Drying & Paint Curing

What is Ellipsometry?

Ellipsometry measures a change in polarisation as light reflects or transmits from a material structure. The polarisation change is represented as an amplitude ratio, Ψ, and the phase difference, Δ. The measured response depends on optical properties and thickness of individual materials. Thus, ellipsometry is primarily used to determine film thickness and optical constants. However, it is also applied to characterise composition, crystallinity, roughness, doping concentration, and other material properties associated with a change in optical response.

Since the 1960s, as ellipsometry developed to provide the sensitivity necessary to measure nanometer-scale layers used in microelectronics, interest in ellipsometry has grown steadily. Today, the range of its applications has spread to the basic research in optical coating, physical sciences, semiconductor and data storage solutions, flat panel display, communication, biosensor industries. This widespread use is explained by increased dependence on thin films in many areas and the flexibility of ellipsometry to measure most material types: biological coatings, composites of materials, dielectrics, semiconductors, metals, superconductors and organics.  Find out more about J A Woollam at https://youtu.be/szkqdcoclkQ.  The UK Distributor, Quantum Design UK hold annual workshops which include an introduction, fundamentals of ellipsometric data analysis, and an overview of ellipsometric applications in both research and production.  Contact Angela Carslake for more information on the next workshop and register your interest.

alpha SE Spectroscopic Ellipsometer

J A Woollam alpha SE Spectroscopic Ellipsometer –
for spectral range of 380-900 nm

For routine measurements of thin film thickness and refractive index, this ellipsometer allows you to mount a sample, choose the model that matches your film, and press “measure”. You have results within seconds.

With fast measurement speed and push-button operation, the alpha-SE® is ideal for qualifying thin films. Single-layer dielectrics on silicon or glass substrates can be measured in seconds.

Coatings on Glass:  Patented technology allows accurate measurements on any substrate: metal, semiconductor, or glass. On transparent substrates, the alpha-SE® measures depolarisation to correct for light returning from the backside of the substrate. This unwanted light can confuse other ellipsometers, but the alpha-SE® ensures accurate optical constants.

Key Features:

  • Easy to use:  Push-button operation is complemented by advanced software that takes care of the work for you
  • Proven spectroscopic ellipsometer technology gives you both thickness and index with much higher certainty than other techniques
  • Works with your materials – dielectrics, semiconductors, organics, and more
  • Spectroscopic ellipsometry for simple sample systems
  • Hundreds of wavelengths simultaneously collected in seconds for immediate results

Quantum Design represent J A Woollam in the UK and Ireland.  Please contact Shayz Ikram for more information on the alpha-SE ellipsometer.

Introduction to the alpha-SE Spectroscopic Ellipsometer

Press Releases

allnex launches A-Cure selector tool on their website

ACURE™ – Game Changing New Resin Chemistry for Coatings

ACURE™ is a new, non-isocyanate resin chemistry for coatings based on Michael Addition. Historically the Michael Addition has been too fast and difficult to control for practical use on coatings. Allnex has developed and patented new technology which harnesses ACURE™ ’s speed via use of a unique C02 blocked catalyst and kinetic control additives which give the paint formulator the tools needed to manage ACURE™ ’s use across a number of different applications and application conditions. This proprietary technology gives ACURE™ it’s ACURE™ – What’s “Under the Hood”?

In ACURE™ systems, allnex typically uses a relatively low molecular weight malonated polyester with a relatively low molecular weight acrylate like diTMPTA as its primary Michael Addition reactants. To enable Michael Addition, a strong base catalyst is needed. To enable Michael Addition’s extremely fast cure and create potlife, allnex blocked the catalyst with carbon dioxide. This approach preserves the inherently fast curing kinetics of Michael Addition while remarkably providing hours of potlife, orders of magnitude beyond those seen in typical 2k isocyanate or other chemistries.
ACURE™ chemistry is further enhanced by the use of kinetic additives which are used to slow the system further, providing the formulator with additional degree’s of control so as to manage coatings properties including open time, appearance in thick films and coating performance in varying environmental conditions.
Alternatives to Polyurethane systems don’t come easily. ACURE™ provides coatings properties never before seen in the Coatings Industry. If you’re looking for an Eco Friendly, Green Polyurethane coating system – ACURE  has arrived.

