Technical information

Functional polymers

October 2006 Ultradispers W 30 ap

Polymeric dispersing agent for water based paints and inks

Dispersions BASF

Ultradispers W 30 ap Nature Polyacrylic acid, Na-salt

Properties Ultradispers W 30 is a brownish yellow coloured free flowing liquid and can be diluted with water

Product specifications

Concentration ISO 3251, (0.25g, 150 C, 2h) ca. 45 %

pH value DIN 19 268, 10 % active ca. 8

Substance in dist. water

Viscosity Brookfield LVT, ca. 1000 mPas

23 C, spindle 3, 60 rpm

Application Fields of application

Ultradispers W 30 ap is a polymeric dispersing agent. Which can be differentiated from standard dispersing agents by higher molecular weight and optimum storage stability. In addition they allow low foaming, improved pigment stability and a reduced effect of the dispersed pigment on the rheology of the finished paint or ink. Primary are of application is

Aqueous pigment paste Interior wall paint Exterior emulsion paint Distempers Water based putty

Usage The efficiency of the wetting depends primarily on the comparative surface tension properties of the pigment and the water, as well as the viscosity of the resultant mix. Ultradispers W 30 adsorb on the pigment surface, facilitate liquid/solid interfacial interactions and help to replace the air/solid interface by a liquid medium/solid interface. Stabilization is achieved by electrostatic as well as steric effect, so that repulsive forces prevent other particles from approaching close enough for the attractive Van der Waals forces to cause agglomeration.

Dispersions BASF Recommended dose is between 0.1 % to 0.4 % by weight of paint

formulation. The dispersing agent demand depends upon the quantity, shape and size of pigment and extenders. Hence it is recommended to obtain the dispersing agent requirement of a particular pigment mixture. Dispersing agent demand for a Typical pigment mixture that is used for 40 PVC paint is given below. A dose of 0.25% by weight of paint formulation is sufficient in this typical case.

Dispersing agent demand for pigment mixture

40

50

60

70

80

90

100

110

120

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45

Dosage in %

Visc

osity

in K

U

Comp. 1

Comp. 2

Ultradispers W30

Ultradispers W 30 ap can also be used in combination with non-ionic surfactants to take care of pigment flocculation. It is necessary to optimize the dispersing agent requirement, as higher dose has a adverse effect on the paint/ink performance.

Safety General Attention must be paid to the normal precautions for handling

chemicals and to the measures prescribed in the local health regulations. The work place must be well ventilated. Skin care measures should be adopted and safety goggles should be worn.

Safety Data Sheet The safety data sheet for Ultradiispers W 30 ap provides on all the known safety data.

Labeling According to data of our disposal, is not a hazardous product in the sense of the German regulations* or the EC Guidelines for classification, packaging and labeling of dangerous Substances.

Industrial Hygiene According to the experience we have gained up to now and other information at our disposal, Ultradispers W 30 ap does not pose any risk to health when it is used for the purpose for which it is intended and the principals of sound industrial practice are followed.

* Gefahrstoffverordnung

Storage Drums must be kept tightly closed and air space in the storage tanks should always be saturated with water vapour. Protect from temperatures above 80 C. The self life is 12 months

Note The information submitted in this publication is based on our current knowledge and experience. In view of the many factors that may affect processing and application, these data do not relieve processors of the responsibility of carrying out their own tests and experiments; neither do they imply any legally binding assurance of certain properties or of suitability for a specific purpose. It is the responsibility of those to whom we supply our products to ensure that any proprietary rights and existing laws and legislation are observed.

October 2006 = registered trademark of BASF Aktiengesellschaft BASF Aktiengesellschaft Performance Chemicals D-67056 Ludwigshafen

Technical informationOctober 2006

Ultradispers W 30 apPropertiesProduct specificationsApplicationFields of applicationUsageSafetyStorageNoteOctober 2006