ServVol 33 • JUNE 2009

News

PAGE - 6

SERVOCHEM JHB GOLF DAY 2009Thank you for your generosity at the Servochem/ Huntsman Tioxide, suppliers annual charity golf day – a massive R90300.00 has been raised for jcH and R30 000.00 was donated towards the Servochem / campbell educational trust for 2009.

What a day! 136 golf players from the industry, 240 guests at the dinner, R90300.00 collected, to help and provide for the normaliza-tion of abused, traumatized and homeless children from all walks of life. The venue was well prepared and I think all will agree it was a pleasure to play at Bryanston country club once again.Dedicated help works. We are now seeing these children (not all) filtering back into normal society, being accepted at University, obtaining matric certificates, doing technical courses etc.

We thank the coating and Allied industries for being a big contributor in the successes being achieved.The JOHANNESBURG children’s Home is once again extremely thankful for your support.

A percentage of the sponsorship goes to the Servochem/campbell Educational Trust; the trust is open to any pupil who has completed matric with results allowing entrance to University. The most talented pupil will be 'open' to receiving a bursary and will continue on the performance of the pupil, providing he/she passes all exams on a yearly basis, until the degree is obtained. The degree to be studied will be for the approval of the trustees. Servochem and the campbell and Sons family trust are yearly contributors to the educational trust.

I hope to report after our next charity Day in 2010 an even more successful event. Its one day of the year which I am proud to say that the coating Industry stands above others in their unity.

A big thanks to the ladies who worked many long hours in organizing a well run, entertaining occasion. See you next year!

ISO 9001-2000OUR NEXT ISO AUDIT WILL TAKE PLACE ON 14TH OF JULY 2009

SERVOCHEM NATAL GOLF DAY 2009Servochem Natal and Huntsman Trioxide held their annual charity golf day at Beachwood this year and all money raised was donated to the Umthombo Street Shelter.

Kobus Kruger joined Servochem as a systems manager on 4th May 2009. Kobus will look

after HR and will be based in cape Town. Kobus will report to Andre du Plessis.

When looking at a powdered pigment sample, what one sees are the ag-glomerations of primary pigment particles and not the individual pigment crystals that make up the agglomerate. This is because of the limited magnification the human eye is capable of, and the use of light as a view-ing medium. We are stuck with our eyes as they have evolved, and their need for light to function and so are limited in what we can see unaided.

In order to see smaller objects, such as individual pigment crystals, our eyes need help and so the microscope was invented. Light is still the medium for viewing the sample, but now a series of lenses allow for much higher magnifications to be attained. Magnifications of up to about 500X are possible. The invention of the microscope opened up whole new worlds to see and study, as did the telescope in the field of astronomy.

In order to increase the magnification further and thus see even smaller objects, the wavelength of light becomes the limiting factor; radiation of a much shorter wavelength is required. The theory of quantum mechanics tells us that a particle is also electromagnetic radiation. So the electron, which is a very small particle, can also be treated as elec-tromagnetic radiation with a very short wavelength. This fact is exploited in the electron microscope in order to see particles as small as individual atoms. Such microscopes are extremely big and expensive installations. There is, however, a new generation of economical, bench top scanning electron microscopes (SEM) that bridge the gap between the limits of the optical microscope and the cost (and performance) of a full-blown elec-tron microscope. With magnifications of between 20X and 20 000X they are ideal for viewing pigment crystals, fillers, paint surfaces, defects etc. with extremely high resolution.

Pigment viewed by the eye in daylight

SEM Micrograph of Kaolin

SEM Micrograph of a pin hole in a paint film

A typical SEM installation

A new low power bench top SEMPAGE - 8

CDP

Gra

phic

s

Kobus Kruger

Lynne Rajah joined Servochem jhb as shipping & purchasing controller on 4th of May 2009. Lynne will work with Angie Ellis & Noeleen arthur in the

shipping department and will report to Sheron coetzee.

Lynne Rajah

RESIGNATIONS

Elschke Slabbert – creditors Dept, resigned 1

March 2009. Elschke relocated to Durban. We wish her every-

thing of the best.

DEATHSOur sincerest condolences go to Reinette Steyn and family on the loss of their dad who passed away peacefully on

30th of March 2009.

THE FOLLOWING STAFF HAVE HAD THEIR BIG “0” BIRTHDAY’S

Arthur Mbalo – 50 years – 4th April 1959 Happy Birthday Arthur. May you

have many more birthdays.

