公开(公告)号：US20060025562A1

公开(公告)日：2006-02-02

申请号：US11110051

申请日：2005-04-20

申请人： Robert Dion ,  Brian Jazdzewski ,  Francis Timmers ,  Keith Watson ,  Paul Vosejpka

发明人： Robert Dion ,  Brian Jazdzewski ,  Francis Timmers ,  Keith Watson ,  Paul Vosejpka

IPC分类号： C08G63/87

CPC分类号： C08G63/85 ,  C08G63/181 ,  C08G2650/34

摘要： Cyclic oligomers containing ester linkages are polymerized in the presence of a catalyst having at least one oxygen atom bonded to two metal atoms. At least one of the metal atoms is a tin atom, which is preferably tetravalent, i.e., bonded to three other groups in addition to the oxygen atom. The other metal atom may also be another tin atom, which is again preferably tetravalent, or a zinc, aluminum or titanium atom. The catalyst may contain multiple oxygen atoms that are bonded to two such metal atoms as described. These catalysts are active, efficient polymerization catalysts. They are often liquids at polymerization temperatures. The catalysts can be formed in situ in the polymerization process, which provides additional flexibility in the process and increased storage stability of starting materials.

摘要翻译： 含有酯键的环状低聚物在具有键合至两个金属原子的至少一个氧原子的催化剂存在下聚合。 至少一个金属原子是锡原子，其优选是四价的，即除了氧原子之外还与三个其它基团键合。 另一个金属原子也可以是另一个锡原子，其又优选为四价，或者是锌，铝或钛原子。 催化剂可以含有多个氧原子，其与所述的两个这样的金属原子键合。 这些催化剂是活性的，有效的聚合催化剂。 它们在聚合温度下通常是液体。 催化剂可以在聚合过程中原位形成，这在工艺中提供了额外的灵活性并提高了原料的储存稳定性。