Paraloid B-48N
Description
[Rohm & Haas] A registered trademark for a clear, colorless, Thermoplastic Acrylic resin. Paraloid® B-48N (formerly called Acryloid® B-48N in the United States) is a copolymer of Methyl methacrylate and butyl acrylate. It contains an Adhesion promoter that assists bonding to bare and primed metals. Analysis indicates that it also contains a Plasticizer, Dibutyl phthalate, that is sometimes concentrated in a residue on the bottom of the container. Paraloid® B-48N is used as a clear coating for metals (Copper, Brass, Bronze, and Zinc). It produces a tough, flexible coating with excellent durability. Paraloid® B-48N is supplied as solid pellets or as 45% solids solution in Toluene (Paraloid® B-48S).
Synonyms and Related Terms
Acryloid B-48N; Paraloid B48N (sp); Paraloid B-48S; Acryloid B48N (sp); Acryloid B-48N (sp)
Physical and Chemical Properties
- Soluble in toluene, xylene, Cellosolve acetate, methyl ethyl ketone, and acetone.
- Adding 2% ethanol may reduce cloudiness and stringiness.
- Density = 1.15
- Molecular Weight = 250,000
- Tg = 50 C
- Refractive Index = 1.89
Risks
- Talas: MSDS
Resources and Citations
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.
- B. Rydzewski, Submissitted information, Jan. 2009
- Product Information Comment: Rohm and Haas acryloid acrylic resins sheet. 1986.
- Comment: www.rohmhaas.com
- Marie Svoboda, Conservation Survey Index, unpublished, 1997
- Cricket Harbeck, Adhesives Commonly used in Objects Conservation, unpublished, 1996
- Conservation Materials Ltd., Catalog
- Conservation Support Systems, Catalog, 1997