Special properties polyurethane prepolymer Solvent resistant

  • Brand:

    sinograce
  • Item NO. :

    SR-551,SR-552,SR-553
  • Payment:

    L/C、D/A、D/P、T/T、MoneyGram、Paypal Other.
  • Product Origin:

    China Anhui
  • Color:

    Waxy solid
  • Shipping Port:

    Shanghai And Other Ports
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Product Detail

Description

Special properties polyurethane prepolymer solvent resistant


Key features

Can be used for organic solvents, such as esters, toluene, printing ink, water-based ink, ketones, etc.


Typical properties 

Solvent resistant

SR-551

SR-552

SR-553

Prepolymer

Appearance (25℃)

Waxy solid

viscous liquid

Waxy solid

NCO Content(%)

5.5~6.5

3.0~3.5

3.0~3.5

Using Mixture Ratio (PHR)

16.0~16.6

7.1~8.3

7.1~8.3

Life in the Reaction Kettle (75~78℃/min)

10~12

3~5

3~5

Physical Properties of Finished Products

Hardness (Shore D)

55±5

75±5

85±5

Tensile Strength (MPa)

16.6

38.2

44.7

Tearing Strength (kN/m)

23.4

67.5

69.8

Elongation at Break (%)

570

710

512

TOL/EA/CYC mixed solvent 24h expansion rate(%)

﹢15

﹢9

﹢10


Application

-Mainly used in the production of a variety of special gaskets, seals, high and low hardness printing roller, screen printing scraper, etc.


Usage method

-Can be used for manual, some products are more suitable for the operation of pouring machine, chain extender for MOCA, E-300, BDO or special chain extender.


Attention

The prepolymer should be stored at a low temperature and dry place, at higher temperatures (more than 75 degrees Celsius) should not be heated for more than 3 hours.

After the opening of the prepolymer should be used up as soon as possible, if not exhausted with nitrogen seal.

The storage period of unopened prepolymer is three months.

If you want to add color paste or other materials, keep the water content below 0.1%, and consider the compatibility of additives.

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      Special properties polyurethane prepolymer Solvent resistant
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