1、Designation:D 3845 96(Reapproved 2000)Standard 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
2、 parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers glacial methacrylic acid(98.5%grade)for use in paint,varnish,lacquer,and relatedproducts.1.2 This standard does not purpo
3、rt 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.1.3 For hazard information and guidance,see the su
4、ppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:D 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)2D 1364 Test Method for Water in Volatile Solvents(KarlFischer Reagent Titration Method)2D 3125 Test Method for Monomethyl Ether of Hydro-quinone in Colorles
5、s Monomeric Acrylate Esters andAcrylic Acid2E 300 Practice for Sampling Industrial Chemicals3E 301Test Method for Total 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 followingr
6、equirements.Assay,from total acidity by titration,weight%,min98.5Water,weight%,max0.30Color,Pt-Co scale,max25Inhibitor,methyl ether of hydroquinoneA_AAs agreed upon between the purchaser and the manufacturer.4.Sampling4.1 Sample the material in accordance with Practice E 300.Use brown glass sample b
7、ottles and protect samples from lightand heat at all times.5.Test Methods5.1 The properties enumerated in this specification 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
8、andit has one reacting group.5.1.2 WaterTest Method D 1364.5.1.3 ColorTest Method D 1209.5.1.4 InhibitorTest 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 andregulatio
9、ns or when specified shall conform to Fed.Spec.PPP-C-2020.7.Keywords7.1 glacial methacrylic acidThe American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expr
10、essly advised that determination of the validity of any suchpatent rights,and the risk of infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,
11、either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel t
12、hat your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,at the address shown below.1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibilit
13、y ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved May 10,1996.Published July 1996.Originallypublished as D 3845 79.Last previous edition D 3845 89.2Annual Book of ASTM Standards,Vol 06.04.3Annual Book of ASTM Standards,Vol 15.05.4Available from Stan
14、dardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.This standard is copyrighted byASTM,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the above address or at610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).D 38452
