Haryana polytechnic syllabus CHEMICAL ENGG Spl. Paint Tech 4th SemPIGMENT TECHNOLOGY

Haryana polytechnic syllabus trade CHEMICAL ENGINEERING (Spl. Paint Tech) 4TH semester and Subject PIGMENT TECHNOLOGY for the session 2012-13 and you can read the syllabus as well as download from here.

RATIONALE
Pigments are an integral part of decorative, protective and functional coatings. This subject deals with pigments belonging to different groups and the properties which they impart to various coating systems.

DETAILED CONTENTS

1. Definition and classification of pigments (organic and inorganic pigments) , properties and evaluation of pigments such as crystal structure, particle size and shape, refractive index and Hiding power, oil absorption, colour, specific gravity and bulking value, UV and IR absorption, light fastness, resistance to hot water, alkali and acid, corrosion inhibition, toxicity, reducing power, tinting strength, flooding and floating, settling, volatile and water soluble matter, residue on sieve, bleeding, Dispersability, Intensity etc. (10 hrs)

2. White pigments such as titanium dioxide, zinc oxide, zinc sulphide and lithopone basic lead carbonate, sulphate, silicate etc (08 hrs)

3 Color pigments – natural and synthetic, iron oxides, lead chromates, silico chromates, Prussian and ultramarine blue etc., Black pigments, Colour pigments such as carbon black graphite. (08 hrs)

4: Metallic pigments such as aluminum, zinc, copper alloys, stainless steel etc. anti corrosive pigments such as red lead silicon chromate, calcium plumbate etc. (08 hrs)

5: General method of preparation and classification of synthetic organic pigments, flushed pigments, Azo Pigments, diazotisation and coupling, di-and tetra azo compounds, classification, description of various types of azo pigments and other related colourants such as azoic, etc. . (11 hrs)

6: Basic and acid dye pigments, permanent and fugitive type of dyes and pigments anthene and anthraquinone and vat colour pigment, Phthalocyanin blue and green metal free phthalocyanin. Quinacridones and other related pigments, miscellaneous organic pigments such as nitro, nitroso etc. Testing and identification of organic pigments. (11 hrs)
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7: Extenders: Definition, Type of Extender (Sulphate, Carbonates & Oxides). (08 hrs)

LIST OF PRACTICALS
1. To check the form and condition of pigment
2. To test the colour of pigment
3. To compare the tinting strength of pigment
4. To compare the reducing power of pigment
5. To determine oil absorption value of pigment
6. To determine residue on sieve of pigment
7. To determine moisture content of pigment
8. To determine water soluble matter of pigment
9. To prepare sample of middle chrome pigment
10. To prepare sample of prussian blue pigment

INSTRUCTIONAL STRATEGY
Field visits should be organized to a paint industry especially to pigment mixing/tinting section so that students can appreciate the colour effect and hiding power of various pigments used in coating industry.

Author: Ramesh Saini

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