blue star silicones brochure gb 2007
TRANSCRIPT
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)
Characteristics before curing Curing Characteristics after curing
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
Reproduction materials
H Plaster
H Wax
H Polyester
H PU foams
H Low melting point metals
Choosing the best suited product
- 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
Advantagesof silicones
InnovationH 1 to 1 addition cure available
to enhance ease of use
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)
Characteristics before curing Curing Characteristics after curing
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)
Characteristics before curing Curing Characteristics after curing
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
Choosing the best suited product
- 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
Advantagesof silicones
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)
Characteristics before curing Curing Characteristics after curing
Tear strength
(kN/m)
Tensile strength
(Mpa)
Elongation
at break (%)
pemaco - Photos : Bluestar SiliconesSIL 07 002 3-PadP1
Reproduction materials
H PU Resins
H Plasters
H Waxes
Choosing the best suited product
- 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
Advantagesof silicones
InnovationH 1 to 1 addition cure available
to enhance ease of use
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)
Characteristics before curing Curing Characteristics after curing
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