Method for curing and surface-functionalizing molded parts
First Claim
1. A method for curing and surface functionalization to produce surface-functionalized molded parts, comprising:
- processing at least one material ofa fiber reinforced polymer material,a sheet molding compound (SMC),a bulk molding compound (BMC), anda fiber-polymer-matrix part to form a molded part;
wherein the material is an unsaturated radically curable reactive resin system and further substances; and
during or after the processing of the at least one material to form the molded part,partially curing the material of the molded part to dimensional stability by cross-linking, which is thermally initiated, to form a partially-cured molded part; and
thensubjecting the partially-cured molded part to energetic electrons in an oxygen-containing atmosphere and with a dose application in at least two treatments to essentially completely cure at least a surface region of the partially-cured molded part, to generate oxygen-containing functional groups from the atmosphere on the surface and/or in regions close to the surface of the partially-cured molded part, and to increase hydrophilicity of the surface of the partially-cured molded part, thereby producing a surface-functionalized molded part;
wherein,after subjecting the partially-cured molded part to the energetic electrons in the oxygen-containing atmosphere to form the surface-functionalized molded part, gas emission from the surface of the surface-functionalized molded part, of any residual monomers, residual oligomers, or residual reactive thinning agents that remain, is virtually completely prevented, andno residual reactivity is detectable in the surface-functionalized molded part surface via differential scanning calorimetry (DSC) measurements.
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Abstract
A method for curing and surface functionalization of molded parts, including processing materials that contain at least one unsaturated radically or cationically curable reactive resin system and further substances to form a molded part and cross-linking the materials up to dimensional stability during or after the processing. The method additionally includes subjecting the molded part to energetic radiation or energetic particles at least one of during the cross-linking and subsequent to the cross-linking to essentially complete curing at least of a surface region of the molded part to produce an essentially completely coatable molded part surface.
33 Citations
19 Claims
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1. A method for curing and surface functionalization to produce surface-functionalized molded parts, comprising:
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processing at least one material of a fiber reinforced polymer material, a sheet molding compound (SMC), a bulk molding compound (BMC), and a fiber-polymer-matrix part to form a molded part;
wherein the material is an unsaturated radically curable reactive resin system and further substances; andduring or after the processing of the at least one material to form the molded part, partially curing the material of the molded part to dimensional stability by cross-linking, which is thermally initiated, to form a partially-cured molded part; and
thensubjecting the partially-cured molded part to energetic electrons in an oxygen-containing atmosphere and with a dose application in at least two treatments to essentially completely cure at least a surface region of the partially-cured molded part, to generate oxygen-containing functional groups from the atmosphere on the surface and/or in regions close to the surface of the partially-cured molded part, and to increase hydrophilicity of the surface of the partially-cured molded part, thereby producing a surface-functionalized molded part; wherein, after subjecting the partially-cured molded part to the energetic electrons in the oxygen-containing atmosphere to form the surface-functionalized molded part, gas emission from the surface of the surface-functionalized molded part, of any residual monomers, residual oligomers, or residual reactive thinning agents that remain, is virtually completely prevented, and no residual reactivity is detectable in the surface-functionalized molded part surface via differential scanning calorimetry (DSC) measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification