Blue Star Silicones Brochure Gb 2007

Co-star with Rhodorsil® RTV-2

for your best casting performance

SILICONES FOR MOLDMAKING APPLICATIONS

Silicone elastomers are one

of several materials used to produce

molds, together with polyurethane

elastomers, plasters, alginates

and latex.

These elastomers have enabled new molding techniques to be developed

(e.g. very flexible glove molds) and also the molding of very aggressive

reproduction resins (polyurethanes, polyester, epoxies, etc.). Access to

translucent and transparent grades together with the appropriate mechanical

properties have also enabled the development of vacuum prototype molding.

This type of application covers a very broad-ranging market, spanning

from decorative molding to industrial molding.

The Rhodorsil® RTV-2 range was developed with this in mind, to meet all these

requirements. Rhodorsil® RTV-2 silicone elastomers have specific properties

which provide users with many advantages.

Flexibility simplified mold, gentle on delicate masters

Easy to use no need for complex equipment

Release properties easy to demold

Tear strength thin section membranes, complex shapes

Room temperature curing, no oven required, gentle on delicat masters

no heat release

Fine reproduction detail details to the nearest micron

Aging resistance reusing of stored molds, especially

for polyaddition RTV-2’s

Heat stability molding of exothermic reaction materials

and low melting point alloys

Dielectric properties use in HF molding and in galvanoplastics

Low shrinkage molding accuracy

Advantages of using Rhodorsil®

il RTV-2 silicones in molding

The Rhodorsil® RTV 2’s used

in molding are two-component,

room temperature curing elastomers.

Polyaddition (PA)Polycondensation (PC)

Mixing Ratio 100/2 to 100/10 100/10 to 100/100

Safety Precautions

during mixing

Requirements (Glasses,

gloves) in a well ventilated

area

None

Pot life and

demolding time

Variable depending

on catalysis

Not heat accelerated

Can be independent

Heat accelerated

Risk of inhibition No Yes

Sensitive to reversion

in confined spacesYes No

Shrinkage 0.8% to 1.2% 0.05% to 0.2%

Range of products 3200 ; 3300 3100 ; 3400 ; 3500

There are two different types

Silanol cure

Polycondensation type Rhodorsil® RTV-2’s supplied as base and catalyst.

Addition cure

Polyaddition type Rhodorsil® RTV-2’s supplied as part A and part B.

Each of these types has specific features. Care should be taken to make

the right choice to the molding technique and the user’s requirements.

il RTV-2 silicones in molding

General purpose

Prototyping

Pad-printing

Construction

There are numerous molding applications

for Rhodorsil® RTV-2’s classified according

to the principal markets.

This type of application covers a very broad-ranging

market, spanning from decorative molding

to industrial molding.

H Figurines

H Toys

H Candles

H Decoration

H Special effects

H Picture frames

Due to pad printing, motives of different colors

can be printed on various surfaces objects (bottle,

plate…).

H General transfer printing

H Transfer printing on ceramics

H Label, decal transfer

Silicone molds allow esthetical construction

in concrete parts.

H Restoration of historical monuments

H Statues

H Paving, flag stones

H Facade ornaments / architectural trim molding

Prototyping is a technique which allows an industrial

company to increase its reactivity to changes

in market trends.

Bluestar Silicones SAS

21, avenue Georges Pompidou

F-69480 Lyon Cedex 03 - France

Tel: +33 (0)4 72 13 19 00 - Fax: +33 (0)4 72 13 19 88

www.bluestarsilicones.com

Bluestar Silicones France SAS

(Commonwealth of Independant States (CIS),

Middle East, Eastern Europe, Africa)

21, avenue Georges Pompidou

F-69480 Lyon cedex 03

Tel. + 33 (0)4 72 13 19 00

Fax + 33 (0)4 72 13 19 88

Usine Bluestar Silicones SBU Silicones

Customer Service

(France, Belgium, Luxembourg, the Nederlands)

55, rue des Frères Perret - BP 22

F-69191 Saint-Fons cedex

Tel. + 33 (0)4 72 73 74 75

Fax + 33 (0)4 72 73 76 45

Bluestar Siliconi Italia SpA

(Italy)

Via Archimede, 602

I - 21042 Caronno Pertusella (Va)

Tel. + 39 02 964 14 353

Fax + 39 02 964 50 209

Bluestar Silicones Brasil Ltda

(South America)

