This invention concerns a process for modifying a polymeric substrate by contacting the surface with a photoreactive solution of an inorganic photochemical electron donor while irradiating the surface with actinic radiation. Patterns of modified and unmodified surfaces can be produced. Polymeric substrates with modified surfaces may be effectively bonded to polymer films to form composite articles. The process has particular applicability to the surface modification of fluorinated polymers.
Method of modifying a fluoropolymer and articles thereby
申请人:3M Innovative Properties Company
公开号:EP2014703A1
公开(公告)日:2009-01-14
The present invention provides a method of preparing a composite article comprising:
providing a first substrate having a surface comprising fluoropolymer;
contacting the surface of the first substrate with a modifying composition preparable from components comprising a phase transfer catalyst, at least one of a sulfide or polysulfide salt or anionic conjugate acid thereof, and a liquid vehicle, wherein the fluoropolymer has a backbone comprising subunits having the structure -CH2CFX-, wherein X represents H, Cl, or F; and bonding the first substrate to a second substrate to provide a composite article, wherein the method is carried out in the substantial absence of actinic radiation.