Abrégé

The present invention discloses polyelectrolyte complexes (PECs), e.g. water insoluble PECs, obtained by reacting a negatively charged hemicellulose-lignin co-polymer with a cationic polymer. The negatively charged hemicellulose-lignin co-polymers is selected from lignin carbohydrate complexes (LCC) from pre-hydrolysis sulphite pulping, LCC from pre-hydrolysis kraft pulping, LCC from mechanical pulping and chemical/mechanical pulping (TMP and CTMP). The cationic polymer is selected from cationic polysaccharides and cationic starches. Methods for production of PECs, are also disclosed.

Classes IPC  ?

• C08H 7/00 - LignineLignine modifiéeProduits dérivés à haut poids moléculaire
• C08B 37/14 - HémicelluloseSes dérivés
• C08H 8/00 - Composés macromoléculaires dérivés de matériaux lignocellulosiques
• C12P 19/04 - Polysaccharides, c.-à-d. composés contenant plus de cinq radicaux saccharide reliés entre eux par des liaisons glucosidiques

Produits et services

Adhesives for billposting; chemicals for use in agriculture; adhesives for paperhanging; polymer beads for use in manufacturing; reinforced polymers; polymers for industrial use; biological preparations for use in industry and science; chemical additives to polymers; polymer compounds for use in manufacture; chemical intensifiers for paper; chemicals for the manufacture of paints; chemicals used in forestry; degreasing preparations for use in manufacturing processes; descaling preparations, other than for household purposes; emulsifiers; flocculants; glue for industrial purposes; industrial chemicals; chemical polymers; ion exchangers [chemicals].

Produits et services

Adhesives for billposting; Chemicals for use in agriculture; Adhesives for paperhanging; Polymer beads for use in manufacturing; Reinforced polymers; Polymers for industrial use; Biological preparations for use in industry and science; Chemical additives to polymers; Polymer compounds for use in manufacture; Chemical intensifiers for paper; Chemicals for the manufacture of paints; Chemicals used in forestry; Degreasing preparations for use in manufacturing processes; Descaling preparations, other than for household purposes; Emulsifiers; Flocculants; Glue for industrial purposes; Industrial chemicals; Chemical polymers; Ion exchangers [chemicals].

Produits et services

Thickeners for paints; Paints; Lacquers; Varnishes; Dyes; Colorants; Bactericidal paints; Gum resins; Dyestuffs; Food dyes; Food colorants; Thinners for paints; Coatings [paints]; Natural resins, raw; Wood coatings [paints]. Degreasers, other than for use in manufacturing processes; Non-medicated cosmetics and toiletry preparations; Cleaning preparations; Cosmetic creams; Cosmetics. Packing [cushioning, stuffing] materials of paper or cardboard; Paper and cardboard; Absorbent sheets of paper or plastic for foodstuff packaging; Boxes of cardboard or paper; Cardboard; Packaging material made of starches; Sheets of reclaimed cellulose for wrapping; Viscose sheets for wrapping; Wood pulp board [stationery]; Wood pulp paper; Packing paper; Wrapping paper. Science and technology services; biological research; cosmetic research; scientific laboratory services; scientific research; none of the aforesaid services being in the fields of population health, DNA sequencing or genetics; engineering; technological consultancy; technological research; industrial design services; design of manufacturing methods; technological services relating to manufacture; computer aided design for manufacturing operations.

Abrégé

A method to increase the molecular weight of wood mannans and xylans comprising aromatic moieties comprises the steps: a) obtaining mannan and/or xylan from wood, b) subjecting the mannan/xylan to oxidizing conditions to convert at least a fraction of the aromatic groups into radicals and reacting said radicals with each other to obtain complexes of mannan/xylan with increased molecular weight. The method is easy and cost efficient and enables to upgrade small wood mannans and xylans that are important in the pulp and paper industry into larger mannans and xylans and more defined structures which makes their isolation easier and application areas broader. Another advantage is that separation of mannans and xylans from mannans and xylans with bound aromatic groups is provided. The wood mannans and xylans with increased molecular weight can be used for the manufacture of barrier films in packages, for instance for oxygen, liquids and gas.

Classes IPC  ?

• C08B 37/00 - Préparation des polysaccharides non prévus dans les groupes Leurs dérivés
• C08H 8/00 - Composés macromoléculaires dérivés de matériaux lignocellulosiques
• C12P 19/04 - Polysaccharides, c.-à-d. composés contenant plus de cinq radicaux saccharide reliés entre eux par des liaisons glucosidiques
• C08B 37/14 - HémicelluloseSes dérivés
• C08H 7/00 - LignineLignine modifiéeProduits dérivés à haut poids moléculaire