40 Shore A Liquid Polyurethane Rubber for Making Concrete Wall Block Molds
- $6.85 / 200 - 399 kilograms
$6.75 / 400 - 799 kilograms
$6.65 / 800 - 1999 kilograms
$6.45 / >=2000 kilograms - 200 kilograms
- Dongguan Mingcheng Electronic Technology Co., Ltd.
- Guangdong, China
- Ms Amy Tse
| Place of Origin: | Guangdong China; | hardness: | 40 shore A; |
| pot life: | 25-30 mins; | Model Number: | MCPU-40 A/B; |
| Type: | PU; | Packaging Detail: | 20kg per drum 400 drums per pallet 800kg per per pallet; |
| Application: | making molds for concrete wall block; | Payment Terms: | L/C,Western Union,T/T,Paypal; |
| Package Preview: | ; | Package: | 20kg/drum; |
| curing time: | 8-10 hrs; | Viscosity: | 2500 +/- 200 cps; |
| Supply Ability: | 8000 Kilogram/Kilograms per Day liquid urethane rubber; | mix ratio: | 1 : 1; |
| Features: | Non Deformation, durable, high strength; | Product name: | Liquid Polyurethane Rubber; |
| Brand Name: | MC Silicone; | Port: | Dongguan; |
| Shelf Life: | 6 months; |
Liquid Polyurethane Rubber for Making Wall Block Molds :
There are many different formulations of polyurethane rubbers for mould making. The polyurethane casting rubber can be pure or filled with special mineral charges. Are available different hardness from 40Shore A to 90 Shore A.
Applications of Liquid Polyurethane Rubber for Making Wall Block Molds:
Substitute for Silicon rubber to make the mould of “cultural stone”. It also applies to electrical equipment potting, rubber rollers, Ski and snowboard ,rubber plates, rubber wheels, shoe models and others.
Technical Datasheet
|
A |
Type | MC-PU40 A |
| Appearance | Colorless or light yellow transparent liquid | |
| Viscosit(y 30℃)mPa·s/ | 2500±300 | |
|
B |
Type | MC-PU40 B |
| Appearance | Light yellow liquid | |
| Viscosity(30℃)/mPa·s | 560±200 | |
| Ratio A:B(mass ratio) | 1:1 | |
| Operation temperature/℃ | 25-40 | |
| Gel time(30℃)*/min | 20-30(variable) | |
| Appearance | Light yellow | |
| Hardness (shore A) | 40±2 | |
| Tensile strength/MPa | 4-7 | |
| Elongation at break/ % | 500-600 | |
| Tear strength/(kN/m) | 22-28 | |
| Rebound/ % | 32-35 | |
| Specific gravity(25℃)(g/ cm3) | 1.18 | |
1. Good flow ability and long working time
2. Medium hardness
3. High tear and tensile strength
4. Easy de-mould from complex replica parts
5. Acid and alkali-resistance
6. Low linear shrinkage
Mixing:
Shake both A and B sides vigorously.
Measure out equal parts, by volume, of A and B into clean plastic or metal containers.
Combine both sides into a third clean mixing container and mix vigorously for at least one minute, taking care to scrape the sides and bottom of the mixing container with your mixing utensil, until the product is one uniform color.
NOTE: To ensure thorough coverage, lightly brush the release agent with a soft brush over all surfaces of the model. Follow with a light mist coating and let the release agent dry for 30 minutes. Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.
Measuring & Mixing...
Liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal or plastic. Materials should be stored and used in a warm environment (73°F/23°C).
IMPORTANT: Stir Part B thoroughly before dispensing. After dispensing equal amounts of Parts A and B into mixing container, mix thoroughly for at least 3 minutes making sure that you scrape the sides and bottom of the mixing container several times.
If Mixing Large Quantities (16 lbs./7 kgs. or more) at one time, use a mechanical mixer (i.e. Squirrel Mixer or equal) for 3 minutes followed by careful hand mixing for one minute as directed above. Then, pour entire quantity into a new, clean mixing container and do it all over again.
Although this product is formulated to minimize air bubbles in your the cured rubber, vacuum degassing prior to pouring rubber will further reduce entrapped air.
Tips:
Always wear a respirator or self –contained breathing apparatus when working with urethanes.
Use between 65F and 75F in a humidity-controlled environment.
AeroMarine Products Concrete Molding and Stamping Rubber 75A Urethane is moisture sensitive.
Use only clean plastic and/or metal mixing utensils and containers.
Do not use paper or wood.
Re-cap the bottles immediately after use.
Extend-It aerosol nitrogen blanket can be used to protect the product from moisture contamination.
Never mix less than about 3 ounces of product, as this ratio is hard to measure and will take longer to cure as the exothermic reaction does not generate much heat at this volume.
Avoid mixing with drill motors because of the friction they generate, mixing with electric drills can start the exothermic cure process and cause the product to cure in the mixing container.
It is always best to mix the material by hand, with a plastic or metal mixing utensil.
Don’t vary the mix ratio. Unlike some polyester resins, altering the mix ratio to vary the cure cycle will not work with urethanes.
Mix in clean plastic containers. Paper cups and wooden mixing utensils may contain moisture which can adversely affect the urethane rubber. Avoid waxed paper cups because the wax may melt and contaminate the rubber.
Air bubbles in urethanes are almost always caused by moisture. Do everything possible to avoid moisture getting into the mix. Replace the lids onto the containers promptly after use. Do not use the urethane rubber during rainy days or times of high humidity. Avoid pouring against an unsealed water based product such as plaster or hydrocal. Seal plaster or hydrocal with a product like Krylon Clear Acrylic.
Avoid mixing a large batch- The larger the batch, the more exotherm or heat is generated in the cure cycle. If you are making a large mold, mix small batches to make the process more manageable.
Shake or stir well before use- The liquid components may settle in the containers during storage. Shake or stir the components separately and thoroughly before mixing. Let it sit a few minutes to let any bubbles rise to the surface after shaking the container.
Package of Liquid Polyurethane Rubber for Molding & Casting :
20kg/drum, 25kg/drum or 200kg/drum
Professional factory of Liquid Polyurethane Rubber for Molding & Casting :
We are manufacturer, and specialized in manufacturing different hardness, different viscosity silicone rubber and polyurethane rubber, we are competitive in price with good quality.
If you are looking for RTV2 Liquid Silicone Moldmaking Rubber, Please Click the Picture Below.
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