Sikafloor® -235 ESD2-part epoxy electrostatically dissipative self-smoothing system
发布时间：2023/05/15
Product Data Sheet
Edition 03/03/2012 EN
Sikafloor® -235 ESD
1
1/7
Sikafloor® -235 ESD
Sikafloor® -235 ESD2-part epoxy electrostatically dissipative self-smoothing system
Product
Description
Sikafloor® -235 ESD is a 2-part, electrostatically dissipative self-smoothing, coloured
epoxy resin coating.
Uses
Decorative and protective dissipative self-smoothing system for concrete or
cement screeds with normal up to medium heavy wear.
Particularly suitable for areas with requirements for a low electrostatic charge
(Body-voltage) and dissipative surface.
Typical applications include industries that process, assemble, install, package,
test or transport, such as clean room, pharmaceutical, automotive industries
etc.
Characteristics /
Advantages
Body voltage generation < 100 V
Good mechanical and chemical resistance
Easy application
Easy to clean
In accordance with general ESD requirements
Liquid proof
Tests
Approval Standards
Conforms to the requirements of DIN EN 61340-5-1; DIN EN 61340-4-1.
(Internal Test)
Fire classification in accordance with EN 13501-1, Report-No. 2007-B-0181/18, MPA
Dresden, Germany, May 2007.
Product Data
Form
Appearance / Colours
Resin - part A: coloured, liquid
Hardener - part B: transparent, liquid
Almost unlimited choice of colour shades.
Due to the nature of carbon fibres providing the conductivity, it is not possible to
achieve exact colour matching. With very bright colours (such as yellow and orange),
this effect is increased. Under direct sun light there may be some variations and
colour variation, this has no influence on the function and performance of the coating.
Packaging
Part A: 19.5 kg
Part B: 5.5 kg
Part A+B: 25 kg (part A+B) ready to mix units
Storage Conditions /
Shelf Life
12 months from date of production if stored properly in original, unopened and
undamaged sealed packaging in dry conditions at temperatures between +5°C and
+30°C.
Construction2
2/7
Sikafloor® -235 ESD
Technical Data
Chemical Base
EP
Density
Part A: ~ 1.69 kg/l (DIN EN ISO 2811-1)
Part B: ~ 1.03 kg/l
Mixed Resin: ~ 1.49 kg/l
All Density values at +23°C.
Solid Content
~ 100% (by volume) / ~ 100% (by weight)
Electrostatic Behaviour
Resistance to Earth* RE: < 109 Ohm (IEC 61340-4-1)
Flooring-footwear resistance
in combination with person: 7.5x105 - 3.5x107 Ohm (ESD STM 97.1-1999 /
IEC 61340-4-5)
Body voltage generation: < 100 V (ESD STM 97.2-1999 /
IEC 61340-4-5)
* For requests regarding EN 61340-5-2 Part 5.2.3 please contact your Sika representative.
Mechanical / Physical
Properties
Compressive Strength
Resin: ~ 44 N/mm² (28 days / +23°C) (EN 196-1)
Flexural Strength
Resin: ~ 20 N/mm² (28 days / +23°C) (EN 196-1)
Bond strength
> 1.5 N/mm² (failure in concrete)
(ISO 4624)
Shore D Hardness
58 (7 days / +23°C) (DIN 53 505)
Abrasion Resistance
60 mg (CS 10/1000/1000) (28 days / +23°C) (DIN 53109 Taber Abrader Test)
Resistance
Chemical Resistance
Resistant to many chemicals. Please ask for a detailed chemical resistance table.
Exposure*
Dry heat
Permanent
+50°C
Short-term max. 7 d
+80°C
Thermal Resistance
Short-term moist/wet heat* up to +80°C where exposure is only occasional
(i.e. during steam cleaning etc.)
*No simultaneous chemical and mechanical exposure.
