Relca® PD-805 is the next generation of a matting resin developed by Stahl. It is a 100% clean resin: no formaldehyde, no amines, no solvents, no heavy metals content that allows Relca® PD-805 to be well positioned in the market as a matting agent able to fulfill high restrictive legislations that many coatings have to overpass nowadays (HAP’s). When added to wood, metal and plastic, coatings not only become harder and more durable, their anti-blocking and wetting abilities are also enhanced.

1. Relca® PD-805
Next generation water-borne matting resin based
on new technology developed by Stahl
Sara Roig Valls, 04-04-2017

2. § Introduction to Relca® PD-805
§ Key benefits
§ Matting agents, properties and differences
§ Application Lab test results Relca® PD-805 based on:
- Acrylic for Joinery Picassian® AC-290
- Acrylic for wood furniture 2K system Picassian® AC-192
§ Conclusions
Agenda / content

3. Next generation water-borne matting resin
based on new technology developed by Stahl
§ Relca® PD-805 is the next generation of a matting resin developed by Stahl. It is
a 100% clean resin: no formaldehyde, no amines, no solvents, no heavy metals
content that allows Relca® PD-805 to be well positioned in the market as a
matting agent able to fulfill high restrictive legislations that many coatings have
to overpass nowadays (HAP’s).
§ When added to wood, metal and plastic, coatings not only become harder and
more durable, their anti-blocking and wetting abilities are also enhanced.
Relca® PD-805

4. Relca® PD-805
Characteristics Relca® PD-805
Solid Content
30%
Wet Appearance
White milky opaque
pH
7.5-8.5
Viscosity
300-600 cps
Particle Size
6-8µm
MFFT
>100ºC
Key Property
Matting resin
Markets
Wood, Metal, plastics, glass

5. Relca® PD-805
Key Benefits
Overall Advantages
■ Benefits Relca® PD-805
■ Surfactant free polymer
■ Formaldehyde free
■ 0% VOC content: “Clean product”
■ No porosity
■ Final formulation will have better stability if compared with standard
matting agents. Density 1.1 g/cm3
■ High thermal resistance (250ºC), Thermoset resin
■ Contains free hydroxyl groups, (improvement when used in 2K systems,
enhancing resin-based-coating adhesion on glass and mineral substrates).
■ Also suitable for UV curable systems
■ Longer pot life and better flow for 2K systems
■ No moisture absorption/oil absorption

6. ■ No high loss of film elongation properties
■ Enhances/maintains chemical resistance properties
■ High micro scratch resistance
■ Reduces dirt pick up
■ Soft feel touch films without the use of additives
■ Improves anti-fingerprint property
■ Can be cleaned and decontaminated
■ Improves blocking resistance
■ High transparency with high matting effect
■ Reduces tackiness when used with soft binders
■ Excellent compatibility with other binders (acrylic, PUD, hybrids)
Relca® PD-805
Key Benefits
Advantages in film

7. Organic duller mod.
Coating (2500x)
Matting Agents
Silica modified
coating (2500x)
PMMA bead
in PVC, 200x
Matting Polyurethane dispersion: Relca® PD-802 Relca® PD-805
µ

8. Matting Agents are designed to help extend the pot life and provide heat stability in
aqueous and other topcoats for leather by helping to improve application properties,
aesthetics, leveling, gloss, opacity, face, fill, and smoothness.
Main differencesproperties
Matting Agents
Silicas
Micronized
Wax
Organic
matting ag.
X-Linked
Beads
Relca®
PD-802
Relca®
PD-805
Matting Effectiveness ++ + + + ++ +
Micro Scratch resistance -- ++ +/- +/- ++ ++
Transparency + +/- +/- +/- ++ ++
Non-staining performance -- ++ + + + ++
UV resistance +/- +/- +/- ++ ++ ++
Heat resistance ++ -- +/- + - ++
Soft-touch -- + + +/- ++ +
Lasting properties + _ + +/- + ++
Cost + + +/- +/- +/- ++
Table showing qualitative property comparison of Relca® PD-805 vs other matting agents

9. Relca® PD-805
SEM Picture Melvin PSD

10. Matting Efficiency of Relca® PD-805
Spherical particles, with different particle
size, helps on the film formation and film
shrinkage during drying stage (water, glycols,
ammonia evaporation).
Matting
Agent
Wet Film
Dry Film

