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“Invent a New India Using Knowledge”

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“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 5666 (1970): Etch (Pretreatment) Primer [CHD 20: Paints,Varnishes and Related Products]

IS : 5666 - 1970 ( Reaffirmed 2009 )

Indian Standard SPECIFICATION FOR

ETCH (PRETREATMENT) PRIMER ( Second Reprint JUNE 1990 )

UDC 667.638.2

© Copyright 1970

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr 2 September 1970

AMENDMENT NO. 1 SEPTEMBER 1989 TO

IS : 5666 - 1970 SPECIFICATION FOR ETCH ( PRETREATMENT ) PRIMER

( First cover, pages 1, 3 and clause 1.1 ) — Delete the word '( Pretreat-ment )'.

( CDC 8 )

Reprography Unit, BIS, New Delhi, India

IS : 5666 - 1970

Paints and Allied Products Sectional Committee, CDC 8

Villa Tamarinka,

Vice-Chairman

SHRI T. K. S. MANI

Members

Chairman

SHRI W. E. NORRIS

Capmarti, Jevea, Alicante, Spain

Representing

Addisons Paints & Chemicals Ltd, Madras

SHRI M. B. SATYANARAYANA ( Alternate to Shri T. K. S. Mani )

DR P. K. BHANDARI SHRI S. K. BOSE

SHRI K. C. SEAL ( Alternate )

SHRI K. N. CHOWDHRI SHRI S. K. MAITRA ( Alternate )

SHRI N. GOPALKRISHNAN

Shalimar Paints Ltd, Calcutta National Test House, Calcutta

Ministry of Defence ( DGI )

Indian Aluminium Co Ltd, Calcutta SHRI A. K. CAPRIHAN ( Alternate )

SHRI ISHWAR SINGH

JOINT DIRECTOR (M & C) The Hyderabad Allwyn Metal Works Ltd, Hyderabad Railway Board ( Ministry of Railways )

SHRI A. RAMAMURTHY ( Alternate ) DR G. W. KAPSE

DR S. M. SINGH ( Alternate ) SHRI R. K. MARPHATIA

Central Building Research Institute ( CSIR ), Roorkee

Goodlass Nerolac Paints Ltd, Bombay SHRI N. R. KOLWALKAR ( Alternate )

SHRI M. N. RAO SHRI B. V. DALAL ( Alternate )

SHRI R. K. ROKADE

Indian Paint Association, Calcutta

The Premier Automobiles Ltd, Bombay SHRI P. K. DESHPANDE ( Alternate )

SHRI G. S. SAVKAR SCIENTIFIC ADVISER TO THE CHIEF

OF THE NAVAL STAFF SHRI N. K. SEN

SHRI P. R. MALHAN ( Alternate ) SHRI K. N. R. SHARMA SHRI A. SINHA

Director General of Supplies & Disposals, New Delhi Naval Headquarters

Development Commissioner, Small Scale Industries

Directorate General of Technical Development Indian Paint Research Association, Calcutta

SHRI N. B. SENGUPTA ( Alternate ) DR M. A. SIVASAMBAN SUPERINTENDING SURVEYOR OF

WORKS ( I )

Regional Research Laboratory ( CSIR ), Hyderabad Central Public Works Department, New Delhi

SURVEYOR OF WORKS ( I ) (Alternate)

( Continued on page 2 )

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Indian Standard SPECIFICATION FOR

ETCH ( PRETREATMENT ) PRIMER

IS : 5666 - 1970

( Continued from page 1 )

Members Representing

SHRI Y. S. SWAMY I.C.I. ( Ind ia ) Private Ltd, Calcutta SHRI H. J. MISTRY ( Alternate )

SHRI D. DAS GUPTA, Director General, ISI ( Ex-officio Member ) Director ( Chem )

Secretary

SHRI S. ARAVAMUDHAN

Assistant Director ( Chem ), ISI

Panel for Air-Craft Finishes, CDC 8 : 6 : 1 0

Convener

SHRI M. K. THOMAS

Members

Hindustan Aeronautics Ltd, Bangalore

SHRI S. V. NAGARAJ ( Alternate to Shri M. K. Thomas )

