ASTM_D_3716_-_14.pdf

Designation:D371614Standard Test Methods forUse of Emulsion Polymers in Floor Polishes1This standard is issued under the fixed designation D3716;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 These test methods cover test procedures for emulsionpolymers that are used in water-based floor polishes.The term“emulsion polymers”is used primarily to denote those mate-rials produced by regular emulsion polymerization techniques,but may be extended to those polymers that are subsequentlyemulsified or dispersed after polymerization.Unless otherwisenoted,the tests may be used for any polymer or copolymersystems.The methods appear in the following order:SectionSampling4Total Solids5pH Value6Apparent Viscosity7Sediment8Storage Stability9Freeze-thaw Stability10Specific Gravity111.2 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 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E1 Specification for ASTM Liquid-in-Glass ThermometersE70 Test Method for pH of Aqueous Solutions With theGlass ElectrodeE100 Specification for ASTM Hydrometers3.Significance and Use3.1 The purpose of this test is not to fully identify andcharacterize a polymer,but to identify a variety of basicparameters needed to predetermine the usefulness of thepolymer in formulations as well as for Quality Control pur-poses.3.2 Astatement of precision and accuracy is not appropriatein this case.4.Sampling4.1 Outline of Test MethodSince stratification may occurin emulsion polymers,they must be thoroughly agitated toobtain a homogeneous blend as a representative sample.Theprocedure required differs with the type of container andfacilities available.4.2 Sampling from Tank CarsTake three samples of atleast 1 pt(473 mL)each,one at the center of the tank,anotherhalf way between the center and the bottom,and the third halfway between the center and the top.Take the top sample first,then the center sample,and the bottom sample last.Use aweighted sampler with a remotely operated,removable top,orother suitable sampling device that will accomplish the sameresults.Determine the applicable specified or characteristicproperties of the samples by the standard procedures ormethods.If there is any evidence that stratification hasoccurred,then thoroughly agitate the contents of the car untilsamples obtained agree within 1%of total solids.4.3 Sampling from Drums:4.3.1 Blending of ContentsBlend the emulsion polymerby one of the following methods:4.3.1.1 Method AIf the drum is fitted with a bung andcontains 2%air space,lay it on its side and roll to and frobriskly for not less than 10 min.Then turn the drum upsidedown for about 15 min and repeat the rolling operation for anadditional 10 min.If the drum contains less than 2%air space,transfer the contents to a larger vessel and thoroughly stir,preferably by means of a perforated steel disk plunger.Stirringfor about 10 min will normally suffice.4.3.1.2 Method BAgitate the contents of the drum bymeans of a suitable motor-driven stirrer for as long as isnecessary to obtain uniformity.Excessive stirring and unnec-essary exposure of the emulsion polymer to air must beavoided.A suitable type of stirrer consists of a collapsibletwo-bladed stainless steel propeller of 110-mm minimumdiameter,when fully opened,mounted on a stainless steel shaftsufficiently long for the propeller to be distant about one1These test methods are under the jurisdiction of ASTM Committee D21 onPolishes and are the direct responsibility of Subcommittee D21.03 on Chemical andPhysical Testing.Current edition approved Sept.1,2014.Published October 2014.Originallyapproved in 1978.Last previous edition approved in 2008 as D3716 99(2008).DOI:10.1520/D3716-14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 quarter the height of the emulsion polymer from the bottom ofthe drum.Operate stirrer at a minimum speed of 900 r/min.Ifdesired,two propellers may be used on the same shaft,thelower one being near the end of the shaft.The shaft speed shallgive a brisk turnover without creating a vortex.The part of theequipment immersed in the emulsion polymer must contain nocopper or brass.4.3.2 Removal of SampleAfter blending,take the samplewithout delay.Asuitable method is by slowly inserting a clean,dry,glass tube of not