Coloration for a Greener Future

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Coloration for a Greener Future
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• DyeCat Ltd
• Spin-out company from the University of Leeds
• Company currently housed within the university
  accessing specialist lab facilities
• Investment Partners - Techtran Ltd (subsidiary
  of IP Group PLC) and the Viking Fund
• Vision
• Improving the performance, environmental impact
  and sustainability of coloration technology for
  synthetic textiles and other products

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The DyeCat Team

• Prof Chris Rayner
• Founder Director
• Head of Synthesis Research
• Organic synthesis
• Supercritical Carbon Dioxide
• Natural Dyes

• Dr Chris Pask
• Senior Scientist
• Synthetic chemistry
• Transition metal chemistry
• Nanotechnology
• Polymer processing

• Dr Richard Blackburn
• Founder Director
• Colour Chemistry
• Sustainable coloration polymers
• Natural dyes

• Phil Patterson
• Non-Executive Director
• Extensive experience in
• textile industry
• Ex MS Manager for
• Dyeing, finishing and printing

• Danny Lynham
• Investment Manager IP Group
• Investment and commercial partner
• Extensive experience with spin-out companies

• Dr Patrick McGowan
• Founder Director
• Organometallic catalysis
• New polymerisation methods
• Organometallic anti-cancer agents

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• Broad range of skills and understanding
• Design of new chemicals
• Design and use of new catalysts
• Colour science
• Dyeing technology
• Manufacturing of polymers for synthetic textiles
• Textile technology
• Textile manufacturing processes and supply
  chains (retail)
• Commercial processes and technology licensing

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• Contract Research and Consultancy Services
  Available!
• World Expertise in Organic Chemistry, Catalysis
  and Colour
• Chemistry
• Short-term Projects
• Fast Turn-Around
• High quality equipment and analysis
• Analytical Service
• Successful track record
• See website for more details

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• Hair Dyes

• Textile Coloration

• Harmful
• Suspect carcinogens
• Skin allergens

DyeCat

• Huge environmental impact
• Energy, transportation, water

• Highly persistent
• Polluting

• Effluent Treatment

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Technical Issues with Polymer Coloration

• Dyeing is a diffusion process withtechnical
  problems
• Uneven coloration
• Dye collects on surface of fibre
• High dye loadings to obtain dark colours
• Colours run and dyeings fade when washed

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DyeCat approach

• Coloration occurs when the polymer (fibre,
  plastic, etc.) is formed using a coloured DyeCat
  catalyst

• Dye is chemically locked-in to structure of
  material - perfectly colour-fast
• Complete eradication of wet dyeing step
• Added benefits for other markets (e.g. packaging)
• Patented as a general concept

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Benefits

• Economic benefits
• Elimination of dyeing process
• Environmental benefits
• Reduced water andenergy consumption
• Reduced pollution
• Technical benefits
• Homogeneous coloration
• Reduced dye requirements
• Dark colours easily obtained
• Vastly increased colour fastness

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Example materials PLA Polylactic acid

• Biodegradable thermoplastic
• Food packaging
• Woven textiles
• Biomedicals (sutures, dents, delivery
  systems....)
• DyeCat Method
• Stereoselectivity
• Coloured or non-coloured systems
• UV stability
• Naturally derived material
• Commercial interest
• Increased demand for recyclable materials

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Proof of concept successfully achieved for PLA
Polymer
Pellets
Fibre
Melt
Melt spin
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Fluorescent PLA

• Fluorescent markers/UV absorption can be easily
  introduced to PLA

UV
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Hair Dyeing

• Global hair dye market around 7bn
• EU hair dye market 2.6bn in 2004
• 70-80 permanent hair dyes
• gt60 women dye their hair
• 5-10 men
• 6-8 times per year
• European Commission, 2006
• Significant safety concerns over some components
• Many recent examples of severe allergic reactions
• Ingredients banned in some EU countries!

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Hair Dyeing Unwanted Chemicals

• p-Phenylenediamine,
  p-toluenediamine and resorcinol
• Found in many products
• Severe allergens
• Suspected carcinogens
• Ammonia (ammonium hydroxide)
• Severe allergen
• DyeCat approach
• Use a different system
• Natural compounds as dye precursors

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DyeCat Hair Dye Alternatives

• Permanent Colours
• Low toxicity
• Natural Dye Precursor Materials

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Effluent Treatment

• Water based effluent from dyeing of textiles
• Current clean-up techniques
• Chemicals for precipitation
• Adsorption
• Effluent contains traces of dye
• Some treatments cause environmental problems
• DyeCat approach
• Naturally derived material
• Renewable
• Biodegradable
• Commercial interest

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Effluent Treatment

• Initial studies show effective against a range of
  dye classes
• Disperse dyes
• Reactive dyes
• Acid dyes

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By using naturally derived materials, we aim to
reduce the environmental impact of coloration
processes, whilst delivering superior technical
performance.
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More Information / Contact Details
For general enquiries please contact Danny
Lynham Tel [phone] Fax 44 (0)870
803 4076 Email info_at_dyecat.com Web
www.dyecat.com Address DyeCat Limited 103
Clarendon Road Leeds LS2 9DF United Kingdom