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ASTM D4889-04

(Test Method)

Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates

Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates

SCOPE
1.1 These test methods (A and B) determine the viscosity of crude or modified isocyanates. They are applicable to products derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenyl isocyanates (see Note 0).Note 0
Test method A includes a procedure for measuring dynamic viscosity using a rotational Brookfield instrument. Test method B is simply a reference to a general procedure for measuring kinematic viscosity using a Cannon-Fenske instrument, D 445.
1.2 The values stated in SI units are to be regarded as standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazards statements see Warnings at the end of and .Note 2
There is no equivalent ISO standard.

General Information

Status
Historical
Publication Date
31-Mar-2004
Technical Committee
D20 - Plastics
Drafting Committee
D20.22 - Cellular Materials - Plastics and Elastomers
Current Stage
Ref Project

Relations

Replaces
ASTM D4889-98 - Standard Test Methods for Polyurethane Raw Materials Determination of Viscosity of Crude or Modified Isocyanates
Effective Date
01-Apr-2004
Replaced By
ASTM D4889-04(2011) - Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates
Effective Date
01-Feb-2011

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ASTM D4889-04 - Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified IsocyanatesASTM D4889-04 - Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates
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ASTM D4889-04 - Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4889 – 04
Standard Test Methods for
Polyurethane Raw Materials: Determination of Viscosity of
1
Crude or Modified Isocyanates
This standard is issued under the fixed designation D4889; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Significance and Use
1.1 These test methods (Aand B) determine the viscosity of 4.1 These test methods can be used for research or for
crude or modified isocyanates. They are applicable to products qualitycontroltocharacterizeisocyanatesusedinpolyurethane
derived from toluene diisocyanate, methylene-bis-(4- products.
phenylisocyanate), and polymethylene polyphenylisocyanates 4.2 Viscosity measures the resistance of a fluid to uniform
(see Note 1). continuous flow without turbulence or other forces.
4.3 Some isocyanates exhibit non-Newtonian behavior un-
NOTE 1—Test method A includes a procedure for measuring dynamic
der certain conditions. Whenever possible, generate results for
viscosity using a rotational Brookfield instrument. Test method B is
comparison under the same conditions, that is, the same
simply a reference to a general procedure for measuring kinematic
spindle/speed combination for Brookfield viscosity and the
viscosity using a Cannon-Fenske instrument, D445.
same tube size for Cannon-Fenske viscosity.
1.2 The values stated in SI units are to be regarded as
standard.
5. Sampling
1.3 This standard does not purport to address all of the
5.1 Since organic isocyanates react with atmospheric mois-
safety concerns, if any, associated with its use. It is the
ture, special precautions must be taken in sampling (see
responsibility of the user of this standard to establish appro-
Warningattheendofthisparagraph).Usualsamplingmethods
priate safety and health practices and determine the applica-
(for example, sampling an open drum with a thief), even when
bility of regulatory limitations prior to use.Forspecifichazards
carriedoutrapidly,cancausecontaminationofthesamplewith
statements see Warnings at the end of 5.1 and 10.5.
insoluble urea. Therefore, the sample must be blanketed with
NOTE 2—There is no equivalent ISO standard.
dry air or nitrogen at all times. Warning—Organic iso cyan-
ates are harmful when they are absorbed through the skin, or
2. Referenced Documents
whenthevaporsarebreathed.Provideadequateventilationand
2
2.1 ASTM Standards:
protective gloves and wear eyeglasses.
D445 Test Method for Kinematic Viscosity of Transparent
6. Test Conditions
and Opaque Liquids (and Calculation of Dynamic Viscos-
ity)
6.1 Since isocyanates react with moisture, keep laboratory
D883 Terminology Relating to Plastics
humidity low, preferably about 50 % relative humidity.
E1 Specification for ASTM Liquid-in-Glass Thermometers
TEST METHOD A—BROOKFIELD VISCOSITY
3. Terminology
7. Summary of Test Method
3.1 For definitions of terms used in these test methods see
7.1 The viscosity is measured at 25 6 0.3°C with a Brook-
Terminology D883.
3
field viscometer, either Model LVF, LVT, RVF, or RVT.
1
These test methods are under the jurisdiction of ASTM Committee D20 on
8. Interferences
Plastics and are the direct responsibility of Subcommittee D20.22 on Cellular
Materials—Plastics and Elastomers. 8.1 Thetemperatureandcontainersizeareimportantfactors
Current edition approved April 1, 2004. Published April 2004. Originally
in measuring Brookfield viscosity accurately. Deviation from
approved in 1988. Last previous edition approved in 1998 as D4889 - 98. DOI:
the prescribed conditions will affect the accuracy of the results.
10.1520/D4889-04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from Brookfield Engineering Laboratories, 240 Cushing St., Stough-
the ASTM website. ton, MA 02072.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D4889 – 04
TABLE 1 Guide to Selecting the Rotational Speed Using the Number 1 Spindle
Viscosity range of sample LVF LVT RVF RVT
in mPa s (cP) Rotational speed (rpm) Rotational speed (rpm) Rotational speed (rpm) Rotational speed (rpm)
10-80 60 60 20 100
80-160 30 30 20 50
160-400 12 12 20 20
9. Apparatus 10 revolutions. Depress the clutch lever, stop the motor, and
3
readthescale.Ifthepointerisnotinvieworifitisbelow10 %
9.1 Brookfield Synchro-lectric Viscometers, Mo
...

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