摘要:
Esterified cellulose ethers which comprise (i) groups of the formula —C(O)—R—COOA or (ii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, which have a viscosity of up 50 mPa·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C., and a weight average molecular weight Mw of at least 220,000 Dalton, or which have a viscosity of up 100 mPa·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C., and a weight average molecular weight Mw of at least 310,000 Dalton are useful for preparing solid dispersions comprising drugs.
摘要:
A hair fixative composition includes at least one carboxylated cellulose ether based polyglucose polymer, an alcohol based solvent system, and a cosmetically acceptable additive, wherein the polyglucose polymer is soluble in the alcohol based solvent system. The polyglucose polymer is obtained by reacting at least one cellulose ether with at least one anhydride.
摘要:
Disclosed is a cellulose acylate film containing a compound having at least one connecting group selected from a group consisting of a bivalent connecting group denoted by —NH—(C═O)—O— and a bivalent connecting group denoted by —NH—(C═O)—NR— in which R represents a hydrogen atom or a substituent group, and at least one polar group which is a residue of a compound having a C log P value of less than or equal to 0.85 (however, an aromatic hetero ring-containing group which is a residue of a compound having a C log P value of less than or equal to 0.85 is excluded from the polar group), in which an equivalent weight U obtained as a value which is obtained by dividing a molecular weight by the number of connecting groups included in one molecule is less than or equal to 515.
摘要:
Provided is an optical film containing a cellulose derivative, the optical film having an in-plane retardation Ro550 within the range of 120 to 160 nm measured at a wavelength of 550 nm under an atmosphere of a temperature of 23° C. and a relative humidity of 55%, and a ratio Ro450/Ro550 within the range of 0.65 to 0.99, Ro450/Ro550 being a ratio of an in-plane retardation Ro450 measured at a wavelength of 450 nm to the in-plane retardation Ro550 measured at a wavelength of 550 nm, wherein, a substituent of a glucose skeleton in the cellulose derivative satisfies the requirements (a) and (b) which are described in the specification, and the optical film contains a compound A satisfying the following condition defined by Expression (a1) which is described in the specification.
摘要:
Compositions containing an aqueous dispersion of selected polymers and selected polyaldehydes as crosslinking agents are described.Adhesives having very high resistance to boiling water can be produced from these formulations.
摘要:
Disclosed are acetylated cellulose ether, a method of preparing the same, and an article including the same. The disclosed acetylated cellulose ether has a degree of substitution (DS) of alkyl group of 1 to 2, a molar substitution (MS) of hydroxyalkyl group of 0 to 1, and a degree of substitution (DS) of acetyl group of 1 to 2; and a bulk density of 0.1 to 0.4.
摘要:
Pharmaceutical compositions of a low-solubility drug and lower alkanoate-, phthalate- and trimellitate esters of hydroxypropyl methyl cellulose and lower alkanoate- and succinate esters of cellulose and methyl cellulose are disclosed that provide enhanced concentrations of the drug in a use environment.
摘要:
A cellulose derivative and a resin composition having good thermoplasticity, strength, and elongation at break and therefore suited to molding processing are provided. The cellulose derivative is derived by replacing at least part of the hydrogen atoms of the hydroxyl groups of cellulose with a hydrocarbon group and an aliphatic or aromatic oxycarbonyl group.
摘要:
Disclosed are polymers of hydroxypropyl methyl cellulose acetate succinate (HPMCAS) with unique degrees of substitution of hydroxypropoxy, methoxy, acetyl, and succinoyl groups. When used in making compositions comprising a low-solubility active agent and such polymers, the polymers provide increased aqueous concentrations and/or improved physical stability of the active agent.
摘要:
Provided are a coating composition for delayed release preparation capable of releasing a drug promptly in the stomach, without causing a time-dependent change, after a time (lag time) in which a solid preparation does not release the drug; and a solid preparation obtained by coating of the coating composition. More specifically, provided are a coating composition comprising at least a nonionic water-soluble cellulose ether and a cellulose-based enteric base material, wherein a weight ratio of the nonionic water-soluble cellulose ether to the cellulose-based enteric base material is from 95:5 to 65:35; and a solid preparation comprising at least a drug-containing core and the coating composition which covers the core, wherein the preparation can permit prompt dissolution of the drug in a stomach after a lag time.