摘要:
The present invention relates to novolac vinyl esters useful as thermal resistance conferring components for anaerobic curable compositions, and anaerobic curable compositions having such novolac vinyl esters. The compositions are particularly useful as adhesives and sealants.
摘要:
The present invention relates to a method for the generation of thermoset-thermoplastic hybrid nanoparticles with a hard phase and a soft phase, wherein the hard phase comprises or consists of a thermosetting polymer and the soft phase comprises or consists of a thermoplastic polymer, the method including a) providing a mixture of a thermosetting resin, monomers of a thermoplastic polymer, and a curing agent for the thermosetting resin; b) dispersing the mixture into an aqueous medium to form a miniemulsion, c) polymerizing the thermosetting resin in the miniemulsion by stepwise polymerization to form a seed emulsion of thermoplastic monomer swollen thermosetting polymer nanoparticles; d) adding monomers of the thermoplastic polymer to the seed emulsion; and e) adding a polymerization initiator and polymerizing the monomers of the thermoplastic polymer by free radical polymerization to form the core-shell nanoparticle. Also encompassed are the thus produced thermoset-thermoplastic hybrid nanoparticles and their use in thin films for the application in coatings and adhesives.
摘要:
L'invention concerne une composition polymérisable d'autoréparation micro-encapsulée, formée par au moins un composé polymérisable sélectionné, à intégrer dans des matériaux organiques, inorganiques ou composites pour auto-réparer les dégradations subies dans leur environnement d'exploitation, qui se caractérise en ce que ladite composition polymérisable micro-encapsulée est intégrée, seule, aux dits matériaux puis une fois libérée des microcapsules et en l'absence de catalyseur, polymérise spontanément en présence d'un agent de déclenchement de la polymérisation externe aux dits matériaux mais naturellement présents dans leur environnement d'exploitation en réparant lesdites dégradations.
摘要:
A radiation diffraction material comprising an ordered periodic array of particles held in a polymeric matrix is disclosed; the particles each comprise a core surrounded by a shell of a non-film forming composition that is different from the matrix. Methods for using the material are also disclosed.
摘要:
A resin composition for optical three-dimensional molded objects which absorbs little water or moisture even in long-term storage and retains high curing sensitivity over long and from which a three-dimensional molded object excellent in molding accuracy, dimensional accuracy, water resistance, moisture resistance, and mechanical properties can be produced in a reduced molding time with satisfactory productivity. The resin composition for optical three-dimensional molded objects comprises one or more epoxy compounds (A), an ethylenic compound (B), a cationic polymerization initiator (C), a free-radical polymerization initiator (D), and oxetane compounds (E), wherein the epoxy compounds (A) comprise 20-100 mass% alicyclic diglycidyl ether compound represented by the following formula (I): (I) (wherein R 1 is a residue of hydrogenated bisphenol A, residue of hydrogenated bisphenol F, residue of hydrogenated bisphenol Z, cyclohexanedimethanol residue, or tricyclodecanedimethanol residue) and the oxetane compounds (E) comprise a monomeric oxetane compound and a polyoxetane compound in a ratio of from95:5 to 5:95 by mass.
摘要:
Coating compositions, and methods for depositing them on the surface of an article to produce an antireflection coating, are disclosed. In one embodiment, the coating composition includes a (meth)acrylate-functional silicon alkoxide, silica particles, a (meth)acrylate monomer, an epoxy (meth)acrylate oligomer, a photoinitiator, a solvent, an acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index less than about 1.60 at a wavelength of 510 nm. In another embodiment, the coating composition includes an organo-metallic compound other than an organo-metallic compound of silicon, an epoxy-functional silicon alkoxide, a non-epoxy-functional silicon alkoxide, a curing agent compatible with epoxy-functional molecules, a solvent, an inorganic acid, and water. The relative amounts of these constituents are controlled such that, when the coating composition is deposited onto the surface of an article and cured, it has a refractive index greater than about 1.70 at a wavelength of 510 nm. The coating compositions are deposited in a process that produces an antireflection coating in less than 90 minutes of processing time.