Abstract:
A PROCESS FOR BONDING BY RADIATION A SUBSTRATE, AND ESPECIALLY ONE HAVING A METALLIC SURFACE, WITH A SUBSTANTIALLY CATALYST-FREE SYSTEM CONTAINING A POLYMERIZABLE ORGANIC UNSATURATED RESIN SUSCEPTIBLE TO FREE-RADICAL CATALYSIS; AND THE RESULTING PRODUCT. IN ONE FORM, A FILM OF THE RESIN IS SUPERIMPOSED UPON THE SUBSTRATE WHILE A FACING SIDE OF EITHER THE RESINOUS FILM OR SUBSTRATE IS CONTACTED AT ANY TIME PRIOR TO SUCH RADIATION WITH AN ORGANIC SUBSTITUTED, RADIATION-RESPONSIVE ESTER OF A METAL ACID, SUCH AS TITANIC ACID OR ZIRCONIC ACID. THEREAFTER, THE FILM AND SUBSTRATE ARE SUBJECTED TO THE HIGH ENERGY RADIATION TO ADHERE ONE TO THE OTHER. IN ANOTHER FORM, NORMALLY AIRINHIBITED, THERMOSETTING RESINS ARE BONDED TO SUBSTRATES BY A TWO-STEP PROCESS, WHEREIN THE RESIN FILM IS FIRST PASSED THROUGH ONE TREATING ZONE EFFECTIVE TO IMPART MASS INTEGRITY AND THEREBY DEFINE A SHEET, AND THE SHEET TOGETHER WITH THE METAL ESTER AND THE SUBSTRATE IS THEN PASSED THROUGH ANOTHER TREATING ZONE EFFECTIVE SUBSTANTIALLY TO COMPLETE THE CURE OF THE RESIN AND SIMULTANEOUSLY ADHERE THE SHEET TO THE SUBSTRATE, AT LEAST ONE OF THE TREATING ZONES COMPRISING EXPOSURE TO HIGH ENERGY RADIATION.
Abstract:
A process for coating by radiation a substrate, and especially one having a metallic surface, with a substantially catalyst-free system containing a polymerizable organic unsaturated resin susceptible to free-radical catalysis; and the resulting product. In one form, a film of the resin is superimposed upon the substrate while a facing side of either the resinous film or substrate is contacted at any time prior to such radiation with a selected chromium Werner complex. The Werner complex has a polar moiety attractive to the substrate and an organic unsaturated moiety which is sufficiently responsive to high energy radiation to react chemically with the resin. Thereafter, the film and substrate are subjected to the high energy radiation to adhere one to the other. The process is also adapted for coating articles with normally air-inhibited, thermosetting resins by a two-step process, wherein the resin film is first passed through one treating zone effective to impart mass integrity and thereby define a sheet, and the sheet together with the Werner complex and the substrate is then passed through another treating zone effective substantially to complete the cure of the resin and simultaneously adhere the sheet to the substrate, at least one of the treating zones comprising exposure to high energy radiation.
Abstract:
A PROCESS FOR COATING BY RADIATION A SUBSTRATE, AND ESPECIALLY ONE HAVING A METALLIC SURFACE, WITH A SUBSTANTIALLY CATALYST-FREE SYSTEM CONTAINING A POLYMERIZABLE ORGANIC UNSATURATED RESIN SUSCEPTIBLE TO FREE-RADICAL CATALYSIS; AND THE RESULTING PRODUCT. IN ONE FORM, A FILM OF THE RESIN IS SUPERIMPOSED UPON THE SUBSTRATE WHILE A FACING SIDE OF EITHER THE RESINOUS FILM OR SUBSTRATE IS CONTACTED AT ANY TIME PRIOR TO SUCH RADIATION WITH AN ORGANIC SUBSTITUTED, RADIATION-RESPONSIVE SILANE, OR DERIVATIVE THEREOF SUCH AS A SILOXANE OR POLYSILOXANE OF THE SILANE. THEREAFTER, THE FILM AND SUBSTRATE ARE SUBJECTED TO THE HIGH ENERGY RADIATION TO ADHERE TO THE OTHER. THE PROCESS IS ALSO ADAPTED FOR COATING ARTICLES WITH NORMALLY AIR-INHIBITED, THERMOSETTING RESINS BY A TWO-STEP PROCESS, WHEREIN THE RESIN FILM IS FIRST PASSED THROUGH ONE TREATING ZONE EFFECTIVE TO IMPART MASS INTEGRITY AND THEREBY DEFINE A SHEET, AND THE SHEET TOGETHER WITH THE SILANE AND THE SUBSTRATE IS THEN PASSED THROUGH ANOTHER TREATING ZONE EFFECTIVE SUBSTANTIALLY TO COMPLETE THE CURE OF THE RESIN AND SIMULTANEOUSLY ADHERE THE SHEET TO THE SUBSTRATE, AT LEAST ONE OF THE TREATING ZONES COMPRISING EXPOSURE TO HIGH ENERGY RADIATION.
