Leveraging sustainability while improving performance
Kuraray Liquid Rubber
Kuraray Liquid Rubber for long lasting product solutions
Kuraray Liquid Rubber functions as ˝reactive plasticizers˝, they help reduce Mooney viscosity and facilitate the mixing process.
Features � Transparent � Colorless � Odorless � Low VOCs
Types � Liquid Butadiene Rubber (L-BR) � Liquid Isoprene Rubber (L-IR)
� Liquid Styrene-Butadiene Rubber (L-SBR) � Functionalized: carboxylated, UV-curable, graft silane � Bio-based: Liquid Farnesene Rubber (L-FR)
Tires
Rubber goods
Adhesives
Automotive sealants
� Kuraray Liquid Rubber 1
Kuraray Liquid Rubber beyond a reactive plasticizer
MW
NR, SBR
Rubber
1,000,000
100,000
Benefits: � Plasticizing effect � Enhanced properties � Improved final product shelf-life
Kuraray Liquid Rubber
10,000
1,000
Process Oil Liquid Polybutene
Plasticizer
100
0 Depending on molecular weight (MW), Kuraray Liquid Rubber can act as rubber replacement or a reactive plasticizer.
Bleeding
Benefits: � Co-vulcanizable with solid rubber � Significant reduction in migration � Reduces processing time
Process Oil
Cross link point
Kuraray Liquid Rubber
Kuraray Liquid Rubber is cross-linkable with base rubber and acts like a process oil, but does not bleed.
Significant performance and environmental advantages with Kuraray Liquid Rubber
Mooney, Electric (Index)
Benefits: � Reduces electric power consumption � Lower processing cost � Better sustainability performance (less energy)
110
Mooney Viscosity (130˚C) Electricity consumption
105
100
Dynamic viscoelasticity/CB Dispersion Dynamic viscoelasticity/CB Dispersion
95
25
6
90
24
5
85
23
4
80
22
3
0
5
10
15
L-IR-50 Parts
21
2
Formulation NR (STR20) 100 - 85, L-IR-50 0 - 15, CB (N330) 70, TDAE 5, Vulcanization, Antioxidant ZnO (5), Stearic Acid (2), AO 6C (1), AO RD (1), Phenol resion (10), HDOT20 (4), Accelerator NS (1.7), HMT (1)
Carbon black dispersion Method: ISO11345-C
20
1
L-IR-50 parts 0 5 10 15
2 Kuraray Liquid Rubber �
Number of functional groups per molecule
Category
Type
Grade name Structure
L-IR (Isoprene)
Homopolymer
L-IR-30
-
C CH
n
L-IR-50
-
Block Copolymer
L-IR-390
-
CH CH
C CH
n
m
Carboxylated
C CH
C CH CH
L-IR-403
3
m
n
O
O
O
C CH
C CH CH HC O C HO
L-IR-410
10
m
n
C O
O
UV Curable
UC-102M
2
C CH
C CH CH HC O C HO
n
m
O O C
C O
O
UC-203M
3
L-BR-302
L-BR (Butadiene)
Homopolymer
L-BR-307
-
CH CH
n
L-BR-305
L-BR-352
-
CH CH
CH CH
m
n
L-BR-361
-
OEt
GS-L-BR (Graft silane)
OEt
EtO
Si
GS-L-BR -114*
2
OEt Si OEt
EtO
L-SBR (Styrene/ Butadiene)
Random Copolymer
L-SBR-870*
-
CH CH
CH
CH CH
L-SBR-822*
-
n
m
l
L-SBR-841N*
-
L-FR (Farnesene)
Homopolymer
n
L-FR-107L
-
Random Copolymer
m
n
L-FBR-742
-
L-FBR-746
-
*Developmental grades
� Kuraray Liquid Rubber 3
Molecular Weight
Viscosity (Pa•s at 38°C)
Glass Transition Temp. (°C)
Features and main applications
▪ Reactive plasticizer (NR, IR, SBR, BR, IIR etc.) ▪ Tire, conveyor belt, rubber goods ▪ Pressure sensitive adhesives/hot melts ▪ Automotive sealants, coatings and adhesives ▪ Plasticizer for printing plates ▪ Binder for brake pads, grinding wheels, etc.
