ASTM D1755-21

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1755 − 15 D1755 − 21
Standard Specification for
Poly(Vinyl Chloride) Resins
This standard is issued under the fixed designation D1755; 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*
1.1 This specification covers the establishment of requirements for homopolymers of vinyl chloride in original powder form
intended for subsequent mixing and processing in thermoplastic compositions. These resins have a nominal specific gravity of 1.4
and a theoretical chlorine content of 56.8 %.
1.2 Two types of resin have been recognized: general purpose (suspension or mass) and dispersion. When mixed with plasticizer,
general-purpose resins yield a dry or moist powder while dispersion resins yield a liquid slurry. Since many resins are polymerized
to meet special requirements, a system of classification has been provided that permits a wide choice of grades.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 This standard does not purport to address all of the safety problems,concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and
determine the applicability of regulatory limitations prior to use.
NOTE 1—This standard and ISO 1264 – 1980 address the same subject matter, but differ in technical content.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D495 Test Method for High-Voltage, Low-Current, Dry Arc Resistance of Solid Electrical Insulation
D883 Terminology Relating to Plastics
D1125 Test Methods for Electrical Conductivity and Resistivity of Water
D1243 Test Method for Dilute Solution Viscosity of Vinyl Chloride Polymers
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1823 Test Method for Apparent Viscosity of Plastisols and Organosols at High Shear Rates by Extrusion Viscometer
D1824 Test Method for Apparent Viscosity of Plastisols and Organosols at Low Shear Rates
D1895 Test Methods for Apparent Density, Bulk Factor, and Pourability of Plastic Materials
D1921 Test Methods for Particle Size (Sieve Analysis) of Plastic Materials
D2132 Test Method for Dust-and-Fog Tracking and Erosion Resistance of Electrical Insulating Materials
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved Oct. 1, 2015May 1, 2021. Published October 2015June 2021. Originally approved in 1960. Last previous edition approved in 20092015 as
D1755 - 09.D1755 - 15. DOI: 10.1520/D1755-15.10.1520/D1755-21.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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
D1755 − 21
D2396 Test Methods for Powder-Mix Time of Poly(Vinyl Chloride) (PVC) Resins Using a Torque Rheometer
D3030 Test Method for Volatile Matter (Including Water) of Vinyl Chloride Resins
D3367 Test Method for Plasticizer Sorption of Poly(Vinyl Chloride) Resins Under Applied Centrifugal Force
D3892 Practice for Packaging/Packing of Plastics
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
3. Terminology
3.1 Definitions—Definitions are in accordance with For definition of terms that appear in this standard specification relating to
plastics, refer to Terminology D883 and . For abbreviations use in this standard specification relating to plastics, refer to
Terminology D1600, unless otherwise indicated.
4. Classification
4.1 Types—This specification covers two types of resin:
4.1.1 Type GP—General-purpose suspension or mass resins.
4.1.2 Type D—Dispersion resins primarily intended for use in organosols and plastisols.
4.2 Grades—This specification provides for as many grades of resin as it is feasible to be selected from the possible combinations
of requirements in Table 1 and Table 2. A grade is designated by first indicating the type (GP or D), followed by cell numbers for
each property in the order in which they are listed in Table 1 and Table 2. Where there is no interest in a property, a “0” is entered
in place of a cell number. If it were desirable, it is acceptable to extend a cell limit by half the cell range into the next higher or
lower cell, but not both. When this is done, it is indicated by a dash above the cell number (n¯) if the extension is into the higher
cell, or a dash below (n) if into the lower cell. Extension of cell limits applies only to cells where ranges of properties are allowed
and not where maximum or minimum values are specified. The cell number of the first property (dilute solution viscosity) is
separated from those that follow by a dash.
4.3 Inherent Viscosity Cell Number—When selecting the inherent viscosity cell number, the number shall cover the full inherent
viscosity production range for the specific product. A resin with an inherent viscosity of 1.07 to 1.11 production range would have
a 5 cell number. A resin with an inherent viscosity of 1.10 to 1.14 production range would have a 6 cell number
5. General Requirements
5.1 The resin shall be in powder form.
TABLE 1 Type GP, General-Purpose Resin Requirements
Desig-
Cell Limits
nation
Property
Order
0 1 2 3 4 5 6 7 8 9
No.
