Elvacite

Description

[Lucite International] A registered trademark for a series of polymers composed of ethyl or butyl methacrylate resins. Previously called Lucite® resins, these acrylics were tried as picture varnishes in the 1930s and 40s because they were resistant to yellowing. However subsequent testing has shown that the butyl methacrylates crosslink when exposed to light and become 50% insoluble after 22 years (Feller, 1971). Additionally Elvacite® 2044 has a low glass transition point, which makes it soft and susceptible to dirt collection.

-Elvacite® 2043 - ethyl methacrylate; Tg = 65C.

-Elvacite® 2044 - n-butyl methacrylate; Tg = 20C.

-Elvacite® 2045 - isobutyl methacrylate; Tg = 50C.

-Elvacite® 2046 - a 1:1 mixture of 2044 and 2045; Tg = 35C.

-Elvacite® 2013

-Elvacite® 2028

Synonyms and Related Terms

Lucite® resin [DuPont]

FTIR

FTIR

Other Properties

Soluble in turpentine, ligroin, toluene.

Refractive Index	1.483

Additional Information

° Lucite International: Website

° 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.

Sources Checked for Data in Record

• Jane Down, Maureen MacDonald, Jean Te'treault, Scott 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

• C.V.Horie, Materials for Conservation, Butterworth-Heineman, London, 1997

• Marie Svoboda, Conservation Survey Index, unpublished, 1997

• Teri Hensick, contributed information, 1998

• Cricket Harbeck, Adhesives Commonly used in Objects Conservation, unpublished, 1996