Polyvinyl acetal an acetal of polyvinyl alcohol.
Poly vinyl acetal diethyl aminoacetate structure.
Component of watersoluble edible film that may be used to form pouches containing pre portioned aliquots of 1 certain dry ingredients i e instant tea instant coffee hot chocolate mix flavored drink powder and whey protein supplement powder to be used by the consumer in preparing ready to serve foods and beverages at a.
Sigma aldrich offers a number of poly vinyl acetate products.
Polyacetals such as polyoxymethylene are listed in the ethers section.
View information documentation regarding poly vinyl acetate including cas msds more.
It might be outdated or ideologically biased.
This reversible saponification and esterification reaction was a strong hint for hermann staudinger in the formulation of his theory of macromolecules.
Thus the polymers contain varying levels of acetal hydroxy and acetate functionalities.
Poly 1 acetoxyethylene poly ethenyl ethanoate poly 1 acetyloxiethene.
Polyvinyl acetate is partially or completely hydrolysed to give polyvinyl alcohol.
The structure of pvb is shown in fig.
Polyvinyl butyral pvb is considered to be an acetal and is formed from the reaction of an aldehyde and alcohol.
A polymer of the general formula i.
Polyvinyl acetate is hydrolyzed to form polyvinyl alcohol.
Thus in addition to the acetal groups x.
An acetal is a functional group with the connectivity r 2 c or 2 here the r groups can be organic fragments a carbon atom with arbitrary other atoms attached to that or hydrogen while the r groups must be organic fragments not hydrogen the two r groups can be equivalent to each other a symmetric acetal or not a mixed acetal.
An aldehyde is then added to obtain polyvinyl acetal.
It is also used in adhesives.
9 41 but it is generally not made in exactly this form it is made in a way such that the polymer is a mixture of pvb polyvinyl alcohol pvoh and polyvinyl acetate segments as shown in the figure.
Polyvinyl acetate a synthetic resin prepared by the polymerization of vinyl acetate.
Us2310943a us233480a us23348038a us2310943a us 2310943 a us2310943 a us 2310943a us 233480 a us233480 a us 233480a us 23348038 a us23348038 a us 23348038a us 2310943 a us2310943 a us 2310943a authority us united states prior art keywords parts polyvinyl alcohol acid color polyvinyl prior art date 1938 10 05 legal status the legal status is an assumption and is not a legal conclusion.
Learn more about polyvinyl acetate in this article.
In its most important application polyvinyl acetate serves as the film forming ingredient in water based latex paints.
