Capa Polyols. For excellent properties in crosslinked coatings. European Coating SHOW 2013 Nürnberg Pär Jörgensen Specialist

Transcription

1 Capa Polyols For excellent properties in crosslinked coatings European Coating SHOW 2013 Nürnberg Pär Jörgensen Specialist

2 Outline Introduction of Perstorp Introduction of Caprolactones (Capa ) Use of Capa polyols in 2K PUR high solid coatings Use of Capa polyols in 1K systems based on HMMM crosslinkers Conclusions

3 Perstorp today The Perstorp Group 1881 Perstorp was formed Family owned for more than 100 years Since 2005 controlled by PAI partners, a French private equity company Approximately 1,500 employees in 22 countries Annual turnover of around 1.3 billion EUR World leader of several products for resins and paints

4 What are Capa Caprolactones? Capa monomer One grade 99.9% purity Capa polyols Produced by ring opening polymerization of Capa monomer initiated with hydroxyl groups Di, tri, tetra-functional polyols 300-8,000 g/mol Perstorp biggest supplier of caprolactones in the world

5 Capa Polyols for crosslinked coatings Caprolactones are aliphatic, liquid, low viscosity polyols suitable as reactive diluents Product Type Mw OH-value (mg KOH/g) OH % Viscosity C) Recommendation Capa 2043 Diol K PUR/ 1K HMMM Capa 2054 Diol K HMMM Capa 2085 Diol K HMMM Capa 3050 Triol ,190 2K PUR Capa 3091 Triol ,246 2K PUR/1K HMMM Capa 4101 Tetrol 1, ,850 2K PUR General properties Low VOC High gloss and low haze due to perfect compatibility between Capa, acrylics, polyesters and crosslinkers Good final hardness Excellent chemical resistance Excellent outdoor durability

6 Capa in 2K PUR Formulations A B C Part A Reference system Acrylic/Capa 3050 Higher amount of Capa 3050 Acrylic polyol (75% in BuAc) Polyester ref (78% in BuAc) Capa 3050 Solvent mixture (BuAc+Solvesso 100+MAK)* Additive package** DBTL (1% BuAc) 4.5% OH 5.4% OH 9.4% OH Total Part B NCO/OH Tolonate HDT LV2 Solvent mixture (BuAc+Solvesso 100+MAK)* to adjust viscosity to 22 sec in DIN cup 4 at 23 C * Solvent ratio 8:67:25 ** BYK-315, BYK-322. BYK-358 In formulation B Capa is added to match the OH content of the polyester reference. Formulation C contains twice that amount while keeping an equal OH/NCO molar ratio.

7 Capa in 2K PUR Effect on VOC VOC in g/l to obtain 22 sec in DIN cup 4 at 23 C g/l A - Reference system B - Acrylic/Capa 3050 C - Acrylic/2*Capa 3050 By addition of Capa to the formulation it is possible to further decrease the VOC content without compromising the viscosity

8 Capa in 2K PUR Scratch resistance Scratch resistance was performed on Taber Model 550 (rotation speed 0.5 tr/min) Applied on Taber glass panels (hole in the center) at RT Weight (force) needed to obtain permanent scratch, weight in g A - Reference system B - Acrylic/Capa 3050 C - Acrylic/2*Capa 3050 The resistance of the coatings towards permanent scratches is largely increased with the addition of Capa polycaprolactones

9 Capa in 2K PUR Abrasion resistance Taber abrasion on steel CS10 wheels, 500 g load, 1,000 cycles, weight loss, mg Mg of coating removed during the abrasion A - Reference system B - Acrylic/Capa 3050 C - Acrylic/2*Capa 3050 The coating formulations containing Capa polycaprolactones show a superior abrasion resistance compared to the reference formulation containing a conventional polyester

10 Capa in 2K PUR QUV-B exposure Decrease in gloss at 20 Acceleratedweathering(QUV-B) Relative gloss decrease, % Measured on Al panels: 45µm dry of clearcoat over white basecoat Cycle: Succession of 4 hours periods of UV-B exposure at 60 C each followed by 4 hours periods of condensation at 40 C A - Reference system B - Acrylic/Capa 3050 C - Acrylic/2*Capa 3050 h in QUV-B Coatings containing Capa polycaprolactones are more resistant to UV-B exposure in terms of gloss retention

11 Capa in 1K HMMM Formulations Set parameters Polyol Acrylic/Capa Polyols Varied parameters Acrylic polyol ref % Crosslinker (HMMM) Cymel 303* Capa Polyols 0-30% Solvent Catalyst BuAc ptsa Mw of Capa polyols Branching of Capa polyols 2-3 Solid content 73% Polyol/melamine (solid) 80/20 OH-value of Capa Polyols (mg KOH/g) Curing 150 C, 10min * Cytec General properties Excellent appearance/compatility Good hardness Excellent chemical resistance

12 Capa in 1K HMMM Flexibility 5 Erichsen flexibility Effect of increasing concentration of Capa Polyols 5 Erichsen flexibility Effect of M w of Capa Diols (20%) 4 4 Capa mm 2 mm 2 Capa 2043 Capa Capa Polyols wt% Capa Diols M w (g/mol) Capa 2043 Capa 3091 Significant effect on flexibility due to flexible aliphatic chains Influenced by both amount and length of Capa

13 Capa in 1K HMMM Impact resistance Inch-lbs Impact resistance Effect of increasing concentration of Capa Polyols Capa 2043 Capa 3091 Capa Polyols wt% Significant increase of impact resistance due to flexible aliphatic chains A winning formula for performance

14 Capa in 1K HMMM Self healing Relative gloss recovery (%) Gloss recovery -20 C Effect of increasing concentration of Capa Polyols Capa 2043 Capa 3091 Capa Polyols wt% Method: Scratching: 25 double rubs with scotch brite Recovery: C Significant improvement of gloss recovery Semicrystallinity, less internal stress and viscoelastic properties of cured coating

15 Capa polyols in coatings Conclusions 100% solids, liquid at room temperature, low viscosity polyols positive impact on VOC no compromise on final hardness Capa polyols are aliphatic polyesters excellent weather resistance Highly transparent materials with excellent optical properties perfect compatibility between Capa Polyols, acrylics, polyesters and crosslinkers positive impact on film appearance (high gloss, low haze) Flexibility/toughness outstanding impact resistance and flexibility best-in-class for abrasion resistance Selfhealing effect Good gloss recovery

16 Thank you for your attention! Please visit us in hall 7A, stand no. 623