Performance Additives by DELTA

specialties Abhay Mehrotra

DELTA SPECIALTIES

Having a purpose and knowing exactly what values are will add quality & additional performance in your products

Additives applied on coatings

Production/storage Application Film formation Service life

Paints Processing/storage Additives

Antifoam Additives Dispersing Agents Emulsifiers/wetting agents Antisettling Agents Biocides

Application Additives

Conductivity modifier Substrate wetting Defoamers

Additives for film formations:

Coalescing Agents Rheological Additives Surface Control Additives Driers Catalysts Film leveling Additives

Additives for Service life:

Cross –linking Agents Water-Repellant Dry Film Preservatives Mattening Agents Corrosion Inhibitors Adhesion Promoters Surface Slip Antistatic Additives Antiblocking Additives

Product Range

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DELTA-FC®

Foam Control Additives

DELTA-SC®

Surface Control Additives

DELTA-DC®

Dispersion Control Additives

MORDRY®

Driers

DELTA-S® Specialty Additives

Wetting & Dispersing Agents: Need

Dispersing is the mechanical dispersion of solid/pigments in a liquid(resin) to achieve stable colored systems .By dispersing process the agglomerates must break down to primary particles and it help to prevent reflocculation of the system

Wetting & Dispersing Agents: Advantage To improves color strength and transparency of film To improve gloss and leveling To improve color development and opacity To reduce the grinding time To improve the rheology of the coatings To improve stability of coatings To arrest floating/flooding

Wetting and Dispersing difference

Wetting and dispersing is a general term for coating industry and should not be separated during discussion of solvent borne systems• The wetting Process characterized as the removal or

displacement of air/moisture from pigments/fillers followed by encapsulation of surface with continuous systems

• The dispersing is the mechanical grinding /separation to smaller particles to stablise in resin systems and to prevent them from reflocculation

Factors affecting dispersion

Gravity Surface free energy Electrostatic repulsion Steric Stabilization

Types of Dispersion Control Additives Deflocculation Controlled flocculation

Deflocculation

Offers a low viscosity dispersion Good gloss and color strength Prevents flooding and floatation Risk of settling and sagging Suitable for Topcoats DELTA-DC® 3046, 3047, 3009, 3011,

3013, 4044, 4207, 4296, 4010M, 4242, 4007, 3590, 3591 and 3401

Controlled Flocculation No sharp viscosity decrease compared to

deflocculation mechanism Gives a special rheological behavior

(usually thixotropic) Excellent anti-settling and anti-sagging

property Prevent the risk of flooding and floatation Suitable for highly filled systems as primers DELTA-DC® 4001, 4054, 4065, 4066 and

4071

Mechanism

Electrostatic repulsion Steric Hindrance

Typical problem with poor stabilization

In the liquid paints Settling/sedimentation

of fillers, pigments, mattening agents

Viscosity Instability during storage

Foam stabilization

In the cured films Gloss reduction Haze Less Transparency Change in color Uneven orientation

Dispersant level and its effects Too little agents Only partial coverage Limited performance

I. Correct dosagesII. Minimum viscosityIII. Maximum stability

Too much additives Layer collapse Cissing

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Suitability by resin polarityRecommendation: DELTA dispersants

Polarity +

DC 4207

DC 4044

DC 4054/4007

DC 4010 M

DC 4065/DC 4066

DC 4001DC 4002

DC 3047

DC 3009/DC 3011/DC 3046

DC 4211

DC 4242

Solution for Antifloating/Anti flooding It is well known that in case of co grinding multiple

pigments ,which are different in particle size ,density ,and degree of flocculation are liable to form trouble such as gloss heterogeneous, flooding and floating during coating process

Anti flooding/Antifloating agents is usually recommended to avoid that

It may be a dispersing agents or surface control agents or used in combination

Flooding and Floating

Flooding----Horizontal separationFlooding defect where the color separation happen horizontallyFloating……Vertical separation Floating defect where color separated on the surface of the paint, vertically

Selection of Additives for Antiflooding/AntifloatingFloodingEliminating by stablising dispersion function of dispersing agentsFloatingEliminated by preventing Benard cell formation with surface control additivesSettlingEliminated by preventing settling with antisettling additives

DELTA DC 3047

Properties Composition: Polyurethane Appearance: slightly yellow liquid Solids Content : 35 % Features Excellent for FW 200 carbon black and tough

organic pigments To prevent reflocculation of pigments To improve color development ,hiding power ,gloss

and leveling and DOI

DELTA -DC® 4211 New GenerationDispersion Control Additives It is an acidic polyether-based dispersion control

( anionic) developed for high filled systems. It is suited for high filled unsaturated polyester systems, SMC, BMC, carputties, gelcoats or combination of polystyrene, polyvinylacetate, and styrene-butadiene copolymers( LS- or LP formulations)

Typical technical Data /DELTA -DC®

4211

CompositionAppearanceSpecific Gravity @ 20°CFlashpointAcid valueActive ingredients

:Acidic Polyether:Cloudy brownish liquid:ca. 1.14 g/cm3: 24°C:170-190 mg KOH/g: 90-100%

Foam Control AdditivesA foam control additive is a surface-active agent that destroys foam after it has been formed or prevents/retards the foam formation.

