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公开(公告)号：US20140174684A1
公开(公告)日：2014-06-26
申请号：US14192982
申请日：2014-02-28
Applicant: INTERNATIONAL PAPER COMPANY
Inventor： YAOLIANG HONG , KOSARAJU KRISHNA MOHAN , VICTORIA LAURENTIA DIMONIE , MARK FAGAN , ANDREW KLEIN , ERIC SCOTT DANIELS , BRIAN BOYARS , PETER M. FROASS , CHRISTOPHER D. ANDERSON , EDWARD DAVID SUDOL
Abstract: Expandable microspheres formed by suspension polymerization using a shot growth method are provided. The microspheres are formed of a continuous, gas impermeable shell surrounding a blowing agent. The shell includes a first polymer layer formed from primary monomers and a second layer that includes a chemically reactive monomer or a high Tg monomer. To form the microspheres, the primary monomers are polymerized in a reaction vessel to an approximate 90% polymerization, at which time a secondary monomer that is either a monomer having a Tg of at least 85° C. or a chemically reactive monomer, is added to the reaction vessel to drive the polymerization reaction to completion. The outer layer thus contains either a larger amount of the high Tg monomer or a chemically reactive monomer that possesses the ability to covalently bond a cationic species. The microspheres may be used in papermaking processes to increase the paper bulk.
Abstract translation: 提供了通过使用喷射生长法的悬浮聚合形成的可发泡微球。 微球由围绕发泡剂的连续不透气壳形成。 壳包括由初级单体形成的第一聚合物层和包含化学反应性单体或高Tg单体的第二层。 为了形成微球，将初级单体在反应容器中聚合至约90％的聚合，此时加入作为Tg至少为85℃的单体的二级单体或化学反应性单体 到反应容器中以驱动聚合反应完成。 因此，外层含有较大量的高Tg单体或具有共价键合阳离子物质的能力的化学反应性单体。 微球可用于造纸过程中以增加纸张体积。
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公开(公告)号：US20130146241A1
公开(公告)日：2013-06-13
申请号：US13761620
申请日：2013-02-07
Applicant: INTERNATIONAL PAPER COMPANY
Inventor： Yaoliang Hong , KOSARAJU KRISHNA MOHAN , VICTORIA LAURENTIA DIMONIE , MARK FAGAN , ANDREW KLEIN , ERIC SCOTT DANIELS , BRIAN BOYARS , PETER M. FROASS , CHRISTOPHER M. ANDERSON , EDWARD DAVID SUDOL
IPC: C08L33/20
Abstract: Expandable microspheres formed by suspension polymerization using a shot growth method are provided. The microspheres are formed of a continuous, gas impermeable shell surrounding a blowing agent. The shell includes a first polymer layer formed from primary monomers and a second layer that includes a chemically reactive monomer or a high Tg monomer. To form the microspheres, the primary monomers are polymerized in a reaction vessel to an approximate 90% polymerization, at which time a secondary monomer that is either a monomer having a Tg of at least 85° C. or a chemically reactive monomer, is added to the reaction vessel to drive the polymerization reaction to completion. The outer layer thus contains either a larger amount of the high Tg monomer or a chemically reactive monomer that possesses the ability to covalently bond a cationic species. The microspheres may be used in papermaking processes to increase the paper bulk.
Abstract translation: 提供了通过使用喷射生长法的悬浮聚合形成的可发泡微球。 微球由围绕发泡剂的连续不透气壳形成。 壳包括由初级单体形成的第一聚合物层和包含化学反应性单体或高Tg单体的第二层。 为了形成微球，将初级单体在反应容器中聚合至约90％的聚合，此时加入作为Tg至少为85℃的单体的二级单体或化学反应性单体 到反应容器中以驱动聚合反应完成。 因此，外层含有较大量的高Tg单体或具有共价键合阳离子物质的能力的化学反应性单体。 微球可用于造纸过程中以增加纸张体积。
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