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Polyurethane Molding Rubbers

Thu Jul 03 09:28:30 CST 2014

Description of Polyurethane Molding Rubber

 

Polyurethane mold rubbers consist of a Part A and a Part B that, after mixing, cure at room temperature to flexible, high-strength rubbers. Polyurethane rubbers make durable, easy releasing molds for casting plasters and waxes without release agents, but, when used with proper release agents, are also excellent for casting concrete, epoxy, polyester, polyurethane and acrylic.

 

Features of Polyurethane Molding Rubber

 

1. High strength

2. Low to moderate cost

3. Many versatile formulas

 

Applications of Polyurethane Molding Rubber

 

  1. Casting most materials.
  2. Acceptable for some resins.
  3. Not acceptable for molten metals.

 

Data of Polyurethane Molding Rubber

 

Item No.

MCPU-50

Mix ratio

1.4 : 1

Part A color

Yellow

Part B color

Clear

Pour time (mins)

30

Demoud time (hrs)

7-8

Full cure (hrs)

24

Density (g/cm3)

1.05

Mixed viscosity (cps)

2000±300

Hardness (shore A)

50

Tensile strength (Mpa)

6.72

Elongation (%)

724

Shrinkage

N/A

Tear strength (N/mm)

50.22

 

Storage of Polyurethane Molding Rubber

 

For best results, store products in unopened containers at room temperature (60-90°F/15-32°C). Use products within six months. Parts A and B react with atmospheric moisture and, therefore, should be used up as soon as possible after opening.