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Studies on Synthesis and Properties of Urea formaldehyde Adhesives
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نویسنده
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SHEIKH ANSAR MEHMOOD ,KHOKHAR IRSHAD ,ANWAR MUHAMMAD SHAFIQUE ,KHAN MUHAMMAD NAEEM ,AKHTAR HIFZA
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منبع
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journal of the chemical society of pakistan - 2008 - دوره : 30 - شماره : 1 - صفحه:20 -22
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چکیده
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A low cost synthesis of urea formaldehyde adhesive from local raw materials was developed. urea (100g) was dissolved in 37 % formalin (150ml) and transferred to flask. with naoh solution, the ph was adjusted to 8.5 and refluxed for two hours on water bath until required viscosity was obtained. the viscosity (180-280cps), solid contents (45-63 %), density (1.80-2.25g/ ml), ph (7.0-8.5) and shelf life (4-115 days) were measured to judge the level of quality. the parameters: viscosity, density, solid contents, appearance and ph were found to be compatible with the standard values. moderate pot-life and tensile strength on application to wood were found to be encouraging
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آدرس
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Material Science Research Centre, PCSIR Laboratories Complex, Pakistan, University of the Punjab, Institute of Chemistry, Pakistan, Material Science Research Centre, PCSIR Laboratories Complex, Pakistan, Applied Chemistry Research Centre, PCSIR Laboratories Complex, Pakistan, Applied Chemistry Research Centre, PCSIR Laboratories Complex, Pakistan
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Authors
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