NEW STAFF AT SERVOCHEM JHB

WE WELCOME AND WISH THE FOLLOWING NEW STAFF MEMBERS EVERYTHING OF THE BEST IN THEIR NEW JOBS.The Dow Advanced Materials Division New Germany plant, which regards Black Economic Empowerment (BEE) as one of the vital

supporting pillars of South Africa’s transformation process, has been rated by Empowerdex as a level 6 BEE contributor.

“We are proud of this rating because, unlike many multinational organisations in this country that score zero when it comes to company ownership, this scorecard verification confirms the local operation’s commitment to supporting the Government’s economic growth strategy,” says Khumbulani Vezi, HR manager, Dow Advanced Materials Division New Germany plant. “This level 6 rating means our customers can recognise 60% of their spend with the company towards their own preferential procurement on their scorecard. With a level 4 rating, which Dow hopes to obtain by 2012, the New Germany plant will have a 100% B-BBEEE procurement recognition level.

“Although a large percentage of our suppliers have a good BEE rating, we continue to identify non-BEE compliant suppliers and encour-age them to apply empowerment codes, with no compromise to our own standards. The company stimulates job creation by procuring goods and services from BEE enterprises, particularly within the community near the New Germany plant.

A formal employment equity and training committee is responsible for implementing training initiatives from within the organisation.

The Dow Advanced Materials Division New Germany plant supplies coatings raw materials, surface finishes, adhesives and sealants, ion exchange resins, as well as consumer and industrial speciality products to diverse industries throughout Southern Africa.

dow-advanced-materials-division-bee-update-2009…two

About DowWith sales of $58-billion in 2008 and 46,000 employees worldwide, Dow is a diversified chemical company that combines the power of science and technology with the "Human Element” to constantly improve what is essential to human progress. The company delivers a broad range of products and services to customers in around 160 countries, connecting chemistry and innovation with the principles of sustainability to help provide everything from fresh water, food and pharmaceuticals to paints, packaging and personal care products.

On April 1, 2009, Dow acquired Rohm and Haas company, a global specialty materials company with sales of $10 billion in 2008 and 15,000 employees worldwide.

References to “Dow” or the “company” mean The Dow chemical company and its consolidated subsidiaries unless otherwise expressly noted.

More information about Dow can be found at www.dow.com

RELEASED BY Lindy Morton Festivitas Telephone and fax (031) 502 2374 or 083 268 6666 FOR FURTHER INFORMATION Khumbulani Vezi, HR Manager, Dow Advanced Materials Division New Germany Plant PO Box 2434, New Germany, 3620

Email: KVezi@rohmhaas.com Web: www.rohmhaas.com May 2009

PAGE - 7

ANNIVERSARIESFreddy Maringa – 15 years – start date – February 1994Anna Mphahlele – 15 years – start date – june 1994Toascer Malusela – 5 years – start date - jan 2004Dennis Mokau – 5 years – jan 2004Lazarus Thobejane – 5 years – start date – jan 2004Ian Campbell – 5 years – start date – May 2004

Servochem cape welcomes Simone Pieterse who joins us as our

receptionist and admin assistant. We wish her a long and happy

career with Servochem.

NEW CAPE TOWN STAFF

Simone Pieterse

SERVOCHEM DURBAN

IAN NICHOLSON WISHES REG HODDINOTT A LONG AND HAPPY RETIREMENT ONBEHALF OF EVERYONE AT SERVOCHEM. REG WILL BE WORKING AS A CONSULTANT FOR SERVOCHEM NATAL TO MANAGE OUR ISO REqUIREMENTS AND ASSIST WITH SITE HEALTH AND SAFETY.

Ian Nicholson & Reg Hoddinott

Back L - R Property Shasha - 10 yearsSimon Bhenghu - 15 yearscookie Govender - 15 yearsLlewellyn Mbele - 5 years

Front L- R Bheki Shezi - 5 yearsIsaac Majola - 5 years

SERVOCHEM DURBAN WAS VERY PLEASED TO GIVE LONG

SERVICE AWARDS TO:

SERVOCHEM NEWS:

• 2 Grace Davison • • 5 Cray Valley & Philip Green • 5 Rohm and Haas Golf Day • 6 Team News

SEEING PIGMENT PARTICLES

ROHM AND HAAS GOLF DAY

As the REACH legislation progresses, Grace Davison will in-

form you of its further steps in that direction and how you can

best participate from our activities and services in this field.

