ACRYLIC COMPOUND FOR BLACK – OUT COATING

AVCO-COAT BLAI is an aqueous acrylic compound used for producing black-out effects on textile fabrics by means of crushed foam coating application in the triple coat technique.

AVCO-COAT BLAI is a one-shot black-out coating compound, containing all foaming agents and stabilizers needed for the crushed foam coating process.

SPECIFICATIONS:

Appearance	Viscous white paste.
Chemical nature	Aqueous compound containing acrylic latex, thickeners, inorganic fillers and additives.
Ionic type	Anionic
Solubility	Dispersible in water.
pH (as it is)	9.0 – 10.0
Density	1.02-1.04
Viscosity (dPa.S)	15-20 (Haake viscotester)
Compatibility	Is not compatible with cationic products.
Storage	1. Sensitive to frost. Once frozen the product cannot be re-used. 2. Partially used drums should be re-sealed. 3. The shelf life in proper storage conditions is at least 6 months.

PROPERTIES & USES:

1. AVCO-COAT BLAI produces flexible film which is resistant to washing and dry cleaning.

2. AVCO-COAT BLAI is designed for the foam coating technique.

3. AVCO-COAT BLAI is an aqueous preparation, and does not release harmful vapours during the drying process.

4. When applied in the proper way, the product is producing an excellent black-out effect, used for curtains, blinds, window shades, upholstery fabrics, bags, and other technical items.

5. AVCO-COAT BLAI is a one-shot compound (“all-in”) based on AVCO-COAT BLAI pre-mixed with an optimized concentration of stabilizers and foaming agents.

APPLICATION

For producting the black out effect prepare the basic coating paste by blending with foaming agents, foam stabilizer and a cross-linking agent.

The basic coating paste should be further mixed with AVCO-LOR WHITE T or AVCO-LOR BLACK MF pigments, as indicated in the following tables.

BASIC FOAM COATING PASTE

AVCO-COAT BLAI	990
AVCO-FIXATOR HM	10
	1000

1. Mix well with a low speed mixer.

2. Adjust to pH 9.5-10 with ammonia solution.

3. If needed viscosity can be increased with AVCO-THICKENER A.

4. For the best black-out effect a triple coating technique should be used: Apply a base-white coat followed by a second black coat and finally a third white top-coat.

5. Prepare the three coating pastes according to the following table:

	First coat	Second coat	Third coat
Basic coating paste	920	900	920
AVCO-LOR WHITE TD	80	–	80
AVCO-LOR BLACK CH	–	100	–

pH	9.5 – 10	9.5-10	9.5-10
Viscosity (d.Pa.s)	20 – 40	20-40	20-40
Foam weight (g/l)	200 – 220	210-230	220-240
Coat height (mm)	0.3	0.6	0.8
Drying time (sec) at 100°C	60	90	120

6. The top coat can be tinted with AVCOLOR pigments.

7. Filter to remove any dried particles.

8. Foaming is done with an industrial foam generator to foam density of 200-240 g/litre.

9. Coating is done with a doctor knife and other coating ranges.

10. Apply to the fabric about 35-70 gr/m²per coat.

11. The wet foam coat should be dried at 100-110°C and subsequently cold pressed (crushed) before further coat can be applied. The white layers can be tinted with any pigment from the AVCO-LOR pigment dispersions range to the desired colour (check light fastness properties).

12. After completion of the coating processes curing is done by fixation in the oven at 150-160°C for 2-3 minutes.

13. If needed the curing can be combined with a final finishing process such as water and oil repellency.

14. If desired a special coating can be done on the other side of the fabric with tinted or untinted AVCO-COAT AC-B.

15. Partially used drums should be resealed with the original cover.

16. Add AVCO-FIX HM to the AVCO-COAT BLAI only before use.

17. Ready made foam coating paste should be used as soon as possible. Remainings should be used within a few days.