|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||521/131 ; 252/67 ; 252/69 ; 252/18224|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 15 인용 특허 : 2|
Disclosed are mixed halocarbon blowing agents comprising (1) halocarbons boiling below about 10°C., (2) halocarbons boiling between 20°C. and 35°C., and (3) inert organic liquids having a boiling point from about 35°C. to about 125°C. Also disclossed are blends of the above mixed blowing agents with active hydrogen containing compounds, particularly polyols and the rigid closed cell foams prepared from such blends. Up to 60 percent reduction in hard halocarbons is realized with the mixed blowing agents.
A mixed blowing agent comprising: (1) from about 2 to about 25 percent by weight of at least one halocarbon blowing agent having a boiling point below about 10°C.; (2) from about 30 to about 90 percent by weight of at least one halocarbon blowing agent having a boiling point of from about 20°C. to about 35°C.; and (3) from about 8 to about 45 percent by weight of an inert organic liquid having a boiling point from about 35°C. to about 125°C., and provided at least one of said components (1), (2), or (3) contains at least one hydrogen atom.