1 Dilute solution unspecfied >0.39 >0.70 >0.75 >0.87 >0.99 >1.09 >1.19 >1.29 >1.38
(inherent) viscosity
2 Sieve analysis, unspecified 0 to 9 10 to 19 20 to 29 30 to 39 40 to 49 50 to 59 60 to 79 80 to 99 100
percent through
No. 200 (75-μm)
sieve
3 Apparent (bulk)
density (min):
g/1000 cm unspecified <144 144 233 329 426 521 617 713 $809
lb/ft unspecified <9.00 9.00 14.51 20.51 26.51 32.51 38.51 44.51 50.51
4 Plasticizer unspecified <9.9 >10.0 >15.0 >20.0 >25.0 >30.0 >35.0 >40.0 .
sorption,
% DOP (min)
5 Dry flow, unspecified . <9.9 >10.0 >12.0 >14.0 >16.0 >18.0 >20.0 .
method ‘A’, s/140
gms
6 Conductivity, unspecified . . <6 $6 . . . . .
max, μS/cm·g
D1755 − 21
TABLE 2 Type D, Dispersion Resin Requirements
Desig-
Cell Limits
nation
Property
Order
0 1 2 3 4 5 6 7 8 9
No.
1 Dilute solution unspecified <0.90 0.90 to 0.99 1.00 to 1.09 1.10 to 1.19 1.20 to 1.29 1.30 to 1.39 1.40 to 1.49 1.50 to 159 $1.60
(inherent)
viscosity
2 Brookfield viscosity unspecified 0 to 24 25 to 49 50 to 74 75 to 99 100 to 124 125 to 149 150 to 174 175 to 199 >199
(RVF), poise
3 Severs viscosity, unspecified 0 to 49 50 to 99 100 to 149 150 to 199 200 to 299 300 to 499 500 to 999 1000 to 1499 >1499
poise
5.2 The resin shall conform to the requirements of Table 1 or Table 2, as specified by the type and grade designation.
NOTE 2—It is possible that properties not covered, such as heat stability, color, and volatile loss, are also important for application performance in
compounds.
6. Sampling
6.1 Adequate statistical sampling before packaging is an acceptable procedure. A batch or lot of material shall be considered as
a unit of manufacture prepared for shipment and is permitted to consist of a blend of two or more production runs of material.
7. Number of Tests
7.1 One set of test specimens shall be considered sufficient for testing each batch.
8. Retest and Rejection
8.1 If any failure occurs, the materials shall be permitted to be retested to establish conformity.
TEST METHODS
9. Dilute Solution Viscosity
9.1 Test Method D1243.
10. Apparent (Bulk) Density
10.1 Test Methods D1895, method A or method B.
NOTE 3—Finely divided powders such as vinyl resins may collect electrostatic charges, which if present at the time of measurement, may result in variable
bulk density values. An anti-static material may be premixed with the sample at concentrations of 0.05 to 0.2 weight percent to reduce this variability
(Magnesium Silicate, Alumina Hydroxide Hydrate, Calcium Stearate, Silicon Dioxide or Carbon Black are examples of anti-static agents).
11. Sieve Analysis
11.1 Test Method D1921.
NOTE 4—Specifications for sieve analysis (Table 1) are primarily intended to control fines.
12. Brookfield Viscosity
12.1 Test Method D1824. Take readings using a Brookfield RVF viscometer at 20 r/min with a No. 6 spindle. Prepare the plastisol
sample as follows:
12.1.1 Plasticizer—Di (2-ethylhexyl) phthalate (DOP).
D1755 − 21
12.1.2 Apparatus:
12.1.2.1 Mixer, planetary-gear type, equipped with flat beater mixing paddle.
12.1.2.2 Vacuum Desiccator, capable of being evacuated to 133 Pa (1 mm Hg).
12.1.3 Procedure:
12.1.3.1 Condition the mixing bowl and materials to 236 1°C.23 6 1°C (73 6 2°F). Weigh 500 6 0.5 g of r
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