Monsanto Company

Akzo N.v.

Gary L Deets

Quirino A Trementozzi

Peter Shapras

William G Tamalis

Robert L Kruse

Speros P Nemphos

Richard M Zielinski

Quiriano A Trementozzi

Yoon C Lee, Deceased

A toner composition for use in electrophotography comprises a rosin modified styrene-acrylic binder resin which has been prepared by steam stripping a mixture solution polymerized styrene acrylic copolymer resin, rosin and a suitable solvent such a toluene or xylene followed by cooling and grinding to form styrene acrylic/rosin binder resin. This binder resin is then formulated with conventional coloring pigments, charge controlling dyes and carriers such as iron powder or glass beads to provide dry toner compositions of high positive charge. An important feature of the present invention is that the styrene acrylic/rosin binder resin will have an inherent positive charge of at least 2.0. This inherent positive charge is in contrast to typical prior art toner binders which are inherently negatively charged. As a result, the toner composition of this invention needs much less of addition of charge control agent to bring the positive charge to the required +10 to +12; thereby leading to far lower manufacturing costs.

Toner composition comprising rosin modified styrene acrylic resin

Cationic starch graft copolymers are disclosed which improve the dry strength of paper when used as wet-end additives. Such copolymers comprise cationic starch, nonionic vinyl monomers and cationic vinyl monomers which have been polymerized.

Cationic grafted starch copolymers as high-strength paper additives

Cationic grafted starch copolymers

Polyblends comprising about 10 to about 90% by weight of polyphenylene oxide and about 90 to about 10% of SAN or ABS polymer comprising 8 to 17 average % by weight acrylonitrile in which the acrylonitrile compositional distribution in the SAN or ABS polymer is broad in that the standard deviation of the weight % AN about the mean value is at least about 3.5%.

Polyblends of polyphenylene oxide and styrene-acrylonitrile polymers

Polyblends are described which comprise (i) 40 to 60% by weight of polyphenylene oxide; (ii) from 10 to 30% by weight an SAN or ABS polymer comprising from 2 to 14% by weight of acrylonitrile; and (iii) from 10 to 30% by weight of a styrene/maleic anhydride copolymer containing from 5 to 18% by weight of maleic anhydride; and in which: (a) the weight proportion of rubber (ungrafted basis) in the polyblend is less than 8%; and (b) the proportions of acrylonitrile and maleic anhydride are selected such that, when plasticized only with 4 parts of triphenyl phosphate for each 100 parts by weight of polyphenylene oxide, the Izod impact strength is at least 50 J/M notch and the distortion temperature under load is at least 110.degree. C.

Polyblends

Polyblends of N-phenyl maleimide copolymers and SAN copolymers within certain imide and acrylonitrile content ranges are found to have unique compatibility properties not displayed by related copolymer blends.

Polyblends comprising N-phenylmaleimide copolymers and SAN copolymers

Polymer compositions comprising a nitrogenous polymer, especially an acrylonitrile-containing polymer evolve reduced amounts of hydrogen cyanide on combustion when containing an alkaline earth metal oxide and a polysulfide rubber.

Nitrogenous polymer composition emitting reduced amounts of hydrogen

Polymer compositions comprising a nitrogenous polymer, especially an acrylonitrile-containing polymer, and a halogen-containing flame retardant evolve reduced amounts of hydrogen cyanide on combustion when containing an alkaline earth metal oxide and sulfur.

Nitrogenous polymer compositions

Polymer compositions comprising a nitrogenous polymer, especially an acrylonitrile-containing polymer evolve reduced amounts of hydrogen cyanide on combustion when containing an alkali metal carbonate and cupric oxide.

Polymer compositions evolve reduced amounts of noxious gases on combustion when containing an organometallic complex of a metal having an atomic number from 24 to 30.

Polymer compositions evolving reduced amounts of noxious gases on

Polymer compositions comprising a nitrogenous polymer, especially an acrylonitrile-containing polymer, evolve reduced amounts of hydrogen cyanide on combustion when containing an alkaline earth metal oxide and sulfur.

Disclosed herein are polyblend molding compositions which comprise (A) poly(styrene/acrylonitrile/methylmethacrylate) matrix polymer; (B) polychloroprene rubber which is grafted with monomers of the type used to prepare the matrix; (C) a metal oxide; and (D) smoke suppressants. Specimens molded from these polyblends have a UL-94 rating of at least V-1 and a smoke level of less than 360 D.sub.m Flaming as measured using the NBS smoke test.

Flame retardant styrenic molding compositions

Disclosed herein are polyblend molding compositions which comprise (A) a polymethylmethacrylate matrix polymer; (B) polychloroprene rubber which is grafted with methylmethacrylate; and (C) a metal oxide. Specimens molded from these polyblends have a UL-94 rating of at least V-1 and a smoke level of less than 300 D.sub.m Flaming using the NBS smoke test.

Polymethylmethacrylate based molding compositions

This invention relates to a polyblend composition and a method for preparing same, said composition comprising a copolymer of a monovinylidene aromatic monomer such as styrene and an unsaturated nitrile monomer such as acrylonitrile blended with a grafted chloroprene rubber, a grafted polybutadiene rubber and a metal oxide.

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Springfield, MA, United States of America

Gary L Deets