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    • 1. 发明授权
    • Polystyrene having high degree of expandability, and formulation having
a highly-expandable polymer therein
    • 具有高扩展性的聚苯乙烯和其中具有高度可膨胀聚合物的制剂
    • US5115066A
    • 1992-05-19
    • US777869
    • 1991-10-15
    • Eugene K. ZimmermannBernhard WagnerWilliam E. VolzWilliam H. HarclerodeJohn V. WimanJohn C. Voss
    • Eugene K. ZimmermannBernhard WagnerWilliam E. VolzWilliam H. HarclerodeJohn V. WimanJohn C. Voss
    • C08J9/06C08J9/12C08J9/14C08J9/16
    • C08J9/16C08J9/06C08J9/12C08J9/141C08J2325/06Y10S264/07Y10S264/09Y10S264/10Y10S264/15
    • A polystyrene polymer as well as an expandable polystyrene formulation comprises a polystyrene polymer having a particular molecular weight distribution. The polymer itself exhibits a polydispersity of from about 1 to less tha 2.0, a weight average molecular weight of greater than about 200,000 to about 300,000, and an M.sub.z :M.sub.n of from about 2 to less than about 3.0. Furthermore, the polystyrene polymer is branched to from 0 to less than 5 weight percent.The expandable polystyrene formulation comprises a polystyrene polymer exhibiting a polydispersity of from about 1.0 to less than 2.5, a weight average molecular weight of from greater than about 180,000 to about 300,000, an M.sub.z :M.sub.n of from about 2 to about 4.5. The polystyrene polymer is present in an amount of from about 94.5 weight percent to about 98 weight percent, based on the total weight of the formulation, and the polystyrene polymer is branched to from 0 to less than 5 weight percent. The formulation further comprises a blowing agent, wherein the blowing agent is present in an amount of from about 2 weight percent to less than 5.5 weight percent, wherein the blowing agent is a hydrocarbon which is gaseous or liquid at standard temperature and pressure, does not dissolve the styrene polymer, and boils below the softening point of the polymer.
    • 聚苯乙烯聚合物以及可发性聚苯乙烯制剂包含具有特定分子量分布的聚苯乙烯聚合物。 聚合物本身表现出多分散性为约1至小于2.0,重均分子量大于约200,000至约300,000,Mz:Mn为约2至小于约3.0。 此外,聚苯乙烯聚合物分支至0至小于5重量%。 可发性聚苯乙烯制剂包含显示约1.0至小于2.5的多分散性,大于约180,000至约300,000的重均分子量,约2至约4.5的Mz:Mn的聚苯乙烯聚合物。 基于制剂的总重量,聚苯乙烯聚合物的存在量为约94.5重量%至约98重量%,并且聚苯乙烯聚合物分支至0至小于5重量%。 制剂还包含发泡剂,其中发泡剂的存在量为约2重量%至小于5.5重量%,其中发泡剂是在标准温度和压力下为气态或液体的烃,不是 溶解苯乙烯聚合物,并且沸点低于聚合物的软化点。
    • 2. 发明授权
    • Polystyrene having high degree of expandability, and formulation having
a highly-expandable polymer therein
    • 具有高扩展性的聚苯乙烯和其中具有高度可膨胀聚合物的制剂
    • US5112875A
    • 1992-05-12
    • US617711
    • 1990-11-26
    • Eugene K. ZimmermannBernhard WagnerWilliam E. VolzWilliam H. HarclerodeJohn V. WimanJohn C. Voss
    • Eugene K. ZimmermannBernhard WagnerWilliam E. VolzWilliam H. HarclerodeJohn V. WimanJohn C. Voss
    • C08J9/06C08J9/12C08J9/14C08J9/16C08K5/00C08K5/01C08L25/06
    • C08J9/16C08J9/06C08J9/12C08J9/141C08J2325/06Y10S264/09Y10S521/907
    • A polystyrene polymer as well as an expandable polystyrene formulation comprises a polystyrene polymer having a particular molecular weight distribution. The polymer itself exhibits a polydispersity of from about 1 to less than 2.0, a weight average molecular weight of greater than about 200,000 to about 300,000, and an M.sub.z :M.sub.n of from about 2 to less than about 3.0. Furthermore, the polystyrene polymer is branched to from 0 to less than 5 weight percent.The expandable polystyrene formulation comprises a polystyrene polymer exhibiting a polydispersity of from about 1.0 to less than 2.5, a weight average molecular weight of from greater than about 180,000 to about 300,000, an M.sub.z :M.sub.n of from about 2 to about 4.5. The polystyrene polymer is present in an amount of from about 94.5 weight percent to about 98 weight percent, based on the total weight of the formulation, and the polystyrene polymer is branched to from 0 to less than 5 weight percent. The formulation further comprises a blowing agent, wherein the blowing agent is present in an amount of from about 2 weight percent to less than 5.5 weight percent, wherein the blowing agent is a hydrocarbon which is gaseous or liquid at standard temperature and pressure, does not dissolve the styrene polymer, and boils below the softening point of the polymer.
    • 聚苯乙烯聚合物以及可发性聚苯乙烯制剂包含具有特定分子量分布的聚苯乙烯聚合物。 聚合物本身表现出约1至小于2.0的多分散性,重均分子量大于约200,000至约300,000,Mz:Mn为约2至小于约3.0。 此外,聚苯乙烯聚合物分支至0至小于5重量%。 可发性聚苯乙烯制剂包含显示约1.0至小于2.5的多分散性,大于约180,000至约300,000的重均分子量,约2至约4.5的Mz:Mn的聚苯乙烯聚合物。 基于制剂的总重量,聚苯乙烯聚合物的存在量为约94.5重量%至约98重量%,并且聚苯乙烯聚合物分支至0至小于5重量%。 制剂还包含发泡剂,其中发泡剂的存在量为约2重量%至小于5.5重量%,其中发泡剂是在标准温度和压力下为气态或液体的烃,不是 溶解苯乙烯聚合物,并且沸点低于聚合物的软化点。