System
Information
System Structure
Self-smoothing system ca. 1.0 - 1.5 mm – semi-gloss finish:
Primer: 1 x Sikafloor® -156
Earthing connection: Sikafloor® Earthing Kit
Conductive coat: 1 x Sikafloor® -220 W Conductive
Conductive screed: 1 x Sikafloor® -235 ESD, filled with Sikadur® 505Q quartz
j sand
Textured coating:
Primer: 1 x Sikafloor® -156
Earthing connection: Sikafloor® Earthing Kit
Conductive coat: 1 x Sikafloor® -220 W Conductive
Wearing course: 1 x Sikafloor® -235 ESD mixed with Extender T
Note: The system configurations as described must be fully complied with and may
not be changed. Due to the nature of carbon fibres providing the conductivity, surface
irregularities might be possible. This has no influence on the function and
performance of the coating. Do not use Sikafloor® -230 ESD to overcoat
Sikafloor® -235 ESD. 3
3/7
Sikafloor® -235 ESD
Application Details
Coating System Product Consumption
Primer Sikafloor® -156 0.3 - 0.5 kg/m2
Levelling (optional) Sikafloor® -156 mortar Refer to PDS of Sikafloor® -156
Conductive coat Sikafloor® -220 W Conductive 0.08 - 0.10 kg/m2
Wearing course smooth
(Film thickness ~ 1.0 -
1.5 mm)
Sikafloor® -235 ESD filled with
Sikadur® 505Q
Maximum 2.5 kg/m²
binder + Sikadur® 505Q
ca. 1.0 mm film thickness:
1:0.2 pbw (~ 1.3 + 0.3 kg/m²)
ca. 1,5 mm film thickness:
Depending on the temperature the
filling grade varies from:
1 : 0.1 pbw (2.3 + 0.2 kg/m²) to
1 : 0.2 pbw (2,1 + 0.4 kg/m²)
Wearing course smooth
(Film thickness ~ 1.5
mm)
1 pbw Sikafloor® -235 ESD
filled with quartz sand Sikadur
505Q
Maximum 2.5 kg/m²
Binder + quartz sand Sikadur® 505Q
Depending on the temperature the
filling grade varies from:
1 : 0.1 pbw (2.3 + 0.2 kg/m²) to
1 : 0.3 pbw (1.9 + 0.6 kg/m²
Textured coating
(Film thickness ~ 0.5
mm)
Sikafloor® -235 ESD
+ Extender T
+ Thinner C
0.7 - 0.8 kg/m²
1.5 - 2% (by weight)
1.5 - 2% (by weight)
Consumption / Dosage
These figures are theoretical and do not allow for any additional material due to
surface porosity, surface profile, variations in level or wastage etc.
*All values have been determined using Sikadur® 505Q quartz sand 0,1-0,3 mm.
Other quartz sand type will have an effect on the product, such as filling grade,
levelling properties and aesthetics.
Generally, the lower the temperature the less the filling grade.
Substrate Quality
Concrete substrates must be sound and of sufficient compressive strength (minimum
25 N/mm2 ) with a minimum pull off strength of 1.5 N/mm2 .
The substrate must be clean, dry and free of all contaminants such as dirt, oil,
grease, coatings and surface treatments, etc.
If in doubt, apply a test area first.
Substrate Preparation
Concrete substrates must be prepared mechanically using abrasive blast cleaning or
scarifying equipment to remove cement laitance and achieve an open textured
surface.
Weak concrete must be removed and surface defects such as blowholes and voids
must be fully exposed.
Repairs to the substrate, filling of blowholes/voids and surface levelling can be
carried out using appropriate products from the Sikafloor® , SikaDur® and SikaGard®
range of materials.
The concrete or screed substrate has to be primed or levelled in order to achieve an
even surface. Unevenness will influence the film thickness and thus the conductivity.
High spots must be removed by e.g. grinding.
All dust, loose and friable material must be completely removed from all surfaces
before application of the product, preferably by brush and/or vacuum.
Application
Conditions /
Limitations
Substrate Temperature
+10°C min. / +30°C max.
Ambient Temperature
+10°C min. / +30°C max. 4
4/7
Sikafloor® -235 ESD
Substrate Humidity
< 4% pbw moisture content.
Test method: Sika-Tramex meter, CM-measurement or Oven-dry-method.
No rising moisture according to ASTM (Polyethylene-sheet).
Relative Air Humidity
80% r.h. max.
Dew Point
Beware of condensation!
The substrate and uncured floor must be at least 3°C above dew point to reduce the
risk of condensation or blooming on the floor finish.
Application
Instructions
Mixing
Part A : part B = 78:22 (by weight)
Mixing Time
Prior to mixing, stir part A mechanically. When all of part B has been added to part A,
mix continuously for 2 minutes until a uniform mix has been achieved.
