An aqueous suspension of polymer bodies is made by coalescing polymer from a flowing aqueous solution. These suspended bodies may be fibrous in appearance. However, the coalescence of the polymer bodies may be controlled to produce shapes. The coalesced polymer bodies are used for treating a downhole location within or accessed by a borehole. The bodies may be formed by coalescence at the surface and then pumped downhole or may be formed by coalescence downhole. Coalescence of polymer may result from crosslinking, complexing with material of opposite charge, or change in the polymer solution temperature, pH, solute concentration or solvent. The coalesced polymer bodies are maintained in aqueous solution after coalescence, and are not removed from solution for strengthening.

A method of preparing a hydrogel product including crosslinked glycosaminoglycan molecules, said method including: i) providing a glycosaminoglycan crosslinked by amide bonds, wherein the crosslinked glycosaminoglycans include residual amine groups; and ii) acylating residual amine groups of the crosslinked glycosaminoglycans provided in i) to form acylated crosslinked glycosaminoglycans.

The invention relates to a hydrogel product comprising glycosaminoglycan molecules as the swellable polymer, wherein the glycosaminoglycan molecules are covalently crosslinked via crosslinks comprising a spacer group selected from the group consisting of di-, tri-, tetra-, and oligosaccharides.

Materials and methods for preparing a hydrogel are disclosed. Specifically, two separate solutions A and B, of which the solution A comprises enzyme horseradish peroxidase and the solution B comprises hydrogen peroxide is provided. At least one of solution A or B comprises calcium ions in the form of a pharmaceutically acceptable salt, and further the solution A and/or the solution B comprises hydroxyphenyl derivative of hyaluronan of a particular formula. A hydrogel based on hydroxyphenyl derivative of hyaluronan and a method of preparing and using the same is also disclosed.

The present invention relates to a method for preparing a porous scaffold for tissue engineering. It is another object of the present invention to provide a porous scaffold obtainable by the method as above described, and its use for tissue engineering, cell culture and cell delivery. The method of the invention comprises the steps consisting of: a) preparing an alkaline aqueous solution comprising an amount of at least one polysaccharide, an amount of a cross-linking agent and an amount of a porogen agent b) transforming the solution into a hydrogel by placing said solution at a temperature from about 4° C. to about 80° C. for a sufficient time to allow the cross-linking of said amount of polysaccharide and c) submerging said hydrogel into an aqueous solution d) washing the porous scaffold obtained at step c).

The present invention is directed to a polysaccharide foil comprising a polysaccharide polymer and a plasticizer, wherein the polysaccharide polymer originates from fermentation of a bacterium or a fungus such as Ascomycota. The invention further relates to the use of the polysaccharide foil and a method for its production.

Disclosed are films and materials comprising poly(alkylene glycol)-chitosan and/or chitin-poly(glucuronic acid) and chitosan and/or chitin-poly(glucuronic acid). Methods of making such films, particularly involving thermally crosslinking poly(glucuronic acid) with chitosan, are disclosed.

The invention relates to a hydrogel product comprising glycosaminoglycan molecules as the swellable polymer, wherein the glycosaminoglycan molecules are covalently crosslinked via crosslinks comprising a spacer group selected from the group consisting of di-, tri-, tetra-, and oligosaccharides.

Disclosed herein are polysaccharide-elastomer masterbatch compositions and processes for preparing the masterbatch compositions. One method comprises a step of a) mixing i) an aqueous polysaccharide dispersion, or ii) a basic aqueous polysaccharide solution, with a rubber latex solution containing a rubber component to form a mixture. The method further comprises the steps of: b) coagulating the mixture obtained in step a) to produce a coagulated mass; and c) drying the coagulated mass obtained in step b). The masterbatch compositions are useful in preparing rubber-containing articles.

The invention relates to a method for providing control data of a laser device (10) for the non-destructive laser-induced property change of a polymer structure (14). As steps, the method includes ascertaining (S10) a respective irradiation parameter range for preset irradiation parameters of the laser device (10) by means of an irradiation model, wherein a property change model is provided in the irradiation model, in which a caused property change of the polymer structure (14) is modelled depending on the irradiation parameters, wherein a destruction threshold value model is provided in the irradiation model, in which at least one threshold value for a laser-induced optical breakthrough of the polymer structure is modelled depending on the irradiation parameters, and wherein the caused property change from the property change model is optimized while limiting by the threshold value from the destruction threshold value model for ascertaining the irradiation parameter ranges.