Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
Embodiments in accordance with the present invention provide waveguide structures and methods of forming such structures where core and laterally adjacent cladding regions are defined. Some embodiments of the present invention provide waveguide structures where core regions are collectively surrounded by laterally adjacent cladding regions and cladding layers and methods of forming such structures.
A cross-linked copolymer containing repeating units derived from dicyclopentadiene and metathesis polymerizable halogen-containing cycloalkenes, a process for producing the copolymer, a process for producing a molded article from the copolymer and a polymerizable composition therefor.
Process for producing a colored molded article of metathesis polymerized polymer
申请人:HERCULES INCORPORATED
公开号:EP0329063A2
公开(公告)日:1989-08-23
A process for producing a colored cross-linked molded article by metathesis polymerizing in a mold a mixture comprising metathesis polymerizable monomers such as dicyclopentadiene and a metathesis polymerizable multi-part composition therefor.
Compositions curable by ring opening metathesis polymerarization at low temperatures and their application in the dental field
申请人:3M Innovative Properties Company
公开号:EP1942125A1
公开(公告)日:2008-07-09
The invention relates to a composition which is polymerizable by ring-opening metathesis polymerization (ROMP) comprising at least one monomer that is polymerizable by ROMP, at least one initiator of the Hoveyda-Grubbs type for initiating the ROMP and at least one retarder selected from the group consisting of heterocyclic a means having a ring with at least one N-atom and five or less atoms constituting the ring bearing the at least one N-atom. The invention further relates to a process for the preparation of a composition which is polymerizable by ROMP, a dental material obtainable by polymerizing a composition according to the invention and the use of a substance selected from the group consisting of heterocyclic amines having a ring with at least one N-atom and five or less atoms constituting the ring bearing the at least one N-atom or of a mixture of two or more of such substances as a retarder in ROMP.
本发明涉及一种可通过开环偏聚聚合反应(ROMP)聚合的组合物,该组合物包含至少一种可通过ROMP聚合的单体、至少一种用于引发ROMP的Hoveyda-Grubbs型引发剂和至少一种选自具有至少一个N原子的环和五个或更少的原子构成具有至少一个N原子的环的杂环组成的组的缓凝剂。本发明还涉及一种可通过 ROMP 聚合的组合物的制备方法、一种可通过聚合根据本发明制备的组合物而获得的牙科材料,以及在 ROMP 中使用一种选自杂环胺的物质作为缓凝剂,该杂环胺具有至少一个 N 原子和五个或更少的原子组成的环,或两种或更多种此类物质的混合物。