SHRI K. B. GANESAN Directorate General of Civil Aviation, New Delhi SHRI M. B. SATYANARAYANA Addisons Paints & Chemicals Ltd, Madras SHRI P. B. SHAH Asian Paints ( India ) Pvt Ltd, Bombay SHRI S. SRINIVASAN Hindustan Aeronautics Ltd, Hyderabad

SHRI A. NAGARAJA RAO ( Alternate )

2

IS : 5666 - 1970

Indian Standard SPECIFICATION FOR

ETCH (PRETREATMENT) PRIMER

0. FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 30 April 1970, after the draft finalized by the Paints and Allied Products Sectional Committee had been approved by the Chemical Division Council.

0.2 The etch primers have come to play an important part in the finishing of metallic surfaces other than steel and with advantage be used in refinishing work on steel surfaces too. The use of these primers combine a light phosphate treatment with a very thin primer application.

0.2.1 The etch primers are based on the use of an activated phosphoric acid solution in conjunction with vinyl butyral resin, pigmented with zinc tetroxy chromate.

0.2.2 As the etch primer gives a very thin coating, it shall be supple­mented by a coat of ordinary priming material if full weather resistance is required. The etch primer is water sensitive, and, therefore, it is essential that the work should flow steadily from priming to finishing without delay. The etch primers are also known as wash primers or pretreatment primers. This primer is generally used in aeronautical and shipbuilding industry for the preparation of surface for painting.

0.3 Full alignment of JSS 3007 'Specification for paint, priming, etching, base/accelerator ' , issued by the Department of Standardization, Ministry of Defence, Government of India, has also been achieved with this Indian Standard as it fully covers the requirements prescribed in JSS 3007.

0.4 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

*Rules for rounding off numerical values ( revised ).

3

IS : 5666 - 1970

1. SCOPE 1.1 This standard prescribes the requirements and the methods of sampling and test for etch ( pretreatment ) primer, suitable for air drying, or force drying, for use on clean metal surfaces of all types as a treatment prior to application of the coating system.

1.1.1 The material is intended to improve adhesion of the next applied coat of paint. Though it possesses corrosion inhibiting properties, it is not intended as a permanent protective coating by itself.

NOTE — The material is supplied as two separate components consisting of the base and accelerator to be mixed together before use in the proportions specified. The mixed material should retain its properties for a period of 8 hours from the time of mixing, and any unused material should be discarded at the end of this period.

2. TERMINOLOGY 2.1 For the purpose of this standard, definitions given under 2 of IS : 101-1964* and IS : 1303-1963† shall apply.

3. REQUIREMENTS 3.1 Composition — The material shall consist of a base and an accele­rator. The two components shall be manufactured with the following ingredients mixed in the proportions by weight as given in 3.1.1 to 3.1.3.

3.1.1 Base

a) Polyvinyl butyral resin b) Zinc chrome ( conforming to

Type 3 of IS : 51-1966‡ ) c) Asbestine ( conforming to IS :

66-1950§ ) d) Ethyl methyl ketone e) Isopropyl alcohol ( conforming to

IS : 2631-1964|| ) or ordinary denatured spirit ( conforming to IS : 324-1959¶ )

f) Water g) Anti-settling agent, Max

Percent by Weight 13.0 ± 0.5 12.0 ± 0.5

2.0 ± 0.5

36.0 ± 0.5 33.5 ± 0.5

3.0 ± 0.5 0.5

100.0

*Methods of test for ready mixed paints and enamels ( second revision ). †Glossary of terms relating to paints ( revised ). ‡Specification for zinc chrome for paints ( second revision ). §Specification for asbestine for paints. ||Specification for isopropyl alcohol. ¶Specification for ordinary denatured spirit ( revised ).

