Difference between revisions of "Butyl methacrylate"

Latest revision as of 12:43, 11 May 2022

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.

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

Chemical structure

Risks

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

Physical and Chemical Properties

Insoluble in water.
Tg = 22 C

Composition	H3C:CCH3COOC4H9
CAS	97-88-1
Melting Point	-75 C
Density	0.895 g/ml
Molecular Weight	mol. wt. = 142.097
Refractive Index	1.4220
Boiling Point	163-164 C

Comparisons

Physical Properties for Selected Thermoplastic Resins

General Characteristics of Polymers

Resources and Citations

B. Epley, "The History of Synthetic Resin Varnishes", AIC Painting Conservation Catalog: Varnishes and Surface Coatings, p.39, 1998.

Paintings Specialty Group, Painting Conservation Catalog, Wendy Samet (ed.), AIC, Washington, DC, 1998

@@ Line 1: / Line 1: @@
 == Description ==
-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.
+A clear, colorless liquid used for the production of [[acrylic resin|acrylic resins]]. As early as the 1930s, solutions of polyisobutyl methacrylate (then [[Lucite|Lucite®]] 45, now [[Elvacite|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 Varnish|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 Colors|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%20methacrylate polymethyl methacrylate].
+See also [[polymethyl methacrylate]].
 == Synonyms and Related Terms ==
@@ Line 12: / Line 12: @@
 [[[SliderGallery rightalign|butyl methacrylate.jpg~Chemical structure]]]
+== Risks ==
-== Other Properties ==
+* 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: [https://fscimage.fishersci.com/msds/59652.htm MSDS]
-Insoluble in water.
+==Physical and Chemical Properties==
-Tg = 22 C
+* Insoluble in water.
+* Tg = 22 C
 {| class="wikitable"
@@ Line 28: / Line 38: @@
 |-
 ! scope="row"| Melting Point
-| -75
+| -75 C
 |-
 ! scope="row"| Density
-| 0.895
+| 0.895 g/ml
 |-
 ! scope="row"| Molecular Weight
@@ Line 40: / Line 50: @@
 |-
 ! scope="row"| Boiling Point
-| 163-164
+| 163-164 C
 |}
-== 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: [https://fscimage.fishersci.com/msds/59652.htm MSDS]
-== Additional Information ==
-B. Epley, "The History of Synthetic Resin Varnishes", ''AIC Painting Conservation Catalog: Varnishes and Surface Coatings'', p.39, 1998.
 == Comparisons ==
@@ Line 65: / Line 59: @@
 [[media:download_file_357.pdf|General Characteristics of Polymers]]
+== Resources and Citations ==
+* B. Epley, "The History of Synthetic Resin Varnishes", ''AIC Painting Conservation Catalog: Varnishes and Surface Coatings'', p.39, 1998.
-== Authority ==
 * Paintings Specialty Group, ''Painting Conservation Catalog'', Wendy Samet (ed.), AIC, Washington, DC, 1998