PC90
PC90 Hardener for PU floor (parquet) lacquer
Aromatic isocyanate hardener (component B) for PTL90 polyurethane floor lacquer. Solids 42 ± 1 % (among the highest of the Technocolor hardeners). Added to the lacquer at 2:1 (50 % on the lacquer, by weight and by volume). Being aromatic, it yellows over time — not for white enamels or pale/whitewashed timber.
- Component B for PTL90 UM (10 gloss) and PTL90 SM (30 gloss) PU floor lacquer
- Finishing parquet, stairs, treads and other high-wear surfaces as part of the PTL90 system
Ask about PC90
Answers are based on the PC90 data and the products it mixes with.
Mixing matrix
- % by weight: 50 %official% by volume: 50 %official
Always; fixed ratio, do not vary.
PC90 is the only hardener listed for PTL90; no other use is documented. Example (by weight, % of the lacquer): 1000 g lacquer + 500 g PC90 + 200–300 g thinner (S70/S80; S50 also allowed for UM).
- % by weight: 20–30 %official% by volume: 25–35 %official
Added to the lacquer+PC90 mix to reach spray viscosity.
Do not thin the hardener on its own — add thinner to the already catalysed lacquer.
- S50Thinner% by weight: 20–30 %official% by volume: 25–35 %official
Official page and dealer list S50 (universal, normal evaporation) as an option for PTL90 UM only; SM lists S70/S80 only.
| Role | Material | % by weight | % by volume | When |
|---|---|---|---|---|
| base | PTL90 UM / PTL90 SM | 50 %official | 50 %official | Always; fixed ratio, do not vary.PC90 is the only hardener listed for PTL90; no other use is documented. Example (by weight, % of the lacquer): 1000 g lacquer + 500 g PC90 + 200–300 g thinner (S70/S80; S50 also allowed for UM). |
| Thinner | S70 / S80 | 20–30 %official | 25–35 %official | Added to the lacquer+PC90 mix to reach spray viscosity.Do not thin the hardener on its own — add thinner to the already catalysed lacquer. |
| Thinner | S50 | 20–30 %official | 25–35 %official | Official page and dealer list S50 (universal, normal evaporation) as an option for PTL90 UM only; SM lists S70/S80 only. |
Percentages are per 100 parts of component A.
Characteristics
- Solids
- 42 ± 1 %dealer
- Chemistry
- aromatic polyisocyanate (dark-green group: «ароматические отвердители для ПУ грунтов и матовых лаков»)catalog
- Hardness vs elasticity
- mid-left on the fast/hard ↔ slow/elastic axis (between PC210 and AC41)catalog
- Yellowing resistance
- low — rank 4 of 10 on the catalog scale (PC72 → PC10 → PC20 → PC90 → PC25 → PC60 → PC210 → AC200 → AC41 → AC40, least to most resistant)catalog
- Pot life
- 4 hdealer
- Drying · Touch-dry
- 30 mindealer
- Drying · Full cure
- 12–18 hdealer
- Drying · Conditions
- 20 °C
- Moisture sensitivity
- high — reacts with air/water humidityrecommended
Application
Mixing component
- Why ru
- Соотношение и жизнеспособность — по данным дилера/производителя; порядок смешивания, выдержка и процеживание — стандартная практика мастерской для 2К ПУ.
PC90 is never applied on its own. Sequence: stir PTL90, add PC90 at 2:1, mix thoroughly, then add S70/S80 (S50 also allowed for UM), let it stand 5–10 min, strain (125–190 µm). Use the mix within 4 h at 20 °C.
HVLP
- Nozzle
- 1.5–1.7recommended
- Pressure · air
- 2–2.5 bar at gun inletrecommended
- Consumption
- 150official
Airmix (air-assisted airless)
- Nozzle
- 0.23–0.28recommended
- Pressure · fluid
- 60–100recommended
- Pressure · air
- 1–2recommended
Process and compatibility
- Goes with
- PTL90 UM, PTL90 SM
- Temperature and humidity
- 18–25 °C, RH ≤ 70 %; keep can closedrecommended
- Don'ts
- Don't use over white enamels or on pale/whitewashed timber — it yellows (per dealer)
- Don't change the 2:1 ratio — too little gives a soft film, too much a brittle one
- Don't leave the can open — air moisture ruins the hardener
- Never pour leftover mix back into the hardener or lacquer can
Storage
- Packaging
- 0.5 L,2.5 L,12.5 Ldealer
- Storage temperature
- +5…+25 °C, tightly closed original can, dry placerecommended
- Shelf life
- typically ~12 months in sealed can; discard if cloudy, gelled or skinnedrecommended
Safety: Contains isocyanates: may cause skin and respiratory sensitisation. Spray in a booth with extraction, wear a carbon-filter respirator (A2P2 or air-fed), nitrile gloves and goggles. Flammable.
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).
- dealer page: name, application area, solids 42 ± 1 %, packaging 0.5/2.5/12.5 L
- official PTL90 SM: PC90 50 % w / 50 % v, S70/S80 20–30 % w / 25–35 % v
- official PTL90 UM: PC90 50 % w / 50 % v; S70/S80/S50 20–30 % w / 25–35 % v
- dealer PTL90 SM: PC90 50/50, S80/S70 20–30 w / 25–35 v, pot life 4 h, touch 30 min, full 18 h, yellowing warning
- dealer PTL90 UM: PC90 50/50, S80/S50/S70 20–30 w / 25–35 v, pot life 4 h, touch 30 min, full 12 h
Not covered by the sources
- no official t-color.ru page
- no TDS/SDS PDF found (web-search budget exhausted)
- density
- viscosity of PC90
- NCO content / exact chemistry
- official shelf life
- official storage temperature
- official application temperature/RH
- no Technocolor finishing schedule uses PC90/PTL90
- use with any product other than PTL90 undocumented