摘要:
A method for producing an optical component resin, suppressing yellowing due to addition of an ultraviolet absorber, an optical component resin, a spectacle lens, and spectacles. A method for producing an optical component resin, including a step of polymerizing a polymerizable composition containing a polythiol component, a polyisocyanate component, and an ultraviolet absorber, in which the ultraviolet absorber has a Hazen color number (APHA) of 40 or less in a toluene solution thereof having a concentration of 10% by mass, an optical component resin obtained by the producing method, an optical component formed of the optical component resin, a spectacle lens including a lens substrate formed of the optical component resin, and spectacles including the spectacle lens.
摘要:
Urethane-containing prepolymers formed from diisocyanates and adapted for Michael addition curing chemistries and compositions thereof for use in sealant applications are disclosed. The prepolymers provide compositions that exhibit room temperature stability and a controlled curing rate following a brief activation.
摘要:
The presently-disclosed subject matter includes biodegradable scaffolds. Exemplary biodegradable scaffolds comprise a plurality of polythioketal polymers, and a plurality of polyisocyanates, where at least one polyisocyanate is linked to at least one polymer to form the scaffold. Thus, certain embodiments of scaffolds comprise a cross-linked network of the polythioketal polymers and the polyisocyanates. The presently-disclosed subject matter also includes methods for treating tissue, such as skin or bone tissue, in a subject in need thereof. Treatment methods comprise contacting the tissue with an effective amount of the biodegradable scaffold. Furthermore, the presently-disclosed subject matter includes methods for making the present biodegradable scaffolds.
摘要:
“A high-molecular compound or high-molecular antioxidant obtained by reacting at least three compounds of (A) a sulfur-containing organic compound having at least two active hydrogen atoms, (B) a polyisocyanate compound having at least two isocyanate groups and (C) an amine compound having at least two active hydrogen atoms and then cationizing with an acid at least some of amino groups in a resultant reaction product” or “a high-molecular antioxidant obtained by reacting at least three compounds of (A) a sulfur-containing organic compound having at least two active hydrogen atoms, (B) a polyisocyanate compound having at least two isocyanate groups and (E) a nonionic polyol compound having at least two active hydrogen atoms” and a recording medium obtained by using the high-molecular antioxidant. The present invention provides a recording medium, which effectively prevents discoloration or color fading of images by acidic gas in the atmosphere and light and also migration of the images at high temperature and high humidity, and therefore, is suited for the long-term storage of the images.
摘要:
Plastic lenses for spectacles having a high refractive index and a high Abbe's number, and having good transparency, heat resistance, mechanical strength and impact resistance are produced. Plastic lenses for spectacles are produced through polymerization of an epithio group-having compound (a), a polythiol compound (b) and a polyisocyanate compound (c) whereby the ratio (by mol) of the polythiol compound (b) to the polyisocyanate compound (c) is at least 1.2 calculated on the basis of —SH and —NCO groups. The invention also provides a process for preparing such lenses and a catalyst for use in said process.
摘要:
The composition for optical materials of the present invention comprises a compound having in one molecule at least one structure represented by the following formula (1): wherein R1, R2, R3, R4, X, Y and n are as defined in the disclosure, an amine compound and an isocyanate compound. Resins obtained by curing the composition by polymerization are useful as well-balanced optical materials having a high impact resistance, a high refractive index and a sufficiently high Abbe's number.
摘要翻译:本发明的光学材料用组合物包含在一分子中具有下述通式(1)表示的至少一种结构的化合物:其中R 1,R 2, R 3,R 4,X,Y和n如本公开所定义,胺化合物和异氰酸酯化合物。 通过聚合固化组合物获得的树脂可用作具有高抗冲击性,高折射率和足够高的阿贝数的均衡的光学材料。
摘要:
Cold curing polyisocyanate adhesive compositions suitable for use in the preparation of engineered lumber composites. Additionally provided are catalysts comprising tertiary amine alkoxylates that are reduced in or substantially free of isocyanate-reactive hydroxylic or amine hydrogen atoms. Further provided is a process for preparing composites articles using the adhesive compositions and composite articles prepared from the adhesive compositions. Composite articles prepared from the adhesive compositions have a substantially increased resistance to delamination.
摘要:
A improved process for applying a clear coat/color coat composition to a substrate in which a color coat is applied to a substrate and then a clear coat is applied over the color coat; the improvement used therewith is a clear coating composition having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder contains about(A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer of polymerized monomers of styrene, a methacrylate monomer from the group of methyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate or any mixtures thereof, a second methacrylate monomer from the group of n-butyl methacrylate, isobutyl methacrylate or ethyl hexyl methacrylate or any mixtures thereof and a hydroxy alkyl methacrylate or acrylate each having 1-4 carbon atoms in the alkyl group, where the polymer has a number average molecular weight of about 5,000-20,000 determined by gel permeation chromatography and a calculated Tg of at least 40.degree. C. and correspondingly,(B) 20-50% by weight, based on the weight of the binder, of an organic polyisocyanate;wherein the clear coating composition on curing is in a tack free state within 3 hours after application and has a Persoz hardness of at least 30 counts.
摘要:
A polysulphide resin composition is cured by reacting a liquid polysulphide resin with an isocyanate curing agent in the presence of an organometallic or metal salt catalyst, preferably an organotin catalyst such as dibutyltin laurate (DBTL). The compositions have utility in thin films and coatings, and in the bonding, sealing and coating of polycarbonates. Aliphatic isocyanates are preferred for applications where clear coatings are required, the more reactive aromatic isocyanates being preferred for other applications.
摘要:
This invention provides synthetic routes for novel single isomers of monocarbamate diols and their polymerization to provide novel polyesters, polyurethanes, polycarbonates, and the like having pendant carbamate groups on the polymer chain. Devices using some of these novel polymers which demonstrate nonlinear optical activity are also disclosed.