Abstract:
A PROCESS FOR COATING BY RADIATION A SUBSTRATE, AND ESPECIALLY ONE HAVING A METALLIC SURFACE, WITH A SUBSTANTIALLY CATALYST-FREE SYSTEM CONTAINING A POLYMERIZABLE ORGANIC UNSATURATED RESIN SUSCEPTIBLE TO FREE-RADICAL CATALYSIS; AND THE RESULTING PRODUCT. IN ONE FORM, A FILM OF THE RESIN IS SUPERIMPOSED UPON THE SUBSTRATE WHILE A FACING SIDE OF EITHER THE RESINOUS FILM OR SUBSTRATE IS CONTACTED AT ANY TIME PRIOR TO SUCH RADIATION WITH AN ACID POLYMER-FORMING MATERIAL HAVING A MINERAL ACID GROUP SELECTED FROM THE CLASS CONSISTING OF OXYGENATED SULFURCONTAINING AND OXYGENATED PHOSPHORUS-CONTAINING GROUPS WHICH ARE ATTRACTIVE TO THE SUBSTRATE, AND AN ORGANIC UNSATURATED MOIETY WHICH IS SUFFICIENTLY RESPONSIVE TO HIGH ENERGY RADIATION TO REACT CHEMICALLY WITH THE FILM OF THE COATING RESIN. THEREAFTER, THE FILM AND SUBSTRATE ARE SUBJECTED TO THE HIGH ENERGY RADIATION TO ADHERE ONE TO THE OTHER. THE PROCESS IS ALSO ADAPTED FOR COATING ARTICLES WITH NORMALLY AIR-INHIBITED, THERMOSETTING RESINS BY A TWO-STEP PROCESS, WHEREIN THE RESIN FILM IS FIRST PASSED THROUGH ONE TREATING ZONE EFFECTIVE TO IMPART MASS INTERGRITY AND THEREBY DEFINE A SHEET, AND THE SHEET TOGERTHER WITH THE ACID POLYMER-FORMING MATERIAL AND THE SUBSTRATE IS THEN PASSED THROUGH ANOTHER TREATING ZONE EFFECTIVE SUBSTANTIALLY TO COMPLETE THE CURE OF THE RESIN AND SIMULTANEOUSLY ADHERE THE SHEET TO THE SUBSTRATE, AT LEAST ONE OF THE TREATING ZONES COMPRISING EXPOSURE TO HIGH ENERGY RADIATION.
Abstract:
An improved process for curing an unsaturated air-inhibited thermosetting resin with a vinyl compound copolymerizable therewith suitably by means of radiation with a beam from electron emitting means wherein curling occurs by the addition of unsaturated molecules one to another is described. The improvement is for reducing inhibition of the resin to surface cure and comprises: substituting for at least a fraction of the unsaturated inhibited resin a copolymer comprising a linear saturated backbone having pendant therefrom through linkage selected from the group consisting of ester, ether, urethane, amine, and amide, a plurality of ethylenically unsaturated groups capable of the addition. The copolymer is characterized in having an average molecular weight of between about 5,000 and about 225,000.
Abstract:
Methods are disclosed for rapidly curing compositions containing acrylyl terminated prepolymers and unsaturated diluents with melamine acrylate cross-linking agents by exposure to actinic radiation. The compositions also contain a polymerization initiator which is sensitive to the radiation employed.
Abstract:
A process for preparing a laminable sheet from a substantially catalyst-free system containing a polymerizable organic unsaturated resin susceptible to free-radical one comprising assembling a film or the like of the resin in contacting substantially coplanar relation with a membrane, and then exposing the resulting assembly while overlying a substrate to high energy radiation. This action cures a depthwise segment of the assembly contiguous to the substrate and provides a nontacky, mar-resistant undersurface to the film while leaving at least the upper exposed surface of the assembly in a relatively tacky, mar-susceptible condition. The latter surface thereby defines an interface of a resulting laminable sheet adapted for subsequent adherence to another lamina. Preferably, the process includes the ultimate step of lamination as well. In this embodiment, the described assembly is first passed through onm treating zone effective to impart mass integrity and thereby define a sheet, and is then passed in juxtaposition with a cooperating lamina through another treating zone effective substantially to complete the cure of the resin and simultaneously laminate the sheet to the cooperating lamina, one of the treating zones comprising exposure to high energy radiation.
Abstract:
A process for curing a normally air-inhibited, thermosetting resinous reaction product comprising exposing a film or coat of the resin while overlying a substrate to high-energy radiation to cure at least a depthwise segment of the film that is contiguous to the substrate to provide a nontacky, mar-resistant undersurface to the film, then inverting the film on a substrate, and again exposing the inverted film to high energy radiation or to heat. Electron emission, microwaves, ultraviolet light, and the like may be used as the high-energy radiation. As a modification, the resin film or coat may be stretched prior to completing the second exposure. As a further modification, the resin film may be laminated to a substrate during the second exposure, preferably with an adhesive curable by exposure to such high energy radiation.