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Article
Publication date: 1 September 1990

Mounir M. Abd El‐Malek, Nagi N. Messiha and Magdy M.H. Ayoub

Two sets of formulations based on three copolymer and three terpolymer systems involving tributyltin methacrylate(BTMA),methyl methacrylate(MMA) and acrylonitrile (AN) with…

30

Abstract

Two sets of formulations based on three copolymer and three terpolymer systems involving tributyltin methacrylate(BTMA),methyl methacrylate(MMA) and acrylonitrile (AN) with variable tin contents of 7, 15 and 22% were prepared. There is only one varient in each formulation of the six prepared, that is the type of organotin polymer whether it is a copolymer or terpolymer of a definite tin content 7 or 15 or 22%. The binder mixture is a blend consisting of the organotin polymer, a vinyl copolymer and its external plasticizer and little amount of rosin. A moderate and fixed amount of cuprous oxide was introduced into all formulations as a supplementary toxin with organotin polymer. Leaching rates of micro amounts of copper and tin were determined. Panel exposure test in the sea was performed at Port Said. Best antifouling efficiency was obtained from formultions containing organotin copolymer or terpolymer of 22% tin content and that containing organotin copolymer of 15% tin.

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Pigment & Resin Technology, vol. 19 no. 9
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 August 1990

Mounir, M.Abd El‐Malek, Nagi, N. Messiha, Magdy and M.H. Ayoub

The effect of pigment filler and extender on the antifouling efficiency of six compositions containing organotin polymer is studied. The binder mixture is a blend containing a…

29

Abstract

The effect of pigment filler and extender on the antifouling efficiency of six compositions containing organotin polymer is studied. The binder mixture is a blend containing a copolymer of tri‐n‐butyltin methacrylate and methylmeth acrylate (OTP) with 22% tin content, a vinyl copolymer with its external plasticizer and little amount of rosin. Cuprous oxide was added as a supplementary toxin with the OTP. Leaching rates of microamounts of copper and tin were determined for a period of nearly one year applying standard techniques. Painted plates were immersed in Suez Canal waters at Port‐Said for more than 36 months. Comparison between different fillers and extenders on the antifouling behaviour of painted surfaces is shown. Compositions containing cellite and china clay exhibited the maximum antifouling performance.

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Pigment & Resin Technology, vol. 19 no. 8
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 February 1990

A.A. Abd El‐Hakim, M.A. Abd El‐Ghaffar, M.M. Abd El‐Malek and E.A.M. Youssef

Results and discussion Adsorption isotherms of stearic acid on the surface of manganese ore samples:

10

Abstract

Results and discussion Adsorption isotherms of stearic acid on the surface of manganese ore samples:

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Anti-Corrosion Methods and Materials, vol. 37 no. 2
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 January 1990

A.A. Abd El‐Hakim, M.A. Abd El‐Ghaffar, M.M. Abd El‐Malek and E.A.M. Youssef

The adsorption of stearic acid molecules onto the surface of the Egyptian manganese ore (high and medium grades, H.G. & M.G.) was followed by adsorption isotherm determination and…

15

Abstract

The adsorption of stearic acid molecules onto the surface of the Egyptian manganese ore (high and medium grades, H.G. & M.G.) was followed by adsorption isotherm determination and the sedimentation properties of the ore in apolar medium. It was found that the sedimentation properties depend on the adsorbed amount in the isotherm, the most stable dispersion for the ore in the organic medium was detected at monolayer surface coverage of stearic acid molecules on the surface of the ore.

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Anti-Corrosion Methods and Materials, vol. 37 no. 1
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 October 1988

M.A. Abd El‐Ghaffar, A.Z. Gomaa, M.M. Abd El‐Malek, E.A.M. Youssef and A.A. Abd El‐Hakim

The corrosion protective properties of the primer films prepared from Egyptian manganese ore (high and medium grades) and epoxy resin have been determined by immersing coated…

19

Abstract

The corrosion protective properties of the primer films prepared from Egyptian manganese ore (high and medium grades) and epoxy resin have been determined by immersing coated films in artificial sea water for 28 days. The good corrosion protective properties indicate that the Egyptian manganese ore can be satisfactorily used in anticorrosive primer formulations for steel surface protection.