One Step Further - How Grace Davison can

help you with your product registration

If the product you are producing contains Grace Davison

Silica Gels, Precipitated Silica, Molecular Sieves or Colloidal

Silicas and creates a new chemical substance in total or

partly, this substance will also need to comply with the

REACH legislation and will need to be registered. Down-

stream products are often compounded products such

as lacquers, polymer masterbatches, catalyst carriers or

binders. For compounded products, exposure scenarios

will need to be provided for each raw material within the

product with respect to industrial users, commercial users

and/or consumers in order to register such products with

the European Chemical Agency. Grace Davison will be

happy to assist you in the development of such exposure

scenarios for the Grace Davison additives within your

product, once the final REACH regulation is approved.

Further questions?

If you require further information regarding REACH, you can

register for our cost-free REACH Newsletter, which will be

issued on an infrequent basis to up-date you on the latest

developments in REACH legislation and our way to approach

REACH. Please contact your local sales representative.

GRACE®, GRACE DAVISON®, DAVISON®, DARACLAR®, DURAFILL®, ELFADENT®, LUDOX®, PERKASIL®, PHONOSORB®, SAFETYSORB®, SHIELDEX®, SYLOBEAD®,SYLOBLANC®, SYLOBLOC®, SYLODENT®, SYLOID®, SYLOJET®, SYLOSIV®, SYLOWHITE™, SYLOX®, and TRISYL® are trademarks, registered in the United Statesand/or other countries, of W. R. Grace & Co.-Conn. This trademark list has been compiled using available published information as of the publication date of this brochureand may not accurately reflect current trademark ownership. © Copyright 2007 W. R. Grace & Co.-Conn. All rights reserved.

The information presented herein is derived from our testing and experience. It is offered, free of charge, for your consideration, investigation and verification. Sinceoperating conditions vary significantly, and since they are not under our control, we disclaim any and all warranties on the results which might be obtained from the useof our products. You should make no assumption that all safety or environmental protection measures are indicated or that other measures may not be required.

Printed in Germany / April ‘08, Supersedes October `06, Ref: reach_ti /

www.grace.comCorporate Headquarters

W. R. Grace & Co.-Conn., 7500 Grace Drive, Columbia, Maryland 21044/USATel.: +1 4105314000, Fax: +1 4105314273

Regional Headquarters

W. R. Grace (Hong Kong) Ltd., 19th Floor, K. Wah Center, 1010 Huai Hai Zhong Road , Shanghai 200031, ChinaTel.: +86 2154674678, Fax: +86 2154051500

Grace Brazil Ltda., Rua Albion, 229-10 Andor CJ101, Lapa - São Paulo - SP/Brasil, 05077-130Tel.: +55 113649-2704, Fax: +55 113649-2706

Grace GmbH & Co. KG, In der Hollerhecke 1, 67545 Worms/GermanyTel.: +49 624140300, Fax: +49 62414031211

Molecular Sieve Spheroidal SilicaSilica Gel Sodium Aluminum Silicate Colloidal SilicaPrecipitated Silica

GRACE DavisonMaterials & Packaging Technologies Technical Information

Our Products within REACHSilica Gel / Precipitated Silica / Zeolite Molecular Sieve / Colloidal Silica

A Promise of SustainabilityAt Grace Davison, we support REACH´s underlying objec-

tive of minimizing the health and environmental risks of

chemical substances and the development of ever-safer

technologies, despite the bureaucratic efforts related to

the new registration process and regulatory framework.

Grace Davison has been actively engaged since many

years to collect and develop the necessary product data

for a smooth REACH registration of its silica and silica-

alumina products such as SYLOID® matting agents,

SHIELDEX® anticorrosion piments, DARACLAR® and

TriSyl® purification agents, SYLODENT®/SYLOBLANC®/

ELFADENT® toothpaste cleaning silicas, SYLOID® FP

additives, SYLOX® free-flow agents, SYLOBLOC® anti-

blocking agents, PERKASIL® rubber additives, SYLOJET®

ink receptive silicas, SYLOWHITE™ TiO2 extenders and

DURAFILL® paper additives, PHONOSORB® desiccants,

SYLOBEAD® adsorbents, SYLOSIV® moisture scavengers,

SAFETYSORB® drying agents, and LUDOX® colloidal

silicas. Therefore we are well prepared for the up-coming

legislation.

Choosing Grace Davison products, you will not face the

risk that your key raw materials will all of a sudden not be

available anymore, and thus avoid time consuming re-

qualification and re-formulation efforts in your operation

under high time pressure.

Using Grace Davison Products under REACH

Down stream users of chemicals not only need to ensure

that their raw materials are correctly registered and autho-

rized in case of certain hazardous properties, but also need

to ensure that their way of using such raw materials is

listed as safe application. This will be done via exposure

scenarios, which describe how the user of such chemicals

will be exposed to the chemical during the product life cycle.

