Abstract: A process for preparing a particulate vinyl polymer resin and vinyl polymer resin derived therefrom wherein, comprising polymerization in the presence of a dispersant or graft dispersant having no ionic side groups, optionally containing terminal functional groups, said dispersant is derived from repeating units of .alpha.,.beta.-unsaturated ester(s) of acrylic and/or methacrylic acid and having a molecular weight average of from about 500 to about 50,000.

Abstract: A laser radiation detection system using a spatial/wavelength filter to "ulate" the response of a detector as a function of wavelength, allowing discrimination of laser sources against broad spectral sources, as well as wavelength determination.

Abstract: A process for preparing a particulate vinyl polymer resin and vinyl polymer resin derived therefrom wherein, comprising polymerization in the presence of a dispersant or graft dispersant having no ionic side groups, optionally containing terminal functional groups, said dispersant is derived from repeating units of .alpha.,.beta.-unsaturated ester(s) of acrylic and/or methacrylic acid and having a molecular weight average of from about 500 to about 50,000.

Abstract: A method of preventing or retarding polymer build-up on the internal surfaces of polymerization reactors is provided by this invention. Reduced build-up in vinyl chloride polymerization is obtained by having a phenolic compound coated on the internal surfaces of the reactor vessel and a water phase polymerization inhibitor either combined with the phenolic coating or added to the aqueous polymerization medium. Optionally, a chelating agent is also added with the water phase inhibitor. The process is further enhanced by the presence of water soluble dispersants such as polyvinyl alcohol and methyl cellulose.

Abstract: A method of preventing or retarding polymer build-up on the internal surfaces of polymerization reactors is provided by this invention. Reduced build-up in vinyl chloride polymerization is obtained by having a phenolic compound coated on the internal surfaces of the reactor vessel and a water phase polymerization inhibitor either combined with the phenolic coating or added to the aqueous polymerization medium. Optionally, a chelating agent is also added with the water phase inhibitor. The process is further enhanced by the presence of water soluble dispersants such as polyvinyl alcohol and methyl cellulose.

Abstract: This invention relates to the use of an organic compound which is a polymerization inhibitor in aqueous suspension polymerization systems for making polymers from olefinic monomers. The inhibitor is added to the aqueous medium prior to the start of or during the reaction. Its use allows a wide range of control throughout the increased reaction rate region and substantially reduces the tailpeak encountered during the aqueous suspension polymerization of olefinic monomers. One example of a suitable inhibitor is 2,2'- methylene bis (4,6-di-tertiary butylphenol).

Abstract: The invention covered relates to an improved, solvent-free process for the continuous manufacture of peroxydicarbonate polymerization catalysts. The improvement in the process is the mere decanting of the reaction product through a filtering medium into a separation zone, decanting to a washing zone, decanting to a second separation zone and then taking the product up in an aqueous medium containing a suitable emulsifying agent whereby the resultant initiator or catalyst emulsion can be conveniently and safely stored until ready for use in a polymerization reaction.

Abstract: A frequency agile optical radar system including a frequency agile laser rce coupled with an extra-cavity dispersive element in such a manner as to radiate into space specific optical frequencies correlated with specific elevation angles measured from the horizontal. Laser radiation reflected from an object in space is detected by a staring detector system and the wavelength of the reflected optical energy determined therefrom. The elevation angle of the object in space is correlated with the optical frequency determination and coupled together with target range and aximuth angle so that the position and range to an object in space may be determined.

Abstract: A system for warning a target designator operator whenever a target less n a predetermined distance from the operator is designated. Actuating the target designator triggers a time interval counter and circuitry to detect reflected pulses. An indicator will warn the operator if a pulse is reflected to the system from an object less than a predetermined distance from the operator.

Abstract: Two dimensional optical or electrical images are processed through a storage tube designed to yield the correlation function between the input images and stored images. By generating a series of stored images representing sine and cosine components of the Fourier transform, a fast, two-dimensional transform of the image is obtained.

Abstract: Direct spatial Fourier power spectra of optical images are obtained by maulating either the image focused onto a photosensitive charge coupled device (CCD) or the readout from the CCD.