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Introduction 3M™GlassBubblesareengineeredhollowglassmicrospheres

thatarealternativestoconventionalfillersandadditivessuchas

silicas,calciumcarbonate,talc,clay,etc.,formanydemanding

applications.Theselow-densityparticlesareusedinawiderange

ofindustriestoreducepartweight,lowercostsandenhance

productproperties.

Theuniquesphericalshapeof3Mglassbubblesoffersanumber

ofimportantbenefits,including:higherfillerloading,lower

viscosity/improvedflowandreducedshrinkageandwarpage.It

alsohelpsthe3Mglassbubblesblendreadilyintocompounds

andmakesthemadaptabletoavarietyofproductionprocesses

includingspraying,castingandmolding.

Thechemicallystablesoda-lime-borosilicateglasscomposition

of3Mglassbubblesprovidesexcellentwaterresistancetocreate

morestableemulsions.Theyarealsonon-combustibleandnon-

porous,sotheydonotabsorbresin.And,theirlowalkalinitygives

3Mglassbubblescompatibilitywithmostresins,stableviscosity

andlongshelflife.

3M Glass Bubbles K Series and S Seriesarespecially

formulatedforahighstrength-to-weightratio.Thisallowsgreater

survivabilityundermanydemandingprocessingconditions,such

asinjectionmolding.Theyalsoproducestablevoids,whichresults

inlowthermalconductivityandalowdielectricconstant.3M

glassbubblesareavailableinavarietyofsizesandgradestohelp

youmeetyourproductandprocessingrequirements.

3M™ Glass Bubbles K Series S Series

Product Information

Product Test Pressure (psi)

Target Fractional Survival

Minimum Fractional Survival

K Se

ries

K1 250 90% 80%K15 300 90% 80%K20 500 90% 80%K25 750 90% 80%K37 3,000 90% 80%K46 6,000 90% 80%

S Se

ries

S15 300 90% 80%

S22 400 90% 80%S32 2,000 90% 80%S35 3,000 90% 80%S38 4,000 90% 80%S38HS 5,500 90% 80%S60 10,000 90% 80%S60HS 18,000 90% 90%iM30K 28,000 90% 90%

Isostatic Crush Strength

True Density (g/cc)

Product Typical Minimum Maximum

K Se

ries

K1 0.125 0.10 0.14K15 0.15 0.13 0.17K20 0.20 0.18 0.22K25 0.25 0.23 0.27K37 0.37 0.34 0.40K46 0.46 0.43 0.49

S Se

ries

S15 0.15 0.13 0.17S22 0.22 0.19 0.25S32 0.32 0.29 0.35S35 0.35 0.32 0.38S38 0.38 0.35 0.41S38HS 0.38 0.35 0.41S60 0.60 0.57 0.63S60HS 0.60 0.57 0.63iM30K 0.60 0.57 0.63

True Density

Typical Properties Notforspecificationpurposes

3M™ Glass Bubbles

Typical Properties Chemical Resistance Ingeneral,thechemicalpropertiesof3M™GlassBubbles

resemblethoseofasoda-lime-borosilicateglass.

Thermal Conductivity

Product Calculated Thermal Conductivity (W·m-1·K-1) at 70°F (21°C)

K Se

ries

K1 0.047K15 0.055K20 0.070K25 0.085K37 0.124K46 0.153

S Se

ries

S15 0.055S22 0.076S32 0.108S35 0.117S38 0.127S38HS 0.127S60 0.200S60HS 0.200iM30K 0.200

Conductivityincreaseswithtemperatureandproductdensity.The

thermalconductivityofacompositewilldependonthematrix

materialandvolumeloadingof3Mglassbubbles.

Thermal StabilityAppreciablechangesinbubblepropertiesmayoccurabove1112°F

(600°C)dependingontemperatureanddurationofexposure.

Flotation

Floaters (% by bulk volume)

Product Typical Minimum

K Se

ries

K1 96% 90%K15 96% 90%K20 96% 90%K25 96% 90%K37 94% 90%K46 92% 90%

S Se

ries

S15 96% 90%S22 96% 90%S32 94% 90%S35 96% 90%S38 94% 90%S38HS 96% 90%S60 92% 90%S60HS 92% 90%iM30K 92% 90%

Packing Factor (Ratio of bulk density to true particle density)Averagesabout60%.

Oil Absorption0.2-0.6goil/ccof3M™GlassBubbles,perASTMD281-84.

Volatile Content Maximumof0.5percentbyweight.

Alkalinity Maximumof0.5milliequivalentspergram

pHBecause3Mglassbubblesareadrypowder,pHisnotdefined.The

pHeffectwillbedeterminedbythealkalinityasindicatedabove.

When3Mglassbubblesaremixedwithdeionizedwaterat5

percentvolumeloading,theresultingpHoftheslurryistypically

9.1to9.9,asmeasuredbyapHmeter.

