|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||C08J-009/16 C08J-009/18 C08J-009/00 C08J-009/12|
|미국특허분류(USC)||521/087; 521/056; 521/060; 521/079; 521/082; 521/097; 521/098|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 7 인용 특허 : 78|
Expanded and extruded biodegradable polymer foams are obtained using biodegradable polymers and environmentally benign non-VOC methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC), which is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. T...
What is claimed is: 1. A process for producing a biodegradable polymer foam structure comprising: melting a biodegradable polymer; dissolving an effective amount of a blowing agent in the biodegradable polymer to define a mixture in a melt state, the blowing agent being a blend comprising from about 1 weight percent to about 99 weight percent methyl formate and 1,1,1,2-tetrafluoroethane (HFC-134a), wherein the mixture is maintained as a homogeneous solution in the melt state; forming an extrudate in the melt state from the mixture; and expanding the ext...