ASTM D5155-19 Determination of the Isocyanate Content of Aromatic Isocyanates

ASTM D5155-19 Determination of the Isocyanate Content of Aromatic Isocyanates

The ASTM D5155-19 method is specific to measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials. The isocyanate sample is reacted with a large amount of dibutyl amine to make the corresponding urea. The values stated in SI units are to be regarded as standard.

    Scope:

    ASTM D5155-19 is crucial for research or quality control to characterize isocyanates used in polyurethane products. All three test methods are essential for determining crude or modified isocyanate content of suitable reactivity and solubility.

    Test Procedure 

    In all three test methods given in ASTM D5155-19, the isocyanate sample is reacted with an excess amount of dibutyl amine to form the corresponding urea. The NCO content is determined from the amount of dibutyl amine consumed in the reaction. The test methods differ in the reaction conditions, solvents used, or both.

    Test MethodsSection
    Test Method A (Unheated toluene-dibutyl amine)Section 10-14
    Test Method B (Heated toluene-dibutyl amine)Section 15-19
    Test Method C (Unheated trichloro benzene toluene-dibutyl amine)Section 20-25

    Specimen Size

    Laboratory humidity of the samples to be tested by ASTM D5155-19 must be kept low, preferably below 50 % relative humidity.

    Results

    The ASTM D5155-19 test result is the average of duplicates, expressed as percent NCO, to the nearest 0.01 %.

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing
        •  

          STEP 01

          You share material and testing requirements with us

        •  

          STEP 02

          We ensure your sample pick-up in an ensured manner

        •  

          STEP 03

          We deliver test report to your inbox

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process

            ddd

            Let us combine our capabilities to achieve success!!

              idea icon
              Want to connect with an expert before you leave?