Abstract: Disclosed is a polyethylene wax defined by the features (i) to (iv): (i) said polyethylene wax is an ethylene homopolymer or a copolymer of ethylene and an ?-olefin of 3 to 20 carbon atoms, (ii) a ratio (Mw/Mn) of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn), as measured by GPC, is in the range of 1.7 to 4.0, (iii) the softening point is not higher than 125° C., and (iv) the penetration hardness is not more than 15 dmm. Also disclosed are a lost wax composition for precision casting, which comprises the polyethylene wax, and a method for forming a model for precision casting, which uses the lost wax composition for precision casting.

Abstract: An olefin wax (A) is (i) a copolymer (A1) obtained by copolymerizing ethylene and at least one diene or a copolymer (A2) obtained by copolymerizing ethylene, at least one olefin selected from ?-olefins of 3 to 12 carbon atoms and at least one diene; wherein (ii) the content of unsaturated groups per one molecule is in the range of 0.5 to 3.0 groups; (iii) the density is in the range of 870 to 980 kg/m3; (iv) the melting point is in the range of 70 to 130° C.; (v) the number-average molecular weight is in the range of 400 to 5,000; and (vi) the ratio (Mw/Mn) of the weight-average molecular weight to the number-average molecular weight is not more than 4.0. A silicone-modified olefin wax can be obtained by reacting hydrogen silicone with the olefin wax (A). Cosmetics contain the silicone-modified olefin wax.

Abstract: A polyester binder resin for a toner that excels in low-temperature fixing properties, offset resistance, development durability, long-term storability, electrification properties, pulverizability, etc.; and a toner containing the same. The binder resin for a toner is comprised of a polyester resin and, dispersed therein, a wax having a substituent selected from among a substituent of aromatic structure (representative example thereof is a group derived from a styrene compound), a carboxyl group and a hydroxyl group, or comprised of a polyester resin having the above wax introduced in the structure thereof. The toner containing the above binder resin for toner exhibits excellent capability in not only, as fundamental performance of toner, low-temperature fixing properties and offset resistance but also development durability, antiblocking properties and pulverizability.

Abstract: The object of this invention is to obtain an electrophotographic toner for electrostatic developing which has excellent grindability, fixing properties, anti-offset properties, storage properties and environmental stability. The binder resin for toner of this invention is characterized by a structure in which a polyester resin and a styrene resin are connected together through an epoxy radical derived structural unit. Qwing to the usage of the binder resin for toner described above, the toner of this invention has a balance of good fixing properties and anti-offset properties and has excellent environmental stability. Another binder resin for toner of this invention is characterized by having a wax derived structure along with the above structure, and it has improved grindability and storage properties along with the above properties.

Abstract: A binder for a toner containing a polyester resin (A); and a block copolymer (B) comprising a block comprising a sequence of ethylene hydrocarbon and/or a conjugated diene hydrocarbon-derived constituent units, and a block comprising a sequence of styrene-derived constituent units; and/or the hydrogenated product of the block copolymer, i.e., the hydrogenated block copolymer. The binder can be used in a toner which can exhibit superior fixing properties, offset resistance, development durability or the like. Thus, it is possible to satisfy the needs of the markets that require a high-speed printer, low-temperature fixing properties or the like. Recycled PET products can also be used for raw materials, thus contributing to the recycle society.

Abstract: A binder resin for a toner comprises a polyester component having a specific structure which is not soluble in tetrahydrofuran, and a polyester component having a specific branched structure which is soluble in tetrahydrofuran. The binder resin can provide a toner, which is superior in low-temperature fixation and offset resistance and can be used in high speed printing in response to the recent market demands owing to its specific structure.

Abstract: A binder for a toner containing a polyester resin (A); and a block copolymer (B) comprising a block comprising a sequence of ethylene hydrocarbon and/or a conjugated diene hydrocarbon-derived constituent units, and a block comprising a sequence of styrene-derived constituent units; and/or the hydrogenated product of the block copolymer, i.e., the hydrogenated block copolymer. The binder can be used in a toner which can exhibit superior fixing properties, offset resistance, development durability or the like. Thus, it is possible to satisfy the needs of the markets that require a high-speed printer, low-temperature fixing properties or the like. Recycled PET products can also be used for raw materials, thus contributing to the recycle society.