11. Picassian® AC-290 is our new
acrylic for exterior applications.
Combination of both enhanced
properties and performance of
the final product.
Performance
Relca® PD-805
with Picassian®
AC-290

12. Relca® PD-805 with Picassian® AC-290
Guide formulation
Guide Formulation Relca®
PD-805 Inorganic Matting Agent Organic Matting Agent
Picassian®
AC-290 64.5 64.5 60
BYK 028 0.12 0.12 0.10
Butyldiglycol 2.14 2.14 1.78
Tafigel PUR 61 0.34 0.34 0.32
Water 9.90 9.90 9.28
Matting agent 23.00 23.00 28.56
Total 100 100 100
Inorganic and polymeric duller are both previously pre-dispersed in water and post
added into formulation. Relca® PD-805 is added directly (no need to pre-disperse)
Cost sheet aprox for
the Matting Agent ↓↓ ↑ ↑↑
Solid content 35.92 33.62 32.55
Viscosity/pH 8.38/275 cps 8.84/950 cps 8.74/240 cps
Gloss level (20º/60º/85º) 1.1/8.7/28.1 0.9/7.7/24.5 1/7.9/23.5

13. Micronized
Waxes
Relca® PD-805
Inorganic
Matting Agent
Organic
Matting Agent
0.85 - 0.95 g/cm3 1.1g/cm3 2.50 - 2.73g/cm3 1.5 - 1.7 g/cm3
Density of the matting agent has a direct impact on
rheological properties and suspension behavior.
Rheology, Viscosity and Density
Density (g/cm3)

14. Fade degradation of the coating surface depending on the matting agent used
Early Water Uptake & Water Double Rubs
Early Water Uptake Test Method
■ Preparation/application:
■ Apply 90wµ on a dark glass
■ Dry 24h at RT
■ 24h water spot
■ Evaluation:
5-transparent (no change)
4-translucent
3-white translucent
2-white opaque
1-milky
Water and Ethanol Scrubs Test Method
■ Preparation/application:
■ Apply 90wµ on a dark glass
■ Dry 1 week at RT
■ Veslic equipment scrub. Solvents:
- Water and Ethanol
- Evaluation
- Color fade of the coating surface
Relca® PD-805 Inorganic Matting Agent Organic Matting Agent
Water Ethanol Water Ethanol Ethanol Water
200 Double Rubs
Value: 4
200 Double Rubs
Value: 3.5
200 Double Rubs
Value: 4

15. Early Water Uptake & Water Scrub esistance
Surface Whitening Recovery after Water Droplet 24h. Evaluation Double Rubs
Test with Water and Ethanol.

16. Hardness Development
Depending on the binder used you can achieve faster drying speeds. For instance
using Picassian® AC-290 after 1 day at RT almost final hardness is achieved.
König Hardness Test Method
Preparation/ application:
§ Apply 90wµ on a dark glass
§ Dry 24h at RT (1dA) measure hardness
§ Repeat same for 2dA, 5dA and 1d@50°C to be
sure that final hardness has been achieved
Hardness (sec)
Picassian® AC-290
w/o Matting
Relca® PD-805 Inorganic Matting Agent Organic Matting Agent
König hardness 1dA 26 53 38 35
König hardness 2dA 38 55 49 49
König hardness 3dA 54 56 51 52
König hardness
1d@50ºC
57 57 44 40

17. Chemical Resistance
Relca® PD-805 does not have porosity particles, therefore, chemical stains like ink
and coffee show better performance than with other conventional matting agents.
Test method: DIN 68861-1B on wood oak panel
Relca® PD-805 Organic Matting Agent Inorganic Matting Agent
Ac Et
W Am
Hc Ink
Ns St
Ac Et
W Am
Hc Ink
Ns St
Ac
W
Hc
Ns
Et
Am
Ink
St
Et: Ethanol 48%
Am: Ammonia 10%
Ac: Acetone
W: Water
Ns: Nivea soft
Hc: Hot Coffe
St: Sun tan lotion

18. Chemical Resistance/Anti-soiling property
Chemical Resistance Relca® PD-805 according DIN 68861-1
Advantage Relca® PD-805 vs others
No porosity particles → improvements in stain chemicals resistance coffee and inks
Hard resin →
Improve Solvent and Hand cream resistance
Test method: DIN 68861-1B
1 layer of 150 wet microns + 1 hour
at room temperature
+ light sanding + 1 layer of 150 wet
microns
Drying time: 7 days at room
temperature, apply stain and
solvent