28,000
70
-63
54,000
500
-63
▪ Hot melt adhesives/PSA (SIS, SBS, EVA) ▪ Automotive sealants, coatings and adhesives
48,000
400
-95
34,000
200
-60
▪ Improves adhesion to metals and fibers ▪ Automotive sealants, coatings and adhesives ▪ Hot melt adhesives/PSA (SIS, SBS, EVA) ▪ Binder for brake pads, grinding wheels, etc.
30,000
430
-59
17,000
30
-60
▪ Low temperature reactivity ▪ Crosslinkable using UV ▪ Pressure sensitive adhesives (UV curing adhesives)
35,000
190
-60
5,500
0.6
-85
▪ Reactive plasticizer (NR, IR, SBR, BR etc.) ▪ Tire, printing plate ▪ Coagent for EPDM (peroxide curing) ▪ Automotive sealants, coatings and adhesives ▪ Hot melt/PSA ▪ Vinyl content: 5-70% ▪ Thermoset PU modification
8,000
1.5
-95
26,000
40
-95
9,000
6
-60
5,500
5.5
-49
▪ Tires, truck and bus tires and rubber goods ▪ Improve silica-polymer interaction ▪ Improve silica dispersion
6,000
6
-50
▪ Good compatibility with S-SBR and E-SBR ▪ Tires, ultra-high-performance (UHP) tires and rubber goods
6,000
250
-18
▪ Automotive sealants, coatings and adhesives ▪ Partially hydrogenated grades are available ▪ Damping ▪ Flexo printing plates
8,800
8.3
-60
10,000
100 (at 60˚C)
-6
130,000
70
-70
▪ Tire, rubber goods, adhesives and sealants ▪ Bio-based ▪ Significant GHG reduction
30,000
15
-78
100,000
520
-78
4 Kuraray Liquid Rubber �
With liquid farnesene rubber, Kuraray is expanding its portfolio of liquid rubbers with a product based on natural and renewable raw materials. As an additive in rubber compounds, liquid farnesene rubber gives them high plasticity. The material also retains excellent flexibility at low temperatures and improves ice grip while preventing the rubber compounds from hardening over time, making it ideal for use in winter tires. Liquid Farnesene Rubber Sustainability and performance side-by-side
� Kuraray Liquid Rubber 5
Applications*: � Tires � Rubber goods � Footwear � Adhesives, sealant and coatings
Benefits: � Renewable monomer
Renewable monomer Low viscosity High reactivity
� Low viscosity � High reactivity
Sugarcane
Branched Structure
Reactive site
: Double bond
β -Farnesene
Liquid farnesene rubber: Branched polymer
Less entanglement between molecules because of highly branched structure
High Mw and Low viscosity
*For certain applications, liquid farnesene rubber cannot be introduced due to raw material supply relations. Please contact our sales representatives.
6 Kuraray Liquid Rubber �
Curability of liquid rubbers changes when curing agent is changed.
Sulfur cure 2)
Peroxide cure 3)
Crosslinked
Crosslinked
1,E+07
1,E+07
1,E+05
1,E+05
1,E+03
1,E+03
1,E+01
1,E+01
1,E-01
1,E-01
Uncrosslinked paste
Uncrosslinked paste
*Not cured in this formulation
*Not cured in this formulation
1,E-03
1,E-03
60
60
0
0
10 20 30 40 50 Time/min.
10 20 30 40 50 Time/min.
L-FR-107L
L-FBR-746
1,2-L-BR
1,4-L-BR
L-FR/L-FBR show fast crosslinking with both sulfur and PO.
