PTMG + TDI

Key feature

Hardness: 80-95A, 70D

Curing agent: MOCA

Hot cast polyurethane elastomer

High tensile strength

Good hydrolysis resistance

Good mechanical property

Application

The hot cast polyurethane is suitable to 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" urethane elastomer is hot cast polyurethane. It 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.

PTMG + TDI hot cast polyurethane

 

CPU - 42L

CPU - 100L

CPU - 167L

CPU - 325L

Hardness (Shore A)

77 - 89

86 - 92

92 - 98

59 - 72D

NCO Content (%)

2.95 - 3.55

4.1 - 4.6

6.0 - 6.6

8.9 - 9.5

Viscosity (CPS/25oC ) 

41,000±9,000

25,500±7,500

10,000±5,000

3,750±1,250

PHR of MOCA (%)

10.2 - 11.2

13.5 - 14.5

18.12 - 19.33

27 - 29

Working Temperature (Prepolymer) (oC)

70 - 80

70 - 80

70 - 80

70 - 80

MOCA Temp.

100 - 120

100 - 120

100 - 120

100 - 120

Mold Temp. (oC)

70 - 90

70 - 90

70 - 90

70 - 90

Pot-Life (Min)

4 - 6

4 - 6

4 - 6

4 - 6

Tensile Strength (kg/cm2)

290-430

300-450

350-500

350-500

Elongation (%)

545-645

400-500

350-450

250-350

Tear Strength (kg/cm)

65-105

80-120

120-160

210-260

 

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