the world leader in cashew nutshell liquid technology fast curing anticorrosion primers for steel...

The World Leader in Cashew Nutshell Liquid Technology

Fast Curing Anticorrosion

Primers For Steel Protection

Dr Jean-Luc Dallons – Cardolite CorporationPresented at a meeting of the Thermoset Resin Formulators Association

at the Hyatt Regency Montreal, September 11 through 12, 2006


Content Introduction Technology

Anticorrosion Fast and Low Temperature Curing

Surface Tolerance Overcoating

Low VOC Conclusions


Steel is the ideal material for building structuresbut it has a major drawback :

It rusts


Technology

Approvals : ISO 12944 (Anti-corrosion) ISO 20340 (Offshore)

Epoxy 2K medium coat100-150 µm

Epoxy 2K Zn rich50-80 µm

PU 2K top coat50-80 µm


Industry Needs

Provide guarantee (anticorrosion) Fast Curing Low Temperature Curing (all year) Surface Tolerance Overcoat Window Low VOC


Anacardic acid

Cardanol

Cardol

2-methyl cardol

CNSL Composition


Process

Cardanol

Phenalkamines

CNSL

Cardanol

Phenalkamines

CNSL

Cardanol

PhenalkaminesPhenalkamines

CNSL


Reactivity Enhancement

Adhesion

AnticorrosionFlexibility

Chemical Resistance

Cardanol Properties


Germany (Emssperwerk)

Phenalkamines, a Proven Technology



China – Tsing Ma Bridge


Germany – Soccer Stadium



Germany - Windmills



Thailand – Rama III Bridge (Bangkok)



Anti-Corrosion PropertiesP

hena

lkam

ine

Pol

yam

ide


Anti-Corrosion Properties

Phenalkamine non-chromate

Conventional non-chromate

Conventional zinc-chromate


Curing Properties

0

10

20

30

40

50

60

Solid Epoxy Semi-Solid Epoxy Liquid Epoxy

Cu

rin

g (

ho

ur)

0

1

2

3

4

5

6

7

8

9

Po

t lif

e (h

ou

r)

Curing 25°C Curing 5°C Curing -5°C Pot Life 25°C


Comparison with Conventional Curing Agent

0

10

20

30

40

50

60

70

80

20°C 0°C

Cu

rin

g (

ho

ur)

Phenalkamine PAAad

With Liquid Epoxy


Surface Tolerant (humid substrate)

Rusted panels, half wet

Coating (200 µm)

Adhesion after 4months


Overcoat Properties

Primer : solid epoxy - Top coat : Acrylic UrethanePrimer exposed 180 days outside

Top-coated after exposure

Polyamide Phenalkamine


Low VOC

100

150

200

250

300

350

400

450

Solid Epoxy Semi-Solid Epoxy Liquid Epoxy

VO

C (

g/l)

'Commercial Product New Product

750

750

750

500

5001100

Viscosity (cps)


Fast Curing Hardeners for Protective Coatings

Commercial ProductMedium Solid

New ProductHigh Solid

FutureSolvent Free

Commercial Development Future


Conclusions

Outstanding anti-corrosionFast and low temperature curing

Surface toleranceOvercoat Window

Low VOC

the world leader in cashew nutshell liquid technology fast curing anticorrosion primers for steel...

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