2) Formulation Liquid Rubber 100, ZnO 2, SA 1, AO 1, S 3, DM 1.5, DT 0.5
3) Formulation
Liquid Rubber 100, PO 1
� Kuraray Liquid Rubber 7
GHG emission index of Kuraray Liquid Rubber
100
80
Up to 108% reduction in greenhouse gas emissions*
60
40
20
0
Principles & Frameworks � ISO14040:2006 and ISO14044:2006
-20 L-IR-50 L-BR-307 L-FR-107L L-FBR-746 L-FBR-742 Kuraray Liquid Rubber Liquid Farnesene Rubber
� Lifecycle Inventory database: IDEA (Inventory Database for Environmental Analyses) version 2.3 � LCIA model: IPCC AR5 100a System Boundaries � Cradle to gate � Biogenic carbon absorption is included � Incineration and transportation to customer sites are not included
Assumptions and Limitations: For detailed information on assumptions and limitations, please contact our sales representatives.
8 Kuraray Liquid Rubber �
Kuraray Liquid Rubber in tires
Benefits: � Improves grip performance (ice, wet and dry)
Three key parameters determine tire performance: grip, fuel efficiency and durability. Kuraray Liquid Rubber offers advantages for tire geometry, dynamic tire properties, heat generation and processability. Kuraray Liquid Rubber functions as reactive plasticizers but have far higher molecular weight than normal plasticizers, that reduces bleeding and soiling of molds.
� Improves rolling resistance � Improves abrasion resistance � Low migration � Improves filler dispersion
4
1
Beadfiller/APEX: � High hardness with excellent processability � Improved dimensional stability � Better filler dispersion � Improve green tack Applicable grades: L-IR-50 Side wall / Carcass: � Improved dimensional stability � Enhanced surface smoothness of calendered sheet � Lower mill shrinkage � Better green tackiness � Higher production rates Applicable grades: L-IR-50, L-BR-302, L-BR-307 Rim cushion: � Good balance of processability and physical properties � Improved abrasion resistance Applicable grades: L-IR-50
Tread: � Improved dynamic and physical proterties (tan δ ) � Excellent abrasion resistance, wet and ice grip � Excellent extrudability Applicable grades: L-IR-50, L-BR-302, L-BR-307, L-SBR-870, L-SBR-841N, L-FR-107L, L-FBR-742, L-FBR-746, GS-L-BR-114 Cushion: � Enhanced surface smoothness of calendered sheet � Reduced extrusion temperature � Better green tackiness � Improvement of dynamic properties Applicable grades: L-IR-50, L-BR-302, L-BR-307
2
5
3
4
5
1
3
2
� Kuraray Liquid Rubber 9
Silane-modified GS-L-BR
Features � Improves silica dispersion � Crosslinkable with rubber base � High reactivity with silica � Improves silica-polymer interaction � Lower silica-silica interaction
Silane coupling agents are used in silica-filled rubber compounds to increase filler-polymer interactions and lower the filler-filler interactions. In addition, silane functionalized low molecular weight ‘liquid’ polymers can be used. Our silane-modified GS-L-BR is one of the latest development of functionalized liquid rubber grades.
What is the function of GS-L-BR in rubber compounds?
Crosslink
Solid rubber
Expectation � Good silica dispersion � Improved abrasion resistance � Low tan δ
Silica
GS-L-BR
enhanced fuel economy
Vulcanization
Formulation & mixing conditions
Control
Formulation
Mixing Conditions
NP1
Banbury-type mixer
S-SBR
80
80
0'00" 0'20" 5'30"
Solid rubber (60˚C)
BR
20
20
Filler, SCA, Oil, LR, AO, ZnO, Stearic acid
TDAE
40
30
Dump out (150-160˚C)
Kuraray liquid rubber
-
10
NP2
Banbury-type mixer
Silica
100
100
0'00" 4'30"
First mixed compound (90˚C)
SCA (Si-75)
8.0
8.0
Dump out (150-160˚C)
ZnO
3.0
3.0
FM
Banbury-type mixer
Stearic Acid
2.5
2.5
0'00" 0'75"
Compound, S, Accelerator (50˚C)
Anti oxidant 6C
2.5
2.5
Dump out (90-100˚C)
Wax
2.0
2.0
OT-20
1.9
1.9
Accelerator DPG
0.5
0.5
Summary Feature of GS-L-BR-114 � Better rolling resistance and silica dispersion than L-BR � Better abrasion
Accelerator CBS
3.5
3.5
Accelerator TBTD
1.5
1.5
Abrasion resistance
Structure & typical properties of GS-L-BR
120
GS-L-BR-114 TDAE (control)
Tg (˚C)
Number of functional group / chain
Structure
Mw
Development code
100
and wet grip performance
Graft functionalized
GS-L-BR-114*
6,000 -50
2
80
Non-functionalized
Rolling resistance @60˚C
Wet grip
5,500 -49
none
L-BR
60
*Only for the research purpose.
