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Ref. No.: IS0 / R 308 - 1963 (E)
IS0
I NT ERN AT I ON AL O RG A N IZAT I O N FOR STA ND AR D I2 AT I ON
IS0 RECOMMENDATION
R 308
PLASTICS
DETERMINATION OF THE ACETONE SOLUBLE MATTER
(RESIN CONTENT OF MATERIAL IN THE UNMOULDED STATE)
OF PHENOLIC MOULDING MATERIALS
1st EDITION
May 1963
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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 308, Determination of the Acetone Soluble Matter (Resin
Content of Material in the Unmoulded State) of Phenolic Moulding Materials, was drawn up
by Technical Committee ISO/TC 61, Plastics, the Secretariat of which is held by the
American Standards Association Inc. (ASA).
Work on this question by the Technical Committee began in 1956 and led, in 1959,
to the adoption of a Draft IS0 Recommendation.
In October 1960, this Draft IS0 Recommendation (No. 382) was circulated to all the
IS0 Member Bodies for enquiry. It was approved, subject to a few modifications of an
editorial nature, by the following Member Bodies :
Australia India Spain
Sweden
Austria Israel
Belgium Italy Switzerland
Chile Japan Turkey
Czechosloveia Nethei-mds United Kingdom
France New Zealand U.S.A.
Poland U.S.S.R.
Germany
Hungary Romania
One Member Body opposed the approval of the Draft:
Argentina.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in May 1963, to accept it as an IS0 RECOMMENDATION.
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I
IS0 / R 308 - 1963 (E)
IS0 Recommendation R 308 May 1963
PLASTICS
DETERMINATION OF THE ACETONE SOLUBLE MATTER
(RESIN CONTENT OF MATERIAL IN THE UNMOULDED STATE)
OF PHENOLIC MOULDING MATERIALS
1. SCOPE
This method of test is designed to determine the percentage of matter that can be extracted by
acetone, at a temperature near its boiling point, from phenolic moulding materials. The method
applies only to moulding materials based upon novolac resins and not to those based upon
resols, as this type of resin may not be completely soluble in acetone.
In this method, the percentage of acetone soluble matter is reported as the resin content, but it
should be noted that, while the extract consists mainly of phenolic resin and hexamine, other
acetone soluble components such as lubricants and colorants or natural resins from the filler
are normally also present and will therefore be reported as resin.
2. APPARATUS
(a) Means for reducing coarse materials to a finer state of division.
(b) Weighing bottle, glass stoppered.
(c) Balance to weigh to 0.001 g.
(d) Extraction apparatus of the type shown in the figure, page 4. (A glass filter crucible may be
used instead of a single-thickness extraction thimble.)
Any other extraction
...