Difference between revisions of "Paraloid B-72"

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Acryloid B-72; Paraloid B72; Paraloid B-72; Acryloid B-72 (sp); Acryloid B72 (sp); Paraloid B72 (Port.)
 
Acryloid B-72; Paraloid B72; Paraloid B-72; Acryloid B-72 (sp); Acryloid B72 (sp); Paraloid B72 (Port.)
  
[[[SliderGallery rightalign|MFA- Acryloid B-72.jpg~FTIR]]]
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[[[SliderGallery rightalign|Paraloid B-72 FTIR.PNG~FTIR]]]
  
 
== Other Properties ==
 
== Other Properties ==

Revision as of 14:36, 30 November 2016

Injecting Paraloid B-72

Description

[Rohm & Haas] A registered trademark for a clear, colorless, thermoplastic acrylic resin. Paraloid B-72 (formerly called Acryloid B-72 in the United States) is composed of an ethyl methacrylate (70%) and methyl acrylate (30%) copolymer. It was a shown to be a very stable resin for use in conservation (Feller 1972). Initially, Paraloid B-72 was supplied as white irregular lumps with a slight acrylic acid smell and a composition of ethyl methacrylate (68%) and methyl acrylate (28%); by 1976 the product changed to the odorless, transparent globules (de Witte et al 1978). Commercially, Paraloid B-72 is used as a general purpose coating. It produces a stable, wear resistant, nonyellowing finish. It is compatible with vinyl, cellulosic, and silicone resins. In conservation, Paraloid B-72 has been used as a coating, consolidant, and adhesive. Paraloid B-72 is supplied as solid pellets or as a 50% solids solution in toluene (Paraloid B-72 50%).

Paraloid B-72 and microballoon fills

Synonyms and Related Terms

Acryloid B-72; Paraloid B72; Paraloid B-72; Acryloid B-72 (sp); Acryloid B72 (sp); Paraloid B72 (Port.)

FTIR

Paraloid B-72 FTIR.PNG


Other Properties

Soluble in toluene, xylene, acetone, carbon tetrachloride, MEK.

Paraloid B-72 made after 1976 is soluble in ethanol.

Slightly soluble in isopropanol.

Insoluble in aliphatic hydrocarbons, water, oils, grease.

Molecular Weight Tg = 40 C
Refractive Index 1.479-1.489

Hazards and Safety

Talas: MSDS

Additional Information

Jerry Podany, Kathleen M. Garland, William R. Freeman, Joe Rogers, "Paraloid B-72 as a Structural Adhesive and as a Barrier Within Structural Adnesive Bonds: Evaluations of Strength and Reversibility" JAIC 40(1), 2001 (link).

J. Down, M.MacDonald, J.Te'treault, S.Williams, "Adhesive Testing at the Canadian Conservation Institute-An Evaluation of Selected Poly(Vinyl acetate) and Acrylic Adhesives", Studies in Conservation 41:19-44, 1996.

E. de Witte, M.Goessens-Landrie, E.J.Goethals, T.Simonds, "The Structure of 'Old' and 'New' Paraloid B72", ICOM preprints 78/16/3/1-9, Zagreb, 1978.

R.L.Feller, N.Stolow, E.H.Jones, On Picture Varnishes and their Solvents, the press of Case Western Reserve University, Cleveland, 1972.

Authority (List of sources checked for information on this material)

  • Ralph Mayer, Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Paintings Specialty Group, Paintings Specialty Group, Painting Conservation Catalog, Wendy Samet (ed.), AIC, Washington, DC, 1998
  • Book and Paper Group, Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
  • Marie Svoboda, Marie Svoboda, Conservation Survey Index, unpublished, 1997
  • Conservation Support Systems, Conservation Support Systems, Catalog, 1997
  • Product Information Comment: Rohm and Haas acryloid acrylic resins sheet.1986
  • External source or communication, External source or communication Comment: CoOL DistList 2/10/2002
  • Website address 1, Website address 1 Comment: www.rohmhaas.com

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