POLYSACCHARIDES; DERIVATIVES THEREOF

Introduced: September 1968

Last revised: January 1985

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
Subclass:: POLYSACCHARIDES; DERIVATIVES THEREOF

Description

C08B encompasses polysaccharides and their chemical derivatives, including natural polymers such as cellulose, starch, gums, and glycans, as well as modified forms obtained through chemical treatment, cross-linking, or substitution. This subclass covers both the isolation and purification of polysaccharides from natural sources and their synthetic preparation, chemical working-up, and formulation into composition-based products. Typical applications include food additives, thickening agents, biodegradable polymers, pharmaceutical excipients, and industrial binders. Adjacent classes cover other macromolecular compounds (C08C-C08L) and specific processing aspects covered under C08H and related subdivisions.

Additional Content

Glossary

Saccharide radical saccharide radicals Saccharide radicals are monosaccharide, i.e. carbohydrate repeating units. Glycosidic linkage glycosidic linkages A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. A glycosidic bond is formed between the hemiacetal group of a saccharide (or a molecule derived from a saccharide) and the hydroxyl group of some organic compound. If the group attached to the carbohydrate residue is not another saccharide it is referred to as an aglycone. If it is another saccharide, the resulting units can be termed as being at the reducing end or the terminal end of the structure. The reducing end of the di- or polysaccharide is towards the last anomeric carbon of the structure, and the terminal end is in the opposite direction. One distinguishes between α- and β-glycosidic bonds based on the relative stereochemistry of the anomeric position and the stereocentre furthest from C1 in the saccharide. In D-hexose sugars in their pyranose forms, an α-glycosidic bond is formed in an axial orientation, whereas a β-glycosidic bond will be oriented equatorially.

Limiting references

Mono-, di- or oligo-saccharides with five or less saccharide radicals Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a polysaccharide Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a cellulose or derivative thereof Grafted or block polysaccharides obtained by reaction of a polymer with a polysaccharide Fermentation or enzyme-using processes to synthesize polysaccharides Production of cellulose

Application references

Application of polysaccharide compositions as pesticides, herbicides, biocides or disinfectants Treatment or baking of flour or dough Animal feeding stuffs Layered products Application of polysaccharide compositions as explosive compositions Application of polysaccharide compositions for drilling or treating of boreholes or wells Detergents containing polysaccharide compositions

Related Keywords

CELLULOSEcellulosic PLASTICSPOLYSACCHARIDES

15 direct subcodes

Child Classifications

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C08B 1/00 Preparatory treatment of cellulose for making derivatives thereof
C08B 11/00 Preparation of cellulose ethers
C08B 13/00 Preparation of cellulose ether-esters
C08B 15/00 Preparation of other cellulose derivatives or modified cellulose
C08B 16/00 Regeneration of cellulose
C08B 17/00 Apparatus for esterification or etherification of cellulose
C08B 3/00 Preparation of cellulose esters of organic acids
C08B 30/00 Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
C08B 31/00 Preparation of chemical derivatives of starch
C08B 33/00 Preparation of chemical derivatives of amylose
C08B 35/00 Preparation of chemical derivatives of amylopectin
C08B 37/00 Preparation of polysaccharides not provided for in groups; Derivatives thereof
C08B 5/00 Preparation of cellulose esters of inorganic acids
C08B 7/00 Preparation of cellulose esters of both organic and inorganic acids
C08B 9/00 Preparation of cellulose xanthate or viscose

Top Applicants

Top 10 applicants by patent filingsfor class C08, 2013–2023, worldwide · Source: EPO PATSTAT

LG CHEM KR 14,262
DOW GLOBAL TECHNOLOGIES US 12,486
BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,858
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,877
CHINESE ACADEMY OF SCIENCES 6,993
FUJIFILM JP 5,049
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 4,923
SHIN-ETSU CHEMICAL COMPANY JP 4,517
BOREALIS AT 4,213
ARKEMA FR 4,098