EP0890598A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Modified polysiloxanes, rubber compositions and tire tread rubber compositions containing the same, and reactive plasticizer
Assignee: Yokohama Rubber Co Ltd
•
Filing: 1997-12-26
•
Granted: —
•
Expires: 2017-12-26
Abstract
Abstract A polysiloxane having a siloxane structure of the following formulas (1) and (2), or (1) and (3): wherein, R 1 is a C 1 to C 6 alkyl group or C 1 to C 21 acyl group, R 2 is a C 2 to C 4 alkylene group, R 3 is a monovalent hydrocarbon group, a is 1 to 200, b is 1 to 200, c is 1 to 200, t is 2 or 3, r is 1 to 100, and s is 1 to 100. A siloxane-based reactive plasticizer having as a plasticizer ingredient at least 50 wt% of an organic group containing an ester group or an aliphatic or aromatic hydrocarbon group and having as a reactive group in a molecule at least one of an alkoxysilyl group and an acyloxysilyl group.
Inventors
- 👤 Kazunori The Yokohama Rubber Co. Ltd ISHIKAWA
- 👤 Fumito The Yokohama Rubber Co. Ltd YATSUYANAGI
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:39
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/04; C08G77/14; C08G77/18; C08G77/38; C08G77/42; C08G77/442; C08G77/46; C08L; C08L21/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
54 words
A polysiloxane having a siloxane structure of
the following formulas (1) and (2): wherein R 1 is a C 1 to C 6 alkyl group or C 1 to C 21 acyl
group, a is 1 to 200, b is 1 to 200, t is 2 or 3, and r
is 1 to 100.
Claim 2
Dependent Claim
72 words
A polysiloxane having a siloxane structure of
the following formulas (1) and (3): wherein R 1 is a C 1 to C 6 alkyl group or C 1 to C 21 acyl
group, R 2 is a C 2 to C 4 alkylene group, R 3 is a monovalent
hydrocarbon group, a is 1 to 200, c is 1 to 200, t is 2
or 3, and s is 1 to 100.
Claim 3
Dependent Claim
31 words
A rubber composition characterized by
comprising 100 parts by weight of rubber and 1 to 50
parts by weight of a polysiloxane according to claim 1
and/or claim 2 formulated therein.
Claim 4
Dependent Claim
11 words
A rubber composition as set forth in claim 3,
comprising silica.
Claim 5
Dependent Claim
111 words
A tire tread rubber composition comprising 100
parts by weight of at least one rubber selected from the
group consisting of natural rubber, polybutadiene rubber,
styrene-butadiene copolymer rubber, and polyisoprene
rubber and 45 to 80 parts by weight of at least one
filler selected from the group consisting of carbon
blacks having a specific surface area by nitrogen
adsorption (N 2 SA) of 50 to 170 m 2 /g and a dibutyl
phthalate oil absorption (DBP) of 60 to 140 ml/100 g or
other fillers, 5 to 50 parts by weight of a polysiloxane
according to claim 1 and/or claim 2, and a softening
agent and other rubber chemicals formulated therein.
Claim 6
Dependent Claim
114 words
A tire tread rubber composition as set forth in
claim 5, wherein 20 to 60 parts by weight of at least one
filler selected from the group consisting of carbon
blacks having a specific surface area by nitrogen
adsorption (N 2 SA) of 50 to 170 m 2 /g and a dibutyl
phthalate oil absorption (DBP) of 60 to 140 ml/100 g and
5 to 50 parts by weight of at least one filler selected
from the group consisting of silicas having a specific
surface area by nitrogen adsorption (N 2 SA) of 80 to 300
m 2 /g and a dibutyl phthalate oil absorption (DBP) of 100
to 300 ml/100 g are formulated.
Claim 7
Dependent Claim
114 words
A tire tread rubber composition comprising 100
parts by weight of at least one rubber selected from the
group consisting of styrene-butadiene copolymer rubbers
having a styrene content of at least 10% by weight and 60
to 100 parts by weight of at least one filler selected
from the group consisting of carbon blacks having a
specific surface area by nitrogen adsorption (N 2 SA) of 50
to 170 m 2 /g and a dibutyl phthalate oil absorption (DBP)
of 70 to 140 ml/100 g or other fillers, 5 to 50 parts by
weight of a polysiloxane according to claim 1 and/or
claim 2, and a softening agent and other rubber chemicals
formulated therein.
Claim 8
Dependent Claim
114 words
A tire tread rubber composition as set forth in
claim 7, wherein 20 to 80 parts by weight of at least one
filler selected from the group consisting of carbon
blacks having a specific surface area by nitrogen
adsorption (N 2 SA) of 50 to 170 m 2 /g and a dibutyl
phthalate oil absorption (DBP) of 70 to 140 ml/100 g and
5 to 50 parts by weight of at least one filler selected
from the group consisting of silicas having a specific
surface area by nitrogen adsorption (N 2 SA) of 80 to 300
m 2 /g and a dibutyl phthalate oil absorption (DBP) of 100
to 300 ml/100 g are formulated.
