摘要:
Cellulose-containing pastes which may be diluted in low-solvent, high-solids aqueous cellulose lacquer dispersions and which contain certain anion-active emulsifiers.
摘要:
A magnetic recording medium comprising a nonmagnetic support and a magnetic layer provided thereon is disclosed. The magnetic layer comprises a magnetic recording element and a binder, wherein the magnetic recording element mainly comprises acicular gamma-Fe.sub.2 O.sub.3 particles having an average porosity of not more than 5% by volume, a specific surface area of 24 to 30 m.sup.2 /g and the X-ray diffraction intensity at the face (210) to that at the face (311) of not more than 5%. The magnetic recording medium has improved electromagnetic conversion characteristics such as sensitivity and noise.
摘要:
A polyester composition in organic solvents with about 40% polyester, 26% melamine crosslinker and 16% cellulose acetate butyrate provides a coating composition with 18% binder solids.
摘要:
A process for producing a mechanically stable, heat resistant lacquer for record carriers on a cellulose monobutyrate basis, whereby the cellulose aceto monobutyrate and a polyvinyl ester copolymer with long aliphatic side chains are mixed with each other and are processed in the form of a lacquer after addition of the fillers and/or pigments.
摘要:
A multilayer coating is produced by applying to a substrate as a base-coat composition a pigmented solution in a volatile organic liquid of a film-forming polymer, the solution also containing specified polymer microparticles, forming a polymer film from the base-coat composition, then applying to the film so obtained a transparent top-coat composition and finally forming a second polymer film upon the base-coat film.
摘要:
Aqueous dispersion of a binder for coating compositions comprising 5-35% by weight of nitrocellulose, 0-30% by weight, based on (a) of plasticizer, 5-50% by weight of alkyd resin, 30-80% by weight of water, 0.5-10% by weight of emulsifier, and optionally 4-40% by weight of a urea resin and/or melamine resin.
摘要:
A new film forming and drying composition of matter has been prepared comprising an emulsion containing thermoplastic polymeric resin, a solvent for said resin, an emulsifying agent and microdroplets of water containing TiO2 pigment particles, said composition capable of forming microvoids of air upon drying. In the dried film the TiO2 pigment particles are present in the microvoids in an amount of from 0.4% to 15% by volume of the total volume of the microvoids. The microvoids have a diameter of from 01. Mu to 1.0 Mu and a total microvoid volume of from 55% to 75% of the total volume of the dried film.
摘要:
A NEW FILM FORMING AND DRYING COMPOSITION OF MATTER HAS BEEN PREPARED COMPRISING AN EMULSION CONTAINING THERMOPLASTIC POLYMERIC RESIN, A SOLVENT FOR SAID RESIN, AN EMULSIFYING AGENT AND MICRODROPLETS OF WATER CONTAINING TIO2 PIGMENT PARTICLES, SAID COMPOSITION CAPABLE OF FORMING MICROVOIDS OF AIR UPON DRYING. IN THE DRIED FILM THE TIO2 PIGMENT PARTICLES ARE PRESENT IN THE MICROVOIDS IN AN AMOUNT OF FROM 0.4% TO 15% BY VOLUME OF THE TOTAL VOLUME OF THE MICROVOIDS. THE MICROVOIDS HAVE A DIAMETER OF FROM 0.1U TO 1.0U AND A TOTAL MICROVOID VOLUUME OF FROM 55% TO 75% OF THE TOTAL VOLUME OF THE DRIED FILM.