ANALYSIS OF THE EFFECT OF ADDING COMPLEX MANGANESE ADDITIVE AS PRIMARY DRIER ON THE PERFORMANCE AND DRYING TIME OF MEDIUM OIL ALKYD PAINT

Mahardhika, Daffa Handyan (2025) ANALYSIS OF THE EFFECT OF ADDING COMPLEX MANGANESE ADDITIVE AS PRIMARY DRIER ON THE PERFORMANCE AND DRYING TIME OF MEDIUM OIL ALKYD PAINT. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Cat berbasis alkid banyak digunakan sebagai pelapis pengering udara karena biayanya yang efektif, tegangan permukaan rendah, dan aplikasinya yang luas. Namun, waktu pengeringan alaminya dapat memakan waktu hingga beberapa minggu atau bulan, yang tidak praktis. Untuk mengatasi hal ini, katalis yang dikenal sebagai "drier" untuk mempercepat proses autoksidasi. Drier berbasis kobalt adalah yang paling umum digunakan karena efektivitasnya dalam menghasilkan film yang sangat terikat silang dan keras. Namun, kobalt menimbulkan risiko lingkungan dan kesehatan yang signifikan, termasuk toksisitas, karsinogenisitas, dan dampak ekologis, yang menyebabkan pencernaan ketat seperti klasifikasi REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) Uni Eropa, yang membatasi konsentrasi kobalt di bawah 0,1% dalam formulasi. Hal ini mendorong pencarian alternatif yang lebih aman. Drier berbasis mangan telah muncul sebagai pengganti yang menjanjikan, menawarkan pengurangan risiko kesehatan dan dampak lingkungan. Pada penelitian ini digunakan kompleks mangan sebagai pengering dalam cat alkyd, yang fokus pada kemampuan mempercepat waktu pengeringan dan stabilitas penyimpanannya. Variasi kompleks mangan diuji untuk mengamati pengaruhnya terhadap waktu pengeringan, viskositas, kekerasan dalam 7 dan 14 hari pada variasi suhu 60° dan Room Temperature (RT), dan percepatan pelapukan dalam 200 jam selain itu dilakukan uji potensiodinamik untuk mengetahui resitensi korosi . Dari hasil penelitian diperoleh nilai waktu pengeringan tercepat pada sampel White B (Alkyd paint with 0,15% Additol dry CF-100) dengan waktu pengeringan total 210 menit pada 7 hari dan 225 menit setelah 14 hari, meskipun dari segi kekerasan film nilai tertinggi diperoleh pada sampel White A (Alkyd paint with 0,15% Cobalt). Namun, nilai dari uji pelapukan dipercepat, sampel White C (cat Alkyd dengan 0,15% Additol dry CF-103) memiliki nilai Δb terendah yaitu 1,4. Nilai viskositas juga menunjukkan performa yang baik menyebabkan tanpa pembentukan kulit, dari 5,5 mPas menjadi 8,5 mPas pada 7 hari dan 9,9 mPas setelah 14 hari dalam penyimpanan. Penambahan mangan dengan beberapa penstabil dapat mempercepat waktu pengeringan dan kestabilan dalam penyimpanan. Uji potensiodinamik lebih lanjut menunjukkan bahwa formulasi White A (Cobalt) menghadirkan ketahanan korosi yang optimal dengan laju korosi 0.011014 mmpy, diikuti oleh White C (Alkyd paint with 0.15% Additol dry CF-103) dengan laju korosi 0.0121 mmpy
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Alkyd-based paints are widely used as air-drying coatings due to their cost-effectiveness, low surface tension, and wide application range. However, their natural drying time can take weeks or months, which is impractical. To overcome this, catalysts known as "driers" are used to accelerate the autoxidation process. Cobalt-based driers are the most commonly used due to their effectiveness in producing highly cross-linked and hard films. However, cobalt poses significant environmental and health risks, including toxicity, carcinogenicity, and ecological impact, leading to stringent regulations such as the European Union's REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) classification, which limits cobalt concentrations below 0.1% in formulations. This has prompted the search for safer alternatives. Manganese-based driers have emerged as a promising alternative, offering reduced health risks and environmental impacts. This study utilized manganese complexes as driers in alkyd paints, focusing on their ability to accelerate drying time and storage stability. Manganese complex variations were tested to observe their effect on drying time, viscosity, hardness in 7 and 14 days at temperature variations of 60° and Room Temperature (RT), and accelerated weathering in 200 hours in addition to adhesion test and potentiodynamic test to determine the quality of paint on the substrate. From the results of the study, the fastest drying time value was obtained in the White B sample (Alkyd paint with 0.15% Additol dry CF-100) with a total drying time of 210 minutes at 7 days and 225 minutes after 14 days, although in terms of film hardness the highest value was obtained in the White A sample (Alkyd paint with 0.15% Cobalt). However, the value of the accelerated weathering test, the White C sample (Alkyd paint with 0.15% Additol dry CF-103) had the lowest Δb value of 1.4. The viscosity value also showed good performance, resulting in no skin formation, from 5.5 mPas to 8.5 mPas at 7 days and 9.9 mPas after 14 days of storage. The addition of manganese with some stabilizers can accelerate the drying time and stability in storage. Further potentiodynamic tests showed that White A (Cobalt) formulation presented optimal corrosion resistance with a corrosion rate of 0.011014 mmpy, followed by White C (Alkyd paint with 0.15% Additol dry CF-103) with a corrosion rate of 0.0121 mmpy.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Auto-oxidative, manganese-based drier, alkyd resin, catalyst, drying time, auto-oksidatif, drier berbasis mangan, resin alkid, katalis, waktu pengeringan.
Subjects:	Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Daffa Handyan Mahardhika
Date Deposited:	04 Aug 2025 08:40
Last Modified:	04 Aug 2025 08:40
URI:	http://repository.its.ac.id/id/eprint/125787

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