|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||521/079; 521/098; 521/142; 521/146|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 1 인용 특허 : 84|
A blowing agent blend for making thermoplastic polymer foams includes methyl formate. The blowing agent blend can further comprise at least one co-blowing agent. The co-blowing agent 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. The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend includes me...
1. A process for producing a thermoplastic polymer foam sheet comprising: preparing an expandable polymeric formulation comprising a thermoplastic polymer and a blowing agent blend comprising methyl formate, hydrocarbon, and carbon dioxide, the blowing agent blend comprising about 6 to about 53 weight percent of the methyl formate; andexpanding the formulation to form a substantially closed-cell, dimensionally stable, thermoformable foam sheet that is substantially free of a gas barrier resin. 2. The process of claim 1, wherein preparing the expandable p...