For a good efficiency, Foam control agent must meet the following conditions:

• Almost insoluble in the medium• Entering in the foam lamella • Spreading on the surface

For: Water Based Foam Control Solvent based/solvent free systems

Requirements of an effective Defoamer Lower surface tensions than other ingredients Partial incompatibility Highly efficient to enter foam lamella Inert Easily mix

Factors affecting foam formation

Poor wetting of substrates High Viscosity High Shear rate during processing/application High water content of raw materials High content or presence of surfactant High Humidity

Mode of Action of Defoamer

These are low surface tension liquids ,must demonstrate the following properties1. Insoluble in the medium to be defoamed2. Positive entering coefficient3. Positive spreading coefficient4. Accelerate the migration of bubbles to surface

Selection Criteria for Defoamer

Antifoaming Efficiency Defoaming Efficiency Partial compatibility with system Appearance of film Recoatability Stability

Popular Defoamers : water base systems FC 1501 FC 1503 FC 1531 FC 1522M FC 1552 FC 1525 FC 1590

Popular Defoamers : Solvent /free systems FC 1020 FC 1022 FC 1040 FC 1041 FC 1720 FC 1722

Orange peel Fish eyes Craters Pinholes Benard cells

Surface control agents SCASurface-related problems:

• Very often, surface-related defects are directly linked to the surface tension.

• Defects of wet and consequent dry coating films, affecting coating appearance and sometimes performance

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Influence and factors on leveling

Evaporation rate and solubility of solvents Leveling of primer Contamination during application Quality of raw materials and surfactant

Mechanism of leveling Additives

To improve the flow of coating like plasticizer To reduce and stabilize surface tensions To prevent formation of Benard Cell formations Leveling Additives migrates to surface due to its

incompatibility

Surface Control Additives: flow, leveling and surface propertiesTypes of Surface Control Additives Silicone based: SC 2030,SC 2033,SC 2031,SC

2211,SC 2236,SC 2239 Acrylate based: SC 2777,SC 2772,SP 10930,SP

10957

SC 2777 Star Leveling AdditiveProperties

Composition: Polyacylate flouro modifiedAppearance: ColorlessNVM: 70 % solidsCarrier: XyleneSpecific Gravity: 0.98

Features To eliminate surface

defects, craters, pinholes, fish eyes

Compatible with most binders

To be light stable, hydrolysis resistant and does not migrate from film

Improve leveling and flow of coating and can be used in high temperature system

Provide long wave leveling

SC 2033 Leveling Agent Typical Properties Composition: Polyether modified siloxanes Appearance: Colorless liquid Solid Content : 15 % Carrier : Butyl Acetate Specific gravity: 0.91 Features Highly effective substrate wetting and good anticratering Effective against cissing To reduce coefficient of friction ,improve scratch

resistance ,mar resistance and good recoat ability

Settling of pigments and fillers

The density difference between the binder and the pigments ,or the binder and the fillers

Particle size distribution, Particle size, surface charge, shape and cohesion of the pigment and fillers

Viscosity and Thixotropic of binder Affinity of the binder and the pigments ,or the binder

and the filler Degree of dispersion and types of controlled

flocculating Additives used

Typical Antisettling Additives propertiesTypes Organo clays Synthetic silicates Hydrogenated castor

oils Polyethylene wax Polyurea Surfactant

Thixotropy Strong Strong Strong Weak Weak Weak

DELTA DC 4001 Antisettling Agent

Typical Properties Composition :Salt of

unsaturated fatty acids Solvents:

Isobutanol/water Amine Value: 48 Acid Value: 37 Active Ingredients: 30 %

Application Prevent interfacial

Tensions between fillers/pigments and binders

Creates thixotropy and therefore prevent settling/saggings

Preferably used in primers/undercoat

DELTA-S® 5225

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DELTA-S® 5225 is a multifunctional additive that can be used as:

• Color acceptance improver• Sole dispersion control additive for the

manufacturing of universal colorants• To formulate environmentally friendly

colorants with no APEO raw materials and lowered or no VOC content

• MORDRY® 410& MORDRY® 420& MORDRY® 430Highly efficient replacement for cobalt drier in urethane-modified alkyds and alkyds

• DELTA-S® 5700Anti-gel agent and viscosity stabilizer for air drying and stoving coating systems

• DELTA-S® 95/97pH Buffer

• DELTA-S® 5800 Antigelling and viscosity stabilizer for WB formulations• DELTA-S® 5750 Coalescing agent for water based formulations

Specialty Additives

Performance Efficient manufacturing Defect less Finishes Effortless applications Excellent Service

DELTA best offering to the coating industry

DELTA specialtiesAl-Moustafa For Industries & DesignsSwiss Compound4th Industrial Zone6th of October CityA. Republic of EgyptTel.: +202 330 381 15Fax: +202 330 311 81E-mail: info@deltaspwll.comWeb: www.deltaspwll.com