|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||521/79 ; 521/97 ; 521/146|
|§371/§102 date||19960312 (19960312)|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 5|
Disclosed is a foam structure of desirable mechanical strength made with a low molecular weight alkenyl aromatic polymer material and an inorganic blowing agent. The polymer material has an alkenyl aromatic polymer of a weight average molecular weight of 100,000 to 165,000. The foam structure can be made in processes with reduced pressure drop.
A process for making an extruded alkenyl aromatic polymer foam structure having a cross-section thickness in minor dimension of greater than 9.5 millimeters and a cross-section of 30 square centimeters or more, comprising: a) heating to form a melt polymer material an alkenyl aromatic polymer material comprising greater than 50 percent by weight alkenyl aromatic monomeric units and further comprising a weight average molecular weight of 125,000 to to 145,000 and a polydispersity index of 2.05 to 3.0; b) incorporating into the melt polymer material at an...