BYK-1640 is a polymeric, mineral oil and silicone-free defoamer designed for aqueous coatings, offering excellent performance and environmental safety. It utilizes polyamide particles for effective defoaming, is odorless, and suitable for direct food contact, making it a versatile option for various applications including architectural coatings and adhesives. The product boasts an impressive cost/performance ratio and complies with strict regulatory standards, positioning it as a modern alternative to traditional mineral oil defoamers.

1. BYK-1640
Mineral Oil and Silicone-Free Defoamer
for Aqueous Coatings

2. Mineral oil-based defoamers are widely used, mainly in applications in which
price is a key criteria. Negative side effects such as separation tendency,
odor, environmental aspects and the often lacking approvals for direct food
contact mean that the market is looking for affordable alternatives.
Today, polymeric defoamers are the standard key technology to fulfill the
strict regulatory requirements.
Excellent Price/Performance and Environmentally
Sound Defoamers
Mineral oil
Native oil
Polymeric
chemistry
Environmentally friendly

3. BYK-1640 is a polymeric defoamer demonstrating new technology of using
polyamides as hydrophobic particles.
BYK-1640
Excellent in Price/Performance Ratio
Cost
Silicone chemistry
Mineral oil
Performance
Polymeric chemistry e.g. BYK-1640
Fatty alcohol derivates

4. BYK-1640
Product Properties
Chemical Composition
Defoamer compound based on polyamide particles
and hyper-branched polymers
Non volatile matter 62 %
Solvent Water
Defoamer type Emulsion
Hydrophobic particles Polyamide – new patented technology
APEO- & Emissions-free Yes
VOC-free <1500ppm (Greenability HS GC)
FDA
175.105 Adhesives
175.300 Polymeric and resinous coatings
Recommended Levels
additive (as supplied)
based upon formulation:
0.1% - 05%
in exceptional cases up to 0.8 %

5. BYK-1640
Benefits
• Versatile defoamer with excellent cost/performance ratio
• Mineral oil- and silicone-free, odorless
• Especially recommended for waterborne interior and exterior emulsion
paints (PVC range 30-85)
• Easy to incorporate
• No negative influence on color-acceptance
• Emission-free and suitable for direct food contact

6. BYK-1640
Applications
recommended
suitable
Architectural
Coatings
Construction
Industry
Adhesives
Protective
Coatings
BYK-1640
Suitable binder systems are:
- Styrene acrylics
- VAE‘s
- VeoVa
- Acrylic copolymers
- Polyurethane dispersions
Paper
Coatings
Can
Coatings
Printing
Inks
BYK-1640

7. 0
1
2
3
4
5
6
Macro Micro Macro Micro Macro Micro Macro Micro
Foam Foam Foam Foam
VAE PVC 31% Styrene Acrylic PVC 61% VeoVa PVC 53% Styrene Acrylic PVC 71
Rating
BYK-1640
Mineral oil with silicone
Silicone emulsion
Polymer emulsion
Polymer
BYK-1640 in Comparison with Different Defoamers in
Various Resins and PVC-Ranges
1 = no foam
5 = severe foamIncorporation: 0.3% Defoamer post addition, 3 min @ 2 m/s

8. BYK-1640
Comparison in the Grind
0.3 % Mineral Oil Defoamer 0.3% BYK-1640
System: Resin free titanium dioxide slurry

9. BYK-1640
Excellent Defoaming Action During Application
0.3 % Mineral Oil Defoamer 0.3% BYK-1640
System: Emulsion Paint (PVC 31) based on vinyl acetate ethylene (VAE)

10. Aqueous Can Coatings Varnish: Side by Side
Application: Not Mixed – High Speed Mixed
0.3% BYK-1640
0.3% Silicone defoamer
Control
Foamtest: high speed mixing
Foamtest: high speed mixing
Foamtest: high speed mixing
Strong foam stabilization during mixing
Incompatible defoamer
Good defoaming and compatibility with BYK-1640

11. Results
BYK-1640 Applications
Target applications
• Process defoamer during production
• Modern alternative to mineral oil defoamers
For
• Filled Wood adhesives
• Paper and board applications
• Flooring and Carpet adhesives
For systems based on
• Acrylic copolymers for Flooring adhesives
• Polyurethane dispersions for thermally activated adhesives for furniture,
automotive, shoe and construction industries
• EVA dispersions for paper & board, converting
• Acrylic copolymers for PSA application

12. BYK-1640 in a Furniture, Automotive, Shoe and
Construction Adhesive
0
100
200
300
400
500
600
no defoamer BYK-1640 BYK-014 Mineral Oil 1 Mineral Oil 2
FoamVolumeinml
PU Dispersion
after 1 day after 1 week 40°C

13. BYK-1640
in an Adhesive for Paper and Packagings
0
50
100
150
200
250
300
350
no defoamer BYK-1640 BYK-014 Mineral Oil 1 Mineral Oil 2
FoamVolumeinml
EVA Dispersion
after 1 day after 1 week 40°C

14. Excellent Defoaming Action in Emulsion based
Plaster
Use Level:
0.3% Defoamer
on total
05.11.2014, Seite 14, Carsten Nagel, BYK, Entschäumer
0
0.2
0.4
0.6
0.8
1
1.2
1.4
W/O Defoamer BYK-1640 Mineral Oil w/o
silicone
Mineral Oil
with silicone
Polymer 1 Polymer 2
Desity[g/ml]
direct
after 1 d

15. ANTI-TERRA®
, BYK®
, BYK®
-DYNWET®
, BYK®
-SILCLEAN®
, BYKANOL®
,
BYKETOL®
, BYKJET®
, BYKOPLAST®
, BYKUMEN®
, CARBOBYK®
, DISPERBYK®
,
DISPERPLAST®
, LACTIMON®
, NANOBYK®
, PAPERBYK®
, SILBYK®
,
VISCOBYK®
, and Greenability®
are registered trademarks of BYK-Chemie.
ACTAL®, ADJUST®, ADVITROL®, ASTRABEN®, BENTOLITE®, CLAYTONE®,
CLOISITE®, FULACOLOR®, FULCAT®, GARAMITE®, GELWHITE®, LAPONITE®,
MINERAL COLLOID®, OPTIBENT®, OPTIFLO®, OPTIGEL®, PURE THIX®,
RHEOCIN®, RHEOTIX®, RIC-SYN®, TIXOGEL®, and VISCOSEAL® are registered
trademarks of BYK Additives.
AQUACER®, AQUAMAT®, AQUATIX®, CERACOL®, CERAFAK®, CERAFLOUR®,
CERAMAT®, CERATIX®, HORDAMER®, and MINERPOL® are registered
trademarks of BYK-Cera.
SCONA® is a registered trademark of BYK Kometra.
The information herein is based on our present knowledge and experience. The information
merely describes the properties of our products but no guarantee of properties in the legal sense
shall be implied. We recommend testing our products as to their suitability for your envisaged
purpose prior to use. No warranties of any kind, either express or implied, including warranties of
merchantability or fitness for a particular purpose, are made regarding any products mentioned
herein and data or information set forth, or that such products, data or information may be used
without infringing intellectual property rights of third parties. We reserve the right to make any
changes according to technological progress or further developments.