PU elastomers
Heat-resistant System Casting Materials

 

Heat-resistant system casting materials—polyester polyol, special isocyanate, similar prepolymer such as NDI、PPDI and TODI.

The product has features such as heat resistance、wear resistance、solvent resistance、dynamic property and tear resistance strength. Application range: Various industrial components with high load-bearing capacity、high speed、high deformation, such as various wheel、rubber roll、roller coaster wheel and textile friction disk.

Product Name

LMN01

LMN02

LMN03

LMN04

LMN05

LMN06

LMN07

LMN08

LMN09

 

Component A

Prepolymer Name

NR9035

NR9035

NR9040

NR9240

NR9240

NR9240

NR9242

NR9044

NR9044

 

Prepolymer NCO%

3.5±0.2

3.5±0.2

4.0±0.2

4.0±0.2

4.0±0.2

4.0±0.2

4.0±0.2

4.4±0.2

4.4±0.2

 

Melting Temperature & Time(℃/h,30kg/barrel)

60/8

60/8

60/8

60/8

60/8

60/8

60/8

60/8

60/8

 

Prepolymer Casting Temperature (℃)

85

85

85

85

85

85

85

85

85

 

Prepolymer Viscosity(cps,80℃)

3400

3400

3200

2700

2700

2700

2700

3000

3000

 

Component B

Solidifying Agent

BDO

NR93B

BDO

NR93B

C4100

C1640

MOCA

BDO

C3120

 

Casting Temperature (℃)

45

95

45

95

45

45

120

45

120

 

Viscosity(cps/120℃)

30

/

30

 

 

 

 

 

 

 

Operating Parameters

Ratio,A/B

100/3.4

100/7.8

100/4.1

100/9.0

100/9.5

100/11.4

100/12.5

100/4.5

100/12.5

 

Gelation Time at Casting Temperature(min,400g mixed materials)

8

8

6

8

8

8

8

8

12

 

Mould Temperature(℃)

110

110

110

110

110

110

110

110

110

 

Demoulding Time(min)

60

60

60

60

60

60

60

60

60

 

Finished Cure Temperature & Time(℃/h)

100/16

100/16

100/16

100/16

100/16

100/16

100/16

100/16

100/16

 

7d

Hardness (Shore A/D,25℃)

90/

93/

94/

97/

89/

94/

94/

94/

94/

 

100%Modulus(MPa)

4.8

 

7.8

 

 

 

 

 

 

 

200%Modulus(MPa)

 

 

 

 

 

 

 

 

 

 

300%Modulus(MPa)

9.6

 

11.6

 

 

 

 

 

 

 

Tensile Strength(MPa)

51.5

59.3

38.6

37.3

31

40.1

48.3

46.3

39.7

 

Elongation at Breaking Force(%)

752

751

752

507

400

535

450

652

555

 

Tear Strength(KN/m,Unnotched)

107

115

120

128

104

126

128

115.6

101.5

 

Resilience Rate(%)

32

35

35

32

36

33

32

30

30

 

Abrasion(mm3

20

20

20

21

22

20

20

20

21

 

Compression Permanent Deformation Rate(%)

23

24

25

27

22

20

24

25

26

 

Density(g/cm3

1.20

1.20

1.22

1.25

1.25

1.25

1.25

1.25

1.25

 

Main Features of the System

It has good dynamic property、high polar solvent resistance、low internal heat and excellent heat resistance.

Recommended Application Field

High-speed wheels、textile friction disks、high load-bearing wheels、high-speed railway track laying wheels、and shovel truck wheels.

Media Inquiry
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