For UK info/samples please contact your Tennants representatives who will also be happy to assist

We invite you to check out the new page by visiting https://acure-coating-resins.com/

BCF calls for further changes to UK REACH after small step in the right direction

The British Coatings Federation has welcomed recent proposed changes to the forthcoming UK REACH regime as a small but welcome step in the right direction. However, it has also warned that these changes alone will not be enough to prevent the coatings sector – and wider chemicals industry – from being hit hard financially under the new post-Brexit regime. This is because it does still not resolve the underlying, inherent problems with the proposed UK REACH system namely duplication of the EU REACH system and re-registration of all substances in a new database. It is this wholesale re-registration – including full data dossiers duplicating registrations already held in the EU REACH system – which will prove so bureaucratic, burdensome, and costly to business.

The easiest and seemingly best way to avoid this wholesale duplication would be for the UK and EU to negotiate a data-sharing agreement as part of the ongoing Free Trade Agreement talks. This would potentially mean the UK regulator would maintain access to data already registered in the EU REACH database and avoid it having to be re-registered in the new UK REACH system. The BCF fully supports the UK Government’s attempts to achieve this result as part of the FTA talks.

However, if that data-sharing outcome is not achieved as part of an FTA, the Government needs to go further and initiate greater changes to the proposed UK REACH system. The time extension for substance registrations simply spreads the cost of the registration requirements over a longer period: it does not reduce the overall cost to business. Those additional costs will still make it uneconomic for some lower quantity substances to be registered in the UK REACH database, making them unavailable in the UK and leaving UK companies at a significant disadvantage to their EU counterparts. Alternatively, UK businesses will have to take on the registration costs themselves to maintain access to crucial substances, again putting them at a competitive disadvantage.

Tom Bowtell, CEO of the British Coatings Federation said:

“Along with others we have been actively and positively engaged in conversations with the UK Government for well over a year. It is good to see that the Government has listened to the genuine concerns industry has raised and amended their plans for UK REACH. However, while we welcome the changes as a step in the right direction, sadly we do not believe the scale of the amendments are enough to offset the large costs and inconveniences UK business will suffer at the hands of UK REACH system as it stands.

“We hope that a data-sharing agreement on chemicals can be negotiated between the UK and EU as part of an FTA, and fully support the Government as it continues to work for that outcome: it would seem to be the most practical solution to this problem. However, if such an agreement does not come to pass then we hope the Government will continue to engage with, and listen to, the continued concerns of industry. Ultimately, we hope they realise we are not crying wolf over the impact of UK REACH on companies using chemicals like the paint, coatings and printing ink industries, and agree to make further amendments to their plans that will mitigate the effect of the new UK regulatory system on business.”

Self-healing additives for improved corrosion resistance and coating adhesion after damage

Autonomic Materials is the recognized leader in self-healing additive technology for high-performance coatings, adhesives and sealants.  For a broad range of coating applications, from consumer to heavy industrial, Autonomic’s products impart unparalleled corrosion resistance, adhesion enhancement and extended service life after damage.

SELF-HEALING COATINGS FOR IMPROVED SUBSTRATE PROTECTION

Autonomic’s self-healing technology repairs coating damage immediately after it occurs. Autonomic’s microencapsulated additives are compatible with most solventborne, waterborne and powder coatings and provide improved protection to metals, wood, concrete, plastic, composite and other substrates. Three series of products are available in both wet and dry form:

  • Amparmor 1000 – Dual capsule system based on reactive silicone polymers with ability to cure under water
  • Amparmor 2000 – Single capsule system based on solvent-promoted cure of epoxy resins
  • Amparmor 3000 – Single capsule system based on oxygen-initiated cross-linking of functionalized alkyd resins

HOW THE SYSTEM WORKS

GENERAL APPLICATION GUIDELINES

AMPARMOR microcapsules are not recommended for addition to fully formulated coatings. Some degree of coating reformulation is typically required, including:

  • Adjustment of pigment volume concentration
  • Adjustment of pigment size distribution
  • Adjustment of resin chemistry to achieve desired Tg
  • Proper selection of dispersing aids

Autonomic’s self-healing microcapsules are stable under typical storage conditions. Caution must be exercised when incorporating capsules into coating formulations as excess shear and/or grinding may cause capsules to rupture.

