PolyasparticCoatings - Latest developments for …

1 PolyasparticCoatings - Latest developments for extending performancePDA Europe Conference, Vienna, November 18-20 Michael Casimir, Karl Wuehrer, Peg Kendi, page 2Do PolyasparticCoatings fit into the PDA ?Yes !Polyureais not a singular product made out of aliphatic polyether-amines and MDI-based prepolymersPolyureaoffers a wide range of properties and PolyasparticCoatings are just one example out of manysPure polyureaas pure PolyasparticCoatings are only based on amine-terminated resins and Michael Casimir, Karl Wuehrer, Peg Kendi, page 3 OOOOR'R'OOOOR'R'NHXNHS tructure of polyasparticestersProduct Solid content Equivalent weight Viscosity mPas Reactivity Desmophen NH 1520 100% 290 1500 low Desmophen NH 1420 100% 276 1500 mid Desmophen NH 1220 100% 234 100 high Michael Casimir, Karl Wuehrer.

2 Peg Kendi, page 4 Reaction to a PolyasparticCoating OOOONR1R2+R3 NCOR3 OOOOR1 NCNHR2 OHAspartic PolyasparticCoating Michael Casimir, Karl Wuehrer, Peg Kendi, page 5 Known properties of PolyasparticCoatings -Fast curing , improved productivity -Variable cure speed , 2 min 40 min-Low VOC , 80 % solid content (near zero VOC)-Thin to moderate film build , 100 600 m-Color and UV stable-Hard, durable film , very good abrasion resistance .2008-11 Michael Casimir, Karl Wuehrer, Peg Kendi, page 6 Still open questions-How to make flexible films ? -How to speed up reactivity without changing the materials ?

3 -How to extend pot life ?-How to increase chemical resistance ?-How to increase film thickness ?-How to reduce the viscosity ? -How to reduce raw material cost ?.2008-11 Michael Casimir, Karl Wuehrer, Peg Kendi, page 7 Still open questions-How to make flexible films ? Ideas :-Plasticizer-Polyolcombinations-New Michael Casimir, Karl Wuehrer, Peg Kendi, page 8 Still open questions-How to make flexible films ? Plasticizer use4% Elongation @ break% PlasticizerEffecton elongation-337% Plasticizer-205% Plasticizer-4 Control % Gloss loss (60 ) Michael Casimir, Karl Wuehrer, Peg Kendi, page 9 Still open questions-How to make flexible films ?

4 Plasticizer useAdvantages : Can reduce viscosity Does not influence reactivityDisadvantages : Effect on elongation very poor Can weaken the light stability Will squeeze out of the film at elevated temperaturesSummary : Not Michael Casimir, Karl Wuehrer, Peg Kendi, page 10 Still open questions-How to make flexible films ?PolyolcombinationsOptions : -Polyester-polyoles to be tested-Polyether-polyoles negative influence on UV stability(chalking/cracking)-NOPs 2 NOPstested, incompatibility-Polyacrylate-polyoles solvent free products to high in Michael Casimir, Karl Wuehrer, Peg Kendi, page 11 Still open questions-How to make flexible films ?

5 PolyolcombinationsPolyester-polyol, example120%50% polyester polyol94%33% polyester polyol4%15% polyester polyol% Elongation @ break% Michael Casimir, Karl Wuehrer, Peg Kendi, page 12 Still open questions0100002000030000400005000060000 05101520253035viscosity(mPa s)time (min)-How to make flexible films ?PolyolcombinationsPolyester-polyol, Michael Casimir, Karl Wuehrer, Peg Kendi, page 13 Still open questions-How to make flexible films ? PolyolcombinationsPolyester-polyolesAdva ntages : Does influence elongation Can increase light stabilityDisadvantages : Still a high amount needed Compatibility has to be tested for each productSummary : In general polyolcombinations are not Michael Casimir, Karl Wuehrer, Peg Kendi, page 14 Still open questions-How to make flexible films ?

