ISO/R 1625:1970

Title missing - Legacy paper document

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1969
• Technical Committee: ISO/TMBG - Technical Management Board - groups
• Drafting Committee: ISO/TMBG - Technical Management Board - groups
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 01-Jan-1975

Standards Content (Sample)

UDC 678.7 : 541.182 : 543.86
Ref. No. : ISO/R 1625-1970 (E)
IS0
INTERN AT1 ON A L O RG A N IZATl ON FOR
STAND AR DI ZATl ON
IS0 RECOMMENDATION
R 1625
PLASTICS
AQUEOUS DISPERSIONS OF POLYMERS AND COPBLYMERS
DETERMINATION OF DRY SOLIDS CONTENT AT 505 "C
1 st ED IT I ON
July 1970
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.

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BRIEF HISTORY
The IS0 Recommendation R 1625, Plastics - Aqueous dispersions of polymers and copolymers - Determination
of dry solids content at IO5 OC, was drawn up by Technical Committee ISO/TC 61, Plastics, the Secretariat of which
is held by the American National Standards Institute (ANSI).
i.-
Work on this question led to the adoption of Draft IS0 Recommendation No. 1625 which was circulated to ail
the IS0 Member Bodies for enquiry in May 1968. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies :
Austria
Israel Sweden
Belgium
Italy Switzerland
Czechoslovakia
Japan Turkey
France
Korea, Rep. of U.A.R.
Germany
Netherlands United Kingdom
Hungary
Poland U.S.A.
India
Portugal U.S.S.R.
Iran
South Africa, Rep. of
No Member Body opposed the approval of the Draft.
This Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council which decided
to accept it as an IS0 RECOMMENDATION.
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-5- ISO/R 1625-1970 (E)
IS0 Recommendation R 1625 July 1970
PLASTICS
AQUEOUS DISPERSIONS OF POLYMERS AND COPOLYMERS
DETERMINATION OF DRY SOLIDS CONTENT AT 105 "C
1. SCOPE
This IS0 Recommendation describes a procedure for the determination of dry solids content of aqueous
dispersions at 1 O5 OC.
The procedure is suitable for all aqueous polymer and copolymer dispersions which are chemically stable at
the test temperature and which do not contain other volatile matter such as organic solvents.
The dry solids content of unplasticized aqueous polymer and copolymer dispersions consists essentially of the
polymer or copolymer and of a small quantity of additives, such as emulsifiers, protective colloids, etc.
For plasticized dispersions, the plasticizer is included in the dry solids content.
Under the conditions of temperature and time adopted in this procedure, the product should not show any
thermal degradation; otherwise different conditions should be used and specified in the test report.
2. PRINCIPLE
Stoving at 105 "C for 1 hour of a sample spread in a thin regular layer, and weighing of the residue obtained.
3. APPARATUS
3.1 Spreading and evaporation apparatus. It is essential to obtain an evenly spread film of about 0.15 mm for
which one of the following devices is suitable :
3.1.1 Apparatus A
The unit illustrated in Figures 1, 2 and 3 consists of two glass plates of diameter about 60 mm, one of
the plates being provided with a support for the other one. The inside circular surfaces must be perfectly
flat and smooth.
3.1.2 Apparatus B
Aluminium foils about 0.1 mm thick, cut into rectangles of about 60 mm X 120 mm.
NOTE. -. The apparatus described in clauses 3.1.1 and 3.1.2 are recommended particularly for very viscous dispersions.
because they are capable of spreading the film automatically.
3.1.3 Apparatus C
Metal or glass dish of 70 mm diameter having a rim with a minimum height of 3 mm.
NOTE. - This apparatus is specially recommended for very fluid dispersions, because it avoids any overflow.

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ISO/R 1625-1970 (E)
3.2 Themzo-regulated oven at 105 2 2 OC, with natural air ventilation.
3.3 Desiccator with a suitable desiccant, for example calcium chloride or silica gel.
3.4 Balance, accurate to 0.0001 g.
4. PROCEDURE
4.1 Using appara
...