1、Designation: D 1725 04Standard Test Method forViscosity of Resin Solutions1This standard is issued under the fixed designation D 1725; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the measurement of the viscos-ity of resin solutions.1.2 The values stated in SI units are to be regarded as thestandard. The val
3、ues given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of re
4、gulatory limitations prior to use. For specific hazardstatements, see Section 7.2. Referenced Documents2.1 ASTM Standards:2D 154 Guide for Testing VarnishesD 1545 Test Method for Viscosity of Transparent Liquidsby Bubble Time MethodD 6440 Terminology Relating to Hydrocarbon ResinsE 691 Practice for
5、Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:OSHA Regulations, 29 CFR, paragraphs 19.10.1000 and1910.120033. Terminology3.1 For definitions related to hydrocarbon resins see Termi-nology D 6440.4. Summary of Test Method4.1 Solid resins are dissolve
6、d in organic solvents by cold-cut or hot-cut methods in the laboratory. The viscosity of suchprepared solutions, or of commercial solutions of resins is thendetermined by the bubble time method (Test Method D 1545).The bubble seconds are approximately equal to stokes.5. Apparatus5.1 Bath, constant-t
7、emperature, consisting of a cylindricalglass jar of about 5-gal capacity, or an aquarium tank withcontrols capable of maintaining the temperature at 25 6 0.1Cwith water as the bath medium.5.2 Bottles, 225-mL (8-oz), wide-mouth, screw cap.5.3 Cellophane, sheet, cut into 102 or 127- mm (4 or 5-in.)squ
8、ares.5.4 Corks, No. 2 short taper, to fit viscosity tubes.5.5 Holder for Viscosity Tubes, preferably a mechanicalholder4with rack and pinion for inverting the tubes. The holdershould be checked with a small level and T-square to makecertain it holds the tubes in an exact vertical position afterbeing
9、 placed in the constant-temperature bath.5.6 Bottle Shaker, preferably one which will give end-over-end agitation.5.7 Timing Device, such as a stopwatch or electric stopclock capable of being read to a precision of 0.1 s.5.8 Viscosity Tubes, of clear glass and flat bottoms, having10.65 6 0.025-mm in
10、side diameter and 114 6 1-mm outsidelength. Plainly legible lines shall be located on the tubes asfollows:27 6 0.5 mm100 6 0.5 mm108 6 0.5 mmAll distances shall be measured from the bottom outside ofthe tube. The distance between the first and second lines shallbe 73 6 0.5 mm.6. Solvent6.1 The solve
11、nt used should be mutually agreed uponbetween the purchaser and the manufacturer. Toluene, xylene,mineral spirits, alcohols, etc., are used for the preparation ofsolutions of resins. For a given resin, the viscosity obtainedwill depend on the solvent used. In case of dispute, bothlaboratories should
12、 use portions of the same batch of solvent.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.33 on Polymers and Resins.Current edition approved Mar. 1, 2004. Published March
13、2004. Originallyapproved in 1960. Last previous edition approved in 1962 as D 1725 62 (1996)e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Documen
14、t Summary page onthe ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.4A suitable mechanical holder is available from the Gardner Laboratory, Inc.,5521 Landy Lane, Washington, DC, Item 660.1Copyright
15、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Hazards7.1 Consult current OSHA regulations, suppliers MaterialSafety Data Sheets, and local regulations for all materials usedin this test method.8. Preparation of Resin Solutions8.1 The proc
16、edure employed for dissolving solid resins willbe dependent upon the chemical nature of the resin under test.Some resins will dissolve readily in cold solvent with moderateagitation, while others must be hot-cut in order to effectsolution. The method of solution shall be agreed upon mutuallybetween
17、the purchaser and the seller since there may bedifferences in solubility or viscosity between solutions pre-pared with and without heat. The solvent concentration mayvary from 30 to 90 % and is generally selected to give asolution having a viscosity between 5 and 300 s. With hardresin use only mater
