سنتز رزین‌های آلکید آب پایه

نویسندگان

1 گروه پژوهشی پلاستیک، پژوهشگاه پلیمر و پتروشیمی ایران

2 شرکت کیمیای قم

چکیده

سنتز رزین‌های آلکید قابل پخش در آب و خواص فیلم این رزین‌ها و پوشرنگ‌های حاصله تشریح شد. رزین‌های آلکید آب پایه به چندین روش تهیه شدند. در روش نخست رزین آلکید معمولی به روش بسپارش تراکمی سنتز و سپس مخلوطی از منومرها به روش بسپارش افزایشی روی بنیان اسید چرب آن پیوند زده شد. در روش دوم ابتدا مخلوط منومرها به روش بسپارش افزایشی روی اسید چرب پیوند زده شده و سپس این اسید در ساختار رزین آلکید وارد و بسپارش تراکمی انجام شد. روش سوم با دو راهبرد انجام شد. در راهبرد اول رزین روش دوم با پلی اتیلن گلایکول (PEG) واکنش داده شد. در راهبرد دوم رزین آلکید معمولی با PEG واکنش داده شده و سپس مخلوط منومرهای وینیلی روی بنیان اسید چرب آن پیوند زده شدند. از میان روش‌های فوق، روش دوم رزین‌های هیبریدی (آلکید/مالئیک) را تولید می‌کند که دارای مزایای فرآیندی و اقتصادی مناسبی هستند. فیلم‌ها و پوشرنگ‌های رزین‌های به دست آمده در زمان‌های مشابه رزین‌های آلکید روغنی خشک شده، رنگدانه دی اکسید تیتانیوم به خوبی در آنها باز شده و درصد بالایی از این رنگدانه را در خود نگه می‌دارند. براقیت پوشرنگ‌های حاصله نیز مناسب می‌باشد. استفاده از منومر اسید مالئیک بجای اسید اکریلیک نوآوری این پژوهش می‌باشد که تاکنون گزارش نشده است.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis of Water-Based Alkyd Resins

نویسندگان [English]

  • A.A. Yousefi 1
  • E. Bigdeli 2
1 Plastic Processing & Engineering Department, Iran Polymer & Petrochemical Institute
2 Kimia Qom Co.
چکیده [English]

The paper reports on the synthesis of water-based alkyd resins and preparation of corresponding water-based paints. Several routes were adapted in the synthesis of alkyd resins. In the first route, non-modified alkyd resins were synthesized at first and then a mixture of the vinyl monomers was grafted on the fatty acid moiety of the alkyd resin via peroxide initiated polyaddition polymerization. In the second route, the vinyl monomers were grafted on fatty acid via peroxide initiated polyaddition polymerization and in the next step the grafted fatty acid was incorporated in the alkyd resin structure through polycondensation polymerization. In the third route, two different methods were adapted. In the first method, the grafted alkyd resins obtained from the first and second routes were reacted with a polyethylene glycol resin (PEG). In the second method, a non-grafted alkyd resin was reacted with PEG and then a mixture of monomers was grafted on fatty acid moiety of the prepared alkyd. Drying time of the films of the prepared resins and paints is similar to that of the solvent-based alkyd resins. The aqueous dispersions of these resins suspend high enough finely-divided titanium dioxide pigment. The gloss of the dried paint film is also high enough. Use of maleic anhydride as dispersing agent is the novelty of this work which is reported for the first time.

کلیدواژه‌ها [English]

  • Alkyd
  • resin
  • water-based
  • paint
  • maleic acid
  • Fatty Acid
  • alkyd/maleic hybrid resin
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