6 New Polyasparticester New experimental products were developed. Very good influence on the elongation Fast and moderate reactivity possible But registration issues in the EU and other regions / countriesSummary : For the time being not an option in most parts of the Michael Casimir, Karl Wuehrer, Peg Kendi, page 15 Still open questions-How to make flexible films ? IsocyanatemodificationsStandard isocyanate: Low viscose asymetricHDI trimerDesmodurXP 2410 NCO : % , viscosity @ 23 C : 700 mPa s, F = modifications : HDI-oligomerDesmodurN 3400 NCO : 22 % , viscosity @ 23 C : 150 mPa s symetricHDI-trimerDesmodurN 3600 NCO : % , viscosity @ 23 C : 1200 mPa s modified HDI-trimerDesmodurN 3800 NCO : 11 % , viscosity @ 23 C : 6000 mPa s HDI-/IPDI-polyisocyanateDesmodurNZ1 NCO : % , viscosity @ 23 C : 700 mPa s HDI-polyether-prepolymerDesmodurXP 2599 NCO : 6 % , viscosity @ 23 C.

7 2500 mPa Michael Casimir, Karl Wuehrer, Peg Kendi, page 16 Still open questions-How to make flexible films ? Isocyanatemodifications< 2%Standard100 %HDI-polyether-prepolymer< 2%HDI-/IPDI-polyisocyanate110 %ModifiedHDI-trimer< 2%SymetricHDI-trimer160 %HDI-oligomer% Elongation @ breakModification (100%).2008-11 Michael Casimir, Karl Wuehrer, Peg Kendi, page 17 Still open questions-How to make flexible films ? IsocyanatemodificationsModification with modified HDI-trimer110%100%40 %75%10 %50%5 %25%< 2 %0% Elongation @ break% Michael Casimir, Karl Wuehrer, Peg Kendi, page 18 Still open questions-How to make flexible films ?

8 IsocyanatemodificationsModification with modified HDI-polyether-prepolymer70 %75%6 %50%4 %25%%Elongation @ break% Michael Casimir, Karl Wuehrer, Peg Kendi, page 19 Still open questions-How to make flexible films ? IsocyanatemodificationsAdvantages : Does influence elongation Can decrease viscosity Mechanical properties can be adjusted by blending different isocyanates Can reduce viscosityDisadvantages : Handling of another raw materialSummary : Modification of Michael Casimir, Karl Wuehrer, Peg Kendi, page 20 Still open questions-How to speed up reactivity without changing raw materials ? Tertiary Addocat PP from RheinChemieRheinauGmbH Light stabilizer Ciba TINUVIN 292 / 1130 (1:1)from Ciba Specialty Chemicals :-DBTL will reduce the reactivity-The right amount has to be tested with the actual Michael Casimir, Karl Wuehrer, Peg Kendi, page 21 Still open questions-How to extend pot life ?

9 Hardener VP LS 2959or Incozol2from Industrial Copolymers Ltd Molecular sieve powder 4 Sylosiv A4from W. R. Grace & Co15 minStandard60 minSylosivA4 , % on formulation23 minOxazolidine, % on formulationPot life @ 23 C , Michael Casimir, Karl Wuehrer, Peg Kendi, page 22 Still open questions-How to increase chemical resistance ? Combination with other polyoles:Not an optionSee page 10 13 Increase cross linking NCO : NH : suitable option right nowImportant Note :Existing patent for the Michael Casimir, Karl Wuehrer, Peg Kendi, page 23 Still open questions-How to increase film thickness ?

10 The limitation of the film thickness, approx. 300 m roller application, is based on humidity/moisture influences during the curing time. Molecular sieve powder 4 Sylosiv A4from W. R. Grace & Co Degasing:degasingof the comp. B (polyisocyanate)increases the max. DFT due to higher solubility of CO2 in the liquid Michael Casimir, Karl Wuehrer, Peg Kendi, page 24 Still open questions-How to reduce viscosity ? Reactive diluents :Aldimines/ DesmophenLS 2963A + VP LS 2142limitation @ approx. 5% addition due torapidskin formation and yellowing Isocyanatecombinations :a blend with a low viscose isocyanate, DesmodurN 3400 Plasticizer :not an option, see page 9 Solvents :due to VOC regulation in most casesnot an Michael Casimir, Karl Wuehrer, Peg Kendi, page 25 Still open questions-How to reduce raw material costs ?