Abstract: This invention relates to an inorganic colorant, to a paste made from that colorant by dispersing that colorant into a vehicle, and to a water based paint made using either these colorants or pastes. This invention involves an improvement of the dispersibility of the inorganic colorant into a dispersion medium by which that inorganic colorant, having polar groups on its surface, is treated by low temperature plasma polymerization of a substantially non-polar monomer to form a non-polar group on the surface of the inorganic colorant. The inorganic colorants, to which this invention is applied to improve their dispersibility, are of a wide variety of species. According to the invention, due to the great improvement in the dispersibility of the inorganic colorants, the possible range of formulation of inorganic colorant and the dispersion medium is enlarged.
Abstract: This invention concerns new molecules with active, non-linear optical properties and which can be thermally reticulated (more precisely, these molecules include terminal functions which can be reticulated, attached to either side of the groups active in non-linear optics, which can be oriented under an electrical field). When reticulated and oriented under an electrical field, these materials are particularly stable and can be employed for industrial applications, using non-linear optics (electrooptical modulators, frequency doublers, etc.).
Type:
Grant
Filed:
June 12, 1992
Date of Patent:
March 15, 1994
Assignee:
Thompson-CSF
Inventors:
Pierre Le Barny, Evelyne Chastaing, Jean-Claude Dubois, Sophie Muller, Francoise Soyer
Abstract: The present invention relates to nonlinear optical materials comprising aminoaryl hydrazones and to nonlinear optical polymeric compositions containing recurring covalently bonded moieties derived from the aminoaryl hydrazones of the invention. The polymeric compositions of the present invention have high glass transition temperatures and exhibit stable nonlinear optical activity at high temperatures over a period of time.
Type:
Grant
Filed:
August 10, 1992
Date of Patent:
February 22, 1994
Assignee:
The Dow Chemical Company
Inventors:
Muthiah N. Inbasekaran, Mark D. Newsham, Michael N. Mang
Abstract: A method of producing insulating layers over a semiconductor substrate comprising spinning a film of spin-on-glass (SOG) over a semiconductor substrate, precuring the film of SOG at an elevated temperature sufficient to remove the bulk of solvent and curing the film of SOG in a plasma in a plasma reactor of a type exhibiting a self-biased R.sub.F discharge adjacent the SOG for a period of time sufficient to exclude the bulk of SiOH, organic volatiles and H.sub.2 O from the layer.
Abstract: Archival materials including paper manuscripts are preserved by a thin protective polymer film applied to the surface of the item by plasma polymerization of an organic monomer gas in a high frequency glow discharge. The polymer film protects the item against humidity and prevents widening of stroke lines due to ink spreading on the document. Microorganism growth is stopped by pretreatment of the document in a monoatomic gas plasma.
Type:
Grant
Filed:
April 6, 1992
Date of Patent:
November 16, 1993
Assignee:
Plasma Plus
Inventors:
Svetlana A. Krapivina, Georgy Z. Paskalov, Alexander K. Filippov
Abstract: A method for plasma treatment of a predetermined portion of a substrate. The impedance of the coil and an established normal plasma is matched with the impedance of a power source, thereby maximizing the efficiency of the transfer of energy from the power source to the coil and producing a resonant plasma. The predetermined portion of the substrate is exposed to the resonant plasma for treatment. Additionally, a method for plasma treatment of a predetermined portion of the outside surface of a filament. The filament is trained through an inlet and exit of a plasma treatment chamber, through an inlet side tubular mask within the chamber, and through an exit side tubular mask within the chamber, each mask being adjustable within the chamber axially of the filament to expose a predetermined segment of the filament to plasma in the chamber while masking the remainder of the filament within the chamber from exposure to plasma.
Abstract: Herein provided are a polypropylene resin composition which comprises (A) a polypropylene, (B) an ethylene-propylene-diene terpolymeric rubber having a Mooney viscosity, ML.sub.1+4 (100.degree. C.
Abstract: The invention relates to a process for the coating of electrically conducting substrates in which(1) the substrate is immersed in an aqueous electrocoating paint comprising at least one cathodically depositable resin,(2) the substrate is connected as cathode,(3) a film is deposited on the substrate using direct current,(4) the substrate is removed from the electrocoating paint and(5) the deposited paint film is baked.In this invention an electrically conducting substrate coated by a coating produced by plasma polymerization is employed as substrate.
Type:
Grant
Filed:
November 7, 1991
Date of Patent:
August 17, 1993
Assignee:
BASF Lacke + Farben Aktiengesellschaft
Inventors:
Jan Berg, Rainer Burstinghaus, Hans-Joachim Streitberger, Jurgen Hambrecht
Abstract: The present invention includes methods for treating particles with plasma activated species. Through the use of the present invention, particles can be functionalized, coated or grafted.
Abstract: In a plasma-enhanced chemical vapor deposition method, in order to achieve greater space for positioning workpieces to be coated simultaneously and essentially identically on all sides, the workpiece are positioned at a distance from one electrode on the basis of a coating rate gradient.
Abstract: A method is disclosed for the deposition of plasma films in which the optical index of refraction of the deposited film can be varied continuously or discontinuously as the material is deposited. The change in refractive index is accomplished by changing the input power applied to the plasma chamber. The method can be used to create optical wave guides from material of a single input monomer vapor.
Abstract: Method of chromatographically separating a mixture by contacting said mixture under chromatographic separation conditions with a chromatographic separation stationary phase comprising a polymer formed by coating substantially all of the surfaces of a microporous, comminuted substrate material with a monomer that is subsequently polymerized in situ with a cold-gas plasma discharge.
Abstract: This invention relates to the use of low temperature plasma technology for significantly improved corrosion protection of metals. The plasma process involves pretreatment of the surface of the metal with a gas plasma comprising argon, hydrogen, or mixtures thereof, followed by plasma deposition of a thin polymeric film on the treated surface, followed by cathodic electrocoat application of a primer.
Type:
Grant
Filed:
November 12, 1991
Date of Patent:
January 26, 1993
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Joseph A. Antonelli, Tyau-Jeen Lin, Duck J. Yang, Hirotsugu Yasuda