摘要:
A method for preparing encapsulated red phosphorus is disclosed. The method entails obtaining a material system that contains dispersed particulate red phosphorus having a mean particle size of 0.1 to 100 nullm in an aqueous phase that comprise urea, formaldehyde and a water-soluble silicon dioxide precursor, adding to the material system a sufficient amount of acid to lower the pH to 0 to 5 and maintaining the resulting acidic system at a temperature of 80 to 120null C. for a period longer than one hour. The encapsulated red phosphorus of the invention is suitable for using as a flame retarding agent for plastics molding compositions.
摘要:
The present invention is directed to the formation of a solid, dispersible flame retardant powder, by depositing solid flame retardant particles, via electrostatic and packing interactions, onto emulsified droplets of a melted wax, melted polymer, or organic solid carrier, or onto droplets of an organic liquid carrier. Additionally, the invention is directed to the use of such particles as flame retardants in a thermoplastic or the thermosetting polymer composition and coatings.
摘要:
A conductive filler in the form of non-conductive particles coated with plural layers of metal plating is provided wherein the lower layer is of copper or copper alloy plating, and the uppermost layer is of gold plating. The conductive powder has a high conductivity, improved durability, especially oxidation resistance, and a relatively low specific gravity.
摘要:
A powder-based coating composition for coating a substrate, having a first color effect, with a film layer is disclosed. Application of the film layer to the substrate produces a second color effect different from the first color effect. The composition includes a powder-based binder and a color effect-providing pigment. The powder-based binder is the reaction product of a resin, having a functional group, and a cross-linking agent reactive with the functional group. The color effect-providing pigment includes a pigment substrate and an inorganic coating. The pigment substrate has first and second substantially parallel and planar surfaces, and the inorganic coating is disposed on the first and second surfaces. The inorganic coating has an index of refraction of 1.8 or less. To produce the second color effect, the inorganic coating and the pigment substrate of the color effect-providing pigment interact with the first color effect of the substrate upon application of the film layer to the substrate.
摘要:
A vibration damping silicone composition with excellent long term storage stability and vibration damping ability contains as components (A) a silicone oil, (B) hollow particles of an organic resin having an inorganic material powder supported on its surfaces, and (C) a solid inorganic material powder.
摘要:
The invention relates to a laminate consisting of a multilayer transparent film and a multilayer opaque film, which has an intermediate layer. The base layer of the transparent film contains a pigment, which absorbs illuminati n in the wavelength range f a laser. The laminate can be marked and inscribed using a laser.
摘要:
A method for microencapsulating red phosphorus in polymerized urea resorcinol formaldehyde resin is disclosed. The method entails (i) preparing an aqueous mixture containing urea, resorcinol and formaldehyde, (ii) adding hexamethylene tetramine and optionally water to the mixture to yield a stabilized mixture (iii) dispersing red phosphorus in the to the stabilized mixture (iv) adding acid to the reaction mixture, and (v) collecting the resulting encapsulated red phosphorus. The product is suitable as flame retarding agent in molding compositions.
摘要:
The invention relates to a plastic part having lustrous pigments and filler particles. Moldings of this plastic part exhibit a pronounced glitter effect.