Abstract:
ALKENYL SULFAMATES HAVING 10 TO 22 CARBON ATOMS, SUCH AS ERUCYL SULFAMATE AND OLEYL SULFAMATE, ARE PREPARED BY REFLUXING THE CORRESPONDING ALKENOL WITH SULFAMIDE IN A SUITABLE SOLVENT, SUCH AS DIOXANE, UNTIL EVOLUTION OF AMMONIA CEASES. THESE ALKENYL SULFAMATES ARE USEFUL AS SLIP ADDITIVES IN MONO-OLEFINS POLYMERS, SUCH AS POLYETHYLENE OR POLYPROPYLENE, WHEN ADDED IN AMOUNTS FROM 0.005 TO 1 PERCENT BY WEIGHT.
Abstract:
An improvement in the fibril formation process which includes dissolving at an elevated temperature an olefin polymer having an inherent viscosity of at least 3.5 in a hot hydrocarbon solvent, shearing the hot polyolefin solution to thereby orient the polymer molecules therein, passing the sheared solution through a cooling zone maintained below the precipitation temperature of the solution while maintaining the orientation of the polymer molecules within the solution to thereby precipitate by thermal means the polymer in the form of a solvent swollen fibrous mass, separating a substantial portion of the polymer solvent from the fibrous mass, beating the fibrous mass in a liquid which is a non-solvent for the polymer and which is soluble in the polymer solvent for a time sufficient to break down the fibrous mass into a plurality of fibrils, and separating the fibrils from the nonsolvent liquid. The improvement consists of incorporating from about 5 up to about 15 weight percent based on the weight of the polyolefin of a surfactant selected from the group consisting of those nonionic surfactants having an HLB value from 7 to 12 and those anionic surfactants having an HLB value greater than 13 into the hot polyolefin/hydrocarbon solvent solution prior to the fibril formation steps of the process whereby the resultant fibrils containing the surfactant possess improved hydrophilic properties and paper sheets fabricated from these fibrils possess improved physical properties, particularly increased tensile strength.
Abstract:
UNSATURATED ALKYL SULFAMATES HAVING 10 TO 22 CARBON ATOMS, SUCH AS ERUCYL SULFAMATE AND OLEYL SULFAMATE, ARE PREPARED BY REFLUXING THE CORRESPONDING MONOUNSATURATED ALKENOL WITH SULFAMIDE IN A SUITABLE SOLVENT, SUCH AS DIOXANE, UNTIL EVOLUTION OF AMMONIA CEASES. THESE MONOUNSATURATED ALKYL SULFAMATES ARE USEFUL AS SLIP ADDITIVES IN MONI-OLEFIN POLYMERS, SUCH AS POLYETHYLENE OR POLYPROPYLENE WHEN ADDED IN AMOUNTS FROM 0.005 TO 1 PERCENT BY WEIGHT.