Provided is a sizing-coated carbon fiber bundle that exhibits good spreadability in a step for spreading sizing-coated carbon fibers even in the case in which said carbon fibers exhibit a high adhesiveness with respect to a thermoplastic resin. Provided is a sizing-coated carbon fiber bundle that contains, as sizing components, at least a compound (A) containing an amino group or an amide group.

Provided is a composition for the treatment of fibers, such as PAN precursor fibers. The finish composition includes a polysiloxane; an emulsifier; water; and a dicarboxylic acid having a pK.sub.a from 1 to 4, and boiling point from 200 to 400 C. The dicarboxylic acid may have the following formula:

##STR00001##

where R.sub.1 is absent or a saturated or unsaturated, linear or branched, aromatic substituted or unsubstituted, hydrocarbon group; Y.sub.1 and Y.sub.2 are independently hydrogen, nitrogen, oxygen, sulfur, phosphorus, C.sub.1-C.sub.6 alkyl group, or an alkoxy group; and X.sub.1 and X.sub.2 are independently one or more hydrogen atoms, a metal, a quaternary amine, or a hydrocarbon group having up to 6 carbon atoms, the hydrocarbon group being an alkyl group, an alkylene group, or an aromatic group, which may be branched or linear, and may optionally have one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur and phosphorus.

Provided is a composition for the treatment of fibers, such as PAN precursor fibers. The finish composition includes a polysiloxane; an emulsifier; water; and a dicarboxylic acid having a pK.sub.a from 1 to 4, and boiling point from 200 to 400 C. The dicarboxylic acid may have the following formula:

##STR00001##

where R.sub.1 is absent or a saturated or unsaturated, linear or branched, aromatic substituted or unsubstituted, hydrocarbon group; Y.sub.1 and Y.sub.2 are independently hydrogen, nitrogen, oxygen, sulfur, phosphorus, C.sub.1-C.sub.6 alkyl group, or an alkoxy group; and X.sub.1 and X.sub.2 are independently one or more hydrogen atoms, a metal, a quaternary amine, or a hydrocarbon group having up to 6 carbon atoms, the hydrocarbon group being an alkyl group, an alkylene group, or an aromatic group, which may be branched or linear, and may optionally have one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur and phosphorus.

A rubber-reinforcing cord of the present invention is a rubber-reinforcing cord for reinforcing a rubber product. The rubber-reinforcing cord includes at least one strand. The strand includes at least one filament bundle and a coating provided to cover at least a portion of a surface of the filament bundle. The coating includes a rubber component and a crosslinking agent. The crosslinking agent includes two or more isocyanate compounds.

A water- and oil-repellent agent contains cellulose nanofibers, a compound having at least one functional group of an oxazoline group, a carbodiimide group, an epoxy group and an isocyanate group, as a crosslinking agent, and a perfluoroalkyl compound.

A water- and oil-repellent agent contains cellulose nanofibers, a compound having at least one functional group of an oxazoline group, a carbodiimide group, an epoxy group and an isocyanate group, as a crosslinking agent, and a perfluoroalkyl compound.

The present disclosure provides a method for producing a cell-culturing polyvinyl alcohol-based nanofiber structure, the method comprising: electrospinning an electrospun solution to form a nanofiber mat, wherein the electrospun solution contains polyvinyl alcohol (PVA), polyacrylic acid (PA) and glutaraldehyde (GA); crosslinking the nanofiber mat via a hydrochloric acid (HCl) vapor treatment; and treating the crosslinked nanofiber mat with dimethylformamide (DMF) solvent to crystallize the nanofiber mat.

The present disclosure provides a method for producing a cell-culturing polyvinyl alcohol-based nanofiber structure, the method comprising: electrospinning an electrospun solution to form a nanofiber mat, wherein the electrospun solution contains polyvinyl alcohol (PVA), polyacrylic acid (PA) and glutaraldehyde (GA); crosslinking the nanofiber mat via a hydrochloric acid (HCl) vapor treatment; and treating the crosslinked nanofiber mat with dimethylformamide (DMF) solvent to crystallize the nanofiber mat.

An oil-resistant agent containing a modified natural product which is a bio-based compound having at least one carboxyl group and in which a hydroxyl group of a carboxyl group is substituted with an R group, or a carboxyl group is substituted with an Ra group. R group: XR.sup.1 or X-D-XR.sup.1. Ra group:

##STR00001##

wherein X is a direct bond, O, NR.sup.11, or S, and R.sup.1 is a hydrocarbon group having 1-40 carbon atoms, or a polysiloxane, D is an alkylene group having 1-10 carbon atoms, X is C(?O)O, O(?O), C(?O)NR.sup.12, or NR.sup.12C(?O) (where, R.sup.11 and R.sup.12 are each hydrogen or an alkyl group having 1-40 carbon atoms). Also disclosed is a textile product, an oil-resistant paper, a food packaging material or a food container each including the oil-resistant agent, as well as a method of treating paper with the oil-resistant agent.

An oil-resistant agent containing a modified natural product which is a bio-based compound having at least one carboxyl group and in which a hydroxyl group of a carboxyl group is substituted with an R group, or a carboxyl group is substituted with an Ra group. R group: XR.sup.1 or X-D-XR.sup.1. Ra group:

##STR00001##

wherein X is a direct bond, O, NR.sup.11, or S, and R.sup.1 is a hydrocarbon group having 1-40 carbon atoms, or a polysiloxane, D is an alkylene group having 1-10 carbon atoms, X is C(?O)O, O(?O), C(?O)NR.sup.12, or NR.sup.12C(?O) (where, R.sup.11 and R.sup.12 are each hydrogen or an alkyl group having 1-40 carbon atoms). Also disclosed is a textile product, an oil-resistant paper, a food packaging material or a food container each including the oil-resistant agent, as well as a method of treating paper with the oil-resistant agent.