PPS50
PPS50 white thixotropic PU primer
Two-pack white polyurethane primer, thixotropic, with high hiding power. Holds well on vertical surfaces without runs or sags, fills grain well, levels the surface and resists shrink-back. Cured with PC20 (the official site also lists PC60) at 50 % by weight, thinned with S50.
- vertical surfaces
- cots and chairs in various woods
- MDF
- finishing assembled pieces
- base coat under coloured PU enamels
- base under APL800XX metallic-effect enamel (special effects)
Mix calculator
Ask about PPS50
Answers are based on the PPS50 data and the products it mixes with.
Mixing matrix
- PC20Hardener% by weight: 50 %official% by volume: 70 %official
standard hardener (aromatic)
Fixed ratio, don't eyeball it. Aromatic hardener yellows in light - irrelevant for a primer that gets topcoated.
- PC60Hardener% by weight: 50 %official% by volume: 70 %official
alternative to PC20 (listed on the official site only)
PC60 is the non-yellowing, fast/hard hardener on the catalogue chart. Dealer and catalogue list PC20 only.
- S50Thinner% by weight: 20–30 (typ. 25) %official% by volume: 35–50 %official
universal, normal evaporation
S50 is the default thinner; it does not change cure time.
- S80Thinner% by weight: 20–30 %recommended
heat above ~25 °C, large panels
Not listed by Technocolor. Even a thixotropic primer can sag on verticals with a slow thinner - don't pile it on.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Hardener | PC20 | 50 %official | 70 %official | standard hardener (aromatic)Fixed ratio, don't eyeball it. Aromatic hardener yellows in light - irrelevant for a primer that gets topcoated. |
| Hardener | PC60 | 50 %official | 70 %official | alternative to PC20 (listed on the official site only)PC60 is the non-yellowing, fast/hard hardener on the catalogue chart. Dealer and catalogue list PC20 only. |
| Thinner | S50 | 20–30 (typ. 25) %official | 35–50 %official | universal, normal evaporationS50 is the default thinner; it does not change cure time. |
| Thinner | S80 | 20–30 %recommended | — | heat above ~25 °C, large panelsNot listed by Technocolor. Even a thixotropic primer can sag on verticals with a slow thinner - don't pile it on. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 72 ± 1 %dealer
- Mixed solids %
- ≈ 49 %recommended
- Viscosity
- 22 ± 2 sdealer
- Density · Part A
- ≈ 1.4 g/mlrecommended
- Density · Mixed
- ≈ 1.2 g/mlrecommended
- Pot life
- 3–4 hdealer
- Drying · Touch-dry
- 40dealer
- Drying · Sand or stack
- 8 (overnight is safer) hrecommended
- Drying · Full cure
- 8dealer
- Drying · Conditions
- 20 °C
- Thixotropy
- yesofficial
- Hiding power
- highofficial
- Shrinkage
- low - resists shrink-backcatalog
- Pore filling
- goodcatalog
Colours
- white · white
Application
HVLP
- Nozzle
- 1.8–2 mmrecommended
- Pressure · air
- 2–2.5 barrecommended
- Spray viscosity
- 20–26 s DIN4recommended
- Consumption
- 150 g/m²official
- Wet film
- ≈ 125 µmrecommended
- Coats
- 1–2 coatsrecommended
- Flash-off
- 10–20 minrecommended
- Recoat
- wet-on-wet after 10-20 min flash, or after sanding once fully dry (8 h)recommended
- Sanding between coats
- 280–320 grit Precommended
Spray, 150 g/m². Use a 1.8-2.0 mm tip; 1.5 mm will not atomise it properly. Distance 15-20 cm, 50 % overlap.
Conventional spray
- Nozzle
- 1.8–2 mmrecommended
- Pressure · air
- 3–4 barrecommended
- Consumption
- 150 g/m²official
The official sheet just says 'spray'. Transfer efficiency is low (up to 40 % per the methods page).
Airmix (air-assisted airless)
- Nozzle
- 0.28–0.33 mmrecommended
- Pressure · fluid
- 50–90 barrecommended
- Pressure · air
- 1–2 barofficial
- Consumption
- 150 g/m²official
Not listed by Technocolor, but a normal way to shoot primers in production.
Airless
- Nozzle
- 0.33–0.38 mmrecommended
- Pressure · fluid
- 120–180 barrecommended
Not listed by Technocolor. High transfer (up to 90 %), but thixotropic primer levels poorly on flats - watch for orange peel.
Electrostatic
- Nozzle
- 0.28–0.33 mmrecommended
- Pressure · fluid
- 40–80 barrecommended
- Pressure · air
- 1–2 barofficial
- Consumption
- 150 g/m²official
Officially approved, 150 g/m². Best for chairs, legs and cots. Ground the work; wood below ~8 % moisture takes the charge poorly.
Process and compatibility
- Substrate preparation
- MDF: sand P180-P220; edges P240 and a second primer coat if they drink. Solid wood: P150-P180, de-dust. Wood moisture 8-12 %.recommended
- Goes over
- bare MDF / bare solid wood
- Sanding
- 280–320 grit Precommended
- Don'ts
- don't eyeball the hardener - it's 50 % by weight
- don't use the mix past its 3-4 h pot life
- don't sand before full dry (8 h) - it clogs the paper
- don't flood horizontal panels - thixotropic primer levels poorly
Storage
- Packaging
- 1,5,25 kgdealer
Sources
Value tags: “official”, “dealer”, “catalog”, “schedule” are Technocolor data; “workshop” is from our own datasheets; “recommended” is our engineering estimate (hover to see the reasoning).
- official page: properties, spray + electrostatic 150 g/m², PC20/PC60 50 wt%/70 vol%, S50 20-30 wt%/35-50 vol%
- dealer: solids 72±1 %, viscosity 22±2 s CF-8, pot life 3-4 h, touch 40 min, full 8 h, PC20 50/60, S50 20-30, packs 1/5/25 kg
- second dealer (woodonline), same text as t-colormarket
- application methods page (airmix/airless/electrostatic pressures and uses)
- characteristics definitions (thixotropy, pot life, drying stages)
Not covered by the sources
- shelf life and storage temperature
- density (only derived)
- dust-free time (only touch-dry 40 min published)
- stack/sand time (derived from full dry)
- hardness, elasticity, chemical resistance
- PC60 volume ratio (official gives one 70 vol% figure for PC20/PC60)
- dealer volume % for S50 (20-30) conflicts with official (35-50)
- dealer volume % for PC20 (60) conflicts with official (70)
- no Technocolor TDS PDF found (web search budget exhausted; woodonline mirrors t-colormarket only)
- no official finishing schedule (information/technology) uses PPS50
- spray viscosity, nozzle and pressure are derived, not published
- woodonline.ru (product/32511) mirrors the t-colormarket table exactly (PC20 50/60, S50 20-30/20-30, 72 ± 1 %, 22 ± 2 s CF-8) - not an independent confirmation