THE SOUTH AFRICAN PAINT INDUSTRY TRAINING INSTITUTE
SAPMA PAINT TECHNOLOGY COURSE
MODULE 5 - MODIFIERS

In this Module the learner studies the need for various modifiers or additives, the nature of the additives, the mechanisms by which they function.

This is a short module, requiring only 30 hours of study, and it introduces the use of assignments as a means of assessment and as a learning method.

The learning material comprises written text, divided into 9 lessons.

There are four practical exercises in this Module, and the learner is expected to plan and implement these with minimum guidance from the Counsellor. The exercises are designed to illustrate the effects of four classes of additive.

In addition, the student has to submit two assignments, in which the nature and proper- ties of a wide range of additives are listed. This familiarises the student with proprietary materials and with the use of suppliers data sheets.

WHO SHOULD STUDY THIS MODULE ?

This Module is essential for those who are following a technical career path, and in particular those in a laboratory environment.

PREREQUISITES FOR THE MODULE

Successful completion of Module 03 - Solvents and Media and Module 04 - Pigments and Dispersion.

SUMMARY OF SYLLABUS

A. DISPERSION PROCESS

Dispersion agents Defoamers Anti floating and anti flooding agents Determine the effect of various dispersants.

B. CAN STABILITY

Biocides, Anti settling agents, Anti skinning agents, Moisture absorbers, Thickening agents, Corrosion inhibitors.

C. APPLICATION

Viscosity control, Conductivity control, Anti static agents.

D. FILM POLYMERISATION

Driers to determine the effect of addition of driers.

E. FILM APPEARANCE

Special effects:- Matting, Gas checking.

F. FILM PROPERTIES

Adhesion promoters, Heat stabilisers, Optical brighteners, Lubricants, Anti scuff agents, Anti fouling agents, Biocides, Corrosion inhibitors, U V Absorbers, Slip agents.

G. OTHER MODIFIERS

Deodorants Flash point modifiers Fire and flame retarders

H. PLASTICISERS

Nature, applications and uses Determine the effect of plasticiser on several film properties

ASSESSMENTS

4 Multiple choice tests
4 Written reports on practical work
2 Assignments
1½ hour written exam at end of module

PASS MARK

A minimum of 50% in each of the three modes of assessment is required for a pass.
A merit pass is awarded for an overall mark of 80% or above, and a distinction is awarded for an overall mark of 90% and above

DURATION AND TIME INVOLVED

The Module takes 9 weeks to complete. The average learner would spend the following time on the various aspects :-
Theoretical study - 22 hours

Practical exercises 8 hours

Report writing 6 hours
This averages out to just over 5 hours per week
The work can be spread over a full semester

Back to List