专利名称：Turquoi-plastic-composite 发明人：Homer Breault,Alvin E. Witt
申请号：US05/648842四级考试评分标准
aimless>文件箱申请日：19760114
公开号：US04075365A
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infectionutilities公开日：
sick
bazoo
19780221
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摘要：A turquoi is impregnated with a monomeric diester having two spaced apart polymerizable monoolefinic groups, said diester having a plurality of supplemental hydrophillic groups and a volatility corresponding to a boiling point within a range from about 150° C to about 300° C. Whatever moisture may be sorbed on the turquoi is encapsulated within the plastic during the in-situ polymerization, inasmuch as such sorbed moisture can associate with such supplemental hydrophillic groups having an affinity for water. The dimethacrylate ester of triethylene glycol has two supplemental ether groups which tend to have affinity for water. Thus the monomer is sorbed on surfaces displacing any sorbed moisture in the internal pores or fissures in the turquoi, whereby the impregnation of the turquoi is feasible without critical control of vacuum drying and/or related preparatory steps. Thus one overcomes prior difficulties connected with drying the turquoi, evacuating the turquoi, preconditioning the turquoi in a warm water bath and the multi-stage treatment for polymerization. The diester thus impregnated into the turquoi can be adequately polymerized to a weather resistant composite by catalytic, thermal, or radiation initiation of the polymerization. The heat of polymerization is so small that gems are not impaired thereby.
申请人：ATLANTIC RICHFIELD COMPANY
sofo代理人：John R. Ewbank 更多信息请下载全文后查看
