Difference between revisions of "Paraloid B-72"

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[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%).
 
[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%).
  
[[File:DT 9-29-2004 08-B72 and microballoon fills.jpg|thumb|Paraloid B-72 and
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[[File:DT 9-29-2004 08-B72 and microballoon fills.jpg|thumb|Paraloid B-72 and microballoon fills]]
  
microballoon fills]]
 
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
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[[[SliderGallery rightalign|Paraloid B-72 FTIR.PNG~FTIR]]]
 
[[[SliderGallery rightalign|Paraloid B-72 FTIR.PNG~FTIR]]]
  
== Other Properties ==
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== Applications ==
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 +
== Personal Risks ==
  
Soluble in toluene, xylene, acetone, carbon tetrachloride, MEK.  
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Talas: [http://talasonline.com/photos/msds/b72.pdf MSDS]
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== Collection Risks ==
 +
'''Links to Oddy Test results posted on AIC Wiki Materials Database Pages for individual materials below'''
  
Paraloid B-72 made after 1976 is soluble in ethanol.
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[http://www.conservation-wiki.com/wiki/Oddy_Test_Results:_Exhibition_Adhesives_and_Tapes#Paraloid0001 Paraloid B72] tested in 2013
 
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== Environmental Risks ==
Slightly soluble in isopropanol.
 
 
 
Insoluble in aliphatic hydrocarbons, water, oils, grease.
 
 
 
{| class="wikitable"
 
|-
 
! scope="row"| Molecular Weight
 
| Tg = 40 C
 
|-
 
! scope="row"| Refractive Index
 
| 1.479-1.489
 
|}
 
  
== Hazards and Safety ==
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== Physical and Chemical Properties ==
  
Talas: [http://talasonline.com/photos/msds/b72.pdf MSDS]
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* 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 = 105,000
 +
* Tg = 40 C
 +
* Refractive Index = 1.479-1.489
  
== Additional Information ==
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== Working Properties ==
  
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 ([http://aic.stanford.edu/jaic/articles/jaic40-01-002_appx.html link]).
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== Forms and Sizes ==
  
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. 
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== Resources and Citations ==
  
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.
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* 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 ([http://aic.stanford.edu/jaic/articles/jaic40-01-002_appx.html link]).  
  
R.L.Feller, N.Stolow, E.H.Jones, ''On Picture Varnishes and their Solvents'', the press of Case Western Reserve University, Cleveland, 1972.
+
* 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.
  
'''Links to Oddy Test results posted on AIC Wiki Materials Database Pages for individual materials below'''
+
* 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.
 
 
[http://www.conservation-wiki.com/wiki/Oddy_Test_Results:_Exhibition_Adhesives_and_Tapes#Paraloid0001 Paraloid B72] tested in 2013
 
  
== Authority (List of sources checked for information on this material)==
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* R.L.Feller, N.Stolow, E.H.Jones, ''On Picture Varnishes and their Solvents'', the press of Case Western Reserve University, Cleveland, 1972.
  
 
* Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing)
 
* Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing)
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* Conservation Support Systems, Catalog, 1997
 
* Conservation Support Systems, Catalog, 1997
  
* Product Information Comment: Rohm and Haas acryloid acrylic resins sheet.1986
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* Product Information: Rohm and Haas acryloid acrylic resins sheet.1986
  
* External source or communication  Comment: CoOL DistList 2/10/2002
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* CoOL DistList 2/10/2002
  
* Website address 1  Comment: www.rohmhaas.com
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* Website address: www.rohmhaas.com
  
  
  
[[Category:Materials database]] [[Category:MWG]]
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[[Category:Materials database]][[Category:MWG]][[Category:Coatings]][[Category: Coating: Solvent-based]][[Category:Adhesives]][[Category: Adhesive: Solvent-based]]

Latest revision as of 15:37, 21 October 2022

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


Applications

Personal Risks

Talas: MSDS

Collection Risks

Links to Oddy Test results posted on AIC Wiki Materials Database Pages for individual materials below

Paraloid B72 tested in 2013

Environmental Risks

Physical and Chemical 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 = 105,000
  • Tg = 40 C
  • Refractive Index = 1.479-1.489

Working Properties

Forms and Sizes

Resources and Citations

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