4

IS : 5666 - 1970

3.1.2 Accelerator

a) Orthophosphoric acid ( conform­ing to IS : 798-1968* )

b) n-butanol ( conforming to IS : 361-1962† )

c) Isopropyl alcohol ( conforming to IS : 2631 -1964‡ ) or ordinary denatured spirit ( conforming to IS : 324-1959§ )

d) Water, Max

Percent by Weight

7.5 ± 0.5

84.0 ± 0.5

7.5 ± 0.5

1.0

100.0

3.1.3 The polyvinyl butyral resin shall be of good commercial grade containing only polyvinyl butyral, polyvinyl alcohol, and polyvinyl acetate in the molecule. The loss on heating to constant weight at 98° to 100°C shall not exceed 3 percent. Five grams of the resin dissolved in 95 g of ordinary denatured spirit shall give a clear water white solution; the viscosity of the solution shall be 20 to 25 cS at 25° C.

3.2 The material, suitable for spraying brushing, shall be prepared by mixing the base and the accelerator components in equal proportions by volume.

3.3 Consistency

3.3.1 The base shall be in such a condition that stirring easily produces a smooth uniform material with no tendency to gel or the pigment settle­ment shall not be so great that it is not possible to resuspend it by thorough stirring or to form objectionable skinning.

3.3.2 Mixed Material — When the thoroughly stirred base and the accelerator components are mixed in the proportions set out in 3.2 above, the resulting paint, after thorough stirring, shall be smooth and uniform and suitable for application by the appropriate method.

3.4 Viscosity — The viscosity of the mixed material shall be within ± 10 seconds of the approved sample when tested as prescribed in 7.4 of IS : 101-1964||.

*Specification for orthophosphoric acid ( first revision ).

†Specification for n-butyl alcohol, technical ( revised ).

‡Specification for isopropyl alcohol.

§Specification for ordinary denatured spirit ( revised ).

||Methods of test for ready mixed paints and enamels ( second revision ).

5

IS : 5666 - 1970

3.5 Drying Time

3.5.1 Air Drying 3.5.1.1 Preparation of panel — Clean a 300 × 100 × 0.8 mm unburnished,

hard, aluminium panel ( see IS : 2676-1964* ) with mineral hydrocarbon solvents and apply a coat of the material by appropriate method and allow the panel to dry at laboratory drying conditions in a vertical position. The dry film weight of the material shall be 6.5 to 13.0 g/m2. When thus dried for one hour, the panel shall show no signs of sagging, pinholing or any other defect.

3.5.2 Force Drying — The paint film prepared on an aluminium panel prepared as in 3.5.1.1 shall be force dried for 15 minutes at 85° to 100°C and allowed to cool to room temperature for one hour. The film shall show no signs of sagging, pinholing or any other defect.

3.6 Finish — The finish of the film prepared as in 3.5.1 and 3.5.2 shall be smooth and matt and not inferior to the approved sample when tested as prescribed in 7.5 of IS : 101-1964†.

3.7 Fineness of Dispersion — The fineness of dispersion of pigments in the vehicle system shall not be inferior to the approved sample when tested as prescribed in 7.6 of IS : 101-1964†.

3.8 Fitness to Take a Coat of Primer, Cellulose Finish — The paint film as prepared in 3.5 shall be able to take an overcoat of primers conforming to IS : 104-1962‡, IS : 1874-1962§, IS : 2074-1962|| and IS : 2075-1962¶ and cellulose finishes after a period of 4 to 6 hours without lifting, wrinkling or blistering.

3.9 Keeping Quality — The individual components shall be such that if stored in their original sealed containers under normal temperature conditions, they will retain the properties described in this specification for a period of not less than six months.

4. PACKING AND MARKING

4.1 Packing — The material shall be supplied in two separate containers as agreed to between the purchaser and the supplier.

*Specification for dimensions for wrought aluminium and aluminium alloys, sheet and strip.

†Methods of test for ready mixed paints and enamels ( second revision ). ‡Specification for ready mixed paint, brushing, zinc-chrome, priming ( revised ). §Specification for ready mixed paint, universal zinc-chrome, priming ( synthetic ) for

light alloys for aircraft. ||Specification for ready mixed paint, red oxide-zinc chrome, priming. ¶Specification for ready mixed paint, stoving, red oxide-zinc chrome, priming.