In the course of registration of our products, Grace

Davison will also develop, if legally required by REACH,

exposure scenarios for common usages of our products

to relieve customers in our key application areas from

generating their own data and registration.

The European Union has approved a new regulatory system for chemical management called REACH (Registration,

Evaluation, and Authorization of Chemicals). REACH came into force on June 1st, 2007 with a transition period of

12 months until it will become directly valid in all EU member countries, with the objective to guarantee the safe use

of chemicals within the European Union thus protecting the human health and environment.

Within REACH, all chemicals manufactured/imported in quantities above one tonne per year need to be registered by a

substance dossier. This registration is company-specific, not material-specific. Subtances such as Silica Gel, Precipitated

Silica and Zeolite are subject to REACH registration with a pre-registration phase ending on December 1st, 2008, while

final registration – submission of required data including robust study reports, classification and labeling suggestions to

the European Chemical Agency – will need to be completed by mid 2012. Only the use of silica gels, precipitated silica,

colloidal silicas or zeolites from suppliers or importing companies, registered by them, will be allowed from 2012 onwards,

and downstream users will need to qualify replacement materials or material types by that date.

PAGE - 4PAGE - 2

Liquid VOC-free Rheology Additive to Control High Shear Viscosity in Water-borne Coatings

Modern water-borne paints mostly comply with recent environmental requirements but demand extensive rheology controlling techniques to provide the same perfect applica-tion properties typical of traditional solvent-borne alkyd paints. To get the same brushability, spatter resistance and smooth leveling these water-borne systems need adjust-ment by a high shear thickener. However, normal application methods involve both low and high shear stresses; usually, a combination of a high and a low shear thickener are used to create an optimum rheology behavior. BYK-428 meets both challenges: it is an easy-to-use, liquid high shear thickener that generates Newtonian flow behavior, while simultaneously, BYK-428 ideally complements many low shear thickeners for water-borne systems.

Your benefits• newtonian flow behavior• perfect brushability and leveling• extremely high spatter resistance• excellent color acceptance and rub-out stability• no negative influence on gloss• no VOC or APEO

PAGE - 5

As the REACH legislation progresses, Grace Davison will in-

form you of its further steps in that direction and how you can

best participate from our activities and services in this field.

One Step Further - How Grace Davison can

help you with your product registration

If the product you are producing contains Grace Davison

Silica Gels, Precipitated Silica, Molecular Sieves or Colloidal

Silicas and creates a new chemical substance in total or

partly, this substance will also need to comply with the

REACH legislation and will need to be registered. Down-

stream products are often compounded products such

as lacquers, polymer masterbatches, catalyst carriers or

binders. For compounded products, exposure scenarios

will need to be provided for each raw material within the

product with respect to industrial users, commercial users

and/or consumers in order to register such products with

the European Chemical Agency. Grace Davison will be

happy to assist you in the development of such exposure

scenarios for the Grace Davison additives within your

product, once the final REACH regulation is approved.

Further questions?

If you require further information regarding REACH, you can

register for our cost-free REACH Newsletter, which will be

issued on an infrequent basis to up-date you on the latest

developments in REACH legislation and our way to approach

REACH. Please contact your local sales representative.

GRACE®, GRACE DAVISON®, DAVISON®, DARACLAR®, DURAFILL®, ELFADENT®, LUDOX®, PERKASIL®, PHONOSORB®, SAFETYSORB®, SHIELDEX®, SYLOBEAD®,SYLOBLANC®, SYLOBLOC®, SYLODENT®, SYLOID®, SYLOJET®, SYLOSIV®, SYLOWHITE™, SYLOX®, and TRISYL® are trademarks, registered in the United Statesand/or other countries, of W. R. Grace & Co.-Conn. This trademark list has been compiled using available published information as of the publication date of this brochureand may not accurately reflect current trademark ownership. © Copyright 2007 W. R. Grace & Co.-Conn. All rights reserved.

The information presented herein is derived from our testing and experience. It is offered, free of charge, for your consideration, investigation and verification. Sinceoperating conditions vary significantly, and since they are not under our control, we disclaim any and all warranties on the results which might be obtained from the useof our products. You should make no assumption that all safety or environmental protection measures are indicated or that other measures may not be required.

