Bermocoll in latex paint - AkzoNobel - Performance Additives
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
Bermocoll ® in latex paint AkzoNobel – Performance Additives
2 AkzoNobel – Performance Additives
Committed to
sustainability
We’re committed to making It’s all about creating more value from fewer
resources and opening up infinite possibilities
our products and operations in a finite world.
more sustainable. As well Backed up by our commitment to Product
as driving our own success, Stewardship we believe that supplying the right
putting sustainability at the chemistry goes beyond just selling products.
heart of everything we do Our efforts have been rewarded. The ISO 9001,
ISO 14001 and OHSAS 18001 certification
means that our customers awarded for innovation, purchasing, operations,
and employees – not to marketing and distribution of Bermocoll® are
only the fi rst steps on the road to fulfi lling
mention the planet – will our ambitions - to meet customers’ request
also benefit. for competitive, environmentally sound, and
profitable products today and tomorrow.
But if we’re to take advantage of sustainable
growth opportunities, we have to accelerate the Bermocoll® is a registered trademark in many
pace of our commitment. Which is why we’ve countries.
adopted an approach we call Planet Possible.
AkzoNobel – Performance Additives 3
Experience the difference – Reliable rheology
solutions for paint and coatings
Bermocoll makes a difference
with reliable rheology
Rheology of coatings
Rheology is the science of deformation and
Bermocoll® cellulose
We at AkzoNobel have been serving the paint flow of materials. Every material is influenced ethers are manufactured
Industry around the world for more than 50 years
with our brand Bermocoll®, a range of non-ionic
by external forces.
by a unique, solvent-free
cellulose ethers. For paint, these forces can range from gravita- process, ensuring you
tional forces, which influence phenomena such
Bermocoll ® is used as a rheology modifier, as sedimentation, leveling and sagging, to the
a reliable product with
stabilizer and water retaining agent for water- very high shear forces that act on the paint a low carbon footprint.
based decorative paints. when it is brushed, rolled or sprayed. Viscosity
is a measure of a material’s resistance to flow.
Bermocoll® cellulose ethers are manufactured
by a unique, solvent-free process, ensuring our
customers a low carbon footprint. They are
available in all required viscosities and a range
of modifications to ensure we meet every
customers’ needs.
4 AkzoNobel – Performance Additives
Our Bermocoll
products
We know that a high application
viscosity is essential for good film
build and hiding power. That’s why
our Bermocoll Prime contributes
to the medium and high shear
viscosity to a much greater extent
than regular cellulose ethers.
Bermocoll® Prime
Bermocoll Prime has been developed as the ermocoll Prime within a wide range of
B
next generation of cellulose ethers. It can be colorants and latex binders. Bermocoll Prime
used in all types of latex paints ranging from is designed with particular attention to color
low to high PVC. This new product is suitable acceptance and color development and offers
for all types of interior and exterior paints and reliable color performance. (This means that
the advantages are most apparent in flat to the color appears in a uniform homogenous
semigloss finishes. manner and at the expected color strength.
Color acceptance is related to the compati
Performance advantages bility, distribution and stability of the colorant in
• Advanced color compatibility and rheology the base paint).
control to enhance touch up properties
Efficient thickening and
• Optimal rheology profile good stability at low addition rate
• Versatile Paints formulated with Bermocoll Prime show
very stable and constant viscosity even when
Superior color stability and stored at elevated temperatures and are very
excellent color development versatile with respect to compatibility with differ-
Excellent color stability is achieved with ent kinds of binders.
AkzoNobel – Performance Additives 5
Superior color stability and excellent color development
Good color Poor color
acceptance acceptance
Color acceptance, violet 3% – typical dispersing agents
dE(00)
2.0
Bermocoll Prime
Cellulosic thickener 2
Cellulosic thickener 1
1.5
1.0
0.5
0
Salt of Sodium Salt of Salt of
acrylic polymer hexametaphosphate hydrophobic copolymer carboxylic acid polymer
Flat paint formulation Optimal rheology profile
Bermocoll Prime was tested in a system known Bermocoll Prime is less shear thinning than
to be sensitive with respect to color accep- Bermocoll Standard. With a comparable viscos
tance. The tinters used were of different color ity in paint Bermocoll Prime has lower Brookfield
shades that are known to be problematic. viscosity in water solution.
