PPG + TDI

Key feature

● Hardness: 55-97A, 72D

● Curing agent: MOCA

● Hot casting polyurethane prepolymer

● Good elasticity

● Good hydrolysis resistance

● Good mechanical property

Application

Hot casting polyurethane prepolymer can be used on the following applications: Bushes, Castor Wheels, Couplings, Conveyor Rollers, Cutting Boards, Fork-lift Tyres, Gears, Grading Screens, Pneumatic and Oil Seals, Scrapers, Skate Wheels, Wire Guides.

Introduction

"PU Casting Elastomer" polyurethane prepolymer can be cured by reacting with a polyamine or a polyol hardener. The molding process is composed of pre-heating, degassing, mixing with a hardener, pouring into the mold, curing, demolding and post curing.

PPG + TDI polyurethane prepolymer
 

CPU-1060

CPU-1070

CPU-2079

CPU-1085

CPU-1090C

CPU-2095

CPU-2172

Hardness (Shore A)

55 - 68

67 - 74

76 - 82

 82 - 88

86 - 92

90 - 97

61 - 72D

NCO Content (%)

2.0 - 2.6

2.65 - 3.45

3.4 - 4.2

 4.4 - 5.0

4.0 - 4.8

5.5 - 6.1

7.2 - 8.4

Viscosity (CPS/25oC)

13,500
±6,500

5,000
±1,000

7,750
±2,250

 5,250
±1,250

32,000
±8,000

47,000
±6,000

60,000
±5,000

PHR of MOCA (%)

5.74 - 7.25

7.7 - 8.8

11.5 - 12.5

13.8 - 14.8 

12.7 - 13.5

18 - 19

24.5 - 25.5

Working Temperature
(Prepolymer) (oC)

70 - 80

70 - 80

70 - 80

 70 - 80

70 - 80

70 - 80

70 - 80

MOCA Temp.

100 - 120

100 - 120

100 - 120

 100 - 120

100 - 120

100 - 120

100 - 120

Mold Temp. (oC)

70 - 90

70 - 90

70 - 90

 70 - 90

70 - 90

70 - 90

70 - 90

Pot-Life (Min)

4 - 6

4 - 6

4 - 6

 8 - 10

4 - 6

4 - 6

4 - 6

Tensile Strength (kg/cm2)

30 - 70

60 - 120

100 - 150

 200 - 300

200 - 300

200 - 350

250 - 350

Elongation (%)

400 - 500

400 - 600

550 - 600

 400 - 600

500 - 600

350 - 450

150 - 300

Tear Strength(kg/cm)

20 - 60

50 - 80

80 - 110

80 - 120

90 - 130

120 - 160

160 - 220

 

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