Av. Maria Coelho Aguiar, 215

Bloco B - CENESP

05804-902 Sao Paulo - SP Brazil

Tel. + 55 11 3741 8860

Fax + 55 11 3741 9539

Bluestar Silicones Germany GmbH

(Germany, Switzerland, Austria)

Quettinger Strasse 289

D -51381 Leverkusen

Tel. + 00 49 2171 5009 0

Fax + 00 49 2171 5009 67

Bluestar Siliconas España SA

(Spain, Portugal)

Vic 3, Poligono Industrial La Florida

E - 08130 Santa Perpetua de Mogoda (Barcelona)

Tel. + 34 93 504 02 600

Fax + 34 93 560 80 49

Bluestar Silicones USA Corp

(USA - Canada)

8 Cedar Brook Drive

Cranbury NJ D08512 - 7500 - USA

Tel. 1 609 860 3766

Fax 1 609 860 0139

Bluestar Silicones UK Ltd

(United Kingdom, Ireland)

Wolfe Mead, Farnham Road

Bordon, Hampshire GU35 0NH

Tel. + 44 14 20 606 000

Fax + 44 14 20 606 060

Bluestar Silicones Scandinavia A/S

(Norway, Sweden, Denmark, Finland)

Dronningensgate 6

N - 0152 Oslo

Tel. + 47 22 91 07 61

Fax + 47 22 91 07 64

Bluestar Silicones Asia Pacific

Unit A, 18/F Manulife Tower

169 Electric Road

North Point - Hong Kong

Tel. 852 3106 2720

Fax 852 2979 0241

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The information contained in this document is given in good faith and based on Bluestar Silicones current

knowledge. Bluestar Silicones makes no representation or warranty as to the accuracy, completeness

of such information or as to the compatibility of such information with the user's intended application : information

is supplied on an “as-is” basis and is not binding on Bluestar Silicones. Nothing contained herein is intended

as a recommendation to use the products so as to infringe any patent. Bluestar Silicones assumes no liability

for users’ violation of patent or other rights and disclaims any liability for loss, injury or damage which may result

from the use of the products. Therefore, information contained herein must not be used as a substitute for

necessary prior tests which are the sole responsibility of the user and which alone can ensure that a product

is suitable for a given use.

Reproduction materials

H Hydraulic concrete

H Mortar

H Reconstituted stone

H Polyester

Choosing the best suited product

H Construction

- For applications requiring high dimensional

accuracy, choose a polyaddition RTV.

- For the molding of deep-section parts with

accentuated undercuts, choose a RTV combining

both flexibility and mechanical strength.

- For vertical imprints, use a specific silicone

for impression coating techniques (thixotropic).

- For sock-molding techniques choose a very soft

RTV.

H National heritage conservation

This type of molding requires a specific approach

in order to avoid damaging the model.

Care should be taken on the compatibility

of insulating products with the model (pore fillers,

release coating).

If the mold stays on the model for more than

the recommended time (24 hours at 23°C) no

adhesion problems with the model will occur.

These tests can be carried out on a non visible

part of the model (e.g. the base) or a test sample.

Construction, building & national heritage conservation

InnovationH 1 to 1 addition cure available

to enhance ease of use

H Superior mold release

H Easy processing

H Mold release capability

H Highly accurate reproduction

H Flexible molds

H Good abrasion resistance

Advantagesof silicones

RTV 3512 A/B NB

RTV 3530 A/B NB

Product name

Off-white

Off-white

Off-white

Off-white

1/1

1/1

5 000

30 000

60 min

1 h

90 min

10 h

12

30

20

25

5

6

800

500

Part A Part B

Color Color

Part A + Part B

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)

Characteristics before curing Curing Characteristics after curing

Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

H Polyaddition

RTV 3325

RTV 3325 P

Product name

White

Beige

6 H

SPE

Thixo

24 H

Cata 83 Paste

100/5

100/4

35 000

35 000

Paste

35 000

20-60 min

90-150 min

90-150 min

90-150 min

6 h

24 h

24 h

24 h

25

25

25

25

21

21

21

21

4

4

4

4

450

450

450

450

Paste 90 min 16 h 25 9 2,5 350

Base Preconised

catalystColor

Part A + Catalyst

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)


Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

H Polycondensation

RTV 3430 SB A/B Transparent Grey 10/1 28 000 60 min 10 h 28 20 6 600

pemaco - Photos : Bluestar SiliconesSIL 07 002 3-Cons1


H Plaster

H Wax

H Polyester

H PU foams

H Low melting point metals


- For good dimensional stability, choose

a polyaddition RTV.

