Crosslinked biodegradable block polyurethane copolymers prepared from a plurality of biodegradable polymers or oligomers linked together via urethane bonds and crosslinked via a citrate ester are disclosed. Such copolymers can include folic acid and fabricated into medical devices such as a nerve growth conduit and locally deliver folic acid to a site of injury such as a PNS injury site.

Low hydroxyl value dibenzoate plasticizer for use in a reactive polyurethane composition, including but not limited to thermoplastic and thermoset polyurethanes, wherein the plasticizer is particularly useful in TPU's, a reactive polyurethane adhesive or sealant, or a tastable polyurethane article and achieves comparable or improved properties, including without limitation compatibility, color, exudation, optical properties, MVTR, hardness, tensile strength, tear strength, rebound, compression set, and solvent swell, when compared with that achieved with traditional plasticizers, including other benzoate esters, used in polyurethane compositions.

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 some 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.

The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of ≥98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of ≥51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of ≤60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.

A coating liquid includes: ultrafine zinc oxide particles; a polyester resin; an ammonium polycarboxylate salt; and water, in which an amount of the ammonium polycarboxylate salt is from 1 to 35 mass % with respect to that of the ultrafine zinc oxide particles.

A slitting machine (500) includes a laminated film unwinding apparatus (540), a release liner recovery apparatus (550), a cutting apparatus (530), and a plurality of polymer substrate strip rewinding apparatuses (510, 520). The laminated film unwinding apparatus (540) is operable to unwind a roll of laminated film (542) comprising at least a polymer substrate (100) and a release liner (150). The release liner recovery apparatus (550) is operable to wind the release liner (150) that is released from the polymer substrate (100). The cutting apparatus (530) is operable to cut at least the polymer substrate (100) along a machine direction to divide the polymer substrate into strips. The plurality of polymer substrate strip rewinding apparatuses (510, 520) are operable to wind one or more strips of the polymer substrate (100) onto one or more rolls (512, 522). The slitting machine (500) is operable to carry out a method for forming rolls (512, 522) of coated films (100).

Disclosed herein are improved methods for bonding textiles using an adhesive composition.

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 some 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.

Disclosed herein are improved methods for bonding textiles using an adhesive composition.

Coatings and compositions are provided for coating particulates that can be used as, for example, as proppants. The proppants can be used, for example, to extract oil and gas from subterranean formations.