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Products >> Adiprene & Vibrathane
Castable Polyurethanes

Chemtura Corporation of USA (formerly known as Uniroyal) manufacture the Adiprene and Vibrathane range of castable polyurethanes. Adiprene/Vibrathane are the world's leading high-performance, hot-cast urethane pre-polymers. These resins form unusually tough thermoset elastomers when mixed with an appropriate curative.

These materials provide both the resilience of rubber and the toughness of engineering plastics, making them the ideal choice for some of the most demanding applications in the world. Their superior toughness, abrasion resistance, greater load-bearing capacity, cut resistance, heat build-up resistance, and versatility make them popular replacements for steel, plastic, and other rubber materials.

Adiprene/Vibrathane can be cast manually, using simple equipment like hot air oven and vacuum degassing chamber, needing very low level of investment. The manufacturing process involves heating the pre-polymer and curative, mixing them in a specified ratio, degassing the mixture and pouring it into the mould for curing. Few hours of postcure is recommended after demoulding. Automated machines for mixing and dispensing can also be used if large volumes are required to be processed, or for making typical and complicated parts.

The Adiprene/Vibrathane range consists of more than 300 grades, which are renowned for their performance in demanding applications such as:

  • Mining applications, where they are more abrasion resistant than steel.
  • Rollers for steel, paper, textile, printing and other industrial applications.
  • Oil & gas machinery and equipment.
  • Solid industrial tires and wheels, where they carry more load at higher speed and provide lower rolling resistance than other elastomers.
  • Mould punches for the ceramic tiles manufacturing industry.
  • Electronic devices and processing equipment
  • Golf balls, where they withstand cutting by the club and provide superior distance travel.
  • Countless other applications that require outstanding toughness.

Adiprene/Vibrathane MDI and TDI prepolymers:
Adiprene/Vibrathane MDI and TDI prepolymers can be used to produce elastomers of outstanding toughness, abrasion resistance, load-bearing capacity, cut resistance, and heat buildup resistance.

High-performance TDI prepolymers come in both ether and ester types, with hardnesses ranging from 70 Shore A to 75 Shore D, and special formulations available to reach hardnesses outside of this range. High-performance MDI prepolymers are available in ether and ester types, with hardnesses ranging from 60 Shore A to 55 Shore D, and special formulations available to reach hardnesses outside of this range.

Adiprene Low-Free TDI Systems for easy processing and excellent dynamics:
Chemtura's Adiprene LF (low-free) TDI products take TDI technology to the next level of performance and safety. Reducing free TDI levels to a maximum of 0.1%, they greatly improve workplace safety and allow production of polyurethane systems with lower viscosity, longer pour life, faster demolding, and lower hysteretic heat buildup than with conventional technology.

Adiprene K Single component systems:
This new and unique product range from Chemtura is based on their proprietary Caytur blocked curative technology, having numerous advantages over two-component systems. The pre-polymer and curative are already mixed in the required ratio, and the curative is activated only upon heating of the material. This eliminates the problems of short pot life, offering much greater flexibility in processing for a wide variety of parts

Adiprene Duracast  easy to process two component system:
This latest range from Chemtura is a two component system that offers easier processing and handling. Their longer pot life and quick demold time reduces waste and increase productivity, providing 'total cost improvement' to processors.

Adiprene PPDI systems for high-temperature performance and fatigue resistance:
Adiprene PPDI (para-phenylene diisocyanate) Systems have the lowest heat buildup from hysteresis, outstanding fatigue resistance, and the best retention of properties at high temperatures ever seen in a commercial polyurethane elastomer. PPDI has far better properties than established high-temperature elastomer like HNBR at temperatures as high as 150°C.

Adiprene Ribbon Flow Systems for fast, moldless roll covering:
Adiprene Ribbon Flow Systems are short pour life systems used with a meter mix machine and a lathe to coat to the core of a roll, without the need for a mold. Material cures on the rotating core as it is applied, and the mix head of the meter mix machine slowly traverses the length of the core until the coating is complete. Ribbon Flow systems are available in both ether and ester types, and in hardnesses from 60 Shore A to 67 Shore D.

Vibracure and Caytur Curatives:
Curing Adiprene/Vibrathane prepolymers is easy with our wide range of curatives, including:

  • MOCA, Ethacure 300, Butanediol, and HQEE standard curatives for curing Adiprene/Vibrathane into tough, thermoset elastomers.
  • Vibracure A157 a specialty amine curative that can be used to make FDA dry food approved elastomers with TDI prepolymers.
  • Caytur 21 and 31 curatives are blocked curatives designed to give latency at room temperature and extremely fast cure when heat activated. They are ideal for producing thin parts such as polyurethane belts.

Physical properties of some popular TDI Ether and Ester Pre-Polymer Grade

Pre-Polymer Grade

Adiprene
L-100

Adiprene
L-167

Adiprene
LF-950

Vibrathane
V-8083

Vibrathane
V-8090

Adiprene
LF-1900

Adiprene
LF-1950

Adiprene
K-TE92

Type

Ether

Ether

Ether - LF

Ester

Ester

Ester -LF

Ester - LF

Ether - LF

Physical Properties

 

 

 

 

 

 

 

 

Hardness, durometer

90 A

95 A

95A

85A

90A

90A

95A

92 A

100% Modulus, psi (Mpa)

1100 (7.6)

1800 (12.4)

2200 (15.2)

730 (5.03)

1100 (7.6)

1200(8.3)

2100(14.5)

1140(7.9)

300% Modulus, psi (Mpa)

2100 (14.5)

3400 (23.4)

4100 (28.3)

1266 (8.72)

2050 (14.1)

2200(15.2)

4100(28)

1920(13.2)

Tensile strength, psi (Mpa)

4500 (31.0)

5000 (34.5)

5500 (37.9)

6197 (42.7)

7200 (49.4)

7200(50)

7300(50)

5190 (35.8)

Elongation at break, %

450

400

350

660

510

525

460

480

Tear Strength, ASTM D-470, lb/in (kN/m)

75 (13.1)

150 (26.2)

125 (21.9)

116 (20.3)

140 (24.5)

135(24)

180(32)

95(16.6)

Tear Strength, Die C, lb/in (kN/m)

400 (70)

500 (87.5)

500 (87.5)

497 (87.0)

610 (107)

600(105)

770(135)

440(77.1)

Compression Strength (22 hrs @ 70ºC.), %

27

40

32

25

30

32

33

40

Rebound Resilience, %

45

40

42

32

27

27

27

50

Specific gravity at 24ºC.

1.1

1.14

1.13

1.25

1.25

1.27

1.29

1.05

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