摘要:
Provided is a composition comprising an aromatic material selected from a polythiol aromatic compound or resin, a hydroxythiophenol compound or resin, a catechol novolak resin, a catechol cresol novolak resin, a polyhydroxy aromatic resin or compound comprising at least one aromatic ring having at least one hydroxyl group attached directly to the aromatic ring wherein at least one hydroxyl group is a phenolate salt, or a combination thereof, and a salt former compound capable of forming a salt with the aromatic material, a fluoropolymer, and optionally a phase transfer catalyst. Also provided are articles comprising powder-coated fluoropolymers with aromatic compounds, and methods for making the compositions and articles.
摘要:
Apparatus in the form of a wedge made of foam having a density capable of maintaining a user's spine extended during use is employed during abdominal exercise to prevent posterior pelvic tilt (PPT) during the exercise and thereby promote elastic remodeling of the spinal ligament.
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:
Low viscosity, radiation curable urethane oligomer, preferably a radiation curable polyester urethane oligomer, that can be incorporated into radiation curable ink compositions. Preferred embodiments are suitable for ink jetting applications. The ink jettable embodiments are particularly well-suited for use in piezo ink jet printers. The viscosity characteristics of the compositions are such that conventional solvent is not required in order to satisfy the requisite low ink jet viscosity specifications. The oligomer generally is a reaction product of ingredients comprising an aliphatic polyisocyanate; and a radiation curable, polyester alcohol comprising one or more radiation curable moieties, one or more hydroxyl moieties, and one or more ester moieties.
摘要:
Described are pigmented inks comprising a liquid medium, a pigment, and a polyurethane dispersant, the pigment being stabilized by the polyurethane dispersant, and the ink being suitable for use in an ink jet printer.
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 relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an S0.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment B pendant from the polyurethane backbone.
摘要:
The invention relates to a sulfonated, thiol, and hydroxy-functional polyurethane polymer which comprises: (i) a polyurethane backbone; (ii) at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an SO.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; (iii) at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and (iv) at least one --SD group pendant from the polyurethane backbone. The invention also relates to vinyl/polyurethane copolymers made therewith which are particularly useful as binders in magnetic recording media and a method of making the copolymers. The invention also relates to certain nonsulfonated thiol and hydroxy functional polyurethane graft copolymers and dispersions made therewith.