Casting Polyurethane resin

Type

D3125

D3130

D3136

DT3136

D3140

D3143

D3145

NCO content /%

2.1±0.1

3.0±0.1

3.6±0.1

3.6±0.2

4.0±0.2

4.3±0.2

4.5±0.2

Appearance at 20℃

White solid

White solid

White solid

White solid

White solid

White solid

White solid

MOCA/g 

(100g prepolymer)

7.2

8.6

10.5

10.5

11.7

12.5

13.2

Viscosity (/85℃) /mPa·s

2800

2200

1800

2150

1150

1300

1200

Mixing temperature/℃

(Prepolymer/MOCA)

85/120

85/120

85/120

80/120

80/120

80/120

80/120

Gel time /min

16

12

9

10

8

8

7.5

Post cure time(100℃ )/h

10

10

10

10

10

10

10

Hardness (Shore A)

76±2

80±2

85±1

87±1

90±1

92±1

92±1

100% Modulus /MPa

3.4

3.8

4.2

5.1

5.3

6.3

6.7

300% Modulus /MPa

4.1

6.4

8.3

8.5

10.1

11.8

12.5

Tensile strength /MPa

40

46

48

49

50

50

52

Elongation at break  / %

700

680

670

650

660

630

610

Tear strength

(without nick)/KN/m

55

70

75

85

84

105

95

Tear strength

(with nick)/KN/m

19

27

34

38

40

43

42

Rebound  / %

42

38

39

36

34

37

32

Specific gravity(25℃)(g/ cm³)

1.25

1.25

1.26

1.26

1.26

1.27

1.27

Abrasion loss /mm³

33

42

40

40

39

48

53