Lascaux Acrylic Adhesive 498 20X

Description

[Alois K Diethelm, Switzerland] A trademark for a thermoplastic acrylic resin composed of a water-based dispersion butyl acrylate and methylmethacrylate thickened with acrylic butylester. Lascaux Acrylic Adhesive 498 20X can be thinned with water, but once the film is dried it is insoluble in water. The minimum film formation temperature for 498 20X is approximately 5°C and its initial tack is faster that 498 HV. A dry film is slightly tacky and can be used as a weak pressure sensitive adhesive or it can be activated to improve adhesion with toluene, alcohol or heat. Lascaux Acrylic Adhesive 498 20X is used as an inpainting media.

Physical and Chemical Properties

• Dry films: Soluble in acetone, ethanol, toluene and xylene. Insoluble in water, white spirit and ligroin.
• Lascaux 498-20X contains 20% Thinner X
• Tg=26 C

Resources and Citations

• Talas: Information sheet

• Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989

• Product Information Comment: manufacturer's lit states composed of butyl acrylate, thickened with 20% toluene; glass transition = 26C

• Marie Svoboda, Conservation Survey Index, unpublished, 1997

• Gordon Hanlon, contributed information, 1998

• Meredith Montague, contributed information, 1998

• Teri Hensick, contributed information, 1998

• Conservation Materials Ltd., Catalog

• Conservation Support Systems, Catalog, 1997