Diverse substituents R can be attached to the Si centers. The silsesquioxane core in these hybrid materials provides an increased glass transition temperatureimproved mechanical properties, higher use temperature, and lower flammability.
Example 9 A mixture of the product from example 7 3. In any composition comprising the present fluorescent colorants, one would naturally expect to find other commonly encountered components including stabilizers, for example antioxidants, UV absorbers, hindered amine or other light stabilizers, phosphites or phosphonites, benzofuranones, thiosynergists, polyamide stabilizers, metal stearates; also other fluorescent materials, processing aids, solvents etc.
Ar1 and Ar2 can be unsubstituted or substituted by, for example, C1-C12alkyl; C1-C12alkoxy; halogen, like fluorine, chlorine or bromine; cyano; amino; N-mono- or N,N-di- C1-C12alkyl amino; phenylamino, N,N-di-phenylamino, naphthylamino or N,N-di-naphthylamino, wherein the phenyl or naphthyl radicals can be further substituted by, for example, C1-C12alkyl, C1-C12alkoxy or halogen.
In the present disclosure: These polymers may be in the form of, for example, molded articles, extruded workpieces, films, sheets, etc, as well as part of paint systems, powder coating compositions, printing inks and other coating materials. It is anticipated that an even smaller amount of the silsesquioxane groups will contain R groups such that dimeric or oligomeric silsesquioxane groups will be formed.
In such an embodiment Y is derived, for example from a xanthene, perylene, benzoxanthene, naphthalimid, diketopyrrolopyrrole, quinacridone or phthalocyanine pigment, and in a particular embodiment, Y is derived from a perylene, benzoxanthene, naphthalimid or diketopyrrolopyrrole pigment.
Save A cubic silsesquioxane. Example 13 The procedure for Example 10 is repeated except 4-chloro-naphthalic anhydride 7. Typically Ar1 and Ar2 are phenyl; naphthyl, like 1- or 2-naphthyl; biphenyl, like 3- or 4-biphenyl; phenanthryl, like 9-phenanthryl; or flurorenyl, like 2- or 9-fluorenyl, for example Ar1 and Ar2 are phenyl or naphthyl, typically phenyl.
The silsequioxane group of the formula I is an example of a nanoparticle. Standard incorporation techniques are employed, for example, incorporating the novel colorants into the substrates using roll mills, mixing or milling apparatus. Polymeric silsesquioxanes Polymeric silsesquioxanes have been reported, first by Brown.
The resin matrix is then broken to a specific size, typically of several microns, so that it may be used as a pigment. Poly phenylsilsesquioxane does not adopt a cage structure, but is a polymer with a ladder-like repeating unit.
Discs C1 and C2 exhibit a diminished fluorescence at about nm, disc D exhibits a stronger fluorescence, relative to discs C1 and C2, at about nm. All dried samples exhibit fluorescence. The fluorescent colorants of the present invention are either soluble or readily and evenly dispersed in a wide variety of solvents and polymers providing evenly colored systems which retain their color under aging or weathering conditions longer than commonly encountered dyes.
A silicone-based paint combined with QAS-functinalized silsesquioxanes could be used to paint medical and sanitary devices, biomedical devices, exam equipment, medical storage rooms, hospital rooms, clinics, doctor offices, etc. The alkyl halides used were 1-iodooctadecane, 1-bromohexadecane, and 1-chloroctadecane.
For example, fluorescent colorants of the present invention are used to color high molecular weight organic compounds which may be in the form plastic materials, melts or of spinning solutions, paint systems, coating materials or printing inks.
The colorants are strongly fluorescing and long lasting and are useful in a wide variety of applications including printing inks, coatings and the coloration of plastics. The discs are rotated around the lamp for hours and then removed.
Color measurements of the dried samples are recorded. May 01, · Sample records for ladder logic diagrams (GIG) and capabilities and potential breakthroughs. The GIG is comprised of 7 million devices spread across 15, networks that are attacked “hundreds of.
The we find that the effective field theory describing the system is a self-dual sine-Gordon model, which favors ordering and the. Polyhedral oligomeric silsesquioxane (POSS) is a silicon and oxygen cage-like structure surrounded by organic groups.
POSS-diamine and the monomers of Kapton® were polymerized and cured to form. Polyhedral oligomeric silsesquioxane (POSS) with a distinctive nanocage structure consisting of an inner inorganic framework of silicon and oxygen atoms, and an outer shell of organic functional groups is one of the most.
SILICON-CONTAINING POLYMERS AND COMPOSITES OMNI HOTEL, SAN DIEGO, CALIFORNIA USA * DECEMBERSILICON-CONTAINING POLYMERS AND COMPOSITES OMNI HOTEL, SAN DIEGO, CALIFORNIA USA * DECEMBERLecture Polyhedral Oligomeric Silsesquioxane (Fluoro-POSS) and a Fluoroelastomer.
Effects of a nanometer-size, reactive polyhedral oligomeric silsesquioxane (POSS) on a thermoset‘s polymerization kinetics and dielectric relaxation have been investigated by using differential scanning calorimetry (DSC) and dielectric.
Fluorinated Polyhedral Oligomeric Silsesquioxanes (F-POSS) [Scott T. Iacono] on schmidt-grafikdesign.com *FREE* shipping on qualifying schmidt-grafikdesign.com: Scott T.
Iacono.7 write about self-dual polyhedral oligomeric silsesquioxane