Sterilization and structural reinforcement of art objects made of organic material

• US 4,246,295 A
• Filed: 09/15/1978
• Issued: 01/20/1981
• Est. Priority Date: 09/15/1978
• Status: Expired due to Term

• Current Assignee: Megarad, Inc.
• Original Assignee: Ioan G. Crihan
• Inventors: Crihan, Ioan G.
• Primary Examiner(s): Smith, Ronald H.
• Assistant Examiner(s): Page, Thurman K.
• Application Number:
  US05/942,664
• Time in Patent Office: 858 Days
• Field of Search: 422/22, 427/4, 427/13, 427/36, 427/44, 427/140, 427/296, 427/297, 428/481, 250/431 R, 250/432 R, 250/492 B, 250/455
• US Class Current: 427/504
• CPC Class Codes: B27K 3/08 Impregnating by pressure , e.g. vacuum impregnation
• CPC Class Codes: B27K 3/156 Combined with grafting onto wood fibres
• CPC Class Codes: B44D 7/00 Preserving paintings, e.g. by varnishing
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 97/02 Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N
• CPC Class Codes: D06M 10/008 Treatment with radioactive elements or with neutrons, alpha, beta or gamma rays

Abstract

A method for treatment of an organic material containing art object, such as a wood carving, a painting on wood or canvas, a textile hanging or a tooled leather saddle, for preservation and restoration thereof. The method includes the steps of partially impregnating the art object with an unsaturated resin and exposing the partially impregnated art object to a large dose of radiation to polymerize the resin, without addition of any catalysts and without the production of any significant exothermic reaction. The polymerized resin strengthens the art object and the radiation sterilizes the art object, destroying insects, molds, and other destructive biological vectors.

Claims

1. In the method of sterilizing and structurally reinforcing art objects selected from the group consisting of tapestries, oil paintings on canvas, and wood carvings, the art object being made of an organic material having biological vectors present, the steps of:

positioning said art object face down on a vacuum source and applying a vacuum,

partially impregnating said art object by applying an unsaturated resin in an area of said art object to be reinforced while the vacuum is being applied to draw said unsaturated resin to a desired depth in said art object,

polymerizing said resin in situ by subjecting the art object and the unsaturated resin impregnant to a dose of ionizing radiation sufficient to polymerize said resin and sufficient to kill any biological vector in said art object.

2. The method of claim 1 in which the dose of ionizing radiation is approximately 5000000 RAD, of radiation emitted by a radioactive isotope.

3. The method of claim 2 in which the radioactive isotope is Cobalt⁶⁰.

4. The method of claim 1 in which the art object includes a significant portion of cellulose.

5. The method of claim 4 in which the resin is an unsaturated resin which will graft-polymerize to cellulose.

6. The method of claim 5 in which the unsaturated resin is an unsaturated polyester.