Topcoat
HYDRHOLAC AD-1 is an aqueous dispersion of a high performance silica with a low Tg (-43°C) acrylic polymer. HYDRHOLAC AD-1 is designed to be the "dull" component in a typical high performance automotive finish complemented by a "bright" component which can be either an acrylic emulsion or polyurethane dispersion. Additionally, HYDRHOLAC AD-1 is a natural fit for furniture topcoats due to its high performance and soft feel. Reference starting point topcoat formulations follow the physical property section below.
HYDRHOLAC AD-1 can also be used as the major resin in combination with polyurethane dispersions for basecoat finishing. HYDRHOLAC AD-1 is especially recommended for basecoats containing isocyanate crosslinkers, as it provides increased pot-life, or when embossing on the topcoat is practiced.
Key application and physical properties of finishes formulated with HYDRHOLAC AD-1 are:
Topcoat Properties
- outstanding cold flex
- excellent aesthetics
- good wear performance
- excellent yellowing resistance
- solvent free
- low cost
- enhanced flow out
Basecoat Properties
- excellent plating properties
- excellent embossing properties
- stable with isocyanate
- softer than SB-300
- good mechanical stability
- low cost
- enhanced flow out
HYDRHOLAC AD-1 offers a wide balance of properties making it suitable for all leather types and is compatible with Dow binders and auxiliaries.
It is important to note finishes based on HYDRHOLAC AD-1 can meet high wear properties and as with all acrylics does not contain n-methyl pyrrolidone.
HYDRHOLAC AD-1 is supplied as a medium-viscosity liquid that is particularly easy to handle and formulate. As with many dulling agents, it is best to always stir AD-1 prior to use and to minimize extended storage conditions.
These properties are typical but do not constitute specifications.
|
Appearance
|
milky/translucent liquid
|
Solids content, %
|
23.0-25.0
|
pH
|
8.5-9.3
|
Specific gravity
|
1.06
|
Density, lb/gal (US)
|
8.8
|
Ionic charge
|
anionic
|
Viscosity, cP
|
400-1500
|
Resin solids
|
17.8%
|
Silica solids
|
6.2%
|
The value of HYDRHOLAC AD-1 as a dull binder for automotive finishing is enhanced by its compatibility with the auxiliary components commonly used to formulate intermediate and final topcoat finishes. Examples of typical finishing formulations based on HYDRHOLAC AD-1 follow:
|
|
Ingredient
|
Parts per 100
|
Water
|
11.0
|
HYDRHOLAC AD-1
|
37.0
|
HYDRHOLAC CL-1
|
17.4
|
Additive 2229W
|
6.8
|
Euderm® Colours B-N/C-N
|
6.8
|
ACRYSOL™ RM-1020/water (1:1)
|
6.0
|
Aquaderm® XL 50
|
15.0
|
|
|
Ingredient
|
Parts per 100
|
Water
|
18.7
|
Aquaderm® Fluid H
|
1.0
|
HYDRHOLAC AD-1
|
37.0
|
Bayderm® Finish 61 UD, 82 UD, 85 UD
|
16.1
|
Additive 2229W
|
5.7
|
Euderm® Colours B-N/C-N
|
3.0
|
ACRYSOL™ RM-1020 thickener/water (1:1)
|
3.5
|
Aquaderm® XL 50
|
15.0
|
|
|
Ingredient
|
Parts per 100
|
Water
|
18.4
|
Aquaderm® Fluid H
|
1.0
|
HYDRHOLAC AD-1
|
38.0
|
Bayderm® Finish 61 UD, 82 UD, 85 UD
|
17.7
|
Additive 2229W
|
5.9
|
ACRYSOL™ RM-1020 thickener/water (1:1)
|
4.0
|
Aquaderm® XL 50
|
15.0
|
Note: Unpigmented topcoats should contain a sufficient level of PUD to maintain film clarity on flexing.
|
|
|
Ingredient
|
Parts per 100
|
Euderm® Colours B-N/C-N
|
10.0
|
10.0 |
Water
|
5.5
|
9.0 |
Euderm® Nappasoft S
|
25.0
|
25.0 |
Bayderm® Bottom 51 UD
|
28.5
|
-- |
Bayderm® Bottom DLV
|
--
|
25.0 |
HYDRHOLAC AD-1
|
25.0
|
25.0 |
Bayderm® Fix UCL
|
3.0
|
3.0 |
Water
|
3.0
|
3.0 |
|
