70 shore A Liquid Polyurethane Rubber For Making Molds
Product Description
Liquid polyurethane plastic casting resin consists of A&B component, B is curing agent, and A is polyurethane prepolymer. It can also be used as a concrete or cement stamping mold as well as for making hard durable rubber parts for machinery or automotive applications.
Polyurethane casting plastics can be cast in silicone mold rubbers without any release agent, but require a release agent when cast in polyurethane rubber molds.
Applications
Substitute for making the industrial parts, It also use for furniture decorations, arts and crafts, ceiling domes, lampshade, model pieces,etc.
Features
Fast forming speed
Easy to paint/color
Fine appearance performance
Tasteless and easy to produce
Good mechanical properties
Technical Datasheet
| A | Type | MC-PU70A |
| Appearance | Colorless |
| Viscosit(y 30℃)mPa·s/ | 2000 cps |
| B | Type | MC-PU70B |
| Appearance | clear yellow |
| Viscosity(30℃)/mPa·s | 500 |
| Ratio A:B(mass ratio) | 1:1 |
| Operation time | 15-20 minutes |
| Gel time(30℃)*/min | 3 minutes |
| Appearance | Light yellow |
| Hardness (shore D) | 70±3 |
| Shrinkage rate | 3-5‰ |
| Usages | for making concrete molds |
| Shelf life | 6 months from production date in original package |
How to use
1. Mix A:B 100:100 by weight. Degas with vacuum chamber (check time).
2. Insert into pressure chamber for about 10 minutes.
3. Demold in 30 minutes, if item thickness is thin, may require longer time before demold.
Tips
1. PU resin will react faster when room temperature is higher. If you think it cure too quickly, you can put PU resin A and B into refrigerator.
2. Once pour required PU resin, tighten the cap quickly.
This product has low viscosity and has great fluidity.
Package:20Kg/drum, 200kg drum
Storage:Store in cool and dry place. If you can’t use one drum up at a time, please inject N2.The storage time of original packing is 6 months.
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