Preparation of polyurethane wood adhesives by polyols formulated with polyester polyols based on castor oil

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• 作者：Peyman Najafi Moghadam^a ; ¹ ; ^{p_najafi27@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; ^{p.najafi@urmia.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Mazaher Yarmohamadi^b ; ² ; ^{mazahervasel@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Reza Hasanzadeh^a ; ¹ ; ^{reza.hasanzade7@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Sirus Nuri^b ; ² ; ^{sirousnouri@urmia.ac.ir" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Castor oil ; Dicarboxylic acid ; Polyester polyol ; Polyurethane wood adhesive
• 刊名：International Journal of Adhesion and Adhesives
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：68
• 期：Complete
• 页码：273-282
• 全文大小：1344 K

文摘

The aim of this work was the synthesis of polyester polyols from renewable sources as one of the important compounds of polymeric polyurethane (PU) adhesives. The polyester polyols were synthesized by condensation polymerization of different dicarboxylic acids with castor oil and the reaction conditions were in agreement with green chemistry principles. The preparation of PU wood adhesives was carried out by the reaction of each obtained polyester polyol with 4, 4′-diphenylmethane diisocyanate (MDI). The adhesive performance was improved by mixing the obtained polyester polyols with polypropylene glycol (PPG 400) and butanediol (BD). Different NCO/OH ratios were used to obtain adhesives with appropriate properties. The structures of the synthesized polyesters and adhesives were characterized by FTIR, thermogravimetric analysis (TGA) and lap shear strength values were also determined in various conditions such as cold water, hot water, acid and alkali solutions.