Claim 9
Dependent Claim
110 words
A rubber composition as set forth in any one of
claim 4, claim 6, or claim 8, wherein 2 to 150 parts by
weight of a silica-containing polysiloxane master batch
comprising 100 parts by weight of at least one ingredient
selected from the group consisting of polysiloxanes
having a siloxane structure of the above formulas (1) to
(3) containing 30 to 200 parts by weight of at least one
filler selected from the group consisting of silicas
having a specific surface area by nitrogen adsorption
(N 2 SA) of 80 to 300 m 2 /g and a dibutyl phthalate oil
absorption (DBP) of 100 to 300 ml/100 g is formulated.
Claim 10
Dependent Claim
110 words
A rubber composition as set forth in claim 5 or
claim 7, wherein 2 to 150 parts by weight of a carbon
black-containing polysiloxane master batch comprising 100
parts by weight of at least one ingredient selected from
the group consisting of polysiloxanes having a siloxane
structure of the above formulas (1) to (3) containing 30
to 200 parts by weight of at least one filler selected
from the group consisting of carbon blacks having a
specific surface area by nitrogen adsorption (N 2 SA) of 50
to 170 m 2 /g and a dibutyl phthalate oil absorption (DBP)
of 60 to 140 ml/100 g or other fillers is formulated.
Claim 11
Dependent Claim
183 words
A rubber composition as set forth in any one of
claim 4, claim 6, or claim 8, wherein 2 to 150 parts by
weight of a silica- and carbon black-containing
polysiloxane master batch comprising a mixture comprising
100 parts by weight of at least one ingredient selected
from the group consisting of polysiloxanes having a
siloxane structure of the above formulas (1) to (3)
containing 1 to 199 parts by weight of at least one
filler selected from the group consisting of carbon
blacks having a specific surface area by nitrogen
adsorption (N 2 SA) of 50 to 170 m 2 /g and a dibutyl
phthalate oil absorption (DBP) of 60 to 140 ml/100 g or
other fillers and 1 to 199 parts by weight of at least
one filler selected from the group consisting of silicas
having a specific surface area by nitrogen adsorption
(N 2 SA) of 80 to 300 m 2 /g and a dibutyl phthalate oil
absorption (DBP) of 100 to 300 ml/100 g, wherein the sum
of the two is 30 to 200 parts by weight, are formulated.
Claim 12
Dependent Claim
55 words
A rubber composition as set forth in claim 9 or
11, wherein 2 to 190 parts by weight of a master batch
containing 0.5 to 40% by weight, based on the silica
content contained in the silica-containing polysiloxane
master batch or silica- and carbon black-containing
polysiloxane master batch, of a silane coupling agent is
formulated.
Claim 13
Dependent Claim
55 words
A rubber composition as set forth in claim 12,
wherein 2 to 230 parts by weight of a master batch
containing 0.05 to 30% by weight, based on the silane
coupling agent content contained in the silica-containing
polysiloxane master batch or silica- and carbon black-containing
polysiloxane master batch, of a silanol
condensation catalyst is formulated.
Claim 14
Dependent Claim
40 words
A tire tread rubber composition as set forth in
any one of claims 5 to 13, wherein a silane coupling
agent is further formulated in an amount of 5 to 30% by
weight, based on the amount of silica formulated.
Claim 15
Dependent Claim
38 words
A tire tread rubber composition as set forth in
claim 14, wherein a silanol condensation catalyst is
further formulated in an amount of 0.05 to 50% by weight,
based on the amount of the silane coupling agent
formulated.
Claim 16
Dependent Claim
49 words
A siloxane-based reactive plasticizer having,
as a plasticizer ingredient, at least 50% by weight of an
organic group containing an ester group or an aliphatic
or aromatic hydrocarbon group and having as a reactive
group in a molecule at least one of an alkoxysilyl group
and an acyloxysilyl group.
Claim 17
Dependent Claim
83 words
A reactive plasticizer as set forth in claim
16, comprising a polysiloxane having in a molecule at
least one siloxane unit of the following formula (I) and
formula (II): wherein R 1 is a C 1 to C 6 alkyl group and/or C 1 to C 21 acyl
group, R 2 is a C 2 or C 3 alkylene group, R 3 is a C 5 to C 21 hydrocarbon group, and R 4 is a C 6 to C 20 hydrocarbon
group.
Claim 18
Dependent Claim
36 words
A reactive plasticizer as set forth in claim
17, wherein the R 4 in formula (II) is a group selected
from the group consisting of 1-octene, isooctene, 1-decene,
limonene, vinylcyclohexene, styrene,
divinylbenzene, α-methylstyrene, and α-methylstyrene
dimer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.