Fibrous materials are provided that comprise a cross-linkable urethane-based polymer (CUP) and an oligomeric or macromonomeric urethane-based cross-linker. The fibrous materials may be used in hydrogels, in filtration devices, in affinity membranes, in (protective) clothing, in drug delivery systems, and in tissue scaffolds, for example. The fibrous materials are useable also in human and/or veterinary medicine, such as in skin care and/or wound care.

A specific mixture of polyols, at least one of which contains the transesterification product of the polymer polylactic acid with natural oils. The mixture of polyols can be used as one component of a two-component adhesive for laminating flexible packaging. The other component comprises an isocyanate-functionalized compound. The two components are combined before use and the resulting adhesive can be used to bond films to form a flexible packaging material.

The object of the invention is a method for stabilizing polyester-resin-based bioplastics by means of specific carbodiimides.

Provided herein is a polymer having formula I: ##STR00001##
where m, n, and R.sup.1 are as defined herein, and the polymer has a number average molecular weight of the polymer of from 500 to 80,000 Daltons. Also provided herein are block copolymers of the polymer of formula I, as well as processes to make the polymer and block copolymers thereof.

The present invention relates to a curable antistatic primer composition, comprising: (d) at least one polyalkylene oxide polymer; (e) at least a Lithium salt; (f) at least an amorphizer selected from at least a dendritic polymer. The present invention also relates to an optical article having at least one surface comprising an antistatic primer coating obtained by depositing on a substrate and curing said composition, and its production method.

Described herein is a feasible, significantly simplified production method that avoids challenging lactonization steps and converts a low molecular weight aliphatic polyester, consisting of hydroxy acids and a comonomer, whose molecular weight has been increased by step-growth polymerization reactions. The molecular weight of the aliphatic polyester, based on comparison of initial and final weight average molecular weights (M.sub.w,1/M.sub.w,2), increased significantly at a rate which permits the use of reactive extrusion to produce high molecular weight aliphatic polyesters in a simple, economically feasible manner.

A polymer is represented by Formula (I):

##STR00001##

wherein X is a substituted or unsubstituted C.sub.2-C.sub.5 alkylene, alkenylene, or alkynylene group; Y is a substituted or unsubstituted divalent C.sub.2-C.sub.5 aliphatic hydrocarbyl group; Z is a divalent binding group; k is in a range from 0 to 3; m is in a range from 7 to 100; p is in a range from 0 to 30; n is in a range from 0 to 3; and q is in a range from 3 to 50.

The polymer is used as a nucleating agent for PET resin.

A method of producing a five-carbon ring derivative-containing polyurethane involves introducing a DCPD-derived 5-carbon cyclic compound into a polyurethane material and effectuating polymerization in the presence of a solvent of a low boiling point and low toxicity to produce a five-carbon ring derivative-containing polyurethane of a high molecular weight.

Among other things, the present disclosure provides compositions and methods for an elastomeric cross-linked polyester material. Such an elastomeric cross-linked polyester material, in sonic embodiments, comprises a plurality of polymeric units of the general formula (-A-B-).sub.p, wherein p is an integer greater than 1; and a plurality of urethane cross-links each of which covalently links two polymeric units to one another, which two linked polymeric unit each had at least one free hydroxyl or amino group prior to formation of the crosslink.

There is provided a composition comprising: (i) a hyperbranched polymer having peripheral reactive groups comprising epoxy functional groups and hydroxyl functional groups; and (ii) a compound having one or more hydrophilic functional groups, wherein the amount of epoxy functional groups relative to the total number of peripheral reactive groups does not render the hyperbranched polymer from being indispersible in an aqueous solvent. There is also provided a method of preparing the same and uses thereof.