GB/T 43086-2023Plastics - Polymer dispersions - Determination of sieve residue (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020

"Directives for standardization - Part 1: Rules for the structure and drafting of

standardizing documents".

The modification of this document adopts ISO 4576:1996 "Plastics - Polymer

dispersions - Determination of sieve residue (gross particle and coagulum content)".

Compared with ISO 4567:1996, this document has many structural adjustments. See

Annex A for a comparison list of structure number changes between the two documents.

The technical differences between this document and ISO 4576:1996 and their reasons

are as follows:

- The provision for "particles whose particle size is much larger than the average

particle size of other particles (such as 10 times or 100 times)" has been deleted

(see Chapter 1 of this document) to adapt to the technical conditions of China and

increase operability;

- Water of the same purity (see 5.1 of this document) has been deleted to adapt to the

technical conditions of China;

- Replace ISO 3310-1:1990 (see 6.1 of this document) with normatively cited GB/T

6003.1-2022 to adapt to the technical conditions of China and increase operability;

- The temperature control accuracy of the test chamber has been added (see 6.6 of

this document) to improve the accuracy of test results;

- The capacity of the 500 mL beaker has been added (see 6.8 of this document), and

the 600 mL specification beaker in the original text has been deleted to adapt to

the technical conditions of China;

- General laboratory instruments (see 6.10 of this document) have been added to

facilitate operator use;

- Replace ISO 123:1985 and ISO 842:1984 (see 7.1 of this document) with

normatively cited GB/T 3186-2006. There is no consistent correspondence

between the two documents to adapt to the technical conditions of China and

increase operability;

- Add requirements for coarse filtration of sampling (see 7.2 of this document) to

improve the accuracy of test results;

- Add post-sampling test time (see 7.2 of this document) to improve the accuracy of

test results;

Plastics - Polymer dispersions - Determination of sieve

residue

1 Scope

This document describes a method for the determination of the mass fraction of sieve

residues, i.e., coarse particles and coagulum, in polymer dispersions.

This document applies only to coagulated polymer dispersions.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 3186-2006, Paints, varnishes and raw materials for paints and varnishes -

Sampling

GB/T 6003.1-2022, Test sieves - Technical requirements and testing - Part 1: Test

sieves of metal wire cloth (ISO 3310-1:2016, MOD)

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Method overview

Dilute the polymer dispersion with deionized water. Use metal mesh filtration with

specific mesh size. Wash with deionized water. Dry and weigh its mass.

5 Reagents

9 Calculation and presentation of results

10 Precision

In the same laboratory, the same operator uses the same equipment, according to the

same test method, and the same measured object is tested independently within a short

period of time. The absolute difference between the two independent test results

obtained is not greater than 8% of the arithmetic mean of the two measured values.

11 Test report

The test report shall include at least the following information:

a) Reference to this document;

b) Details of the specimen;

c) Test sieve specifications and models;

d) Test date;

e) Test temperature and other test condition information;

......