wacker: over 100 years of success...electrically conductive ‘liquid’ silicone rubber 13,04 13,04...

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Introduction to Liquid Silicone Rubber on MAT’DAYMr, Yann Procureur RUBBER SOLUTIONS, 21 Mars 2019 0

CREATING TOMORROW`S SOLUTIONS

WACKER:

Over 100 Years of Success

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Disclaimer

The information contained in this presentation is for background purposes only and is subject to

amendment, revision and updating. Certain statements and information contained in this presentation

may relate to future expectations and other forward-looking statements that are based on management's

current views and assumptions and involve known and unknown risks and uncertainties. In addition to

statements which are forward-looking by reason of context, including without limitation, statements

referring to risk limitations, operational profitability, financial strength, performance targets, profitable

growth opportunities, and risk adequate pricing, as well as the words “may, will, should, expects, plans,

intends, anticipates, believes, estimates, predicts, or continue”, “potential, future, or further”, and similar

expressions identify forward-looking statements. By their nature, forward-looking statements involve a

number of risks, uncertainties and assumptions which could cause actual results or events to differ

materially from those expressed or implied by the forward-looking statements. These include, among

other factors, changing business or other market conditions and the prospects for growth anticipated by

the Company's management. These and other factors could adversely affect the outcome and financial

effects of the plans and events described herein. Statements contained in this presentation regarding

past trends or activities should not be taken as a representation that such trends or activities will

continue in the future. The Company does not undertake any obligation to update or revise any

statements contained in this presentation, whether as a result of new information, future events or

otherwise. In particular, you should not place undue reliance on forward-looking statements, which

speak only as of the date of this presentation.

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WACKER:

A Well-Balanced Portfolio

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WACKER:

Highly-Integrated Operations Based on Five Key Raw Materials

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WACKER:

Products and Solutions for Key Global Industries

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WACKER:

Our R&D Pipeline Covers a Diverse Range of Applications

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Introduction to Liquid Silicone Rubber (LSR)

Fundamentals & General properties

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Agenda

Silicones and Silicone elastomers

Liquid silicone rubber

Processing of LSR

Properties

LSR Product portfolio

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What are Silicones?

Quartz Silicon metal Silane Polydimethylsiloxane

R

R RR

Si

R R

Si

R

R

R

R

R R

Si SiSiO O O

Generic name for a class of synthetic polymers with Si-O links made from

silicon metal

3-dimensionally crosslinked polysiloxane polymers (network-like structure)

Elastomeric, rubber-like polymers with a combination of very unique properties

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Your Day Starts with Silicones…

HDK® BELSIL®

ELASTOSIL®

WACKER® TS

WETSOFT®

SILFOAM®

WACKER® FC

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Agenda



Processing of LSR

Properties


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Polymer and silica are similar

Essential Raw Materials of Silicone Elastomers

Structural similarity of silicone polymer and silica filler

(Si-O) and low particle size of primary particles

translucent

R R

Si

R

R

R

R

R R

Si SiSiO O O

SiO2

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Agenda



Processing of LSR

Properties


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Liquid Silicone Rubber

Processing of ELASTOSIL® LR

Processing advantages

Fully automated processing

Mold with up to 128 cavities

Short cycle times

(3 - 5 seconds per 1 mm of thickness)

No waste in cold runner technology (since 1990)

No mechanical finishing necessary

Realization of complex geometries (thin wall thickness with long flow distance,

demolding of undercuts)

Combination of hard and soft materials

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Agenda



Processing of LSR

Properties


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Chemical properties

Very good weathering, UV and ageing resistance

Good media resistance against a variety of solvents and chemicals

Sterilization resistance for single and multiple use

Chemical and Physical Properties of Silicone Elastomers

Physical properties

Thermal stability up to 180 °C, with heat stabilizers up to 300 °C

Low temperature flexibility down to -50 °C (Tg = -125 °C)

Low compression set and permanent sealing

Hydrophobicity, low surface tension

High transparency or Pigmentable in nearly every color

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Regulatory Compliances Revelant with Silicone Elastomers

Pharmaceutical applications

European Pharmacopoeia 3.1.9

‘Silicone elastomers for closures

and tubing’

Others

Free of phthalates and other organic

softeners (EU directive 2007/19/EC)

Free of nitrosamines

(EU directive 93/11/EEC)

Free of latex and plant proteins, animal-

derived products, organic stabilizers

Food contact

FDA CFR 21 § 177.2600

“Rubber articles intended for

repeated use”

BfR XV. Silicone, section III.

