Abstract:
A method of producing novel soluble, substantially amorphous phenylene sulfide polymers employing at least one m-dihalobenzene and at least one p-dihalobenzene. Polymer products are defined.
Abstract:
PROCESS FOR EMULSION POLYMERIZATION OF VINYL FLUORIDE IN WHICH AN OXIDANT AND A REDUCTANT ARE EMPLOYED BUT THE OXIDANT, IS INTRODUCED AFTER THE DESIRED POLYMERIZATION TEMPERATURE AND PRESSURES ARE ATTAINED.
Abstract:
A method of producing arylene sulfide polymers employing (1) polyhalosubstituted aromatic compounds; (2) thioamides; (3) bases selected from the hydroxides of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium and barium and the carbonates of sodium, potassium, rubidium and cesium; and, (4) organic amides.
Abstract:
TETRAFLUOROETHYLENE IS POLYMERIZED IN THE PRESENCE OF AT LEAST ONE DI(SATURATED HYDROCARBYL) PEROZYDICARBONATE WHEREIN THE SATURATED HYDROCARBYL RADICALS HAVE FROM 1 TO 4 CARBON ATOMS.
Abstract:
A method of producing arylene sulfide polymers employing polyhalo-substituted aromatic compounds, phosphorus pentasulfide, bases selected from the hydroxides of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium and barium and the carbonates of sodium, potassium, rubidium and cesium and phosphoramides such as hexamethylphosphoramide.
Abstract:
Poly(vinylfluoride) is heat stabilized by addition thereto of a poly(vinylpyridine), e.g., poly(4-vinylpyridine) poly(2-methyl-5vinylpyridine). From about 0.5 to 20 weight percent, now preferably 1 to 3 percent, approximately of the stabilizer is added to the poly(vinylfluoride) to protect it against thermal decomposition. Though poly(vinylfluoride) homopolymer decomposes rapidly in about 1 to 7 minutes at 260* C. and cannot be molded without use of a latent solvent, with the poly(vinylpyridine), decomposition does not occur at this temperature over a 30-minute period. This allows the polymer to be molded.
Abstract:
A method of producing arylene sulfide polymers employing (1) polyhalosubstituted aromatic compounds; (2) after-defined sources of sulfur; and (3) alkali metal aminoalkanoates.
Abstract:
A method of producing arylene sulfide polymers employing (1) polyhalo-substituted aromatic compounds; (2) thiosulfates selected from lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium and barium thiosulfates; (3) bases selected from the hydroxides of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium and barium and the carbonates of sodium, potassium, rubidium and cesium; and, (4) organic amides.