An object of the present invention is to provide a pulverized pulp in which the viscosity reduction caused by pulverization is mitigated and a method for producing cellulose ethers using such pulverized pulp. The above object is achieved by a pulverized pulp of being a pulverized product of a raw material pulp having a pH of 7.5 to 10.5 when measured by dispersing the raw material pulp in water, and having a percent decrease of 30% or less in viscosity caused by pulverization; and a method of producing a cellulose ether including reacting an alkali cellulose obtained from the pulverized pulp and an alkali metal hydroxide solution with an etherifying agent to obtain the cellulose ether.

Embodiments herein are directed to moisturizing compositions comprising interpenetrating polymer networks, methods of making moisturizing compositions and methods of using moisturizing compositions.

A process includes: (a) providing an initial cellulose ether powder containing 0.5 to 10 weight-percent water based on total cellulose ether powder weight; (b) heating the initial cellulose ether powder to a temperature in a range of 30 to 130 degrees Celsius; (c) before, during and/or after heating in step (b), adding solid base to the cellulose ether powder and mixing with the initial cellulose ether powder to form a cellulose ether/base mixture; (d) adding volatile acid to the cellulose ether/base mixture and mixing; and (e) allowing the volatile acid to hydrolyze the initial cellulose ether to form a final cellulose ether having a lower viscosity than the initial cellulose ether.

A three-dimensionally printed article comprises a build material and a support material, the support material comprising a hydroxypropyl methylcellulose having a DS of at least 1.0 and an MS of at least 0.6, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxypropoxyl groups. The support material can be removed from the build material by contacting the support material with water.

A non-aqueous silver precursor composition is composed of (a) one or more cellulosic polymers; (b) reducible silver ions that are present at a weight ratio to the one or more cellulosic polymers of 5:1 to 50:1; (c) an organic solvent that has a boiling point at atmospheric pressure of at least 100 C. and up to but less than 500 C.; and (d) a nitrogenous base having a pKa in acetonitrile of at least 15 and up to and including 25 at 25 C. The Hansen parameter (.sub.T.sup.Polymer) of each cellulosic polymer is less than or equal to the Hansen parameter (.sub.T.sup.Solvent) each organic solvent. In addition, the (d) nitrogenous base is present in an equimolar amount or molar excess in relation to the amount of (b) reducible silver ions.

A non-aqueous silver precursor composition is composed of (a) one or more cellulosic polymers; (b) reducible silver ions that are present at a weight ratio to the one or more cellulosic polymers of 5:1 to 50:1; (c) an organic solvent that has a boiling point at atmospheric pressure of at least 100 C. and up to but less than 500 C.; and (d) a nitrogenous base having a pKa in acetonitrile of at least 15 and up to and including 25 at 25 C. The Hansen parameter (.sub.T.sup.Polymer) of each cellulosic polymer is less than or equal to the Hansen parameter (.sub.T.sup.Solvent) each organic solvent. In addition, the (d) nitrogenous base is present in an equimolar amount or molar excess in relation to the amount of (b) reducible silver ions.

A non-aqueous silver precursor composition is composed of (a) one or more cellulosic polymers; (b) reducible silver ions that are present at a weight ratio to the one or more cellulosic polymers of 5:1 to 50:1; (c) an organic solvent that has a boiling point at atmospheric pressure of at least 100 C. and up to but less than 500 C.; and (d) a nitrogenous base having a pKa in acetonitrile of at least 15 and up to and including 25 at 25 C. The Hansen parameter (.sub.T.sup.Polymer) of each cellulosic polymer is less than or equal to the Hansen parameter (.sub.T.sup.Solvent) each organic solvent. In addition, the (d) nitrogenous base is present in an equimolar amount or molar excess in relation to the amount of (b) reducible silver ions.

A non-aqueous silver precursor composition is composed of (a) one or more cellulosic polymers; (b) reducible silver ions that are present at a weight ratio to the one or more cellulosic polymers of 5:1 to 50:1; (c) an organic solvent that has a boiling point at atmospheric pressure of at least 100 C. and up to but less than 500 C.; and (d) a nitrogenous base having a pKa in acetonitrile of at least 15 and up to and including 25 at 25 C. The Hansen parameter (.sub.T.sup.Polymer) of each cellulosic polymer is less than or equal to the Hansen parameter (.sub.T.sup.Solvent) each organic solvent. In addition, the (d) nitrogenous base is present in an equimolar amount or molar excess in relation to the amount of (b) reducible silver ions.

In a system where phase separation into two phases occurs when an ether cellulose derivative (A), a polymer (B) different from the ether cellulose derivative (A), and an alcohol solvent (C) are mixed together, the two phases including a solution phase mainly containing the ether cellulose derivative (A) and a solution phase mainly containing the polymer (B), the two separated phases containing approximately the same solvent, an emulsion is formed and brought into contact with a poor solvent (D) to provide an ether cellulose derivative microparticle having an average particle diameter of 1 to 1,000 m, a linseed oil absorption of 50 to 1,000 mL/100 g, and an average surface pore size of 0.05 to 5 m.

In a system where phase separation into two phases occurs when an ether cellulose derivative (A), a polymer (B) different from the ether cellulose derivative (A), and an alcohol solvent (C) are mixed together, the two phases including a solution phase mainly containing the ether cellulose derivative (A) and a solution phase mainly containing the polymer (B), the two separated phases containing approximately the same solvent, an emulsion is formed and brought into contact with a poor solvent (D) to provide an ether cellulose derivative microparticle having an average particle diameter of 1 to 1,000 m, a linseed oil absorption of 50 to 1,000 mL/100 g, and an average surface pore size of 0.05 to 5 m.