Silicone elastomers

Biocompatibility

United States Pharmacopoeia

“Biological reactivity tests,

In vivo”, Class VI

ISO 10993 “Biological Evaluation

of Medical devices”

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Agenda



Processing of LSR

Properties


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WACKER's LSR Portfolio includes more than 200 products in the

hardness range of 3 - 90 Shore A

General purpose

High tear

Media resistant

Flame retardant

Heat resistant

Oil bleeding

Low friction

Low comp. set

Steam resistant

High damping

Crystal clear

Self-adhesive

Electrically conductive

‘Liquid’ Silicone Rubber

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ELASTOSIL® AUX color pastes FL

are bringing color and improved thermal resistance

ELASTOSIL® COLOR PASTES FL that can be used as heat stabilizers

1014

3013

9005

2001

IVORY 1014

RED-BROWN 2001

RED IRON OXIDE 3013

DEEP BLACK 9005

BLACK 9005 F

Recommendation for long-term applications

in hot air at T > 160 °C

Typical dosing 2 %

Improvement of compression set

9005 F

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Liquid Silicone Rubber (LSR)

Self-adhesive LSR to realize Hard-soft Composites

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Preamble

Multi-component parts have become increasingly important in recent years.

Whether it is in the automotive, sanitary, medical or domestic sectors,

composite systems are standing for innovative products and economically

efficient production.

Multi-component injection molding and In-mold assembly are opening up new

horizons for the processing of materials.

Processes like “Sequential molding, Overmolding, Co-Injection (Sandwich

molding), In-mold fitting of seal and gaskets, Component manufacturing,……”

broaden the possible scope for creative design and versatility of function and

application.

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Current technologies

Current Hard-soft Composites technologies

Drawbacks of technologies

Ambitious design

Not suitable for complex geometries

Additional processing steps

Solvents included

Expensive equipment

Time-limited activation of the surface

Primer

Surface treatment

Undercuts

SiliconeSubstrate

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Why Success story of Self-adhesive LSR is moving forward … ?

New trends and opportunities with

Hard-soft Composites

Downsizing requires

Weight reduction

Material saving

One part reducing assembly steps

Integrating new functionalities (Sealing, insulating & shielding)

Opening new design conception and

geometries (long flow distance, demolding of undercuts)

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npc low C.S. = Non post-cured low compression set

ELASTOSIL® LR 3x7y product portfolio

Product overview Self-adhesive grades

ELASTOSIL® Hardness Properties Applications

LR 3070 10-60Technical grades for

adhesion on PBT, PAGaskets, multi-functional seals

LR 3071 30-60Food contact

(FDA, BfR, KTW)Aerators, shower heads

LR 3072 30-50 Oil bleeding Radial seals

LR 3074 60 Coolant resistant Radiator seals

LR 3076 50+70 Oil resistant Automotive gaskets

LR 3170 40Flame retardant

(UL V-0)Flame resistant gaskets

SILPURAN®

670040-60

Medical grades for

adhesion on PBT, PA,

ISO 10993, USP class

VI, biocompatible

Sleep apnea mask

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Direct bonding

Self-adhesion is the most efficient technique for the production

of two component parts

Benefits self-adhesion technology

Adhesion to silicone elastomers,

plastics, metals and glass

No undercuts, no primer needed

No solvents

Join and seal in one step

Suitable for various designs

One-step process (adhesion during

cure)

High degree of automation, no

assembly

(2K injection molding)

Silicone

Substrate

Bonding agent

Silicone

Substrate

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Processing of adhesion occurs by chemistry

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Adhesion promotors react at the surface to create new

molecules

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Self-adhesive LSR grades of WACKER know a lot of suitable

bonding partners

PEEK

LCP

PEI PES (PPS)

PC PET PBT

PMMA ABS PA POM

PS PP

SAN PVC PE-HD PE-LD

good adhesion

no “direct bonding”

Engineering plastics

Commodities

High performance plastics

Self-adhesive technology

invented by WACKER

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Two-component injection molding Adhesion test according to

DIN ISO 813

Substrate

Silicone rubber

Cohesive

failure (R)

Adhesive

failure (D)

Adhesion performance of Self-adhesive LSR

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Substrate General Adhesion

performance

Substrate General Adhesion

performance

PA 6 +++ PES ---

PA 6.6 +++ PEI ---

PA 12 ++ PE / PP ---

PA 6.12 + PPE ++

PBT +++ PPS -

PET +++ PSU ---

PC --- VMQ ++

PEEK ++ PMMA ---

Adhesion performance strongly depends on the chemical nature

of the substrates and surface functionality

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Requirements for reliable 2 component part

