Fixing and protecting agent for fragile organic cultural relics unearthed at archaeological site and preparation method thereof

Abstract

The invention discloses a fixing and protecting agent for fragile organic cultural relics unearthed at the archaeological site and a preparation method thereof. The fixing and protecting agent is prepared from 32-36 parts by mass of polyester diol, 22-28 parts by mass of polyether polyol, 22-28 parts by mass of diisocyanate, 0.5-0.7 part by mass of stannous octoate and 13-15 parts by mass of dibutyl ester. The preparation method of the fixing and protecting agent comprises the following steps of: mixing polyester diol and polyether polyol in proportion, and dehydrating the mixture of polyester diol and polyether polyol for later use; adding dried polyether polyol, dried polyester diol and stannous octoate into a four-neck flask which is provided with a stirrer, a thermometer, a dropping funnel and a reflux condenser, stirring, and preheating to a temperature of 40-55 DEG C; dropwise adding diisocyanate into the four-neck flask by stirring, heating the four-neck flask to a temperature of 65-70 DEG C, enabling the materials in the four-neck flask to react for 1.5-3 hours, sealing the four-neck flask, and preserving to obtain the fixing and protecting agent. The fixing and protecting agent disclosed by the invention is sprayed out to fix the fragile organic cultural relics, and the fixed fragile organic cultural relics have good toughness, can resist sunshine and can be kept stable for a long time.

Description

technical field [0001] The invention relates to cultural relics protection materials, in particular to an archaeological scene fragile organic matter cultural relics shaped protection agent and a preparation method thereof. Background technique [0002] The damage to fragile organic cultural relics unearthed at archaeological excavation sites due to environmental mutations such as sudden increase in oxygen content, sudden changes in humidity, light radiation, and harmful microorganisms is multifaceted, common, serious, and sometimes even devastating. Archaeologists use methods such as stable treatment of fragile organic cultural relics at the archaeological excavation site, environmental control, collection of cultural relics, etc., so that the unearthed cultural relics can be scientifically and effectively protected in a timely manner at the excavation site, and the various information carried by the cultural relics themselves can be maximized. save. For extremely fragile ...

AI Technical Summary

Problems solved by technology

The bamboos found in Tomb No. M1 of the Zhang Anshi family ancient tomb in the Western Han Dynasty are completely ash-ashed organic matter, and their stability is very poor. Although 99% of their shapes are well preserved, they are actually very fragile. Turning into a pile of ashes, shaping and strengthening its original shape is the most important step in a series of protection work for the protection of this batch of cultural relics. Therefore, in order to better protect the cultural relics, it is necessary to use suitable reinforcement materials to shape them.