PTS50
PTS50 clear thixotropic PU primer
Two-pack clear thixotropic polyurethane primer. Fast drying, high solids (official site). The catalog adds: very good sag and run resistance, good clarity, elasticity and shrink resistance, flows out well on vertical surfaces. Dealer: suits carved work, balusters, grilles and chairs.
- vertical surfaces
- chairs and cots in various species
- assembled pieces
- carvings, balusters, grilles
- sealer under PTL50 PU lacquer over stained beech (chair-finishing schedule)
Mix calculator
Ask about PTS50
Answers are based on the PTS50 data and the products it mixes with.
Mixing matrix
- % by weight: 50 %official% by volume: 50 %official
always, fixed 50 %. Official: PC25/PC20; dealer lists PC25; catalog: PC20, PC25.
Both are aromatic hardeners for PU primers (catalog p.19). PC25 sits at the far left of the chart (fast/hard), PC20 just to its right; PC25 is slightly more yellowing-resistant than PC20, but both yellow with age — keep in mind on pale timber under clear coats.
- S50Thinner% by weight: 20–25 %official% by volume: 20–25 %official
standard thinner (medium evaporation); dealer and catalog agree
Weight and volume figures are identical in the official data.
- C50Hardener% by weight: 50 %schedule
per the 'Beech chair finishing (PU)' schedule
Code C50 appears nowhere else (not on the site or at the dealer) — probably a legacy hardener code. Use PC25/PC20 at 50 %.
- S80Thinner% by weight: 20 %schedule
per the chair schedule (forced drying at 30–35 °C); S80 is the slow thinner, for heat and large pieces
Slow thinner raises sag risk; the thixotropy offsets it.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| Hardener | PC25 / PC20 | 50 %official | 50 %official | always, fixed 50 %. Official: PC25/PC20; dealer lists PC25; catalog: PC20, PC25.Both are aromatic hardeners for PU primers (catalog p.19). PC25 sits at the far left of the chart (fast/hard), PC20 just to its right; PC25 is slightly more yellowing-resistant than PC20, but both yellow with age — keep in mind on pale timber under clear coats. |
| Thinner | S50 | 20–25 %official | 20–25 %official | standard thinner (medium evaporation); dealer and catalog agreeWeight and volume figures are identical in the official data. |
| Hardener | C50 | 50 %schedule | — | per the 'Beech chair finishing (PU)' scheduleCode C50 appears nowhere else (not on the site or at the dealer) — probably a legacy hardener code. Use PC25/PC20 at 50 %. |
| Thinner | S80 | 20 %schedule | — | per the chair schedule (forced drying at 30–35 °C); S80 is the slow thinner, for heat and large piecesSlow thinner raises sag risk; the thixotropy offsets it. |
Percentages are per 100 parts of component A.
Characteristics
- Viscosity
- 70 ± 5 sdealer
- Thixotropy
- yesofficial
- Pot life
- 4dealer
- Drying · Touch-dry
- 20dealer
- Drying · Sand or stack · At 20 °C
- 3–4 hrecommended
- Drying · Full cure
- 8dealer
- Drying · Conditions
- 20 °C
- Elasticity
- elastic, shrink resistantcatalog
Colours
- PTS50 · clear
Application
HVLP
- Nozzle
- 1.7–1.9 (typ. 1.8) mmrecommended
- Pressure · air
- 1.8–2.2 barrecommended
- Pressure · Cap
- 0.5–0.7 barrecommended
- Spray viscosity
- 22–28 srecommended
- Consumption
- 120–150 g/m²official
- Wet film
- 120–150 µmrecommended
- Coats
- 2 coats, sanding between (K120)schedule
- Flash-off
- 10–20 minrecommended
- Recoat
- after 2 h at 30–35 °C and sanding with K120schedule
- Sanding between coats
- sanding pads)schedule
Gun 15–20 cm from the surface, 50 % overlap, fan fully open. Thixotropic — on a 1.5 mm tip you get dry spray and poor build.
Conventional spray
- Nozzle
- 1.8–2 mmrecommended
- Pressure · air
- 3–4 barrecommended
- Spray viscosity
- 20–25 srecommended
- Consumption
- 120–150 g/m²official
Conventional air spray: transfer efficiency up to 40 % (methods page). For chairs and spindles HVLP or electrostatic is better value.
Airmix (air-assisted airless)
- Nozzle
- 0.23–0.33 mmrecommended
- Pressure · fluid
- 20 barofficial
- Pressure · air
- 1–2 barofficial
- Spray viscosity
- 25–35 srecommended
- Consumption
- 120–150 g/m²official
Not listed by the manufacturer as its own method — a production-line recommendation.
Electrostatic
- Nozzle
- 0.23–0.28 mmrecommended
- Pressure · fluid
- 20 barofficial
- Pressure · air
- 1–2 barofficial
- Consumption
- 120–150 g/m²official
Officially listed for PTS50 (120–150 g/m²). Typical for chairs, table legs and cots. The mix's conductivity may need a thinner adjustment — check with Technocolor.
Process and compatibility
- Substrate preparation
- шлифование K60, K80; краситель CTH (CTH 100 : CFH2 800 : вода 1200, 80–100 г/м²), сушка 30 мин при 20–25 °Cschedule
- Goes over
- CTH
- Goes under
- PTL50
- Sanding
- K120 after each primer coatschedule
- Temperature and humidity · Application
- 18–25 °Crecommended
- Temperature and humidity · Forced drying
- 30–35 °Cschedule
- Don'ts
- don't use it as the main sealer on big flat horizontal panels — thixotropic coatings flow out worse and can leave open pores or orange peel (official characteristics page)
- don't use the mix past its 4 h pot life at 20 °C
- don't sand while the paper still clogs — give it more time
Storage
- Packaging
- 1 л,5 л,25 лdealer
Safety: 2K PU: the hardener contains isocyanates. Spray in a booth, wear a carbon respirator (A2P2/A2P3) or air-fed mask, gloves and goggles. Flammable. Don't seal leftover mixed material. (General PU practice; no SDS found.)
Used in finishing systems
Mixed into
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).
- properties, methods, hardener PC25/PC20 50/50 %, thinner S50 20–25 %
- solids 44±1 %, viscosity 70±5 s VZ-4, pot life 4 h, touch 20 min, full 8 h, packaging
- beech chair PU schedule: PTS50 100 : C50 50 : S80 20, 150 g/m², 2 h at 30–35 °C, sand K120
- application method descriptions
- definitions; thixotropic coatings flow worse on flat panels
Not covered by the sources
- shelf life / storage temperature
- density
- exact sand time at 20 °C (only schedule 2 h at 30–35 °C)
- dust-free time
- hardness, chemical resistance, lightfastness values
- what code C50 in the chair schedule is
- no Technocolor TDS PDF found
- viscosity method only 'ВЗ-4' (no tolerance on spray viscosity)