High melting point of substrate in case of

thermoplastics

Compatibility of silicone rubber and

thermoplastic, i.e. no inhibition of LSR

(platinum poisons)

Clean glass and metal surfaces

wacker

BOND

The selection of a suitable Bonding Partner at the Beginning of a

project is very important

Link to self-adhesive LSR homepage and bonding data base

http://www.wacker.com/cms/en/products-markets/self-adhesive-lsr/lsr/lsr-login.jsp

http://www.wacker.com/cms/en/products-markets/self-adhesive-lsr/lsr/lsr-login.jsp

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LR 3003/40 to

MAKROLON® 2405

LR 3070/40 to

MAKROLON® 2405

LR 3071/40 to

MAKROLON® 2405

Adhesion to Polycarbonate of ELASTOSIL® LR 3070 and LR 3071

can be achieved by use of specific pre-treatment methods

0

2

4

6

8

10

12

w/o Pyrosil Plasma

0

2

4

6

8

10

12

w/o Pyrosil Plasma

0

2

4

6

8

10

12

w/o Pyrosil Plasma

Peeling force / N/mmPeeling force / N/mmPeeling force / N/mm

PC: 4 h @ 100 °C

NPC

no adhesion no adhesion no adhesion

Adhesion test as per DIN ISO 813:

D = Adhesive failure

R = Cohesive failure

R R

R

RD RD

R

R RD

D

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Self-adhesive ELASTOSIL® LR

Applications with Self-adhesive LSR grades

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Upper image: courtesy of Rosenberger Hochfrequenztechnik GmbH & Co. KG

Hybrid, Electric and Fuel Cell Vehicles Require Challenging

High Voltage System Component Solutions

ELASTOSIL® Grades of Choice LR 384x (oil bleeding)

LR 3065 (low COF)

LR 3070 (self-adhesive)

HV Connecting and Contact Systems System Requirements

High voltage electrical insulation

Very reliable sealing performance

Heat resistance & low temp. flexibility

Shielded cables and connectors

→ LSR processing advantages

→ Silicone elastomers for long

operating lifetime

High voltage

singe wire seals

Self-adhesive LSR:

Adhesion ensures

reliable sealing

performance

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Useful link at hptt/….

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Thank You for Your Attention.

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Back-up

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* Special PBT for sanitary applications, Adhesion test as per DIN ISO 813, D = Adhesive failure , R = Cohesive failure

ELASTOSIL® LR 3271/45 is the material of choice for ambitious

2-component soft-hard Sanitary Solutions

ELASTOSIL® LR 3271/45

for sanitary applications

Shower heads

Jet regulator, aerator

Static and dynamic

gaskets

Product benefits

Excellent initial

bonding performance

to Polyesters during

Injection Molding

Improved hot water

hydrolysis

resistance of the

adhesion layer

BfR, FDA approved

Suitable for drinking

water apps acc. to

KTW, W 270

LR 3271/45

(PC: 4 h, 100 °C)

0

2

4

6

8

10

12

14

Start 3 d 5 d

Peeling force / N/mm*

R RR

Stable adhesion

performance

in water at 70 °C

New Product

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* Acc. ISO 815-1 type B method A, non post cured

ELASTOSIL® LR 3072/50 Completes WACKER’s Portfolio of

Self-Adhesive and Oil Bleeding LSR Solutions

Benefits of LR 3072/50

Soft-hard combination

of LSR and PA, PBT

Reduced COF

due to oil film formation

Low compression set

for excellent sealing

10 %* after 22 h / 125 °C

Application

Single wire seals in addition

to connector seals

Oil bleeding

Self bonding

New Product

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*Class 8 – acc. DIN EN ISO 14644

Product Benefits

Food Product of Choice

‘ELASTOSIL® LR 3671/40’

BfR, FDA approved

Easier opening of

thermos flasks

Medical Product of Choice

SILPURAN® 6760/50

Fine filtering (50 µm) /

packaging into clean room*

USP class VI, ISO 10993

Self bonding Low coefficient of friction

Self-Adhesion Technology Can Be Combined with WACKER’s

Low Coefficient of Friction (COF) Technology

Under Development New Product

wacker: over 100 years of success...electrically conductive ‘liquid’ silicone rubber 13,04 13,04...

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