发明授权
US5567438A Shellac dispersions and coatings, and method of forming aqueous-based
shellac dispersions and coatings
失效
紫胶分散体和涂料，以及形成水性紫胶分散体和涂料的方法
- 专利标题： Shellac dispersions and coatings, and method of forming aqueous-based shellac dispersions and coatings
- 专利标题（中）： 紫胶分散体和涂料，以及形成水性紫胶分散体和涂料的方法
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申请号： US541227申请日： 1995-10-12
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公开(公告)号： US5567438A公开(公告)日： 1996-10-22
- 发明人: Richard B. Cook
- 申请人： Richard B. Cook
- 申请人地址： MA Bedford
- 专利权人： Opta Food Ingredients, Inc.
- 当前专利权人： Opta Food Ingredients, Inc.
- 当前专利权人地址： MA Bedford
- 主分类号： A21D13/00
- IPC分类号： A21D13/00 ; A21D13/08 ; A23G3/34 ; A23L1/00 ; A61K9/28 ; A61K9/30 ; C09D193/02
摘要：
A method of forming the aqueous-based shellac dispersion includes dissolving a shellac solution in a basic aqueous solvent to form a shellac solution and subsequently combining the shellac solution with an acidic aqueous solution, whereby the shellac precipitates to form the aqueous-based shellac dispersion. A film can be formed by applying the shellac dispersion to a suitable surface and exposing the dispersion to conditions which cause a substantial portion of the shellac particles in the dispersion to fuse, thereby forming a shellac film on the surface. The shellac film does not include any organic solvent for the shellac or any amine-containing shellac salt. A plasticizer can be employed to form a continuous shellac coating on a substrate at significantly reduced temperatures.