Technical updates on S-SBR/Nd-PBR

Dr. Thomas Gross

Head of Technical Marketing & Product Development,

Performance Butadiene Rubbers business unit, LANXESS

Shanghai, September 6, 2012

LANXESS supports global initiatives by focusing on technological progress for “greener” tires

Focusing on total technological progress based on Nd-PBR and S-SBR

Performance boost through projects

targeting the (ultra) high performance

segment (“differentiation”)

Performance proliferation

through projects targeting

high-volume tire

applications globally

already possible today

due to LANXESS’

technology and application

knowledge Perf

orm

an

ce

Buna® CB21 is an ultra high molecular Nd-PBR grade with

The lowest number of free polymer chain ends

The lowest energy dissipation / hysteresis and

Superior abrasion resistance

Example 1: Usage of specifically high molecular weighted Nd-PBR

Enhanced compound properties

Compound test results of high cis BR grades

0,12

0,14

0,16

0,18

0,20

56 58 60 62 64 66 68

Rebound at 60°C

MT

S

Max

imu

m t

an

De

lta

NiBR - 1

NiBR - 2

NiBR - 3

BUNA® CB 1220

BUNA® CB 1203

BUNA® CB Nd40

BUNA® CB 24

BUNA® CB Nd60

BUNA® CB 22

BUNA® CB 21

Low Mooney

High Mooney

BUNA® CB 25

BUNA® CB 24

BUNA® CB 22

Example 1: Applying a suited modification technology such as PBR 4076

Improved processing behavior can be combined with very good compound properties results

BUNA® CB 25

BUNA® CB 24 BUNA® CB 22

BUNA® PBR 4076

BUNA® PBR 4076

Modification

Polymer Mooney

yes

no

BUNA® CB 24 BUNA® CB 25

BUNA® PBR 4076 BUNA® CB 22

70 phr BR / 30 phr NR / Carbon Black

80

90

100

110

120

130

140

ML

(Com

pound)

Shore

A a

t 23°C

Te

nsile

S

trength

300

Rebound a

t 60°C

Eple

xor

tanD

at

60°C

MT

S tanD

m

ax a

t 60

°C

Abra

sio

n

middle high

Example 2: Alignment of S-SBR processes and structures over several PBR sites

* formerly PBR 4050; ** formerly PBR 4051; *** formerly PBR 4054

S-SBR portfolio – oil extended grades

Grade

Buna®

Mooney

[MU]

Vinyl

[%]

Styrene

[%]

Tg

[°C]

Type of Oil

[37,5 phr]

Plant

VSL 5025-2

PBR 4013

VSL 4526-2*

47

51

50

50

50

44,5

25

25

26

-29

~- 29

-30

TDAE

Ny 8450

TDAE

Port-Jérôme

Port-Jérôme

Port-Jérôme

VSL 5025-2 HM

VSL 4526-2 HM**

PBR 4042

VSL 4526-2 HM***

62

62

62

62

50

44,5

~44

44,5

25

26

25

26

-29

-30

-30

-30

TDAE

TDAE

Ny 5450

TDAE

Port-Jérôme

Port-Jérôme

Cabo

Orange

VSL 5228-2 50 52 28 -20 TDAE Port-Jérôme

VSL 2538-2 50 25 38 -31 TDEA Port-Jérôme

VSL 2438-2 HM

PBR 4055

PBR 4058

PBR 4014

80

80

80

75

24

~29

~29

29

38

38

38

37

-31

~-26

~-26

-28

TDEA

TDEA

TDEA

TDEA

Port-Jérôme

Orange

Port-Jérôme

Port-Jérôme

SL 4518-3 45 9 18 -69 Ny 5450 Cabo

Alignment enables multiple PRR site approvals for a global supply situation of S-SBRs

* formerly PBR 4050; ** formerly PBR 4051; *** formerly PBR 4054

S-SBR portfolio – oil extended grades

Grade

Buna®

Mooney

[MU]

Vinyl

[%]

Styrene

[%]

Tg

[°C]

Type of Oil

[37,5 phr]

