Materials Water based Latices dispersion Organic Solvents solutions Hot melts Block Copolymers 100% Solids Acrylates Thermal cured Natural rubber UV Cured Moisture cured 202l/1/21 3M Confidential -ESTC Coating
2021/1/21 3M Confidential - ESTC Coating Group 1 Materials: Hot melts Block Copolymers Acrylates Natural Rubber Water based Latices dispersion solutions 100% Solids Thermal Cured UV Cured Moisture Cured Organic Solvents
Comparison of Typical Materials Material Molecular Viscosity Typical Type weight %o solids Solvent Dependent on 5-40% molecular weigh cht and solids Water High L ow only 45-65% dependent on solids Hot melt Medium -High High( solid at 100% room temp) 100% solids Low-typically Low-water like 100 monomers and oligomers 202l/1/21 3M Confidential -ESTC Coating 2
2021/1/21 3M Confidential - ESTC Coating Group 2 Comparison of Typical Materials Material Type Molecular weight Viscosity Typical % solids Solvent High Dependent on molecular weight and % solids 25-40% Water High Low only dependent on % solids 45-65 % Hot melt Medium - High High (solid at room temp) 100% 100 % solids Low – typically monomers and oligomers Low – water like 100 %
Hot melt material Hot melt applications High Volume adhesives BoX Sealing Tape Dia laper lape abrasives 202l/1/21 3M Confidential -ESTC Coating
2021/1/21 3M Confidential - ESTC Coating Group 3 Hot Melt Material Hot Melt Applications – High Volume Adhesives • Box Sealing Tape • Diaper Tape • Abrasives
HM- Block Copolymer PSA's Isoprene backbone Styrene Segment Domains Styrene Isoprene Styrene S-S S-L S-B-S S-EB-S Association of styrene Segments .Provides cohesive Strength(Shear) . Disassociation a 100C allows Flow Rubbery segment Provides tack 202l/1/21 3M Confidential -ESTC Coating
2021/1/21 3M Confidential - ESTC Coating Group 4 Isoprene Backbone Styrene Isoprene Styrene Styrene Segment Domains S-I-S, S-I, S-B-S, S-EB-S Association of Styrene Segments •Provides Cohesive Strength (Shear) •Disassociation @ 100C allows Flow Rubbery Segment Provides Tack HM- Block Copolymer PSA’s
Acrylate PSas Random copolymer of loa and aa or maa Cohesive Strength( Shear) .Entanglements(High MW) Association of Acid groups Reduction of Inter -Molecular motion Extends Rubbery plateau Post Coating Cross-Linking ! 202l/1/21 3M Confidential -ESTC Coating Group
2021/1/21 3M Confidential - ESTC Coating Group 5 Random Copolymer of IOA and AA or MAA Cohesive Strength (Shear) •Entanglements (High MW) •Association of Acid Groups Reduction of Inter-Molecular Motion Extends Rubbery Plateau Post Coating Cross-Linking !! Acrylate PSA’s