Addi ves and Heat Stabilizer for PVC Plas sol

Transcription

1 Addi ves and Heat Stabilizer for PVC Plas sol A Sustainable Approach to Modern Coating Technology.

2 A Sustainable Approach to Modern Coating Technology Patcham FZC is a well-established manufacturer of specialty addi ves headquartered in the United Arab Emirates. Since its incep on, Patcham has steadily grown into a leading supplier of specialty addi ves for Paint & Coa ngs, Ink, PVC and Composite industries. The company s Pat-Add range of coa ng addi ves includes we ng & dispersing agents, defoamers, slip & leveling agents, rheology modifiers. Whilst keeping focus on environmental sustainability, the company produces products using green raw materials that are APEO free and have low or no VOC. These products are mul func onal and mul compa ble, which simplifies the produc on process, reduces the chance of errors and minimizes inventory thus improving cost effec veness. Patcham has built a strong manufacturing and R&D infrastructure that enables the rapid transi- on from concept to products. The company has strategically located technical service laboratories, offices and representa ves around the world to provide the most efficient customer service. In addi on, a well-developed robust supply chain network enables it to deliver its products and services to customers around the globe with minimal lead- me.

3 TABLE OF CONTENTS Introduc on Plas sols Applica ons Issues Patcham Addi ves We ng and Dispersing Agents Deaerators Patcham Addi ves Heat Stabilizers Kickers

4 Introduction What is a Plas sol? PVC Plas sol are liquid dispersion systems of polyvinyl chloride and PVC copolymer resin in compa ble plas cizers. The liquids may vary from viscosity from thin milk-like fluids to heavy pastes that have the consistency of molasses. Main Ingredients PVC Resin Plas cizers Addi ve Fillers Solvents Heat Stabilizers & Kickers Figure 1. Color Master Paste of Plastisol Applica on Figure 2. Various Applications of Plastisols The range of plas sol applica ons is extremely wide, and so is the variety of produc on methods. Plas sol products include the following: Ar ficial leather (e.g. gloves, boots) Automo ve ar ficial leather Dipped goods and dip coa ngs (e.g. tool handholds, bar ends) Toys (e.g. dolls, balls, toy, animals, anatomic models for educa on) Floorings Wall coverings Roofing membranes Carpet backing and heavy weight coa ngs Conveyor belts 1

5 Introduction Issues Raw Materials - Issues Long dispersion me Pigment streaks/incomplete we ng Flooding and floa ng of colorants Storage stability Rheology Factors - Issues High viscosity Poor air release due to pseudoplas c rheology Applica on - Issues Pinholes Air entrapment Shade varia ons Low produc on yield Figure 3. Long dispersion time Figure 4. Air entrapment Figure 5. Incomplete wetting/high viscosity 2

6 Patcham Additives We ng and dispersing addi ves Particle covered with wetting agent In dispersion of par cles in plas cizer, there are deficiencies that need to be corrected through the use of addi ves. High viscosity, long dispersion me, flooding and unstable pigment concentrates are some of the issues related to we ng and dispersion (Figure 3 and 4). Introduc on of energy by the use of machines through high shear will break down agglomerated par cles into its individual par cles. If these individual par cles are not fully stabilized, the finely distributed par cles reagglomerate and form flocculates (Figure 6). Pat-Add we ng and dispersing addi ves stabilize the dispersed par cles by adsorbing onto the surface of pigments or filler par cles. Electrosta c repulsion or steric hindrance (Figure 7) will govern on the stabiliza on of individual par cles of pigments/fillers. For the specific applica on, it is recommended that compa bility with the plas cizer should be considered for selec ng the best addi ve that will be u lized. Agglomerates Wetting agents Entrapped air Good wetting (adjusting surface tension liquid phase, through wetting agent): enabling high pigment solids low mill base viscosity high milling efficiency Figure 6. Wetting and dispersing process Dispersing medium Pigment Stabilization of HMV Polymer Right beaker: with wetting agent, flowable mill base Higher volume contributes to ticker adsorbed layer, preventing attractive forces to dominate stabilizing forces: stable dispersion! Thickness adsorption layer preventing agglomeration... Figure 7. Stabilization of dispersed particles Advantages of Pat-Add We ng and Dispersing Addi ves: Higher pigment loading with constant viscosity Shorter dispersion me Excellent we ng of pigments and fillers Improved flow behavior Increase product yield Improved color homogeneity Longer storage stability of dispersions 3

7 Patcham Additives Pat-Add DA 815 A mul -purpose solvent-free we ng and dispersing addi ve for PVC plas sol and thermoplas cs. Its electroneutral composi on enables it to stabilize organic and inorganic pigments, par cularly carbon blacks. Par cularly suitable for the produc on of PVC Colorants/ Color Master paste for PVC. Pat-Add DA 815 creates a Newtonian behavior of the material by reducing viscosity. Raw Materials Yellow Iron Oxide Phthalo Blue Carmine Red CI Number PY 42 PB 15:3 PR 122 DOP Pat-Add DA Pigment Total Table 1. Guide formulation with Pat-Add DA 815 Figure 8. Newtonian viscosity of Pat-Add DA 815 4

