ポリ酢酸ビニル

ポリ酢酸ビニル（PVAc）は、白色から薄黄色の無臭固体であり、通常は粉末、水性分散液、または樹脂溶液の形態で供給される。その軟化温度は分子量および可塑剤含有量に応じて28–40 ℃以上であり、明確な融点を示さず、分解前に軟化する。ポリ酢酸ビニルは、酢酸ビニルモノマーのラジカル重合によって得られる合成有機高分子である。主な用途は、水系接着剤、建築用塗料、紙コーティングにおけるバインダーおよびフィルム形成剤であり、ポリビニルアルコールやポリ（酢酸ビニル-共-エチレン）共重合体の前駆体としても広く用いられている。主な応用分野には、建設用接着剤、室内壁用塗料、繊維上漿剤、包装用ラミネートが含まれる。

As an emulsion in water, aPVAc emulsions are used as adhesives for porous materials, particularly for wood, paper, and cloth, and as a consolidant for porous building stone, in particular sandstone . Uses : As wood glue PVAc is known as "white glue" and the yellow "carpenter's glue" or PVA glue. As paper adhesive during paper packaging converting In bookbinding and book arts, due to its flexible strong bond and non-acidic nature (unlike many other polymers). The use of PVAC on the Archimedes Palimpsest during the 20th century greatly hindered the task of disbinding the book and preserving and imaging the pages in the early 21st century, in part because the glue was stronger than the parchment it held together.The stiff homopolymer PVAc, but mostly the more soft copolymer a combination of vinyl acetate and ethylene, vinyl acetate ethylene (VAE), is used also in paper coatings, paint and other industrial coatings, as binder in nonwovens in glass fibers. sanitary napkins, filter paper and in textile finishing PVAc can also be used as coating to protect cheese from fungi and humidity. Polyvinyl acetate is also the raw material to make other polymers like : Polyvinyl alcohol -[HOCHCH2]-: Polyvinyl acetate is partially or completely hydrolysed to give polyvinyl alcohol. This reversible saponification and esterification reaction was a strong hint for Hermann Staudinger in the formulation of his theory of macro molecules. Polyvinyl acetate phthalate (PVAP): Polyvinyl acetate is partially hydrolyzed and then esterified with phthalic acid.
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