GS-L-BR is superior in terms of well-balanced properties.
Silica dispersion
10 Kuraray Liquid Rubber �
Kuraray Liquid Rubber in automotive sealants
For automotive adhesives, grades of Kuraray Liquid Rubber, which are high-viscosity synthetic rubbers, offer different functionalities: improving adhesion to metal surfaces while tailoring damping performance.
In addition, Kuraray Liquid Rubber improves adhesion to oily surfaces and is used where low-temperature performance and quick curing are required. With liquid farnesene rubber, Kuraray even offers a bio-based alternative for automotive sealants.
Benefits: � Bio-based material
Applications: � Mastic sealant � Foam sealant � Anti-flutter
� High reactivity - curable with both sulfur and peroxide � Good low temperature properties thanks to low Tg � Provides damping properties over a wide temperature range combined with high Tg liquid rubber � Foams with fine cells
� Kuraray Liquid Rubber 11
Automotive applications and benefits
Grade
Applications
Benefits
▪ Cold temperature properties ▪ Ip/Bd structure provides good crack resistance, better damping performance, good compatibility with BR, hydrocarbon and rosin resins ▪ Good solubility in aliphatic, aromatics and ethers ▪ High reactivity due to Ip/Bd structure ▪ Improves expansion in foams ▪ Improves heat and abrasion resistance
▪ Sealants ▪ Sprayable/foam-able sealants ▪ Anti-flutter adhesives ▪ Oil replacement
L-IR-390
▪ Good bonding to wide variety of substrates ▪ Joining of dissimilar materials ▪ Improved adhesion to oily surfaces ▪ Softness ▪ Higher Mw helps prevent sagging
▪ Spot welding sealants ▪ Anti-flutter adhesives ▪ Flexibility improver for Multi-substrate bonding
L-IR-403 L-IR-410
▪ Better processability and reactivity in mastic sealants (BR, SBR, IR) ▪ No migration ▪ Compatible with a broad range of vegetable oils ▪ Higher Mw helps prevent sagging
▪ Mastic sealants ▪ Extrudable rubber-based patches ▪ Oil replacement ▪ Underbody coatings
L-IR-30 L-IR-50
▪ Sprayable/foam-able sealants ▪ Spot welding sealants ▪ High damping foams and acoustic baffles (LASD)
▪ Excellent sound and vibration damping ▪ High tan δ over a wide temperature range ▪ Improves reactivity ▪ Improves expansion in foams
L-SBR
Promote adhesion to metal: L-IR-403 & L-IR-410
L-IR-30
L-IR-403
Shear strength test
Al Plate
Steel Plate
Shear strength test
Al Plate
Steel Plate
Max load (N)
Max load (N)
82
77
721
650
Elongation (mm)
Elongation (mm)
1.8
0.9
4.4
4.1
Adhesion failure
Cohesion failure
Shear stress
Shear stress
Adhesion area: 25 mm x 25 mm
12 Kuraray Liquid Rubber �
Kuraray Liquid Rubber in adhesives
Kuraray Liquid Rubber is commonly used in applications such as pressure sensitive adhesives and hot melts. The lower molecular weight grades improve tack and adhesive properties. The UV crosslinkable grades provide excellent flexibility, tack, low shrinkage and moisture resistance, which are ideal for flexible electronic applications.