When parts A and B have been mixed, add the quartz sand or Sikadur® 505Q and
mix for a further 2 minutes until a uniform mix has been achieved.
To ensure thorough mixing pour materials into another container and mix again to
achieve a consistent mix.
Over mixing must be avoided to reduce air entrainment.
Mixing Tools
Sikafloor® -235 ESD must be thoroughly mixed using a low speed electric stirrer
(300 - 400 rpm) or other suitable equipment.
Application Method /
Tools
Prior to application, confirm substrate moisture content, r.h. and dew point.
If > 4% pbw moisture content, Sikafloor® EpoCem® may be applied as a T.M.B.
(temporary moisture barrier) system.
Levelling:
Rough surfaces need to be levelled first because varying thickness of the Sikafloor® -
235 ESD wearing course will influence the conductivity and aesthetical appearance.
Therefore use Sikafloor® -156 levelling mortar (see PDS).
Placing of earthing points:
See below “Notes on Application / Limits”.
Application of Sikafloor® conductive coat:
See PDS of Sikafloor® -220 W conductive.
Wearing course smooth:
Sikafloor® -235 ESD is poured, spread evenly by means of a serrated trowel.
Roll immediately in two directions with spiked roller to ensure even thickness.
After spreading the material evenly, turn the serrated trowel and smooth the surface
in order to achieve an aesthetically higher grade of finish.
Wearing course textured:
Sikafloor® -235 ESD (unfilled) is applied with a serrated trowel and then back-rolled
(crosswise) with a textured roller.
Cleaning of Tools
Clean all tools with Thinner C immediately after use. Hardened and/or cured material
can only be mechanically removed.
Temperature
Time
+10°C
~ 40 minutes
+20°C
~ 25 minutes
+30°C
~ 15 minutes
Potlife
Before applying Sikafloor® -235 ESD on Sikafloor® -220 W Conductive allow:
Substrate temperature Minimum Maximum
+10°C 24 hours 72 hours
+20°C 15 hours 48 hours
+30°C 10 hours 24 hours
Waiting Time /
Overcoatability
Times are approximate and will be affected by changing ambient conditions
particularly temperature and relative humidity.5
5/7
Sikafloor® -235 ESD
This product may only be used by experienced professionals.
Do not apply Sikafloor® -235 ESD on substrates in which significant vapour pressure
may occur.
Do not blind the primer.
Freshly applied Sikafloor® -235 ESD must be protected from damp, condensation and
water for at least 24 hours.
Avoid puddles on the surface with the primer.
Only start application of Sikafloor® conductive coat after the priming coat has dried
tack-free all over. Otherwise there is a risk of wrinkling or impairing of the conductive
properties.
Under certain conditions, underfloor heating combined with high point loading, may
lead to imprints in the resin.
If heating is required do not use gas, oil, paraffin or other fossil fuel heaters, these
produce large quantities of both CO2 and H2O water vapour, which may adversely
affect the finish. For heating use only electric powered warm air blower systems.
Tools:
Recommended supplier of tools: PPW-Polyplan-Werkzeuge GmbH, Phone: +49
40/5597260, www.polyplan.com Serrated trowel for smooth wearing layer:
e.g. Large-Surface Scrapper No. 565, Toothed blades No. 25
Serrated trowel for textured wearing layer:
e.g. Trowel No. 999 or Adhesive Spreader No.777, Toothed blades No. 23
Maximum layer thickness of wearing course: ~ 1.5 mm.
Excessive thickness (more than 2.5 kg/m²) causes reduced conductivity.
Before the application of a conductive flooring system, a reference area has to be
applied. This reference area must be assessed and accepted from the
contractor/client. The desired result and method of conductivity measurement must
be stated in the Specification and Method Statement. The number of conductivity
measurements is strongly recommended to be as shown in the table below:
Applied floor area Number of measurements
< 10 m² 1 measurement / m²
10-100 m² 10 - 20 measurements
> 100 m² 10 measurements / 100 m²
Notes on Application /
Limitations
The measuring points must have a distance of at least 50 cm to the next measuring
point. In case of a measurement lower/higher than required, an additional
measurement has to be carried out within 50 cm of the point with the insufficient
result.
Please note, that measuring results of the thixotropic version of Sikafloor® -235 ESD
may vary due to a difference in surface profile.
