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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
NOTE
-
This subclass includes:
- processes directed to natural rubber or to conjugated diene rubber (synthesis thereof C08F)
- processes directed to rubbers in general (to a specified rubber, other than provided for
by (a) above, C08F to C08H)

WARNING
-
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
C08C1/16 covered by C08C 1/14

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Treatment of rubber latex
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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 C08K)
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C08C 1/065
. .
Increasing the size of dispersed rubber particles
C08C 1/07
. . .
characterised by the agglomerating agents used
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C08C 1/075
. .
Concentrating
C08C 1/08
. . .
with the aid of creaming agents
C08C 1/10
. . .
by centrifugation
C08C 1/12
. . .
by evaporation
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C08C 1/14
.
Coagulation
C08C 1/145
. .
{
Heat-sensitising agents
}
C08C 1/15
. .
characterised by the coagulants used
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Treatment of rubber solutions
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C08C 2/02
.
Purification
C08C 2/04
. .
Removal of catalyst residues
C08C 2/06
.
Wining of rubber from solutions
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Treatment of coagulated rubber
C08C 3/02
.
Purification
C08C 4/00
Treatment of rubber before vulcanisation, not provided for in groups C08C 1/00 to C08C 3/02
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Chemical modification of rubber (crosslinking agents, other than provided for by C08C 19/30, C08K)
NOTE
-
In the absence of an indication to the contrary a process is classified in the last appropriate place

C08C 19/02
.
Hydrogenation
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C08C 19/04
.
Oxidation
C08C 19/06
. .
Epoxidation
C08C 19/08
.
Depolymerisation
C08C 19/10
.
Isomerisation; Cyclisation
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C08C 19/12
.
Incorporating halogen atoms into the molecule
C08C 19/14
. .
by reaction with halogens
C08C 19/16
. .
by reaction with hydrogen halides
C08C 19/18
. .
by reaction with hydrocarbons substituted by halogen
C08C 19/20
.
Incorporating sulfur atoms into the molecule
C08C 19/22
.
Incorporating nitrogen atoms into the molecule
C08C 19/24
.
Incorporating phosphorus atoms into the molecule
C08C 19/25
.
Incorporating silicon atoms into the molecule
C08C 19/26
.
Incorporating metal atoms into the molecule
C08C 19/28
.
Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers C08F)
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C08C 19/30
.
Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
C08C 19/32
. .
reacting with halogens or halogen-containing groups
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C08C 19/34
. .
reacting with oxygen or oxygen-containing groups
C08C 19/36
. . .
with carboxy radicals
C08C 19/38
. . .
with hydroxy radicals
C08C 19/40
. . .
with epoxy radicals
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C08C 19/42
. .
reacting with metals or metal-containing groups
. . .
of polymers containing metal atoms exclusively at one or both ends of the skeleton
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C08C 2019/00
Chemical modification of rubber (crosslinking agents, other than provided for by C08C 19/30, C08K)
NOTE
-
In the absence of an indication to the contrary a process is classified in the last appropriate place

C08C 2019/09
.
Metathese
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Last Modified: 10/10/2013