A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, ##STR00001##
wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.

The present invention provides resin beads that can provide various types of products such as cosmetics which are unlikely to generate an odor and have superior tactile impression and spreadability on the skin and that can be substituted for resin particles composed of a synthetic material derived from petroleum, and the present invention also provides various types of products such as cosmetics using the resin beads. The resin beads are formed with a resin containing a cellulose derivative as a main component. In the resin beads, the cellulose derivative is at least one selected from the group consisting of cellulose acetate, cellulose acetate propionate, ethyl cellulose, and hydroxypropyl methyl cellulose, the volume average particle diameter is 50 μm or smaller, the degree of sphericity is 0.7 to 1.0, the degree of surface smoothness is 80 to 100%, the acetyl group content ratio is 15% by mass or less, and the propionyl group content ratio is 10% by mass or more. In addition, the present invention provides a product of any one of a cosmetic, a dermatological preparation, a paint, a shaped article, a film, a coating agent, and a resin composition, which contain the resin beads.

Disclosed is a cellulose ester-based composition, The cellulose ester-based composition of the present invention includes comprising at least 51% by weight cellulose ester based on the total weight of polymer in the composition and polyvinyl acetal. Related calendered articles and flooring articles are also described.

This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.

The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

A method for degrading crosslinked and poly(acrylic acid)-based superabsorbent polymer (SAP) into soluble polyacrylic acid polymers is disclosed. Degradation is achieved with an oxidative water-soluble salt comprising at least one cation and at least one anion.

Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, −A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.

This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.

The present invention provides a method for producing resin beads which can provide various types of products, such as cosmetics, imparted with superior tactile impression, spreadability on the skin, transparency, and product stability, and which can be substituted for resin particles composed of a synthetic material derived from petroleum. The method is a method for producing resin beads containing a cellulose derivative as a main component. The production method includes: a suspension preparation step of mixing an oil phase containing the cellulose derivative and an organic solvent that dissolves the cellulose derivative, the organic solvent having a water-solubility of 0.1 to 50.0 g, and an aqueous phase containing a dispersion stabilizer, thereby preparing a suspension containing oil droplets containing the cellulose derivative and the organic solvent; and an oil droplet contraction step of adding water to the suspension, thereby contracting the oil droplets, wherein the water is added to the suspension in such a way as to satisfy the following expression (A) until a content of the organic solvent in the suspension becomes equal to or less than the water-solubility of the organic solvent.

(W/S)/T≤1.00  (A), wherein

W: an addition amount of water (parts by mass),

S: an amount of the suspension (parts by mass), and

T: a time (minutes) required for addition.

A biodegradable resin particle, includes: a base particle containing a biodegradable resin; a first layer on a surface of the base particle, the first layer containing at least one cationic resin of a polyalkyleneimine, a polyallylamine and a polyvinylamine; and a second layer on the first layer, the second layer containing an anionic or nonionic hydrophobic compound.