6

IS : 5666 - 1970

4.2 Mark ing — T h e containers shall be marked with the following:

a) Name of the material;

b) Manufacturer 's name and trade-mark, if any;

c) Volume of the material;

d) The month and year of manufacture; and

e) Directions for mixing.

4.2.1 The containers may also be marked with the ISI Certification Mark.

NOTE — The use of the ISI Certification Mark is governed by the provisions of the Indian. Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The ISI Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by ISI and operated by the producer. ISI marked products are also continuously checked by ISI for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the ISI Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.

4.3 The material when intended for defence purposes, shall be packed and marked in accordance with IS : 5661-1970*.

5. SAMPLING

5.1 Representative samples of the material shall be drawn as prescribed under 3 of IS : 101-1964†.

6. TEST METHODS

6.1 Tests shall be conducted as prescribed in 3.3 to 3.9.

6.2 Quality of Reagent s — Unless specified otherwise, pure chemicals and distilled water ( see IS : 1070-1960‡ ) shall be employed in tests.

NOTE — 'Pure chemicals' shall mean chemicals that do not contain impurities which affect the results of analysis.

*Code of practice for packing and marking of packages of paints, varnishes, enamels and allied products ( under print ).

†Methods of test for ready mixed paints and enamels ( second revision ). ‡Specification for water, distilled quality ( revised ).

7

B U R E A U O F I N D I A N S T A N D A R D S

Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 331 01 31, 331 13 75 Telegrams : Manaksanstha

( Common to all Offices ) Regional Offices: Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg,

NEW DELHI 110002 *Eastern : 1/14 C. I. T. Scheme VII M, V. I. P. Road,

Maniktola, CALCUTTA 700054 Northern : SCO 445-446, Sector 35-C,

CHANDIGARH 160036

Southern : C. I. T. Campus, MADRAS 600113

†Western : Manakalaya, E9 MIDC, Marol, Andheri (Eas t ) , BOMBAY 400093

Branch Offices: 'Pushpak', Nurmohamed Shaikh Marg, Khanpur,

AHMADABAD 380001 ‡Peenya Industrial Area 1st Stage, Bangalore Tumkur Road

BANGALORE 560058 Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar,

BHOPAL 462003 Plot No. 82 /83 , Lewis Road, BHUBANESHWAR 751002 53/5, Ward No. 29, R.G. Barua Road, 5th Byelane,

GUWAHATI 781003 5-8-56C L. N. Gupta Marg ( Nampally Station Road ),

HYDERABAD 500001 R14 Yudhister Marg, C Scheme, JAIPUR 302005

117/418 B Sarvodaya Nagar, KANPUR 208005

Patliputra Industrial Estate, PATNA 800013 T.C. No. 14/1421, University P.O., Palayam

TRIVANDRUM 695035 Inspection Offices ( With Sale Point ): Pushpanjali, First Floor, 205-A West High Court Road,

Shankar Nagar Square, NAGPUR 440010 Institution of Engineers ( India ) Building, 1332 Shivaji Nagar,

PUNE 411005

Telephone 331 01 31 331 13 75

36 24 99

2 18 43 3 16 41

41 24 42 41 25 19 41 29 16

*Sales Office in Calcutta is at 5 Chowringhee Approach, P. O. Princep street, Calcutta 700072

†Sales Office in Bombay is at Novelty Chambers, Grant Road, Bombay 400007

‡Sales Office in Bangalore is at Unity Building, Narasimharaja Square, Bangalore 560002

Reprography Uni t , BIS, New De lh i , Ind ia

27 68 00

89 66 28

22 36 71

2 51 71

5 24 35

5 36 27 3 31 77

23 10 83

6 34 71 6 98 32

21 68 76 21 82 92

6 23 05 6 21 04 6 21 17

6 32 92 95

2 63 48 2 63 49

38 49 55 38 49 56

6 67 16