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Anti-Corrosion Methods and Materials, vol. 35 no. 10
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 November 1990

M.M. Osman, M.M. Abd El‐Malek and A.B. Tadros

Reaction of 4‐amino‐3‐thio‐1,2,4‐triazolidine with etnyl‐acetoacetate and acetoacetanilide produced 4‐(ethy‐lacetoacetamino)‐3‐thio, 1,2,4‐triazolidine and…

23

Abstract

Reaction of 4‐amino‐3‐thio‐1,2,4‐triazolidine with etnyl‐acetoacetate and acetoacetanilide produced 4‐(ethy‐lacetoacetamino)‐3‐thio, 1,2,4‐triazolidine and 4‐(acetoacetanilidamino, ‐3‐thio‐1,2,4‐triazolidine respectively. These were characterised by elemental analysis, 1Rand 1HNMR spectra. Each compound was tested as antifoulant in marine paint formulation in the presence of tributyftin fluoride as a co‐toxin. The antifouling behaviour of the compounds was compared with that of the parent one, 4‐amino‐3‐thio‐1,2,4‐triazalidine and its condensation products with other aromatic and heterocyclic carbonyl derivatives.

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Pigment & Resin Technology, vol. 19 no. 11
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 July 1986

N.N. Messiha, M.M. Abd El‐Malek and M.M.H. Ayoub

Three copolymer and three terpolymer systems involving tributyltin methacrylate, methyl methacrylate and acrylonitrile were prepared with variable tin content of 7, 15 and 22%…

36

Abstract

Three copolymer and three terpolymer systems involving tributyltin methacrylate, methyl methacrylate and acrylonitrile were prepared with variable tin content of 7, 15 and 22%. The structure of the organotin polymers was investigated by the elemental analysis of tin and nitrogen and by infrared spectroscopy. Long‐term leaching rate determinations of tin from the organotin polymer films were studied and were in the range of 0.033–0.045 ?g Sn/cm2/day. The antifouling performance of the prepared polymer varnishes was tested at Ismailia and at Alexandria. Tributyltin methacrylate‐methyl methacrylate copolymer with tin content of 22% exhibited the highest antifouling potential for more than 18 months.

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Pigment & Resin Technology, vol. 15 no. 7
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 March 1988

M.M. AbdEl‐Malek, N.N. Messiha and M.M.H. Ayoub

To organotin polymer systems were prepared based on the reaction of tri‐n‐butyltin methacrylate with methyl methacrylate ad acrylonitrile. Tin content of the polymers was about…

34

Abstract

To organotin polymer systems were prepared based on the reaction of tri‐n‐butyltin methacrylate with methyl methacrylate ad acrylonitrile. Tin content of the polymers was about 22% and the physical properties of the organotin polymer films were investigated. The anti‐fouling potential of the prepared polymers was investigated as unpigmented and pigmented coatings at Alexandria and Port‐Said. Compositions containing vinyl copolymer as a co‐resin as well as cuprous oxide as a supporting toxin showed good antifouling performance for more than three years.

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Pigment & Resin Technology, vol. 17 no. 3
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 June 1996

E.A.M Youssef

Highly efficient heat‐resistant paint formulations based on Egyptian manganese ore (high and medium grades) and silicon resin were prepared. The heat‐resistance efficiency as well…

46

Abstract

Highly efficient heat‐resistant paint formulations based on Egyptian manganese ore (high and medium grades) and silicon resin were prepared. The heat‐resistance efficiency as well as the physico‐mechanical properties of the painted films were evaluated. Promising results were deduced, showing that manganese ore imparts heat‐resistance protection for painted substrate up to 450°C. The anticorrosive properties of these paint formulations were moderate but their efficiency as heat‐resistant anticorrosive paints was improved by adding 1 per cent of melamine to the paint constituents.

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Anti-Corrosion Methods and Materials, vol. 43 no. 6
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 February 1990

M.M.H. Ayoub, M.M. Abdel Malek and N.N. Messiha

An organotin copolymer with tin content of 22% was prepared by the reaction of methyl methacrylate and tri‐n‐butyltin methacrylate. The prepared copolymer was incorporated into a…

74

Abstract

An organotin copolymer with tin content of 22% was prepared by the reaction of methyl methacrylate and tri‐n‐butyltin methacrylate. The prepared copolymer was incorporated into a paint formulation containing cuprous oxide as an external toxin. Laboratory evaluation of the formulation showed that the average value of the leaching rate of Cu was 7 µg/cm2/day, while the leaching rate of tin was found to be in the range of 0.033 µg/cm2/day. The antifouling performance of the prepared formulation was tested as painted areas on the hull of a trading ship. After about one year's running period through the Mediterranean and Red Sea harbours the tested areas showed good antifouling efficiency compared with the commercial antifouling paint.

Details

Pigment & Resin Technology, vol. 19 no. 2
Type: Research Article
ISSN: 0369-9420

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