18、ial taken from freshly broken lumps. Donot use crushed or powdered material from the resin samplecontainer.8.2 Cold-Cut SolutionsBecause it is not easy to tell whensolution of the resin is complete, proceed exactly in accordancewith the following directions, unless experience has shown thatshort cut
19、s can be safely taken:8.2.1 Prepare 100 g of solution as follows: Weigh an225-mL (8-oz), screw-cap bottle, cap, and cellophane sheet tothe nearest 0.05 g. Weigh into the bottle to the nearest 0.05 gthe appropriate amount of solvent (40 g for a 60 % solution).8.2.2 Weigh into a beaker to the nearest
20、0.05 g the correctamount (60 g for a 60 % solution) of the freshly crushed resin,passing a No. 10 (2000-m) sieve.8.2.3 Pour the resin slowly into the bottle containing thesolvent, swirling gently so as to wet the resin as thoroughly aspossible as it is added. Place the cellophane sheet over themouth
21、 of the bottle and screw on the cap tightly.8.2.4 Immediately shake vigorously by hand and place on ashaker to give end-over-end agitation for an overnight period.8.2.5 Check the weight of the bottle and solution to makecertain that none was lost during the mixing. If appreciable losshas occurred, d
22、iscard the solution and prepare a fresh one.8.3 Hot-Cut Solutions:8.3.1 Prepare 100 g of solution as follows: Weigh a 250-mLErlenmeyer flask with a ground joint to the nearest 0.05 g.Weigh into the flask to the nearest 0.05 g the appropriateamount of solvent (40 g for a 60 % solution).8.3.2 Weigh in
23、to the flask to the nearest 0.05 g the correctamount (60 g for a 60 % solution) of the freshly crushed resinpassing a No. 10 (2000-m) sieve. Connect the flask to asuitable air or water condenser and warm gently on a hot platewith swirling as necessary to prevent any charring or scorchingof the resin
24、. Usually, the solution will be complete in 15 or 20min.8.3.3 When the solution is complete, cool the flask, discon-nect, and weigh. If over 0.1 g of solvent has been lost, add thenecessary amount and swirl to mix.8.3.4 If any air bubbles are present, allow the solution tostand until they disappear.
25、8.4 Resins Supplied in SolutionThese resins ordinarilycan be tested for viscosity as received. However, if modifica-tion is necessary, such as a reduction to a specified solidscontent, use a solvent or solvent combination suitable for usewith resin under test, as agreed upon between the manufacturer
26、and the purchaser.9. Procedure9.1 Determine the viscosity of the resin solution in accor-dance with Test Method D 1545, repeating the timing determi-nation until three readings are obtained that agree within 10 sor 3 % relative, whichever is larger.9.2 For viscosities of solutions which have a timed
27、 bubbletravel of 5 s or less, more precise results can be obtained bycomparison against reference standards having predeterminedviscosity (Guide D 154) or timed bubble travel (Test MethodD 1545).10. Report10.1 Report the following information:10.1.1 The mean bubble travel time, in seconds, as thevis
28、cosity at 25C, including:10.1.1.1 Solution concentration,10.1.1.2 Solvent used, and10.1.1.3 Whether cold- or hot-cut solutions were used.11. Precision11.1 Repeatability and ReproducibilityTwo results, eachthe mean of three readings, should be considered suspect ifthey differ by more than 7 % relativ
29、e (95 % confidence level).See Practice E 691.NOTE 1This estimate of precision is based on an interlaboratorystudy.5Because the data showed no significant difference for betweenlaboratory and within laboratory variances, the precision estimates forrepeatability and reproducibility were pooled and a s
30、ingle value reported.12. Keywords12.1 bubble time; resin solutions; viscosity5For the results of the interlaboratory study, see Report of Committee D01,Proceedings, ASTM, Vol 60, 1960.D 1725 042ASTM International takes no position respecting the validity of any patent rights asserted in connection w
31、ith any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible tec
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33、tion at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr H
34、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 1725 043