A range of different dispersant were tested.
Comparable grades in paint Viscosity in water solution (Pa.s)
Viscosity water
Prime EBS Brookfield
viscosity
Prime 1000 500–900 800–1200
Prime 2500 2200–3200 3000–4000 In can
Application
viscosity
viscosity
Standard Bermocoll
Prime 3500 3000–4000 4000–6000 Bermocoll Prime
0.01 0.10 1.00 10.00 100.0 1000 10 000
Shear rate (1/s)
6 AkzoNobel – Performance Additives
It’s a matter
of spatter
Bermocoll® EHM
Performance advantages Spatter resistance
• Combines advantages of cellulose 9
ethers with rheological properties
of s ynthetic associative thickeners 0.5* 0.5* 0.48* * = Dosage
8
• Low spatter
• Good leveling 7
0.4*
• Enhanced brushing viscosity
0.35*
6
Bermocoll® EHM is a non-ionic associative
cellulose-based polymer with enhanced en- 0.3*
zymatic resistance. We developed it in order 5
to improve the rheological properties in latex
paints. 4
Bermocoll® EHM combines the performance
of low viscosity cellulose with high thickening 3
efficiency.
0.35*
2
1
0
HM-HEC 1 HM-HEC 2 EHM Extra EHM 200 EHM 300 EHM 500 Standard
CE
Below, from left to right: Spatter from:
EHM Extra EHM 200 EHM 300 EHM 500 Standard
AkzoNobel – Performance Additives 7
The Bermocoll EHM molecule contains hydrophobic groups,
which can associate with hydrophobic surfaces within the paint. Filler
Surfactant
Latex/
binder
Pigment
Bermocoll® EHM Extra
Bermocoll EHM Extra is specially developed Application (ICI) viscosity
to meet the demand for high-quality paint and ICI viscosity (P)
1.1
next generation cellulose derivatives. It main-
tains all of the advantages of existing hydro-
phobically modified products, while boosting Vinyl acrylic binder
additional properties such as higher applica- Vinyl acetate/Ethylene binder
tion (ICI) viscosity, color acceptance, reduced
color float and enhanced storage stability. 1.0
Performance advantages
• Excellent application properties for
outstanding coverage and film build
• Superior storage stability with 0.9
minimal syneresis
• Extremely good application properties,
such as spatter and sag resistance
Paint rheology, higher ICI viscosity 0.8
With equal dosage and Stormer viscosity (KU),
Bermocoll EHM Extra achieves higher ICI
viscosity than competitor products – demon-
strating the robust and reproducible thicken-
ing character of our product. The higher ICI
0.7
viscosity contributes to an improved film build Bermocoll Bermocoll HM-HEC HEC Bermocoll Bermocoll HM-HEC HEC
and thus better coverage. EHM Extra EHM 200 EHM Extra EHM 200
Hiding power
EHM Extra EHM 500 EBS 481 FQ
8 AkzoNobel – Performance Additives
Standard,
widely accepted
Bermocoll® Standard Open time
Performance advantages
CE generally versus synthetics
• Water retention - Bermocoll helps to retain
the water within the paint film and also to
delay it from penetrating into the substrate
or evaporating. This gives an increased
open time.
• Contribute to dispersion by improving flow
during grinding
• Contribute to stabilization (prevent
flocculation) of pigments
• Robust/Stable viscosity and creamy texture
• Natural renewable polymer with chief
component wood pulp or cotton linters Storage stability Bermocoll Synthetic thickener
(50° C, 2 weeks)
When choosing the viscosity type of Bermocoll
you should consider its influences on a number
of properties in the paint.
Leveling, hiding power and spatter will be
better when using medium and low viscosity
grades due to their more Newtonian character.
On the other hand the higher viscosity grades
offer improved cost efficiency and water resis-
tance because of lower addition levels.
