摘要:
The invention provides novel macromonomer and carboxyl functional polyurethanes having a high carboxyl content. The invention further provides dispersions, coatings and magnetic recording media comprising these polyurethanes, or blends or copolymers of these polyurethanes with quaternary ammonium compounds. The invention further provides novel dispersions, coatings and magnetic recording media comprising combinations of carboxyl functional polyurethanes having a high carboxyl content with quaternary ammonium polymers.
摘要:
The invention provides novel macromonomer and carboxyl functional polyurethanes having a high carboxyl content. The invention further provides dispersions, coatings and magnetic recording media comprising these polyurethanes, or blends or copolymers of these polyurethanes with quaternary ammonium compounds. The invention further provides novel dispersions, coatings and magnetic recording media comprising combinations of carboxyl functional polyurethanes having a high carboxyl content with quaternary ammonium polymers.
摘要:
Magnetic recording medium, comprising a magnetic layer provided on a nonmagnetizable substrate, wherein the magnetic layer comprises a magnetic pigment dispersed in a polymeric binder. The polymeric binder comprises a nonhalogenated vinyl copolymer, wherein the vinyl copolymer comprises a plurality of pendant nitrile groups, a plurality of pendant hydroxyl groups, and at least one pendant dispersing group. Preferably, the binder also includes a secondary polymer component.
摘要:
The invention provides novel polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise multidentate chelating functional groups pendant from the polymer backbone, which groups are produced by esterification of backbone hydroxyl moieties with cyclic dicarboxylic acid anhydrides which also bear an additional polar functional group such as those selected from the group consisting of --H, --OH, --COOM, --SO.sub.3 M, --SH, --CH.sub.2 COOM, --SCH.sub.2 COOM, --P(=O)(OM).sub.2, --OP(=O)(OM).sub.2, and the like. Examples of anhydrides useful in preparation of the polyurethanes include anhydrides of citric acid, mercaptosuccinic acid, dimercaptosuccinic acid and nitrilotriacetic acid. The polyurethanes, which are optionally radiation curable, show high affinity for magnetic pigments, and blends of the polyurethanes with vinyl resins afford excellent binders for magnetic recording media.
摘要:
The invention provides novel polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise multidentate chelating functional groups pendant from the polymer backbone, which groups are produced by esterification of backbone hydroxyl moieties with cyclic dicarboxylic acid anhydrides which also bear an additional polar functional group such as those selected from the group consisting of --H, --OH, --COOM, --SO.sub.3 M, --SH, --CH.sub.2 COOM, --SCH.sub.2 COOM, --P(.dbd.O)(OM).sub.2, --OP(.dbd.O)(OM).sub.2, and the like. Examples of anhydrides useful in preparation of the polyurethanes include anhydrides of citric acid, mercaptosuccinic acid, dimercaptosuccinic acid and nitrilotriacetic acid. The polyurethanes, which are optionally radiation curable, show high affinity for magnetic pigments, and blends of the polyurethanes with vinyl resins afford excellent binders for magnetic recording media.
摘要:
The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.-methylstyrene moieties of the formula ##STR1##
摘要:
The invention provides novel hydroxyl functional polyurethanes which can be used in magnetic media binders applications. The polyurethanes comprise strong carboxylic acid groups pendant from the polymer backbone, which groups can be produced by esterification of backbone hydroxyl moieties with cyclic dicarboxylic acid anhydrides. Examples of anhydrides useful in preparation of the polyurethanes include anhydrides of tetrachlorophthalic acid, tetrafluorophthalic acid, and dichloromaleic acid, etc. The polyurethanes, which are optionally radiation curable, show high affinity for magnetic pigments, and blends of the polyurethanes with vinyl and non-vinyl resins afford excellent binders for magnetic recording media.
摘要:
The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.-methylstyrene moieties of the formula ##STR1##
摘要:
Electronic articles such as, for example, electroluminescent lamps useful for displays and method of making the same are provided. The electronic articles include a substrate, a conductive element adjacent to the substrate, a high dielectric composite adjacent to the conductive element and an electrically-active layer adjacent to at least a portion of the high dielectric composite. The high dielectric composite includes a polymeric binder and from 1 to 80 volume percent of filler retained in the binder. The filler comprises particles that include an electrically-conducting layer and an insulating layer substantially surrounding the electrically-conducting layer. In some embodiments the binder includes a pressure-sensitive adhesive and the composite has adhesive properties.
摘要:
Electronic articles such as, for example, electroluminescent lamps useful for displays and method of making the same are provided. The electronic articles include a substrate, a conductive element adjacent to the substrate, a high dielectric composite adjacent to the conductive element and an electrically-active layer adjacent to at least a portion of the high dielectric composite. The high dielectric composite includes a polymeric binder and from 1 to 80 volume percent of filler retained in the binder. The filler comprises particles that include an electrically-conducting layer and an insulating layer substantially surrounding the electrically-conducting layer. In some embodiments the binder includes a pressure-sensitive adhesive and the composite has adhesive properties.