PU material for concrete mold (CPU-49-PU20B-A/B)

Key feature

● Hardness: 50-60A

● Mixing ratio: 2:1

● Pot life: 30-60min

● Stable size

Good resistance for the cement alkalinity

● Easy operation

Application

Waterproof and insulation electronic and electric products, building materials, modules, bonding, paint, and industrial casting materials, big mold RC, GRC-lithoidstone, sett, craftstone series tile, molding plate, slate, and cement handiwork copy, etc.

System Specification

Item No.

CPU-49-PU20B-A

CPU-49-PU20B-B

Appearance

Brown or Green

Colorless

Viscosity

65000±25000 CPS

7000±2000 CPS

Package

CPU-49-PU20B-A

20 kgs / drum

CPU-49-PU20B-B

10 kgs / drum

Product Characteristic & Processing parameters

Mixing Ratio (wt : wt)

2 : 1

Pot life

30~60 min

Tack free time

4~6 hr

Demold time

24 hr

Hardness

50-60A

Tensile Strength

Above 23 kgf/cm2 

Elongation

Above 250%

Tear Strength

Above 12 kgf/cm2

Linear Shrinkage

0.2%

Characteristics

1.  Hardness: 50~60 Shore A
2.  Low cost
3.  The size stable
4.  Good resistance for the cement alkalinity

Operation Process

1.

Stir CPU-49-PU20B-A about 1 2 minutes for ready-use first (material will slightly precipitate).

2.

Weigh CPU-49-PU20B-B and then pour it into mixing container and let it lubricate the sides of the mixing container first.

3.

Weigh the appropriate amount of CPU-49-PU20B-A and then pour it into the same container, mix thoroughly by agitator at 100 200 rpm for at least 1 2 minutes making sure that you scrape the sides and bottom of the mixing container several times. Please do not agitate with high speed.

4.

Put the mixture into the vacuum to degas about 1 2 minutes and then exhaust about 2 times. Vacuum degassing prior to pouring mixture will further reduce entrapped air.

5.

Release agent is necessary to facilitate demolding when casting into or over most surfaces.

6.

Take out the mixture and pour it into the model. Let the mixture seek its level up and over the model. A uniform flow will help to minimize entrapped air. The liquid mixture should level off to wait for the naturally dry. After the completely dry, you can demold.

Note

1.

The container of CPU-49-PU20B-B must be sealed tightly after the use; otherwise, it will become stiff and can not be used anymore.

2.

The pot life is short, so please pay the most careful attention while using it.

Notice: These values are based on the test of our present laboratory test specimens.