Placing of earthing points:
If the Sikafloor® Earthing Kit conductor system (system of anchored brass-plates with
stable earth connection) is applied, the instructions for use have to be followed
exactly. Every earthing point is able to conduct approx. 300 m². Ensure the longest
distance of each point in the area is max. 10 m to the next earthing point. Clean the
earthing spots carefully. For longer distances, additional earthing points have to be
placed. If site conditions do not allow placing of additional earthing points, longer
distances (>10 m) have to be bridged with copper tapes. The earthing spots have to
be connected to the ring-mains. This work must be executed and approved by an
electrical engineer and in accordance with any relevant regulations. 6
6/7
Sikafloor® -235 ESD
Numbers of earth connections:
Per room al least 2 earthing points. The optimum number of earth connections
depends on the local conditions and should be specified with documents. The
incorrect assessment and treatment of cracks may lead to a reduced service life and
reflective cracking - reducing or breaking conductivity. For exact colour matching,
ensure the Sikafloor® -235 ESD in each area is applied from the same control batch
numbers.
Please note:
According to experience the selection of the clothing, such as ESD footwear and
socks, weight of the test person, the ambient conditions, the probe and the
cleanliness of the floor, has substantial influence on the results of measurement. Our
systems have been measured under the following conditions:
ESD-footwear by
using cotton socks: "Vitaform" Specific.
Supplier: ET & ESD Lösungen Diana Conrads,
Birkenweg 12, D-89188 Merklingen,
Phon: +49 7337 922283, Fax: +49 7337 922284,
URL: http://www.et-esd.com, Email: esd@et-esd.de.
The ESD-footwear must fulfil the requirements of
DIN EN 61340-4-3 (Clime 2, resistance < 5 M Ohm).
Size of ESD-footwear: 42 (EU) (UK: 8; US: 8,5)
Weight of the test person: 90 kg
Ambient conditions: +23°C/50% rel. air moisture
Measuring tool: Resistance
to earth: Insulation Tester ET-150 PC.
Supplier: ET & ESD Lösungen Diana Conrads
Surface resistance probe: Carbon Rubber electrode. Weight: 2.50 kg
(+/- 0.25 kg); Diameter: 65 mm (+/- 5 mm);
Rubber pad hardness: Shore A 60 (+/- 10)
Measuring tool: System test: Insulation Tester ET-150 PC.
Supplier: ET & ESD Lösungen Diana Conrads
Measuring tool: Walking test: Walking Test-Kit ET-200. Supplier: ET & ESD
Lösungen Diana Conrads
The incorrect assessment and treatment of cracks may lead to a reduced service life
and reflective cracking - reducing or breaking conductivity.
For exact colour matching, ensure the Sikafloor® -235 ESD in each area is applied
from the same control batch numbers.
Curing Details
Temperature Foot traffic Light traffic Full cure
+10°C ~ 4 days ~ 8 days ~ 10 days
+20°C ~ 3 days ~ 6 days ~ 7 days
+30°C ~ 2 day ~ 5 days ~ 6 days
Applied Product ready
for use
Note: Times are approximate and will be affected by changing ambient conditions
Cleaning /
Maintenance
Methods
To maintain the appearance of the floor after application, Sikafloor® -235 ESD must
have all spillages removed immediately and must be regularly cleaned using rotary
brush, mechanical scrubbers, scrubber dryer, high pressure washer, wash and
vacuum techniques etc. using suitable detergents and waxes..
Value Base
All technical data stated in this Product Data Sheet are based on laboratory tests.
Actual measured data may vary due to circumstances beyond our control. 7
7/7
Sikafloor® -235 ESD
Local Restrictions Please note that as a result of specific local regulations the performance of this
product may vary from country to country. Please consult the local Product Data
Sheet for the exact description of the application fields.
Health and Safety
Information
For information and advice on the safe handling, storage and disposal of chemical
products, users shall refer to the most recent Material Safety Data Sheet containing
physical, ecological, toxicological and other safety-related data.
Notes:
The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in
good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under
normal conditions in accordance with Sika’s recommendations. In practice, the differences in materials, substrates and actual
site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability
arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written
recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended
application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties
must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the
most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request.
Sika (China) Ltd.
No.28 Jingdong Road, Suzhou Industrial Park,
JiangSu,P.R.China
http://chn.sika.com
The product is manufactured under a HKQAA
ISO9001/ISO14001 certified quality/environmental
management system.
Construction
Construction
Construction