19. Blocking Resistance
Keeping surfaces separated.
It is well known that matting agents improve blocking resistance. Relca® PD-805 at
same matting level works better than organic and inorganic matting agents, although
values for the inorganic one are also good.
Blocking Resistance Test Method
300 Wet microns of product (formulated
with suitable coalescent, thickener and
defoamer) are applied on Leneta chart.
After 16h drying at room temperature,
50 x 50 mm strips are cut, stacked face
to face and left at 50ºC for 2h under a
pressure of 0.2 kg/cm2.
The force needed to separate the two
strips is measured with a dynamometer
and value given in Newtons (N).
Picassian® AC-290 w/o
Picassian® AC-290 +
Relca® PD-805
Picassian® AC-290 +
Inorganic matting agent
Picassian® AC-290 +
Organic matting agent
3.1N 0.66N 0.82N 1.8N

20. Transparency
High transparent films.
Thanks to particle size distribution, Relca® PD-805 allows
high matting effect with also highest transparency.
DFT: 100µ
Relca® PD-805
Organic
Matting Agent
Relca® PD-805
Inorganic
Matting Agent
DFT: 100µ

21. Adhesion
Improving the surface attraction.
Relca® PD-805 improves the molecular interaction of water-based coatings with
substrates, resulting in better adhesion because hydroxyl groups interacts with other
chemical groups (i.e. oxide, hydroxyl or carboxylic groups) on multiple substrates.
Relca® PD-805 Organic Matting Agent Inorganic Matting Agent
90 Wet microns over dark glass. Dry for 1 week. Immerse the glass panels into water
for 10’, 20’ and 30’ and check adhesion every 10’. Organic and inorganic matting agents
delaminated after 10’ while Relca® PD-805 not.

22. Anfeuerung
Wood coatings that use Relca® PD-805 are easier to apply, adhere better, and last
longer. It can improve the penetration and wetting on wood coatings and also give
desired "solvent-based" look, so-called anfeuerung.
Relca® PD-805 Organic Matting Agent Inorganic Matting Agent
DL*=17.0
Da*=28.1
Db*=62.81
DL*=19.0
Da*=26.14
Db*=62.03
DL*=18.8
Da*=26.4
Db*=63.7

23. Weak Points Relca® PD-805
Whitening. Relca® PD-805 is highly recommended to be used as a
matting agent for rigid substrates. Flexes can cause whitening.

24. Water & Ethanol Double Rubs Resistance
Coating surface (in terms of losing matting effect) using a 2K acrylic system with
Relca® PD-805 is extraordinary lasting. After 2000 double rubs water 1kg of weight
pressure, no change in the shade surface. Also using Ethanol 48% it can resist more
than 200 double rubs with 30% Relca® PD-805.
0% Relca® PD-805 10% Relca® PD-805 20% Relca® PD-805
Water Double Rubs
(Loss of matting degree)
>2000
value:5
>2000
value:5
>2000
value:5
Ethanol Double Rubs
(Change/damage in
coating surface)
>200
value:5
105
value:4
190
value:4
0% Relca® PD-805 10% Relca® PD-805 20% Relca® PD-805
Ethanol 105 Water >2000 Ethanol 190 Water >2000 Ethanol >300
Double Rubs Test:
Veslic equipment
1kg weight pressure

25. Abrasion & Micro Scratch Resistance
Tougher surfaces last longer.
Abrasion and micro scratch resistance are key in the water-based coatings industry.
Better abrasion and micro scratch resistant coatings last longer and require less
frequent recoating.
Rota Hub Scratch Test
In this procedure 1kg Hammer covered in Scotch Brite pads and moved linearly fifty
times across a surface area. In this case, too, the loss in gloss is used for evaluation.
Using between 20-30% Relca® PD-805, gloss
loss after micro scratch test is minimized.

26. Pencil Hardness
Relca® PD-805 improves hardness of coatings – making them tougher and
more durable. As a result, coatings can better resist knocks and scratches
giving lasting performance to the coating system and higher protection to
substrate full stop at the end.
6h Pencil number with a weight load 750g: Results using Relca® PD-805
improves Pencil Hardness Test.
Clear Lacquer + plus 30% Relca® PD-805

27. Relca® PD-805 new
generation of matting agents
Conclusions

28. Conclusions
Relca® PD-805, the new matting resin expected to offer the
optimal balance of performance and aesthetic features.