Development of New Products for Cleaning

Transcription

1 Development of New Products for Cleaning Joan E. Bartelt, Ph.D Technical Service, DuPont Vertrel specialty fluids (302) Process Cleaning Expo 2011 Columbus, Ohio April 19-21, 2011

2 Presentation Outline Challenges Facing the Cleaning Industry Solvent selection process Discussion of new HFO chemistries Final Message

3 Challenges to Solvent Cleaning Industry Segmented market and requirements Large volume low cost degreasing (npb, chlorinateds) Low volume high performance precision cleaning (HFCs, HFEs)

4 Top Factors Influencing Product Selection for Users Flammability Exposure level to workers Performance Cost Solvent and Equipment Material compatibility plus factors for new solvent suppliers. New chemical registrations (EPA, REACH, etc) Product stewardship considerations (cradle-to-grave)

5 DuPont Next Generation Solvents Program Discover and commercialize a wide range of new solvents to satisfy the safety, environmental, and performance requirements of solvent users around the world Safety (lower risks due to toxicity or flammability) Environmental (keep ZERO ODP while reducing GWP and VOC) Performance (provide improved cleaning and deposition properties)

6 Candidate Selection Process for New Chemicals 100 chemical structures of interest 50 nonflammable 10 manufactureable 3 acceptable to EPA, REACH, etc. 3 5 years development timeline 1 industry acceptable due to performance and cost

7 History of Fluorinated Solvents High ODP Low ODP Zero ODP Zero ODP and Very Low GWP CFC-113 HCFC-141b HCFC-225 HFC HFC-365 HFC-447 HFEs HFO s HFX-110 HFX-33 (PFCs)

8 Fluorinated Chemistry Examples & GWP Structures Example Atm. Lifetime GWP 100yr C-F PFC yr 9300 C-F-O PFPE 800 > 10, 000 C-F x Cl y CFC C-F x Cl y H z HCFC-141b C-F x H z HFC-43-10mee C-F x H z O q HFE C=CF x H z HFO-1234yf 11 days 4 new new days < 10

9 HFX-110 Developmental Product Boiling Point: > 100 deg C Flammability: None Environmental Properties: ODP: Zero GWP: < 10 Typical Cleaning Applications: Fluorinated lubricant cleaning and deposition Particulate removal Ionics removal Toxicity Tests: Low acute tox (LD 50 > 5000 mg/kg) Low repeated dose tox Not mutagenic (Ames) Not skin or eye irritant

10 HFX-33 Developmental Product Rf 1 Cx= Cy Rf 2 HFO Chemistry: Hydrofluoroolefin No Chlorine Zero ODP Olefin Low GWP Boiling Point is 33C

11 Safety Toxicity: Toxicology results to date are favorable LC 50, Skin Irritation, Ames, Chrom. Ab., Cardiac Sentitization, 28-day and 90-day repeated dose Studies are nearing completion Flammability: No closed cup flash point No vapor flammability (ASTM 60 and 100C

12 Environmental Properties Ozone Depletion Potential: Zero (No chlorine) Global Warming Potential: < 10 Volatile Organic Carbon MIR: evaluations pending

13 Performance Boiling Point: 33 deg C Good performance in preliminary cleaning tests for these soils: fluorinated oils & lubes hydraulic fluids some oils particulate contamination

14 Compatibility with Metals Changes after 2 weeks at 100 o C (212 o F) Metal Weight Loss Surface Appearance Solvent Appearance Fluoride IC Aluminum NONE No Change Clear, colorless < 0.5 ppm Copper NONE No Change Clear, colorless < 0.5 ppm Brass NONE No Change Clear, colorless < 0.5 ppm Stainless Steel Carbon Steel NONE No Change Clear, colorless < 0.5 ppm NONE No Change Clear, colorless < 0.5 ppm

15 Compatibility with Elastomers Changes after 2 weeks room temperature Symbol Material Brand NR Natural Rubber Natural Rubber CR Polychloroprene Neoprene W NBR Acrylonitrile Butadiene BUNA N CSM Chlorosulfonated Polyethylene Hypalon 40 FFKM Fluoroelastomer Kalrez T Polysulfide THIOKOL FA IIR Isobutylene Isoprene Butyl Rubber EPDM Hydrocarbon (Ethylene-Propylene Terpolymer) Nordel % Weight Change % Volume Change % Hardness Change 4.4% 1.9% 0.0% 0.8% 0.1% 0.0% 15.3% 2.6% -13.6% 0.2% 0.8% -1.3% 7.9% -3.4% -2.9% 0.3% 6.7% -6.1% 0.3% 13.1% -13.3% 1.4% 5.5% -7.1%

16 Compatibility with Plastics Changes after 2 weeks room temperature Symbol Material Brand % Weight Change % Volume Change % Hardness Change ABS Acrylonitrile-butadiene-styrene Cycolac EX % -0.6% 0.0% HIPS High Impact Polystyrene 0.3% -0.4% -2.9% PET Poly(ethylene terephthalate) Rynite 0.0% 0.7% -1.2% PS Polystyrene Styron -0. 4% 0.9% 0.0% PVC Polyvinyl Choloride Bakelite 0.0% 0.0% 0.0% CPVC Chlorinated Polyvinyl Choloride 0.0% -0.3% 0.0% PTFE Fluorocabon(PTFE) Teflon 1.1% 0.3% -17.2% ETFE Fluorocabon(ET FE) Tefzel 0.7% 0.0% 12.9% Ionomer Surlyn 0.3% 0.0% 1.9% POM Acetal Delrin 0.1% -1.2% -1.3% PC Polycarbonate Tuffak 0.0% -0.6% 0.0% PEEK Polyetheretherketone Victrex 0.0% 0.2% 0.0% Polyarylate Arylon 0.2% -0.2% -4.4% LCP Polyester Xydar 0.0% -0.4% -1.5% Nylon 6/ 6 Zytel % -0.5% 3.1% PEI Polyetherimide Ultem -0. 1% 0.0% 0.0% Polyaryl sulfone Radel -0.2% 0.3% 0.0% PVDF Poly(vinylidene fluoride) Kynar 0.1% -0.3% 0.0% PP Polypropylene Tenite 0.3% -0.5% 0.0% LCP Zenite -0. 1% -0.9% 0.0% HDPE High Density Polyethylene Alathon 0.0% 0.3% 3.3% Phenolic Duzez 0.0% -0.1% 1.2%

17 Final Message New chemistries have opened up a large number of low GWP candidates that are actively under development and evaluation by DuPont More information DuPont booth or by contacting: Robert Lee, NA Sales Manager, DuPont Vertrel specialty Robert.A.Lee@usa.dupont.com or (302)

18 Thank you! Disclaimer: The information set forth herein is furnished free of charge and based on technical data that DuPont believes to be reliable. It is intended for use by persons having technical skill, at their own risk. Since conditions of use are outside our control, we make no warranties, expressed or implied and assume no liability in connection with any use of this information. Nothing herein is to be taken as a license to operate under, or a recommendation to infringe any patents or patent applications.