 

  • For liquid coatings, the addition of microcapsules is recommended during the letdown stage.
  • For powder coatings, capsules should be added as a dry blend after extrudate grinding.

 

PRODUCT SELECTION GUIDES FOR COATING

CONTACT US

DKSH Great Britain Ltd. is distributor for Autonomic Materials in the United Kingdom.

For more information on these innovative products, contact Richard Nathan, Sales Manager, Speciality Chemicals Industry, DKSH Great Britain at richard.nathan@dksh.com, phone: +44 20 8879 5500

 

ABOUT DKSH

DKSH is the leading Market Expansion Services provider with a focus on Asia. The Group helps companies to grow across the Business Units Healthcare, Consumer Goods, Performance Materials and Technology. The service portfolio covers sourcing, market insights, marketing and sales, eCommerce, distribution and logistics as well as after-sales services. Publicly listed on the SIX Swiss Exchange, the Group operates in 36 markets with 33,350 specialists, generating net sales of CHF 11.6 billion in 2019. With its Swiss heritage, DKSH has been deeply rooted in Asia Pacific since 1865. The DKSH Business Unit Performance Materials distributes specialty chemicals and ingredients for food, pharmaceutical, personal care and various industrial applications. With 46 innovation centers and regulatory support worldwide, we create cutting-edge formulations that comply with local regulations. With around 1,100 specialists, the Business Unit generated net sales of CHF 1.0 billion in 2019. Learn more: www.dksh.com/pm

Why it’s time to embrace digital colour masters

A combination of digital standards and industry-leading instruments enables businesses to reduce costs and wastage across the entire supply chain by getting the colour of every component right first time.

Investment in R&D excellence from quality control instrument specialist BYK-Gardner enables companies across the globe to achieve consistent measurement and control of important characteristics such as colour. And not just colour. BYK-Gardner instruments measure many other characteristics such as gloss, orange peel, multi-angled colour, sparkle, graininess, colour fastness, cloudiness, transparency, clarity and haziness.

This is achieved through industry-leading LED illuminated instruments with optimal inter-instrument agreement and enables true full digital masters to be introduced for all these characteristics. The digital masters can easily be distributed through the supply chain making a digital approval process possible at every stage, in every location from beginning to end.

Guarantee repeatable product quality across time and space
Digital masters include spectral data and client requirements, while also allowing automatic colour identification where appropriate. Measurement tolerances and an instant pass/fail can be included on both hand-held and robotic installations. The result is self-approval throughout the supply chain and improved harmony between products to guarantee a high right-first-time rate.

Working with major manufacturers across many industries, the benefits from reductions in waste and delay as well as improvements in communication of measurement data, to productivity, quality and sustainability deliver a complete return on investment – the instruments can pay for themselves!
Digital masters can be sent by e-mail as an xml file to locations anywhere in the world. They have applications within industries including automotive, coatings, plastics, printing inks leather and even wine.

Blagden distributes BYK-Gardner instruments to companies across the United Kingdom. To find out how your business can benefit from the use of these instruments in combination with digital masters, call Simon Moss at Blagden on 01959 560818 or email.

Please note: Information provided here is given in good faith and without liability. It is intended for guidance only. Users are advised to conduct their own independent examination of the product to ascertain its suitability for incorporation into processes or products. Users should ensure that the use of the product complies with all pertinent current legislation. We guarantee to supply to specification, not performance.