Benefits: � Preservation of rubber-like properties at low temperatures � Colorless, transparent, odorless without halogen residuals � Certain grades are suitable for food contact applications � Improved adhesion to metal and glass possible with functionalized grades � Crosslinkable by UV with methacrylic grades
� Kuraray Liquid Rubber 13
Solvent
L-IR-30, 50
L-IR-410
Solubility of L-IR Hexane, Heptane, Cyclohexane
A
A
Toluene, Xylene
A
A
Methyl Acetate
C
C
Ethyl Acetate
C
A
n-Butyl Acetate
A
A
Acetone
C
C
MEK
C
A
MIPK
B
A
MIBK
A
A
Methanol, Ethanol
C
C
Chloroform
A
A
Polymer content: 20 wt% at 25˚C A: Soluble B: Partially soluble C: Insoluble
Carbon Tetrachloride
A
A
Carbon Disulfide
A
A
Cyclohexanone/Xylene (50/50 wt/wt)
A
A
UV Crosslinking system for UC-102M
100 90 80 70 60 50 40 30 20 10 0
UC-102M/NDDA=50/50 UC-102M/NDDA=75/25 UC-102M/NDDA=100/0
0
5
10
UV irradiation (pass)
Lamp: High pressure mercuray lamp Curing conditions: Light intensity : 40 mW/cm 2 , Conveyor speed : 2 m/ min, 1 Pass = 188 mJ/cm 2 Thickness: 0.8 mm Gel fraction test: Toluene extraction at 25˚C for 24 hours
Adding value to your products–worldwide
Frankfurt, Germany
Tokyo, Japan
Houston, Texas, USA
Shanghai, China
New Delhi, India
São Paulo, Brasil
Kuraray is a world leader in specialty chemicals and functional materials. We are committed to developing products that ensure quality and value while helping our customers differentiate themselves from their competition. Kuraray's Elastomer Division started in 1972 with the production of polyisoprene rubber and the development of new rubber materials based on Isoprene in the Kashima Plant. From the first
production line, the Elastomer Division continuously grew and invented new products such as KURARAY LIQUID RUBBER, ISOBAM TM , SEPTON TM , HYBRAR TM , and KURARITY TM . Kuraray strives to develop new and innovative high- performance products for customers around the globe. Learn more about Kuraray's Elastomer products, visit elastomer.kuraray.com.
Kuraray America, Inc. 3700 Bay Area Blvd., Suite 680 Houston, Texas 77058 United States of America P 1.800.423.9762 � septon.sales@kuraray.com Kuraray South America Ltda. Av. Paulista, 1636 - Sala 405 01310-200 Sao Paulo, Brasil P +55-11-2615-3531 � elastomer.sa@kuraray.com
Kuraray Europe GmbH Philipp-Reis-Straße 4 65795 Hattersheim am Main Germany P +49 69 305 85300 � elastomer@kuraray.com
Kuraray Co., Ltd. Tokiwabashi Tower 2-6-4, Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan P +81 3 6701 1616 � kuraray.liquidrubber@kuraray.com Kuraray Trading (Shanghai) Co., Ltd. 3 Hongqiao Road, Xuhui District Shanghai 200030, China P +86 21 6407 9182 � elastomer.china@kuraray.com
Kuraray India Private Limited Prius Platinum 2nd Floor B Wing,
D3 District Centre Saket New Delhi -110017, India P +91-11-4090-4400 � inquiry.kid@kuraray.com
Disclaimer: The information provided herein corresponds to Kuraray’s knowledge on the subject at the date of its publication. This information may be subject to revision as new knowledge and experience becomes available. The information provided falls within the normal range of product properties and relates only to the specific material designated; this data may not be valid for such material used in combination with any other materials or additives or in any process, unless expressly indicated otherwise. The data provided should not be used to establish specification limits or used alone as the basis of design; they are not intended to substitute for any testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Final determination of suitability of any material or process and whether there is any infringement of patents is the sole responsibility of the user. Since Kuraray cannot anticipate all variations in actual end-use conditions, Kuraray makes no warranties and assumes no liability in connection with any use of this information. © Kuraray Co., Ltd. 2023 SEPTON, HYBRAR, KURARITY and ISOBAM are trademarks or registered trademarks of Kuraray Co., Ltd. Trademarks may not be applied for or registered in all countries.
02/2023 For the latest information visit: elastomer.kuraray.com
Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16Made with FlippingBook - Online Brochure Maker