Parenclosest;x&Parenopenst;R4O&Parenclosest;y&Parenopenst;R5O&Parenclosest;zR6 wherein R2 and R6 are each selected independently from hydrogen, C1-C20 linear or branched alkyl, cycloalkyl having from 5 to 7 carbon atoms in the cyclic ring, aryl, C2-C20 linear or branched alkanoyl, cycloalkanoyl having from 5 to 7 carbon atoms in the cyclic ring and aroyl, R2 and R6 each being free of radically polymerizable ethylenically unsaturated groups; R3O and R5O are the same or different; R4O is different than each of R3O and R5O; R3O, R4O and R5O are each independently a divalent residue of an epoxide; x and z are each independently a number from 0 to 200, provided that the sum of x and z is greater than zero; and y is a number from 3 to 200. The additive is present in the composition of the present invention in an amount at least sufficient such that a polymerizate of the composition is substantially free of tinting defects, such as ferns and moons.
摘要:
Described is a polymerizable organic composition comprising a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and an additive represented by the general formulaR.sub.2 --O--(R.sub.3 O).sub.m --(CH.sub.2 CH.sub.2 O).sub.n-1 --CH.sub.2 CH.sub.2 --Xwherein R.sub.2 is a monovalent organic radical having a terminal ethylenically unsaturated group, e.g., allyl, R.sub.3 O is a divalent radical derived from an epoxide other than ethylene oxide, e.g., butylene oxide, m is a number from 0 to 100, n is a number between 3 and 100, and X is selected from halide, hydroxyl, quaternary ammonium groups, the acid groups acetic acid, sulfonic acid, sulfuric acid, isethionic acid and phosphoric acid, salts of said acid groups, alkoxy groups and carboxylic acid ester groups. The additive is present in the composition in an amount at least sufficient such that a polymerizate, e.g., a plus lens, obtained from said composition is substantially free of tinting defects, e.g., ferns and/or moons.
摘要:
A polymerizable composition is described, which composition comprises a major amount of a polyol(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate) monomer, and a minor amount of a radically polymerizable second monomer represented by the general formula, wherein R2 is a polyvalent linking group that is free of urethane linkages, e.g., R2 may be a residue of a polyisocyanate, such as isophorone diisocyanate; R3 is a residue of a material having a single hydroxy group and at least one allyl group, R3 being free of urethane linkages, e.g., R3 may be a residue of a poly(alkylene glycol) allyl ether, such as poly(1,2-propylene glycol) allyl ether; and j is a number from 2 to 4. The second monomer may also be present in the composition in an amount at least sufficient such that a polymerizate, e.g., a plus ophthalmic lens, obtained from the composition is substantially free of tinting defects, e.g., ferns and/or moons.
摘要翻译:描述了一种可聚合组合物,该组合物包含主要量的多元醇(碳酸烯丙酯)单体,例如二甘醇双(烯丙基碳酸酯)单体和少量由通式表示的可自由基聚合的第二单体,其中R 2是不含氨基甲酸酯键的多价连接基团,例如R 2可以是多异氰酸酯的残基,例如异佛尔酮二异氰酸酯; R 3是具有单个羟基和至少一个烯丙基的物质的残基,R 3不含氨基甲酸酯键,例如R 3, 可以是聚(亚烷基二醇)烯丙基醚的残基,例如聚(1,2-丙二醇)烯丙基醚; 并且j是2至4的数。第二单体还可以以至少足够的量存在于组合物中,使得由组合物获得的聚合物,例如加眼镜片基本上不含着色缺陷,例如 ,蕨类植物和/或卫星。
摘要:
Disclosed is a tinted article formed from a substrate having a refractive index of at least 1.57 comprising at least partially polymerized sulfur-containing polyurethane material and/or at least partially polymerized sulfur-containing polyurethaneurea material; an intermediate coating applied to at least a portion of the substrate; a tintable hardcoat applied to at least a portion of the intermediate coating; and tint applied to at least a portion of the tintable hardcoat. Methods for preparing the tinted articles also are provided.
摘要:
The present invention provides a polyureaurethane composition comprising: a) the reaction product of: 1) a polyurethane prepolymer comprising a polyisocyanate and at least one OH-containing material; and 2) an amine-containing curing agent, wherein the equivalent ratio of the amine-containing curing agent of 2) to the polyurethane prepolymer of 1) is from 0.75 to 0.98; b) a hydroxyphenylbenzotriazole present in the polyureaurethane composition in an amount from 0.75 to 1.1 percent, based on the total weight of resin solids in the polyureaurethane composition; and c) a multifunctional hindered phenol type anti-oxidant present in an amount from 0.25 to 1.5 percent, based on the total weight of resin solids in the polyureaurethane composition wherein b) and c) are combined in amounts to provide the polyureaurethane composition with a Δ Yellowness Index of less than 1.85 in the 60/80 Accelerated Warehouse Aging Test.
摘要:
The present invention provides polyurethane composition including: (a) at least one polyurethane including a reaction product of components comprising: (i) at least one polyisocyanate; (ii) at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and (iii) at least one diol having 2 to 18 carbon atoms; and (b) at least one reinforcement material selected from the group consisting of polymeric inorganic materials, nonpolymeric inorganic materials, polymeric organic materials, nonpolymeric organic materials, composites thereof, and combinations thereof; coatings and articles made therefrom and methods of making the same.
摘要:
The present invention relates to a sulfur-containing polyureaurethane and a method of preparing the polyureaurethane. The sulfur-containing polyureaurethane has a refractive index of at least 1.57, an Abbe number of at least 32 and a density of less than 1.3 grams/cm3 when cured. The sulfur-containing polyureaurethane is prepared by the reaction of: (a) a sulfur-containing, isocyanate functional polyurethane prepolymer derived from: (i) a polyisocyanate; and (ii) a polythiol oligomer produced by the reaction of at least two or more different dienes with one or more dithiols and in certain embodiments at least one trifunctional or higher-functional polythiol; and (b) an amine-containing curing agent.