Difference between revisions of "Polyvinyl acetal"

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== Description ==
 
== Description ==
  
1) A general name for a family of thermoplastic vinyl resins produced by the condensation of [http://cameo.mfa.org/materials/fullrecord.asp?name=polyvinyl%20alcohol polyvinyl alcohol] with an [http://cameo.mfa.org/materials/fullrecord.asp?name=aldehyde aldehyde]. Examples are polyvinyl acetal (Alvar), polyvinyl formal ([http://cameo.mfa.org/materials/fullrecord.asp?name=Formvar%C2%AE Formvar®]) and polyvinyl butyral ([http://cameo.mfa.org/materials/fullrecord.asp?name=Butvar%C2%AE Butvar®]). They are used as adhesives, paints, coatings, and films.  
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1) A general name for a family of thermoplastic vinyl resins produced by the condensation of [[polyvinyl%20alcohol|polyvinyl alcohol]] with an [[aldehyde|aldehyde]]. Examples are polyvinyl acetal (Alvar), polyvinyl formal ([[Formvar%C2%AE|Formvar®]]) and polyvinyl butyral ([[Butvar%C2%AE|Butvar®]]). They are used as adhesives, paints, coatings, and films.  
  
2) A specific name for resins made from the condensation of polyvinyl alcohol with acetaldehyde (Alvar). Polyvinyl acetal is a thermoplastic, transparent resin used in lacquers, coating and for phonograph records. It is tough and hard with good adhesion but weathers less well than [http://cameo.mfa.org/materials/fullrecord.asp?name=polyvinyl%20acetate polyvinyl acetate].  
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2) A specific name for resins made from the condensation of polyvinyl alcohol with acetaldehyde (Alvar). Polyvinyl acetal is a thermoplastic, transparent resin used in lacquers, coating and for phonograph records. It is tough and hard with good adhesion but weathers less well than [[polyvinyl%20acetate|polyvinyl acetate]].  
  
Note: these resins are not the same as [http://cameo.mfa.org/materials/fullrecord.asp?name=acetal%20resin acetal resins].
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Note: these resins are not the same as [[acetal%20resin|acetal resins]].
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==

Revision as of 10:28, 10 May 2016

Polyvinyl acetal (Alvar)

Description

1) A general name for a family of thermoplastic vinyl resins produced by the condensation of Polyvinyl alcohol with an Aldehyde. Examples are polyvinyl acetal (Alvar), polyvinyl formal (Formvar®) and polyvinyl butyral (Butvar®). They are used as adhesives, paints, coatings, and films.

2) A specific name for resins made from the condensation of polyvinyl alcohol with acetaldehyde (Alvar). Polyvinyl acetal is a thermoplastic, transparent resin used in lacquers, coating and for phonograph records. It is tough and hard with good adhesion but weathers less well than Polyvinyl acetate.

Note: these resins are not the same as acetal resins.

Synonyms and Related Terms

poly(vinyl acetal); polivinilacetal (Esp.); Alvar; Butvar® [Solutia]; Formvar® [Solutia]; Vinylite [Union Carbide];

Additional Information

° Krysia E. Spirydowicz, Elizabeth Simpson, Robert A. Blanchette, Arno P. Schniewind, Mauray K. Toutloff, Alison Murray, 'Alvar and Butvar: The Use of Polyvinyl Acetal Resins for the Treatment of the Wooden Artifacts from Gordion, Turkey', JAIC 40(1), 2001.

Sources Checked for Data in Record

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988

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