摘要:
A concrete additive for a reinforced concrete composite is provided. The additive can have an exfoliated clay having an exfoliated layered silicate plate comprising structure, and at least one of an oligomer or polymer linking at least a portion of said silicate plate comprising structure. The additive can have a dispersant between the silicate plates. The clay can include sodium or calcium montmorillonite or a phosphatic clay. The oligomer or polymer can include polyvinyl alcohol.
摘要:
Closed system and process for the conversion of gaseous or vaporizable organic and/or organo-metallic compound to inert solid which is resistant to solvent extraction, and is itself essentially nontoxic or convertible through oxidation or other natural processes to a toxic material. This process involves a low temperature, low energy conversion in a close system, of an organic and/or organo-metallic material by initially fragmenting such material into its basic elements follow thereafter by randomly recombining such elements as a solid coating or deposit upon a substrate. In the preferred embodiments of this invention, the toxic and/or potentially toxic material is injected as a gaseous phase into a chamber where it is subjected to an RF energy source, thereby forming a plasma which is contained within the chamber by a magnetic field. The chamber, as well as, the other components of the conversion system are maintained under a negative pressure which allows for the transport of the plasma throughout the system to a second chamber where the elements of the plasma can recombine in a random fashion. The recombination of these elements as a solid allows for ease of handling and prevents their release into the atmosphere or ground water. Compounds which can be subjected to this process include chlorinatehydrocarbons i.e., methylenechloride, carbontetrachloride and chlorofluorocarbons (i.e., Freons).
摘要:
A process for the selective conversion of a polymer coating to a ceramic material is disclosed. This process initially involves the provision of a polymer film which has been generated by R. F. plasma vapor phase polymerization of a monomer comprising an inorganic (i.e. silicon) or an organometallic constituent on a receptive substrate. The polymer is thereafter selectively exposed to a coherent or focused energy source (i.e. CO.sub.2 laser) at the appropriate wavelength and power output to effect in situ conversion of a polymer film to a ceramic deposit which is substantially devoid of carbonaceous impurities. This process is also unique for its ability to provide a ceramic deposit that is firmly adherent on a variety of receptive substrates. The degree of adherence is far superior to ceramic coatings derived by chemical vapor deposition (CVD) techniques. The process lends itself to the formation of ceramic patterns which have application in the microelectronics industry.
摘要:
A process for preparing electrostatographic toner particles having controlled particle size and size distribution is provided by forming a blend of a molten mass of polymer and a colorant, cooling and solidifying the blend in the form of a film or fiber thereof. The film or fiber is then passed through embossed or cutting rollers to enable fracture of the film or fiber into discrete particles having a size of between 1 micron and about 30 microns.