Printed in Germany / April ‘08, Supersedes October `06, Ref: reach_ti /

www.grace.comCorporate Headquarters

W. R. Grace & Co.-Conn., 7500 Grace Drive, Columbia, Maryland 21044/USATel.: +1 4105314000, Fax: +1 4105314273

Regional Headquarters

W. R. Grace (Hong Kong) Ltd., 19th Floor, K. Wah Center, 1010 Huai Hai Zhong Road , Shanghai 200031, ChinaTel.: +86 2154674678, Fax: +86 2154051500

Grace Brazil Ltda., Rua Albion, 229-10 Andor CJ101, Lapa - São Paulo - SP/Brasil, 05077-130Tel.: +55 113649-2704, Fax: +55 113649-2706

Grace GmbH & Co. KG, In der Hollerhecke 1, 67545 Worms/GermanyTel.: +49 624140300, Fax: +49 62414031211

Molecular Sieve Spheroidal SilicaSilica Gel Sodium Aluminum Silicate Colloidal SilicaPrecipitated Silica

Meeting your needs through Innovation CRAY VALLEY possesses national and international resources that focus ondevelopment of resins and applications. Internationally this includes 350 research and development specialists and a network of laboratories at the various CRAY VALLEY sites around the world, including specialist centres in France, Spain and USA.

The South African Coatings Team actively addresses the product needs thatare specific to our market. The current economic climate of lower demand and the resulting need for lower costs have ensured that focus on cost effective options remain a higher priority.

Some of the projects in the feasibility/implementation stage are:

lower cost Alkyd resin, lower cost Hydroxyl-functional Acrylic resin and cost effective Thixotropic resin XSA 0166.

Meet the CRAY VALLEY South Africa Coatings Team

Left to Right: Suhren RAGHUNANAN (Coatings Technical Manager), Denzil MOHANLAL (Sales and Marketing Manager), Londiwe MGWABA (CoatingsTechnologist), Shaun RASSOOL (Coatings Technologist), Amal RAMESSUR(Coatings Technical Support Manager), Jag KALYAN (Director/CoatingsBusiness Manager).

For more information on these projects please contact CRAY VALLEY or yourServochem representative.

control High shear thickener Thickener combination Low shear thickener figure 1

figure 2

0.15% a.s. Low Shear Thickener

+ 0.5% a.s. BYK-428

+ 0.5% a.s. competitor 1

+ 0.5% a.s. competitor 2

+ 0.5% a.s. competitor 3

COMMON qUESTIONS:HOW DO I PREVENT PHASE SEPARATION ON STORAGE? One situation that most paint manufacturers face at one time or another is manufacturing a batch of product and discovering that when it goes into the field, after being stored for some time, the product has separated into 2 or 3 distinct layers. Phase separation occurs from many causes, and to different degrees but the following are main types and causes:

1. Syneresis A watery clear layer forms on the surface of the stored paint. Although this can occur with both water and solvent based paints, syneresis tends to occur more in water based products, where a mixture of different thickener types have been used to obtain optimum rheology and normally indicates that is slight incompatibility occurring. The phase separation normally occurs within the first week after manufacture (some times within 24 hours).

From experience this type of phase separation is oc-curring more often as more people switch to HASE and HEUR type thickeners to improve rheology. We normally reduce or remove the synersis by the use of ultra low shear rheology modifiers like Attapugalite (E.g. Min-u-gel 400) which “freeze” the incompatible components in place. Normally the addition level is very low (2-5g/l) and has no adverse effect on other properties or cost.

2. Soft settlingHere most of the pigments and extenders in the batch have settled to give a clear layer on the top but the pigments and extenders are easy to stir in. Although soft settling can occur in both water and solvent based products it tends to occur more in alkyd based filled products like under coats and primers. Normally to solve this problem we look to the dispersing and anti settling system –normally changing or upping the wetting system or including anti settling additives such as Bestgel HV 4000, crayvallac Super/MT or Byk 410/11/31 etc-which normally also have added benefit of improving sag resistance. However too high levels of such additives normally result in poor flow and leveling and so should be avoided

3. Hard settling or biscuitingAlthough this can be considered as being a worse ver-sion of 2 above, it is in fact a far more serious problem and tends to be very formulation and extender specific. Talcs, when used in high levels in primers and undercoats are infamous for biscuiting and normally if it occurs the formulation has to be totally overhauled with specific emphasis being placed on the extender types and levels as well the dispersing and anti-settling system employed 4. Total phase separation Where it is almost impossible to achieve a storage stable system. In my experience this only really occurs in low volume solids, ultra high PVc water based systems, where the latex is so diluted with water and filler that the emulsion actually breaks and total instability occurs. In such cases there is very little that can be done to save such a batch and the formulator must go to back to the drawing board.

For further information or advice contact the Author or your local Servochem representative.

Philip GreenPaint Technology Consultant

PAGE - 3