ASTM_D_5095_-_91_2013.pdf

Designation:D509591(Reapproved 2013)Standard Test Method forDetermination of the Nonvolatile Content in Silanes,Siloxanes and Silane-Siloxane Blends Used in MasonryWater Repellent Treatments1This standard is issued under the fixed designation D5095;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 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a procedure for the determi-nation of the nonvolatile content(Ns)of silanes,siloxanes,andblended silane-siloxane materials used in masonry water repel-lent treatments and is applicable to both solvent-and water-borne materials.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 health and safety practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see Section 7.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD3980 Practice for Interlaboratory Testing of Paint andRelated Materials(Withdrawn 1998)3E145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Summary of Test Method3.1 A designated quantity of test material is weighed into apreweighed aluminum dish containing the catalyst solution,mixed,allowed to stand for 60 min at room temperature,andthen heated in an oven at 110 6 5C for 60 min.Thenonvolatile content of the test material is calculated bysubtracting the solids of the catalyst solution from the totalsolids by weight of the test solution.4.Significance and Use4.1 This test method is used to determine the nonvolatilecontent of silanes,siloxanes,and silane-siloxane blendedmaterials used in masonry water-repellent treatments.It can beused for the purpose of calculating the volatile organic com-pound(VOC)content of these materials under specified testconditions.5.Apparatus5.1 Aluminum Dishes,58-mm diameter by 18-mm high witha smooth(planar)bottom surface.Precondition the dishes for30 min in an oven at 110 6 5C and store in a desiccator priorto use.5.2 Forced Draft Oven,Type IIAor Type IIB as specified bySpecification E145.5.3 Syringes,1-mL and 5-mL.5.4 Analytical Balance,capable of weighing to 0.1 mg.6.Reagents6.1 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water as definedby Type IV of Specification D1193.6.2 p-Toluenesulfonic Acid,monohydrate.46.3 Alcohol,technical grade ethanol or isopropanol.7.Hazards7.1 In addition to other precautions,provide adequateventilation,consistent with accepted laboratory practice,tolimit the accumulation of solvent vapors.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.47 on Concrete,Stone and Masonry Treatments.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1990.Last previous edition approved in 2007 as D5095 91(2007).DOI:10.1520/D5095-91R13.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4The sole source of supply of the solution of pToluenesulfonic acid known tothe committee at this time is King Industries,Science Road,Norwalk,CT 06852.Ifyou are aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Procedure8.1 Catalyst SolutionPrepare a catalyst solution contain-ing a mixture of 0.5%p-Toluenesulfonic acid in either ethanolor isopropanol.Thoroughly mix the solution.Prepare sufficientcatalyst solution to perform all tests.8.1.1 The nonvolatile content of the test material can becalculated only if the same catalyst solution is used throughoutthe test.Each time a new batch of catalyst solution is used,itsnonvolatile content must be determined.8.2 Determine the nonvolatile matter,in triplicate,of thecatalyst solution as follows:8.2.1 Weigh an aluminum dish to 0.1 mg.Record the weightas W1.8.2.2 Using a 5-mL syringe,weigh 3 6 1.0 g,to 0.1 mg,bydifference,of the catalyst solution into the preweighed alumi-num dish.Record the weight of catalyst solution as W3.8.2.3 Heat the aluminum dish containing the catalys