New resin developments for VOC compliant solvent based acrylic coatings

Transcription

1 New resin developments for VOC compliant solvent based acrylic coatings ACC 2010, Charlotte, NC April 13th, 2010 Grerg Macri/ Andreas Olschewski New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 2

2 Evonik Industries: Chemicals, Energy and Real Estate 1843 Platzhalter Bild Evonik Degussa GmbH Platzhalter Bild Evonik Steag GmbH Evonik at a Glance (2008) Employees: ca. 40,800 Turnover: ca bn Platzhalter Bild Evonik Immobilien GmbH April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 3 Application fields of thermoplastic methacrylic resins Marine & Container Coatings Plastic Coatings Printing Inks Ceramic Transfer Lacquers Architectural Coatings PVC Finishes Foils & Sheets Metal Coatings Aerosols Hot Stamping April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 4

3 New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 5 Different production processes to manufacture acrylic resins Suspensionpolymerisation Polymerisation occurs in monomer droplets present in water which are stabilized by protective colloids. Monomer soluble initiator. April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 6

4 Different production processes to manufacture acrylic resins Continuous direct polymerisation CDP TM Polymerisation takes place within the monomers. Initiator and chain transfer agent are monomersoluble. The solid product is granulated. : April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 7 Different production processes to manufacture acrylic resins Spray dried emulsion polymerisation Polymerisation occurs in an emulsion. The monomers migrate via the water phase into micelles and polymerise there. Spray drying of the water based emulsion is the final step April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 8

5 Different production processes to manufacture acrylic resins Solution Polymerisation Polymerisation takes place in solution. Monomers, Initiator and chain transfer agent are dissolved in the solvent. April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 9 New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 10

6 Methacrylic polymers for universal applications Viscosity of a methacrylic resin (Mw ) in comparison to a methacrylic resin (Mw ) dissolved in different solvents concentration 45% 5000 Viscosity (mpas) Acrylic resin (Mw ) Acrylic resin (Mw ) Toluol MEK Ethylacetat Aromatic 100 April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 11 Methacrylic polymers for universal applications Viscosity (mpas) Changing of the viscosity of a methacrylic resin (Mw ) solution (55% in Aromatic 100) Variation of the co binder/ plasticizer Replacing 5 % of the acrylic binder other cobinders/ plasticizer resin alone Laropal K 80 Santicizer 261 A Vestinol 9 Resamin HF 480 Desavin Palamoll 632 Mesamol II Palatinol AH Santicizer 148 April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 12

7 New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 13 DEGALAN LP 65/11 Application/ Instruction for use High solid metal coatings, extraordinary adhesion onto galvanised iron Masonry paints and concrete coatings placeholder visual Compatible with most PVC copolymers, nitrocellulose, chlorinated rubber, cellulose acetobutyrates and plasticizer placeholder visual Soluble in: Esters, ketones, aromatics, glycol ether, blendable with alcohols and hydrocarbons April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 14

8 DEGALAN LP 65/11 placeholder visual Technical Data: Glass transition temperature : ca. 51 C Dynamic viscosity 40 % in MEK: ca. 50 mpas Acid number: ca. 8.5 mg KOH/g Mol. weight: ca g/mol Viscosity number: ca. 19 ccm/g Soluble in: Esters, ketones, aromatics, glykol ethers placeholder visual April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 15 DEGALAN LP 65/11 Application Technology Solution viscosity of different polymers 40 % in Solvesso 100 Vicosity (mpas) Reference 0 DEGALAN LP 65/11 DEGALAN LP 64/11 DEGALAN LP 64/12 DEGALAN LP 65/12 DEGALAN PM 381 April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 16

9 DEGALAN LP 65/11 Application Technology Accelerated weathering Pigmentation - 1:0.5 with titanium dioxide (KRONOS 2059) Development of the gloss level Similar weatherability in comparison to DEGALAN LP 64/11 and LP 65/12 Gloss units (GE) Accelerated weathering of DEGALAN LP 65/11 in comparison to DEGALAN LP 64/11 and DEGALAN LP 65/12 - Development of the gloss level DEGALAN LP 65/11 DEGALAN LP 64/11 DEGALAN LP 65/ hours QU-V meter/ UV B April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 17 DEGALAN LP 65/11 Outstanding properties of the polymer Low molecular weight Fast solvent release Tough, impact resistant film Very good adhesion onto steel and galvanised iron, but also other substrates Development of formulation with low VOC content of 350 g/l possible April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 18

10 New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 19 Research activities Development of methacrylic high solid thermoplastic resin Using of specific monomers bulky side chain monomers >>>> reduction of the polymer solution viscosity Negative impacts.. Low Mw leads to brittle and often too soft films Slow drying Reduced weather ability April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 20

11 Research activities Focus: VOC compliance of a methacrylic resin Development of product with - Lower viscosity contribution in uncured state less solvent required - Unchanged handling (preferred solid bead polymer) - Same application technology performance Conventional polymer Modified polymer Crosslinked coating film Ambient Condition Curing April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 21 Research activities Curing Mechanisms O 2 Oxidative curing Day light curing April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 22

12 Research activities Experimental product Solution grade: Solid content: 65 % Viscosity: mpas Mw: Compared to a bead polymer Mw: April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 23 Research activities Comparison of polymers in a starting formulation ( =reference) Pos. P. b. w. P. b. w. P. b. w. pigment) X X Solution polymer (60% in xylene) - polymer Mw = X 66.7 X Solution polymer (60% in xylene) - polymer Mw = X X 65.2 Bead polymer (40% in xylene) - polymer Mw = X 0,16 X drier TiO 2 pigment iron oxide red xylene Solid content (%) Viscosity (mpas) April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 24

13 Research activities Development of hardness of solution grade (Mw ) in comparison to a solid methacrylic resin (Mw ) Pigmented film, drying in a climatized room (23 C/ 50 % RH) Pendulum hardness [sec] Solution grade no dryer 1 d RT 28 d RT 1 d RT Solution grade dryer added 28 d RT 1 d RT 1 Formulation 2 3 Solid acrylic resin 28 d RT April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 25 Research activities 90 QUV meter test - Comparison of low and medium solid methacrylic resin 80 Gloss value Solution polymer (60% in xylene) - Mw = Formulation 1 Solution polymer (60% in xylene) Mw = dryer Formulation 2 Bead polymer (40% in xylene) - Mw = Formulation 3 0 Start 500 hours hours hours April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 26

14 New resin developments for VOC compliant solvent based acrylic coatings Agenda General Different production processes to manufacture acrylic resins Solution viscosity differences between resins with different Mw New polymer DEGALAN LP 65/11 Research activities cross-linking process via oxidative hardening Summary April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 27 New resin developments for VOC compliant solvent based acrylic coatings Summary Acrylic polymers are been known since the 1930s. The variety of monomers enables to tailor made polymers for a wide range of diverse application are possible Technical reason for using acrylic resins are mainly weather ability, UV-stability, no discoloration, gloss retention and alkaline resistance. Low moleculare methacrylic thermoplastic resins do have deficits in regards of slow drying, brittleness, softness and weather ability Oxidative cross-linking accelerates the film hardness and film performance of a low Mw thermoplastic methacrylic resin April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 28

15 April 13, 2010 New Resin Developments for VOC Compliant Solvent Based Acrylic Coatings Page 29