Dielectric Constant K Series:1.2to1.7@100MHz,basedontheoreticalcalculations.

S Series:1.2to2.0@100MHz,basedontheoreticalcalculations.

Thedielectricconstantofacompositewilldependonthematrix

materialandvolumeloadingof3Mglassbubbles.

Particle Size

Particle Size (microns, by volume) 3M QCM 193.0

Product DistributionEffective Top Size10th% 50th% 90th%

K Se

ries

K1 30 65 115 120K15 30 60 105 115K20 30 60 90 105K25 25 55 90 105K37 20 45 80 85K46 15 40 70 80

S Se

ries

S15 25 55 90 95

S22 20 35 65 75S32 20 40 70 80S35 20 40 65 80S38 15 40 75 85S38HS 19 44 70 85S60 15 30 55 65S60HS 12 29 48 60iM30K 8.6 15.3 23.6 26.7

Minimumstorageconditionsshouldbeunopenedcartonsinan

unheatedwarehouse.

Underhighhumidityconditionswithanambienttemperature

cyclingoverawiderange,moisturecanbedrawnintothebag

asthetemperaturedropsandtheaircontracts.Theresultmay

bemoisturecondensationwithinthebag.Extendedexposureto

theseconditionsmayresultin“caking”ofthe3Mglassbubbles

tovariousdegrees.Tominimizethepotentialfor“caking”and

prolongthestoragelife,thefollowingsuggestionsaremade:

1.Carefullyre-tieopenbagsafteruse.

2.Ifthepolyethylenebagispuncturedduringshippingorhandling,usethisbagassoonaspossible,patchthehole,orinsertthecontentsintoanundamagedbag.

3.Duringhumidsummermonths,storeinthedriest,coolestspaceavailable.

4.Ifgoodstorageconditionsareunavailable,carryaminimuminventory,andprocessonafirstin/firstoutbasis.

Dustingproblemsthatmayoccurwhilehandlingandprocessing

canbeminimizedbythefollowingprocedures:

1.Foreyeprotectionwearchemicalsafetygoggles.ForrespiratorysystemprotectionwearanappropriateNIOSH/MSHAapprovedrespirator.(Foradditionalinformationaboutpersonalprotectiveequipment,refertoMaterialSafetyDataSheet.)

2.Useappropriateventilationintheworkarea.

3.Pneumaticconveyorsystemshavebeenusedsuccessfully

totransport3Mglassbubbleswithoutdustingfrom

shippingcontainerstobatchmixingequipment.Static

eliminatorsshouldbeusedtohelppreventstaticcharges.

Diaphragmpumpshavebeenusedtosuccessfullyconvey

3Mglassbubbles.Vendorsshouldbeconsultedfor

specificrecommendations.

3Mglassbubblebreakagemayoccuriftheproductisimproperly

processed.Tominimizebreakage,avoidhighshearprocessessuch

ashighspeedCowlesDissolvers,pointcontactshearsuchasgear

pumpsor3-rollmills,andprocessingpressuresabovethestrength

testpressureforeachproduct.

Health and Safety InformationForproductHealthandSafetyInformation,refertoproductlabel

andMaterialSafetyDataSheet(MSDS)beforeusingproduct.

Particle Size (continued)Hard Particles (3M QCM 93.4.3)

Nohardparticles(e.g.glassslag,flowagent,etc.)greaterthan

U.S.number40(420microns)standardsievewillexist.

Oversize Particles (3M QCM 93.4.4)

ForK1, K15, K20andK25glassbubbles:

Usinga10gramsampleonaU.S.number80standardsieve

(177microns),amaximumoffive(5)percentbyweightglass

bubbleswillberetainedonthesieve.

ForK37 andK46glassbubbles:

Usinga10gramsampleonU.S.number100standardsieve

(149microns),amaximumofone(1)percentbyweightglass

bubbleswillberetainedonthesieve.

ForS15, S32, S35, S38, S38HS, S60, S60HSandiM30Kglass

bubbles:

Usinga10gramsampleonaU.S.number140standardsieve

(105microns),amaximumofthree(3)percentbyweightglass

bubbleswillberetainedonthesieve.

ForS22glassbubbles:

Usinga10gramsampleonaU.S.number200standardsieve

(74microns),amaximumoffive(5)percentbyweightglass

bubbleswillberetainedonthesieve.

Appearance (3M QCM 22.85)Whitetotheunaidedeye.

Flow (3M QCM 22.83)3M™GlassBubblesremainfreeflowingforatleastoneyearfrom

thedateofshipmentifstoredintheoriginal,unopenedcontainer

intheminimumstorageconditionsofanunheatedwarehouse.

