|  | C |
SECTION C — CHEMISTRY AND METALLURGY

|  | C |
Note(s) Definitions for Section C: Alkali metals: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: Ca, Sr, Ba, Ra Lanthanides: elements with atomic numbers 57 to 71 inclusive Rare earths: Sc, Y, Lanthanides Actinides: elements with atomic numbers 89 to 103 inclusive Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W Halogens: F, Cl, Br, I, At Noble gases: He, Ne, Ar, Kr, Xe, Rn Platinum group: Os, Ir, Pt, Ru, Rh, Pd Noble metals: Ag, Au, Platinum group Light metals: alkali metals, alkaline earth metals, Be, Al, Mg Heavy metals: metals other than light metals Iron group: Fe, Co, Ni Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens Metals: elements other than non-metals Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

CHEMISTRY

|  | C08 |
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON (production of artificial threads, fibres, bristles or ribbons Fulltext... Hierarchy... Expanded...D01)

|  | C08C |
TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

|  | C08C |
Note(s) This sub-class includes: processes directed to natural rubber or to conjugated diene rubbers (synthesis thereof Fulltext... Hierarchy... Expanded...C08F); processes directed to rubbers in general (to a specific rubber, other than provided for by (a) above, Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08F-C08H). [2]

|  | C08C 1/00 - C08C 19/00 |
Preparation

|  | C08C 1/00 |
Treatment of rubber latex

|  | C08C 1/02 |
· | Chemical or physical treatment of rubber latex before or during concentration

|  | C08C 1/04 |
· · | Purifying; Deproteinising

|  | C08C 1/06 |
· · | Preservation of rubber latex (preserving ingredients Fulltext... Hierarchy... Expanded...C08K)

|  | C08C 1/065 |
· · | Increasing the size of dispersed rubber particles [2]

|  | C08C 1/07 |
· · · | characterised by the agglomerating agents used [2]

|  | C08C 1/075 |
· · | Concentrating [2]

|  | C08C 1/08 |
· · · | with the aid of creaming agents [2]

|  | C08C 1/10 |
· · · | by centrifugation [2]

|  | C08C 1/12 |
· · · | by evaporation [2]

|  | C08C 1/14 |
· | Coagulation

|  | C08C 1/15 |
· · | characterised by the coagulants used [2]

|  | C08C 1/16 |
· · | in floc form

|  | C08C 2/00 |
Treatment of rubber solutions [2]

|  | C08C 2/02 |
· | Purification [2]

|  | C08C 2/04 |
· · | Removal of catalyst residues [2]

|  | C08C 2/06 |
· | Winning of rubber from solutions [2]

|  | C08C 3/00 |
Treatment of coagulated rubber

|  | C08C 3/02 |
· | Purification [2]

|  | C08C 4/00 |
Treatment of rubber before vulcanisation, not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C08C 1/00-C08C 3/02 [2]

|  | C08C 19/00 |
Chemical modification of rubber (crosslinking agents, other than provided for by group Fulltext... Hierarchy... Expanded...C08C 19/30, Fulltext... Hierarchy... Expanded...C08K) [2]

|  | C08C 19/00 |
Note(s) In the absence of an indication to the contrary, a process is classified in the last appropriate place. [2]

|  | C08C 19/02 |
· | Hydrogenation [2]

|  | C08C 19/04 |
· | Oxidation [2]

|  | C08C 19/06 |
· · | Epoxidation [2]

|  | C08C 19/08 |
· | Depolymerisation [2]

|  | C08C 19/10 |
· | Isomerisation; Cyclisation [2]

|  | C08C 19/12 |
· | Incorporating halogen atoms into the molecule [2]

|  | C08C 19/14 |
· · | by reaction with halogens [2]

|  | C08C 19/16 |
· · | by reaction with hydrogen halides [2]

|  | C08C 19/18 |
· · | by reaction with hydrocarbons substituted by halogen [2]

|  | C08C 19/20 |
· | Incorporating sulphur atoms into the molecule [2]

|  | C08C 19/22 |
· | Incorporating nitrogen atoms into the molecule [2]

|  | C08C 19/24 |
· | Incorporating phosphorus atoms into the molecule [2]

|  | C08C 19/26 |
· | Incorporating metal atoms into the molecule [2]

|  | C08C 19/28 |
· | Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers Fulltext... Hierarchy... Expanded...C08F) [2]

|  | C08C 19/30 |
· | Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule [2]

|  | C08C 19/32 |
· · | reacting with halogens or halogen-containing groups [2]

|  | C08C 19/34 |
· · | reacting with oxygen or oxygen-containing groups [2]

|  | C08C 19/36 |
· · · | with carboxy radicals [2]

|  | C08C 19/38 |
· · · | with hydroxy radicals [2]

|  | C08C 19/40 |
· · · | with epoxy radicals [2]

|  | C08C 19/42 |
· · | reacting with metals or metal-containing groups [2]

|  | C08C 19/44 |
· · · | of polymers containing metal atoms exclusively at one or both ends of the skeleton [2]