Jvs-polymers Oy

Vivoxid Oy

Helsinki University of Technology

Upm-kymmene Corporation

Aalto University Foundation

Coolbrook Oy

Upm Specialty Papers Oy

Jukka Seppälä

Johan-Fredrik Selin

Veli-Matti Purola

Harri Kosonen

Janne Kylmä

Leila Pohjola

Risto Hakala

Arto Salminen

Jukka Kivivasara

Petri Tani

Harri Korhonen

Kaj Koskinen

Jukka Tuominen

Riitta Minna Hannele Malin

Timo Koskinen

Jarkko Saarinen

A method of modifying the surface of a substrate which comprises a fibrous material. According to the present invention, the surface is brought into contact with a type of amphiphilic block copolymer which comprises one or several hydrophilic polymeric blocks and one or several hydrophobic polymeric blocks. Approximately 0.01-3 g/mof the amphiphilic block copolymer are applied onto the surface. With the help of the present invention, it is possible to effectively modify the surface of paper in such a manner that it produces a good surface for printing, for instance for ink-jet printing.

Method of modifying the printing surface of paper or board

A composition, prepolymer and method to produce a polymer based on biodegradable or essentially renewable crude materials, which can be crosslinked by free radicals. The composition is based on polyesters that are functionalized with unsaturated monomer units, in a way that unsaturated groups can be located along the polymer main chain as well as at the ends of the prepolymer. In connection to the product production, the prepolymer is exposed to free radicals that leads to network formation. The composition of the crosslinked biopolymer can be adjusted from a stiff engineering material to an elastic rubbery material. The new biopolymer can be used in composite materials, dispersions, barrier materials, rubbery materials, biomedical applications, and the like.

Crosslinkable biopolymer

Biodegradable polymers formed from biodegradable polyester-based prepolymers, to which ring-structured anhydrides which have different hydrophobicities have been connected, and which are either coupled to form linear thermoplastic polyester anhydrides or cross-linked to form network-structured polyester anhydrides. It is possible to adjust widely the degradation rate and mechanism of the polymers and thus they can be used, for example, in the controlled dosing of pharmaceutical ingredients, for tissue technological applications, in surgery and in bioactive composites.

Polyester anhydride-based biopolymers

The object of the present invention is a biodegradable polymer network and methods to make it. The polymer network consists of a cross-linked polyester resin, which is composed of hydroxy acid units, structural units derived from an unsaturated bifunctional monomer, and structural units derived from a polyol monomer. The polyester resin is produced directly by a polyoon-densation reaction, after which it is cross-linked to a polymer of high molecular weight The polyester can be co-polymerised with a co-monomer increasing flexibility, or be blended with a reactive macromonomer, which adds elasticity and crosslinking density. The prepared polymer network can be especially used to coat continuous or singular objects made of fibrous, porous, biomass based or inorganic materials, or as a blending component in these, or used to impregnate these in order to induce water durability, barrier properties, elasticity, coherence or mechanical strength.

Biodegradable coating

The invention relates to a heterophasic composition which essentially consists of three immniscible components, A, B and C, and the production method of the same. The component A is some body compatible polymer, the component H is a water soluble or hydrolytically degradable substance which produces cavities or network like porosity after disappearing through solubilization or degradation, and a bioactive substance C which at least component B contains in form of particles as a blend component and which still exists in the pores or their walls after the degradation or solubilization of the component B. The materials according to the invention are biocompatible, solid in normal temperatures, mechanically processable, and thermally mouldable as well as bioactive in the sense that they have the capability to renew different kinds of tissues in the body, on the surface of the living organisms, in the cavities of the body and in the tissue engineering conditions outside the body, and that they can be used in tissue engineering, in tissue regeneration, in healing of damaged or lacking tissues, in tissue guiding when treating deficiencies, in controlled drug release, in the treatment methods of dentistry, in orthopedics and in plastic surgery.

Biologically active material

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Helsinki, Finland

Jukka Seppälä