In one aspect, adhesives for use with a 3D printer are described herein. In some embodiments, an adhesive for use with a 3D printer comprises a first polymeric component comprising a poly(vinyl alcohol) and a second polymeric component. The poly(vinyl alcohol), in some embodiments, comprises amorphous poly(vinyl alcohol). In some embodiments, the second polymeric component comprises a water-soluble polymer. Further, in some embodiments, an adhesive described herein further comprises a solvent, a surfactant, and/or a preservative.

An antibacterial polymer and a preparation method thereof are provided. The antibacterial polymer is obtained by polymerization of a polyol and a guanidine salt, and has the following structure:

##STR00001##

In the preparation method, non-toxic and non-irritating polyols are used as raw materials, wherein the non-toxic and non-irritating polyols are friendly to an environment and a human body.

An antibacterial polymer and a preparation method thereof are provided. The antibacterial polymer is obtained by polymerization of a polyol and a guanidine salt, and has the following structure:

##STR00001##

In the preparation method, non-toxic and non-irritating polyols are used as raw materials, wherein the non-toxic and non-irritating polyols are friendly to an environment and a human body.

Provided is an ethyleneimine polymer which exhibits excellent close adhesion properties and adhesive properties and has a low water content, and a method for producing the same. An ethyleneimine polymer, in which the number average molecular weight (Mn) of the ethyleneimine polymer measured by gel permeation chromatography in terms of pullulan is 13,000 or more and the value obtained by dividing the weight average molecular weight by the number average molecular weight (weight average molecular weight: Mw/number average molecular weight: Mn=degree of dispersion) of the ethyleneimine polymer is from 1.4 to 3.0.

The present disclosure relates to branched polymers and polyplexes which find use in gene therapy applications as safe and non-toxic nucleic acid transfection agents.

Provided is a polymer compound useful for production of a light emitting device excellent in external quantum yield. The polymer compound includes a constitutional unit represented by the formula (1):

##STR00001##

wherein a.sup.1 and a.sup.2 represent 0 or 1, Ar.sup.A1 and Ar.sup.A3 represent an arylene group or the like, and in each of Ar.sup.A1 and Ar.sup.A3 at least one atom adjacent to an atom forming a bond to the constitutional unit adjacent to the each of Ar.sup.A1 and Ar.sup.A3 has an alkyl group or the like as a substituent, Ar.sup.A2 represents a phenylene group, Ar.sup.A4 represents an arylene group or the like, R.sup.A1, R.sup.A2 and R.sup.A3 represent an aryl group or the like, and when a.sup.2 is 0, R.sup.A1 represents an aryl group in which two or more rings are condensed (the number of carbon atoms constituting the rings of the aryl group is 10 or more) or the like.

A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

##STR00001##

A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.

##STR00001##

A binder comprising the products of a carbohydrate reactant and polyamine is disclosed. The binder is useful for consolidating loosely assembled matter, such as fibers. Uncured fibrous products comprising fibers in contact with a carbohydrate reactant and a polyamine are also disclosed. The binder composition may be cured to yield a fibrous product comprising fibers bound by a cross-linked polymer. Further disclosed are methods for binding fibers with the carbohydrate reactant and polyamine based binder.

A binder comprising the products of a carbohydrate reactant and polyamine is disclosed. The binder is useful for consolidating loosely assembled matter, such as fibers. Uncured fibrous products comprising fibers in contact with a carbohydrate reactant and a polyamine are also disclosed. The binder composition may be cured to yield a fibrous product comprising fibers bound by a cross-linked polymer. Further disclosed are methods for binding fibers with the carbohydrate reactant and polyamine based binder.