Performance advantages
Low viscous Color floating Bermocoll Synthetic thickener
• Maximum open time/water retention (50° C, 2 weeks)
• Leveling
• High application (ICI) viscosity
Performance advantages
High viscous
• Efficiency
• Texture
• Economic
AkzoNobel – Performance Additives 9
Renewable and reliable products
for demanding situations
Bermocoll® EBM Enzyme resistance
Retained viscosity in %
100
95
High viscosity products with enhanced stabil-
ity. Suitable for paint and building applications. 90
85
Performance advantages
80
• High viscosity grades hence highly efficient
75
• Outstanding enzyme stability
70
• Especially appreciated in high PVC formula-
65
tions like joint compounds, distempers and
putties because of good compatibility with 60
fillers 55
• Low foaming with excellent storage stability 50
and color acceptance Bermocoll EBM Bermocoll Prime, EBS Biostable HEC Regular HEC MHPC
10 AkzoNobel – Performance Additives Causes and cures
AkzoNobel – Performance Additives 11
Latex paint problems related to Bermocoll
Problem Cause Cure
Manufacturing
Lump formation during dissolving of • Wrong type of Bermocoll used • Use only Bermocoll paint grades
Bermocoll • pH of water too high • Add acetic acid
• pH of solution too high • Add Bermocoll directly after adding water – then
add alkaline ingredients, e.g. pigment dispersant
Too slow dissolving • Neutral or acid water • Increase pH
• Temperature too low
Too fast dissolving • pH too high • Decrease pH
• Hard water / high pH
• Temperature too high
Foam development during grinding • Surface active products (Bermocoll, • Add the right foam suppressor before Bermocoll
surfactants, pigment dispersant) and other surface active products
Final viscosity too low • Inadequate amount of Bermocoll • Post addition of slurry of Bermocoll
or polyurethane thickener
Final viscosity too high • Incorrect amount or type of Bermocoll • Use lower addition level
• Use lower viscosity grade
Application
Spatter from roller • Too elastic thickener • Use Bermocoll low viscosity grade
or EHM grade
• Use polyurethane thickener in combination with
Bermocoll
Brush resistance too low • Low application viscosity • Use Bermocoll low viscosity grade
or EHM grade
Poor open time • Insufficient water retention • Increase Bermocoll addition level
• Add glycol
Poor hiding power • Low application viscosity • Use Bermocoll low viscosity grade
or use EHM grade
Dried film
Poor gloss •C
ellulose ethers not suitable in high gloss • Use polyurethane thickener
paths
Poor leveling • Rheological character of the paint • Use Bermocoll low viscosity grade or EHM grade
• Use polyurethane thickener in combination with
Bermocoll
Inadequate wet scrub resistance • Water sensitivity of film • Reduce surface active ingredients
Storage
Drop in viscosity • Enzymatic degradation • Use enzyme stable Bermocoll grades
• Bacterial contamination • Clean production equipment
• Change bactericide
Increase in viscosity • Insufficient amount of dispersant • Increase pigment dispersant
• Interaction Bermocoll / Latex • Use non-ionic surfactants
• Use new generation Bermocoll
Separation • Low shear viscosity too low • Increase Bermocoll addition or use
higher viscosity grade
Syneresis • Insufficient colloidal stabilization •A dd non-ionic surfactants
• Use new generation Bermocoll12 AkzoNobel – Performance Additives
Incorporating
Bermocoll
The method of choice for incorporating
cellulose ethers is yours …
Bermocoll ment grind. When added, the water should be As a stock solution
Cellulose ethers can be incorporated into neutral or slightly acid. Alkaline ingredients are Stock solutions are made by adding Bermocoll
the paint in different ways and at several added after thorough dispersion of the cellu- powder to water and stirring until the thickener
stages during the manufacturing process. We lose ether. We have seen that with this method, is dissolved. We recommend a concentration
recommend the following three main addition the dispersion power of Bermocoll is utilized of 2–5% depending on the Bermocoll type.
methods to be considered: as a dry powder during the subsequent grinding. When using a Bermocoll paint grade, the water
(“batch in one”), as a slurry, and as a stock should be neutral or slightly acid. If it is alkaline
solution. All three methods have their pros
As a slurry when adding Bermocoll paint, the thickener
and cons. Your choice of method will mainly Slurries containing up to 15–20% Bermocoll are will dissolve too quickly, forming an insoluble
be dependent upon the type of equipment and readily made by dispersing a Bermocoll paint gel instead of a solution. If you’re planning to
process you use. grade either in water or in a suitable organic store stock solutions for a prolonged length
solvent. Such slurries are g enerally u sable of time, we recommend that stock solutions
As a dry powder within half an hour after preparation. When should be protected from micro-organisms by
Bermocoll paint grades can be added as a dry working with aqueous slurries of B ermocoll using a suitable preservative.
powder directly to the batch of water in the pig- paint grades, the pH must be 7 or less.
