1、Designation:D 3845 05Standard Specification forGlacial Methacrylic Acid1This standard is issued under the fixed designation D 3845;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 parentheses indi
2、cates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers glacial methacrylic acid(98.5%grade)for use in paint,varnish,lacquer,and relatedproducts.1.2 The following applies to all specified limit
3、s in thisstandard;for purposes of determining conformance with thisstandard,an observed value or a calculated value shall berounded off“to the nearest unit”in the last right-hand digitused in expressing the specification limit,in accordance withthe rounding-off method of Practice E 29.1.3 This stand
4、ard 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 regulatory limitations prior to use.1.4 For hazard information and g
5、uidance,see the suppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:2D 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D 1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)D 3125 Test Method for Monomethyl Ether of Hydro-qu
6、inone in Colorless Monomeric Acrylate Esters andAcrylic AcidE 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsD 5386 Test Method for Color of Liquids Using TristimulusColorimetryE 300 Practice for Sampling Industrial ChemicalsE 301Test Method for Tota
7、l Acidity of Organic Acids32.2U.S.Federal Specification:PPP-C-2020 Chemicals,Liquid,Dry,and Paste:Packagingof43.Properties3.1 Glacial methacrylic acid shall conform to the followingrequirements.Assay,from total acidity by titration,weight%,min99.0Water,weight%,max0.30Color,Pt-Co scale,maxA25Inhibito
8、r,methyl ether of hydroquinoneB_AInstrumental Pt-Co color determined by Test Method D 5386 have been shownto have no statistically significant difference from Pt-Co color determined by TestMethod D 1209.However,it is not known whether glacial methacrlyic acid was partof the sample set included in th
9、e interlaboratory study.BAs agreed upon between the purchaser and the manufacturer.4.Sampling4.1 Sample the material in accordance with Practice E 300.Use brown glass sample bottles and protect samples from lightand heat at all times.5.Test Methods5.1 The properties enumerated in this specification
10、shall bedetermined in accordance with the following ASTM methods:5.1.1 Assay,from Total Acidity by TitrationTest MethodE 301.The molecular weight of methacrylic acid is 86.09 andit has one reacting group.5.1.2 WaterTest Method D 1364.5.1.3 ColorTest Method D 1209(see Note A in 3.1).5.1.4 InhibitorTe
11、st Method D 3125.6.Packaging and Package Marking6.1 Package size shall be agreed upon between the pur-chaser and the supplier.6.2 Packaging shall conform to applicable carrier rules andregulations or when specified shall conform to Fed.Spec.PPP-C-2020.7.Keywords7.1 glacial methacrylic acid1This spec
12、ification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved May 15,2005.Published July 2005.Originallyapproved in
13、1979.Last previous edition approved in 2000 as D 3845 96(2000).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 Document Summary page onthe ASTM website.3Wi
14、thdrawn.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098.1*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 St
15、ates.SUMMARY OF CHANGESCommittee D01.35 has identified the location of selected changes to this standard since the last issue(D 3845 96(2000)that may impact the use of this standard.(1)Added reference to Practice E 29 in Scope section.(2)Added Practice E 29 and Test Method D 5386 to list ofReference
16、d Documents.(3)Added new Note A to 3.1.(4)Referenced new Note A in 5.1.3.(5)Changed specification limit for assay from 98.5 to 99.0%min.ASTM International takes no position respecting the validity of any patent rights asserted in connection with 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 revi