Plant

VSL 5025-2

PBR 4013

VSL 4526-2*

47

51

50

50

50

44,5

25

25

26

-29

~- 29

-30

TDAE

Ny 8450

TDAE

Port-Jérôme

Port-Jérôme

Port-Jérôme

VSL 5025-2 HM

VSL 4526-2 HM**

PBR 4042

VSL 4526-2 HM***

62

62

62

62

50

44,5

~44

44,5

25

26

25

26

-29

-30

-30

-30

TDAE

TDAE

Ny 5450

TDAE

Port-Jérôme

Port-Jérôme

Cabo

Orange

VSL 5228-2 50 52 28 -20 TDAE Port-Jérôme

VSL 2538-2 50 25 38 -31 TDEA Port-Jérôme

VSL 2438-2 HM

PBR 4055

PBR 4058

PBR 4014

80

80

80

75

24

~29

~29

29

38

38

38

37

-31

~-26

~-26

-28

TDEA

TDEA

TDEA

TDEA

Port-Jérôme

Orange

Port-Jérôme

Port-Jérôme

SL 4518-3 45 9 18 -69 Ny 5450 Cabo

Conventional chain termination reagent: acidic compounds*

Li+-

“living“, anionic chain end unfunctionalized polymer chain

Functionalization by use of cyclosiloxane**

“living“, anionic chain end

Si

OSi

O

SiOLi

+-

Functional polymer chain end from termination reagent can interact with Silica filler surface to reduce filler-filler interaction

Si O Si O Si OH

H2O

Example 3: Higher performance of continuously produced S-SBR by chain-end functionalization

Chain-end functionalization using functional chain termination reagent

* e.g. water ** among others

PBR 4070 (high styrene, oil extended S-SBR)

tan d (0°C)

tan d (60°C)

tan d max.(MTS)

rebound (60°C)

Result: Improved performance levels

VSL 2438- 2 HM

PBR 4070 unfunct.

PBR 4070 fct.

PBR 4055 PBR 4014

80

90

100

110

120

Rela

tive

pe

rfo

rman

ce [

%]

Properties of a

silica tire tread

compound:

– 70 phr S-SBR

– 30 phr Nd-PBR

– 90 phr Silica

A high vinyl version

is already produced

in Port-Jérôme and

currently compound

investigations

running (PBR 4078)

Cabo de Santo Agostinho

Example 4: Accurately conducted functionalization at the Cabo site…

…for tailor made batch S-SBR grades

Solvent

Butadiene

Styrene

Modifier

Initiator

Coupling

Functionalization

Short-Stop

Final Step Initial Step

Tailor-made batch S-SBR grades in the case of PBR 4060 and PBR 4057

Significant improvement in the classification of the EU labeling

Original virgins 8.3 & 7.9 kg Retreaded ~ 8.5 kg (+2.5%)

6.5

7

7.5

8

8.5

9

9.5

10

5025-0 HM PBR 4041 5025-2 5025-2HM PBR 4031 PBR 4057 PBR 4060 European green tire

New version

RRc kg/ton

6.0 mm

all treads are 7.8 mm thick

E

B

Standard S-SBRs Fxt S-SBRs

Due to Fxt S-SBRs

TÜV RRc results from own retreading tire tests: 80/20phr : S-SBR/CB25; 85phr silica; 35.8phr TDAE

C

Performance proliferation through projects targeting high-volume tire applications globally

Focusing on total technological progress based on Nd-PBR and S-SBR

LANXESS supports global initiatives by focusing on technological progress for “greener” tires

Performance boost through projects

targeting the (ultra) high performance

segment (“differentiation”)

Perf

orm

an

ce

Example 2 & 3: To offer “standard”

S-SBRs on a global basis

Chain-end effect of continuously produced S-SBR

Effect of LANXESS high-end rubbers in treads

Durability Wet Grip

Nd-PBR

General

Purpose

Rubber

Rolling resistance

reduction

Nd-PBR & S-SBR

Example 1 & 4:

Tailormade S-SBR

High molecular

weighted Nd-PBR

LANXESS Business Unit Performance Butadiene Rubbers – enabling “Green Mobility”

Excellent

offering

Global

footprint

Quality

growth

Megatrends generate underlying

growth

Materials to determine top tire

performance

BU PBR enables quality growth in all

regions

Raw materials are a regional matter,

but centrally managed

BU PBR provides superior added

value to customers

Unmatched rubber expertise