ACEMATT® for Water-Based Furniture and Parquet CoatingsTechnical Information 1269

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Growing environmental awareness and legal constraints are requiring a major effort from all partners in the coat-ings industry. Attempts to meet these requirements range from a reduction of solvents to solid systems and the use of radiation-curing coatings. Another environment-friendly option is the use of water-dilutable systems. These we will discuss in this bulletin.

The tough requirements placed on these furniture and parquet coatings need continuous development. In addi-tion to binders, additives also play an important role. In our research and technical service laboratory, we have carried out comprehensive experiments on the influence of matting agents on the formulation and on coating properties.

MM

-con

cent

ratio

n [%

]

2.5

2.0

1.5

1.0

0.5

0.0TS 100 3300 OK 520 Compet. A Compet.B

60°-reflectometer value: 23

MM

-con

cent

ratio

n [%

]

2.5

2.0

1.5

1.0

0.5

0.0TS 100 3300 OK 520 Compet. A Compet. B

60°-reflectometer value: 15

System A System B

Efficiency

Besides ACEMATT® TS 100, which is known to be very efficient, ACEMATT® 3300 also displays high matting power.

The matting of water-based coatings using ACEMATT®Water-based coatings are generally easy to matt, although their incorporation and stabilization do require special attention. At this point, we must mention disper-sion, the adsorption of associative thickeners by silica matting agents, and storage stability. Efficiency and high transparency are required. These requirements can be satisfied through the choice of suitable matting agents.

To demonstrate how our new matting agent ACEMATT® 3300 satisfies these high requirements,

we will apply two formulations that are used for indus-trial applications and contain conventional binders.

For our experiments, we used a two-component PUR coating (System A) and a UV-curing acrylic dispersion (System B). In addition to our new ACEMATT® 3300, we also tested our well proven ACEMATT® TS 100 and ACEMATT® OK 520 plus two well-known competitor products. All tested coatings were adjusted to the same degree of gloss and the same viscosity.

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Thic

kene

r-co

ncen

trat

ion

[%]

TS 100 3300 OK 520 Compet. A Compet. B Unmatted

2.01.81.61.41.21.00.80.60.40.20.0

Viscosity at D(100/s) = 400 mPas

rela

tive

visc

osity

[%]

TS 100 3300 OK 520 Compet. A Compet. B Unmatted

200

150

100

50

2W 40 CPost manufacturing3W 40 C

1W 40 C5W 40 C

rela

tive

visc

osity

[%]

TS 100 3300 OK 520 Compet. A Compet. B Unmatted

200

150

100

50

2W 40 CPost manufacturing3W 40 C

1W 40 C4W 40 C

Thic

kene

r-co

ncen

trat

ion

[%]

TS 100 3300 OK 520 Compet. A Compet. B Unmatted

5.04.54.03.53.02.52.01.51.00.50.0

Viscosity at D(100/s) = 1200 mPas

System A

System A System B

System B

Thickener adsorption

Because of its novel post-treatment, ACEMATT® 3300 shows clearly reduced adsorption of associative thickeners compared to all other matting agents tested.

It is well known that the presence of silica matting agents in coatings usually results in an increase in viscosity. This behavior is particularly evident in forced-heat storage (40 °C), where a reduction in viscosity caused by thick-

ener adsorption can initially be observed. In our experi-ments, ACEMATT® 3300 was the only matting agent to exhibit a largely stable viscosity behavior over a period of 4 or 5 weeks.