Labeling3Mglassbubbleswillbepackagedinsuitablecontainerstohelp

preventdamageduringnormalhandlingandshipping.Each

containerwillbelabeledwith:

1.Nameofmanufacturer

2.Typeof3Mglassbubbles

3.Lotnumber

4.Quantityinpounds

Storage and Handling Tohelpensureeaseofstorageandhandlingwhilemaintaining

freeflowingproperties,3M™GlassBubbleshavebeenmade

fromachemicallystableglassandarepackagedinaheavy-duty

polyethylenebagwithinacardboardcontainer.

Energy and Advanced Materials Division 3M Center, Building 223-6S-04St. Paul, MN 55144-1000www.3M.com/microspheres

3M is a trademark of 3M. Used under license by 3M subsidiaries and affiliates.

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Please recycle. Printed in USA.Issued: 9/07 © 3M 2007. All rights reserved. 5749HB 98-0212-3859-1

Important Notice to Purchaser: The information in this publication is based on tests that we believe are reliable. Your results may vary due to differences in test types and conditions. You must evaluate and determine whether the product is suitable for your intended application. Since conditions of product use are outside of our control and vary widely, the following is made in lieu of all express and implied warranties (including the implied warranties of merchantability and fitness for a particular purpose): Except where prohibited by law, 3M’s only obligation and your only remedy, is replacement or, at 3M’s option, refund of the original purchase price of product that is shown to have been defective when you received it. In no case will 3M be liable for any direct, indirect, special, incidental, or consequential damages (including, without limitation, lost profits, goodwill, and business opportunity) based on breach of warranty, condition or contract, negligence, strict tort, or any other legal or equitable theory.

United States 3M Energy and Advanced Materials Division 800 541 6752

Brazil 3M do Brasil Ltda. 5519 3838 7000

Canada 3M Canada Company 800 364 3577

Europe 3M Belgium N.V. 32 3 250 7521

India 3M India Limited Bangalore 9080 2231414

China 3M China Ltd. 86 21 6275 3535

China 3M Hong Kong Limited 852 2806 6111

Taiwan 3M Taiwan Limited 886 2 2704 9011

Korea 3M Korea Limited 82 2 3771 4114

Japan Sumitomo 3M Limited 813 3709 8250

Philippines 3M Philippines, Inc. 63 2 813 3781

Singapore 3M Singapore Pte. Ltd. 65 454 8611

Malaysia 3M Malaysia Sdn. Berhad 60 3 706 2888

New Zealand 3M New Zealand Ltd. 64-9-444-4760

Australia 3M Australia Pty., Ltd. 61 2 9498 9333

Other Areas 651 736 7123 (U.S.)

Packaging Information Small Box (10 Cubic ft.) Asinglecorrugatedboxwithaplasticliner.Allboxesare bandedtogetherandtothewoodenpallet.4boxesperpallet.

Eachboxinsidediameteris22in.×19in.×39in. Palletsizeis42in.×48in.

Large Box (50 Cubic ft.)* Asinglecorrugatedboxwithaplasticliner.Topenclosed withinterlockingdoublecoverbanded.Bottomisnormalbox closure,entireboxbandedtowoodenpallet.

Eachboxinsidediameteris48in.×42in.×44in.Overall loadsizeis483/4in.×423/4in.×50in.includingpallet. Palletsizeis42in.×48in. *S60 and S60HS large boxes are 38 cubic ft.

Product Small Box

Large Box*

Truckload Large Box* 44 Pallets

K Se

ries

K1 40 lb. 210 lb. 9,240 lb.K15 50 lb. 265 lb. 11,660 lb.K20 60 lb. 350 lb. 15,400 lb.K25 80 lb. 430 lb. 18,920 lb.K37 100 lb. 660 lb. 29,040 lb.K46 125 lb. 815 lb. 35,860 lb.

S Se

ries

S15 50 lb. 265 lb. 11,660 lb.S22 60 lb. 385 lb. 16,940 lb.S32 100 lb. 525 lb. 23,100 lb.S35 100 lb. 630 lb. 27,720 lb.S38 100 lb. 680 lb. 29,920 lb.S38HS 100 lb. 680 lb. 29,920 lb.S60 125 lb. 850 lb. 37,400 lb.S60HS 125 lb. 850 lb. 37,400 lb.iM30K 125 lb. 850 lb. 37,400 lb.

Box Weights

*Box weights may vary due to manufacturing tolerances on each product.

3M™ Glass Bubbles

Resources 3M™GlassBubblesaresupportedbyglobalsales,technicaland

customerserviceresources,withfully-staffedtechnicalservice

laboratoriesintheU.S.,Europe,Japan,LatinAmericaand

SoutheastAsia.Usersbenefitfrom3M’sbroadtechnologybase

andcontinuingattentiontoproductdevelopment,performance,

safetyandenvironmentalissues.

Foradditionaltechnicalinformationon3Mglassbubblesinthe

UnitedStates,call3MPerformanceMaterialsDivision,

800 367 8905.

Forother3Mglobaloffices,andinformationonadditional3M

products,visitourwebsiteat:www.3M.com/microspheres.