Difference between revisions of "Butyl methacrylate"
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== Description == | == Description == | ||
| − | A clear, colorless liquid used for the production of [http://cameo.mfa.org/materials/fullrecord.asp?name=acrylic | + | A clear, colorless liquid used for the production of [http://cameo.mfa.org/materials/fullrecord.asp?name=acrylic%20resin acrylic resins]. As early as the 1930s, solutions of polyisobutyl methacrylate (then [http://cameo.mfa.org/materials/fullrecord.asp?name=Lucite%C2%AE Lucite®] 45, now [http://cameo.mfa.org/materials/fullrecord.asp?name=Elvacite%C2%AE Elvacite®] 2045) and poly n-butyl methacrylate (then Lucite® 44, now Elvacite® 2044) were used as picture varnishes (Epley 1998). By the 1960s, the resins fell into disuse because tests indicated they can crosslink. In the mid 1980s, Golden Artist colors introduced [http://cameo.mfa.org/materials/fullrecord.asp?name=Golden%20MSA%20varnish Golden MSA varnishes] a proprietary mixture of isobutyl and n-butyl methacrylate polymers in a mineral spirits/Stoddard solvent type mixture. Polybutyl methacrylate was also used to make [http://cameo.mfa.org/materials/fullrecord.asp?name=Magna%20Plastic%20colors Magna Plastic] paints from 1949 to the mid-1970s. A similar formulation is now made and sold as MSA colors. |
| − | See also [http://cameo.mfa.org/materials/fullrecord.asp?name=polymethyl | + | See also [http://cameo.mfa.org/materials/fullrecord.asp?name=polymethyl%20methacrylate polymethyl methacrylate]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | poly (n-butylmethacrylate); pnBMA; polibutilmetacrilato (Esp.); poli (n-butilmetacrilato) (Esp.); butyl- | + | poly (n-butylmethacrylate); pnBMA; polibutilmetacrilato (Esp.); poli (n-butilmetacrilato) (Esp.); butyl-méhacrylate (Fr.); poli butil methacrilato (It.); polibutilmetacrilato (Port.); methacrylic acid; butyl ester |
| − | Examples: | + | Examples: Lucite® 44; Elvacite® 2044 |
[[[SliderGallery rightalign|butyl methacrylate.jpg~Chemical structure]]] | [[[SliderGallery rightalign|butyl methacrylate.jpg~Chemical structure]]] | ||
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== Authority == | == Authority == | ||
| − | * | + | * Paintings Specialty Group, ''Painting Conservation Catalog'', Wendy Samet (ed.), AIC, Washington, DC, 1998 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:52, 24 July 2013
Description
A clear, colorless liquid used for the production of acrylic resins. As early as the 1930s, solutions of polyisobutyl methacrylate (then Lucite® 45, now Elvacite® 2045) and poly n-butyl methacrylate (then Lucite® 44, now Elvacite® 2044) were used as picture varnishes (Epley 1998). By the 1960s, the resins fell into disuse because tests indicated they can crosslink. In the mid 1980s, Golden Artist colors introduced Golden MSA varnishes a proprietary mixture of isobutyl and n-butyl methacrylate polymers in a mineral spirits/Stoddard solvent type mixture. Polybutyl methacrylate was also used to make Magna Plastic paints from 1949 to the mid-1970s. A similar formulation is now made and sold as MSA colors.
See also polymethyl methacrylate.
Synonyms and Related Terms
poly (n-butylmethacrylate); pnBMA; polibutilmetacrilato (Esp.); poli (n-butilmetacrilato) (Esp.); butyl-méhacrylate (Fr.); poli butil methacrilato (It.); polibutilmetacrilato (Port.); methacrylic acid; butyl ester
Examples: Lucite® 44; Elvacite® 2044
Other Properties
Insoluble in water.
Tg = 22 C
| Composition | H3C:CCH3COOC4H9 |
|---|---|
| CAS | 97-88-1 |
| Melting Point | -75 |
| Density | 0.895 |
| Molecular Weight | mol. wt. = 142.097 |
| Refractive Index | 1.4220 |
| Boiling Point | 163-164 |
Hazards and Safety
Combustible. Flash point = 41 C Moderate fire risk.
Lachrymator. Toxic by ingestion. Contact causes irritation.
Potential teratogen.
Crosslinks under strong fluorescent light exposure.
Fisher Scientific: MSDS
Additional Information
B. Epley, "The History of Synthetic Resin Varnishes", AIC Painting Conservation Catalog: Varnishes and Surface Coatings, p.39, 1998.
Comparisons
Physical Properties for Selected Thermoplastic Resins
General Characteristics of Polymers
Authority
- Paintings Specialty Group, Painting Conservation Catalog, Wendy Samet (ed.), AIC, Washington, DC, 1998