8 Patcham Additives Pat-Add DA 948 Pat-Add DA 948 is a High Molar Volume polymer, 100% ac ve dispersing agent for use in plas sol pigment concentrates. The product is specially designed for use in EP- and PUR flooring systems based on polyols, UPR (unsaturated polyester) Ingredients White R-902 SP.Black 4 PB 15:4 PR 112 PY 83 DOP Addi ve Pigment DOP Total % SOP Table 2. Color master paste guide formulation with Pat-Add DA 948 Viscosity a er one week stability at room temperature Pat-Add DA 948 Reference TiO2 Special Black 4 PB 15:4 PY 83 PR 112 Figure 10. Actual appearance of color master with Pat-Add DA 948 Applied Pat-Add DA 948 Plas sol Colorants Pat-Add DA 948 Plas sol Colorants 5

9 Patcham Additives Pat-Add DA 2025 Pat-Add DA 2025 is a we ng and dispersing agent for use in PVC plas sol. Pat-Add DA 2025 is most effec ve for main inorganic pigments, including tanium dioxide as well as extenders. Also for blowing agents such as ADC and zinc oxide. Figure 11. Pigment wetting of Pat-Add DA 2025 Raw Materials Parts by weight Reference Pat-Add DA 2025 Figure 12. Pat-Add DA 2025 in three-roll mill DOP ADC Powder Pat-Add DA Total Table 3. Guide formulation with Pat-Add DA 2025 Viscosity Depressant Profile Reference Pat-Add DA 2025 Viscosity Filler Loading Figure 13 shows Pat-Add DA 2025 will allow higher filler loading without high viscosity build up. This will enable the formulator to make highly filled plastisol without compromising work ability of the paste phr Pat-Add DA Viscosity Filler Loading 6

10 Patcham Additives Deaerators Pat-Add AF 5103 Pat-Add AF 5103 is a green bio based addi ve used as air release and de-airing agent. Pat-Add AF 5103 removes entrapped air in plas sol prepara ons and eliminates surface defects of cured plas sol ar cles. Key benefits of Pat-Add AF 5103: Remove entrapped air during plas sol prepara ons. Avoid surface defects like pin holes. A ain smooth finish. Work with higher volumes more easily. No adverse effect in foam applica ons. Performance of Pat-Add AF Blank Pat-Add AF % Air Trap On mixing After 48 hours 7

11 Patcham Additives Pat-Add DA 7006 Pat-Add DA 7006 is a medium vola le viscosity depressant for PVC plas sols. It keeps the plas sol mass workable over long period of storage and prevents viscosity build up. It also allows incorporating more filler by keeping same viscosity of the PVC plas sols. Main benefits are: High filler loading with constant viscosity Extremely effec ve for filler we ng Provides excellent stability of PVC plas sols without any sedimenta on Higher filler load at constant viscosity Filler content phr Blank phr Pat-Add DA 7006 Reduc on of surface resistance 100 Reduction in % phr Filler 8

12 Patcham Additives (PVC Heat Stabilizer) Issues PVC resin needs rela vely high processing temperatures Resin suffers heat degrada on at the lower temperature than processing temperature Results in loss of proper es Mechanical Colour Heat Stabilizers Type Grade Barium / Zinc Patstab 301 Patstab 303 Patstab 307 Low phenol, Nonylphenyl free Patstab Patstab 355 SF PTBBA, 2-EHA free Patstab 404 Patstab 405 PTBBA, 2-EHA free Calcium / Zinc Patstab 411 Patstab 410 Patstab 401 Patstab 409 Patstab 415 PTBBA, 2-EHA free phenol free Nonylphenyl free --- Kickers Kicker Potassium / Zinc Kicker Barium / Zinc Kicker Calcium/ Zinc Patstab 701 (Fast) Patstab702 (Medium) Patstab 321K ( Medium/ Fast) Patstab 419K ( Medium) Phenol free 9

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16 PATCHAM (FZC) P.O. Box: 7753, Saif Zone, Sharjah, UAE Tel: Fax: PATCHAM INDIA B-52, Pravasi Industrial Estate Vishweshwar Nagar, Off Aarey Road Goregoan (E), Mumbai (India) Tel: PATCHAM EUROPE BV Klavermaten DD Goor Netherlands eu@patchamltd.com PATCHAM USA LLC 10 Commerce Road Fairfield, New Jersey Tel: (201) Fax: (201) info@patchamusa.com The information given in this booklet is intended for technical guidance without obligation. Ver. 1.1