Storage stability

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Gra

de se

dim

enta

tion

test

5

4

3

2

1

0TS 100 3300 OK 520 Compet. A Compet. B

1 = No phase separation2 = Loose sediment, easily dispersible3 = Sediment, still redispersible

1 1

2

3 3

Den

sity

(ove

r bla

ck)

2.3

2.2

2.1

2.0

1.9

1.8TS 100 3300 OK 520 Compet. A Compet. B

Den

sity

(ove

r bla

ck)

2.3

2.2

2.1

2.0

1.9

1.8TS 100 3300 OK 520 Compet. A Compet. B

Gra

de se

dim

enta

tion

test

5

4

3

2

1

0TS 100 3300 OK 520 Compet. A Compet. B

1 = No phase separation2 = Loose sediment, easily dispersible3 = Sediment, still redispersible

2

1

2

3 3

System A

System A

System B

System B

Anti-settling behavior

None of the matting agents produced a sediment that was not redispersible, only ACEMATT® 3300 showed no separation of coating and matting agent in either of

the two systems. Test conditions: centrifuge 14 h, 15 g, 35 °C; according to our experience, this corresponds to 4 weeks of storage at 23 °C.

All of the products tested exhibited a high level of trans-parency, measured here as density, but slight advantages for ACEMATT® TS 100 and ACEMATT® 3300 could be discerned. Here the coloristic measured quantity

Transparency

“density” represents the change of jetness of a deep black substrate affected by the transparency of a coating. The higher the density, the higher the transparency.

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System A

Deioniz-ed water

Alcohol 48 %

Coffee Red wine Red wine vinegar

Average

TS 100 0.46 1.37 0.99 3.0 6.3 2.4

3300 0.46 1.27 1.30 3.5 5.7 2.4

OK 520 1.15 1.28 1.18 4.5 5.9 2.8

Compet. A

0.35 0.53 0.86 6.4 6.3 2.9

Compet. B

0.92 0.67 1.09 6.6 7.0 3.3

Average 0.67 1.02 1.08 4.8 6.2 2.8

System B

Deioniz-ed water

Alcohol 48 %

Coffee Red wine Red wine vinegar

Average

TS 100 8.2 1.3 2.5 2.8 2.3 3.6

3300 6.5 1.9 3.3 2.4 1.7 3.2

OK 520 8.2 1.0 4.6 1.4 0.9 3.2

Compet. A

8.0 3.0 5.7 4.1 3.7 4.9

Compet. B

9.6 3.0 8.4 6.3 5.0 6.4

Average 8.1 2.0 5.1 3.4 2.7 4.3

Chemical resistance

The test consisted of a 24-hour loading of the coatings with conventional chemicals. Resistance was measured as the degree of irreversible change based on the color

difference ΔΕ*. Here, too, ACEMATT® 3300 demonstrat-ed its excellent suitability for these systems.

ConclusionsThe experiments showed that in the tested coatings, our proven matting agents, ACEMATT® TS 100 and ACEMATT® OK 520 already achieve good results for the required properties. The use of ACEMATT® 3300 offers additional advantages in the formulation of water-based coatings, namely the minimization of thickener adsorption and improved storage stability and suspension behavior.

All ACEMATT® products can be quickly incorporated into water-dilutable coatings without problems. We recom-mend approximately 10 minutes of dispersion, prefer-ably in the dissolver, at a circumferential speed of about 5 m / s.

The formulations used in our laboratory and the charac-teristic physical-chemical data of the matting agents used are documented in the insert.

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System A – Two component -PUR-coating /WC2420-01

% b.w.

Formulation Bayhydrol VP LS 2342 (1) 85.00

Water 10.23

Butyl glycol 1.00

BYK 028 (2) 0.60

Acrysol RM-8 W (3) 0.82

BYK 380 (2) 0.60

BYK 346 (2) 0.40

ACEMATT® 3300 (4) 1.35

CrosslinkerBayhydur VP LS 2336 (1)

10.00

110.00

TechnicalData

Viscosity (D=100/s) 350 mPas

Trocknungszeit klebfrei ca. 1.5 h

Dry film thickness 30 μm

60°-reflectometer value 23

Manufacturer:(1) Bayer Material Science, www.bayer-ls.com(2) BYK-Chemie, www.byk-chemie.com(3) Rohm & Haas, www.rohmhaas.com(4) Evonik, www.evonik.com

System B – Acrylate dispersion UV-curing / WC2491-01

% b.w.