- For very pronounced under cuts, use a silicone

with high mechanical properties.

- For vertical imprints, use a special thixotropic

silicone with impression molding techniques.

- For good mold stability, use a product with

a higher final hardness.

General purpose

H Highly accurate reproductions

H Easy processing

H Dimensional stability

H Long-lasting molds

H Curing accelerated by heat




H Superior mold release

RTV 3512 A/B

RTV 3428 A/B

RTV 3440 A/B

Product name

Whitish

Colorless

Beige

Orange

Pink/white/colorless

Blue

1/1

100/10

100/10

5 000

22 000

15 000

30 min

1 h

1 h 30

90 min

16 h

24 h

12

28

40

18

20

9

3

7,5

4

600

600

300

RTV 3450 A/B Beige Black 100/10 15 000 1 h 30 16 h 50 8 5 300

Part A Part B

Color Color

Part A + Part B

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)


Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

H Polyaddition

RTV 3310

RTV 3318

RTV 3325

RTV 3330

Product name

White

White

White

Grey

H

6 H

SPE

Thixo

24 H

6 H

SPE

Thixo

24 H

SPU

100/5

100/5

100/5

100/5

30 000

30 000

35 000

35 000

150 min

20-60 min

90-150 min

20-60 min

90-150 min

90 min

24 h

6 h

24 h

6 h

24 h

16 h

10

18

25

30

13

20

22

18

2,2

3

4

3

600

500

450

380

Part A Preconised

catalystColor

Part A + Catalyst

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)


Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

H Polycondensation

pemaco - Photos : Bluestar SiliconesSIL 07 002 3-GP1

Materials suitable for backing

H Resins (PUR, polyester…)

H Plastics (PVC, ABS, PMMA…)

H Wood

H Light alloys


- For fragile or hollow parts, it is recommended

to use very flexible silicones.

- For the “color tansfer” technique: dilute a

RTV-2 with a silicone oil (with standard viscosity

50mPa.s) to adjust the hardness of the pad.

Pad-printing

H Flexible (possible to adapt

hardness to conform to irregular shapes)

H Perfect transfer of inks to the surface

due to low surface tension and release

properties of silicone

H Silicone pads’ long life

H Pads’ stability to storage


InnovationH Anti-static available to improve the

printing quality and avoid electrostatic

discharge.

RTV 3120 A/B

RTV 3125 A/B

RTV 3128 A/B

Product name

Translucent

Translucent

Translucent

Translucent

White

Pink

1/1

100/10

100/10

35 000

30 000

25 000

30 min

80 min

1 h

4 h

16 h

16 h

20

30

28

15

25

20

4,5

7

7,5

500

550

600

RTV 3132 A/B Translucent Blue 100/10 28 000 15 min 12 h 32 20 6,5 450

Part A Part B

Color Color

Part A + Part B

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)


Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

pemaco - Photos : Bluestar SiliconesSIL 07 002 3-PadP1


H PU Resins

H Plasters

H Waxes


- Transparent products optimize the positioning

of the joint surface (cutting the mold) and enable

a visual of the part.

- For larger production runs, use a

“self bleeding” type product.

Rapid prototyping,modelling

H Accurate reproduction

H Dimensional stability

H High transparency

H Curing accelerated by heat

H Outstanding mechanical

properties

H Chemical resistance




RTV 3040 A/B

10/1

RTV 3040 A/B

Self bleeding

Product name

Transparent

Transparent

Translucent

Translucent

10/1 42 000 75 min < 24 h 38 19 5,2 350

RTV 3040 A/B

1/1Transparent Translucent 1/1 56 000 1 h < 24 h 37 22 5,5 400

Part A Part B

Color Color

Part A + Part B

Ratio Viscosity

Pot life

at 25 °C

Demolding

time at 25 °C

Shore hardness

(Shore A)


Tear strength

(kN/m)

Tensile strength

(Mpa)

Elongation

at break (%)

pemaco - Photos : Bluestar SiliconesSIL 07 002 3-Proto1

Kinetic might be adapted using

H Accelerator Rhodorsil® PA 39

H Retarder Rhodorsil® PA 40

Documents

Blue Star Silicones Brochure Gb 2007