Bermocoll paint grade, influence of pH at 20°C. Bermocoll paint grade, influence of temperature at pH 7.
Relative viscosity in % Dessolving time, minutes
100 120
100
80
pH 10
pH 8
80
pH 7
60
60
40
40
20
20
0 0
0 10 20 30 40 50 60 70 10 15 20 25 30 35 40 45
Time, minutes Temperature °CAkzoNobel – Performance Additives 13 … We will make sure you will get the high quality you deserve.
14 AkzoNobel – Performance Additives About us Performance Additives is one of the businesses within the global company AkzoNobel. We have a unique technology base and experience of cellulose derivatives, with more than 50 years of development, manufacturing and sales of these products. Today, we serve our customers in more than 80 countries.
AkzoNobel – Performance Additives 15
A dedicated unit with This benefits our customers because we sus- Bermocoll locations
multinational resources tain their future competitiveness and meet the
The combination of a multinational group’s consumers’ unspoken needs. Headquarter
large resources and a dedicated unit’s focus Sempach- Station, Switzerland
on its customers gives us a unique position. Innovation & Sustainability
Our research and product development has More value from fewer resources Research and development
always been guided by our customers and At AkzoNobel innovation starts with under- Stenungsund, Sweden
their requirements. We strive to be the most- standing what our customers need. Our com-
reliable and dedicated supplier of cellulose mitment is to do that better and quicker than Business and service centers
ethers to the water borne paint industry. our competitors. That means understanding Brewster, USA
and anticipating how our world and our cus- Singapore
Looking closer, seeing further tomers’ lives and expectations are changing. Stenungsund, Sweden
At AkzoNobel, we believe the future belongs to
those smart enough to challenge it. We believe Of course sustainability is integral to everything Production site
that real progress belongs to those who not we do at AkzoNobel. Nowhere is that more ob- Örnsköldsvik, Sweden
only think with courage, but also have the cour- vious than in our innovations. The world needs Ningbo, The Republic of China
age to deliver on the thought. What drives us is sustainable solutions. That is why most of our
knowing that what is good for our customers innovation work is driven by sustainability and
today is not necessarily good enough for them the ultimate goal is to deliver more value, with
tomorrow. What excites us is asking the un- fewer resources.
asked question. What inspires us is seeing the
opportunity others cannot. What unites us is the
intelligence to deliver where others have not.Europe/Middle East/Africa Americas Asia
Akzo Nobel Functional Chemicals AB Akzo Nobel Functional Chemicals, LLC Akzo Nobel Asia Pte Ltd
Performance Additives Performance Additives AkzoNobel House
SE-444 85 Stenungsund 281 Fields Lane, Brewster, NY 10509-2676 3 Changi Business Park Vista, #05-01
SWEDEN USA Singapore 486051
T + 46 303 85 000 T + 1 203.545.5037 T + 65 6773 8488
E bermocoll@akzonobel.com E CustomerService.CSUS@akzonobel.com
W www.akzonobel.com/pa
www.akzonobel.com
AkzoNobel is a leading global paints and
coatings company and a major producer of
specialty chemicals. Calling on centuries of
expertise, we supply industries and consumers
worldwide with innovative products and sus
tainable technologies designed to meet the
growing demands of our fast-changing planet.
Headquartered in Amsterdam, the Netherlands,
we have approximately 48,000 people in around
AN_201046_031014. CCD 0315.
80 countries, while our portfolio includes well-
known brands such as Dulux, Sikkens, Inter
national and Eka. Consistently ranked as one of
the leaders in the area of sustainability, we are
committed to making life more liveable and our
cities more human.
© 2015 Akzo Nobel N.V. All rights reserved.You can also read