Formulation Craymul 2716 (1) 85.20

Foamex 822 (2) 0.80

TEGO® Airex 902 W (2) 0.30

Coapur 830 W / Water 1:1 (3)

2.40

Surfynol 104 E (4) 0.50

Irgacure 184 / Butyl glycol 1:1 (5)

1.80

Aquacer 537 (6) 4.00

Zonyl FSJ / Water 1:9 (7)

0.50

Water 2.70

ACEMATT® 3300 (8) 1.80

100.00

TechnicalData

Viscosity (D=100/s) 1300 mPas

Drying 5 min 50 °C

UV-curing Hg-lamp 100 W / cm, 5 m / min, 900mJ / cm²

Dry film thickness 30 μm

60 °-reflectometer value 15

Manufacturer: (1) Cray Valley, www.crayvalley.com(2) Tego Chemie Service, www.tego.de(3) Coatex, www.coatex.fr(4) Air Products, www.airproducts.com(5) Ciba Speciality Chemicals, www.cibasc.com(6) BYK-Chemie, www.byk-chemie.com(7) DuPont, www.dupont.com(8) Evonik, www.evonik.com

Example formulations containing ACEMATT 3300

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ACEMATT® for Water-based* Furniture and Parquet Coatings

Properties Unit Method ACEMATT® TS 100

ACEMATT® 3300

ACEMATT® OK 520

Competitor product A

Competitor product B

Manufacturing process

Fumed Silica Fumed Silica Precipitated Silica

Silica gel Silica gel

Post-treatment None PDMS (Polydimethyl siloxane)

Organic Microcrystalline Wax

Microcrystalline Wax

Pore volume ml / g NA NA NA 1.8 2.0

Agglomerate Particle size, d50

μm Laser diffraction 10.0 9.5 6.5 5.5 7.2

pH value, 5 % – DIN ISO 787-9 6.5 7.9* 6.0 7.0 3.3

Oil absorption g /100g DIN ISO 787-5 360 290 240 300 300

* 5% in Water / Methanol 1:1

Physico-chemical data of Silica

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07-2

015

Europe / Middle-East / Africa / Latin AmericaEvonik Resource Efficiency GmbH Business Line Silica Rodenbacher Chaussee 4 63457 Hanau-Wolfgang Germanyphone +49 6181 59-8118 fax +49 6181 59-78118 ask-si@evonik.comwww.evonik.com

North America

Evonik Corporation Business Line Silica 299 Jefferson Road Parsippany, NJ 07054-0677 USAphone +1 800 233-8052 fax +1 973 929-8502 ask-si-nafta@evonik.com

Asia / Pacific

Evonik (SEA) Pte. Ltd. Business Line Silica 3 International Business Park #07-18, Nordic European Centre Singapore 609927phone +65 6 809-6877 fax +65 6 809-6677 ask-si-asia@evonik.com

This information and any recommendations, technical or otherwise, are presented in good faith and believed to be correct as of the date prepared. Recipients of this information and recommenda-tions must make their own determination as to its suitability for their purposes. In no event shall Evonik assume liability for damages or losses of any kind or nature that result from the use of or reli-ance upon this information and recommendations. EVONIK EXPRESSLY DISCLAIMS ANY REP-RESENTATIONS AND WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, AS TO THE ACCURACY, COMPLETENESS, NON-INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE (EVEN IF EVONIK IS AWARE OF SUCH PURPOSE) WITH RESPECT TO ANY INFORMATION AND REC-OMMENDATIONS PROVIDED. Reference to any trade names used by other companies is neither a recommendation nor an endorsement of the cor-responding product, and does not imply that similar products could not be used. Evonik reserves the right to make any changes to the information and/or recommendations at any time, without prior or subsequent notice.

ACEMATT® is a registered trademark of Evonik Industries or its subsidiaries.

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