Organic fluorine-silicon light-cured resin and preparation method therefor and application thereof

Abstract

The invention relates to organic fluorine-silicon light-cured resin, the molecular weight of the organic fluorine-silicon light-cured resin is 2000-15000. The organic fluorine-silicon light-cured resin is prepared by the following steps: S1, putting hydroxylalkyl polysiloxane, diisocyanate and a catalyst in a reaction container, heating and stirring the mixture under nitrogen protection to 30-60 DEG C, and insulating the mixture to react for 1.0-3.0 hours; and S2, adding fluorocarbon resin into a polysiloxane prepolymer obtained in the S1 at 30-65 DEG C, and insulating the mixture to react for 1.0-5.0 hours; and then adding hydroxyl acrylate and a polymerization inhibitor and insulating the mixture to react for 1.0-5.0 hours to prepare the organic fluorine-silicon light-cured resin, wherein the dosage ratio of hydroxylalkyl polysiloxane and fluorocarbon resin is 0.1-2, and hydroxylalkyl polysiloxane has the structure shown in the formula, wherein the formula is shown in the description; the group R is -CH2OH, -CH2CH2OCH2OH, -CH2CH2CH2OCH2OH, -CH2CH2CH2OH or -CH2CH2CH2CH2OH and n is an integer from 0 to 100; the dosage of diisocyanate accounts for 10-30% of all components in total mass; the dosage of the hydroxyl acrylate accounts for 10-30% of all components in total mass.

Description

technical field [0001] The invention relates to the field of photocuring technology, in particular to an organic fluorosilicon photocurable resin and its preparation method and application. Background technique [0002] Fluorocarbon resin has the characteristics of super weather resistance, acid and alkali resistance, and stain resistance. The self-cleaning effect of carbon resin is poor; silicone resin has low surface tension, after it is applied to fluorocarbon resin, it may be able to improve the self-cleaning effect and stain resistance of fluorocarbon resin; but currently commercially available The method of organic silicon modification of fluorocarbon resin mostly adopts the method of simply adding coupling agent, but the force between the added silane coupling agent and fluorocarbon resin is small, and the effect of improving the performance of fluorocarbon resin is poor . [0003] Chinese patent CN201410059916.4 discloses a silicone-modified fluorocarbon resin, whi...

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Problems solved by technology

[0002] Fluorocarbon resin has the characteristics of super weather resistance, acid and alkali resistance, and stain resistance. The self-cleaning effect of carbon resin is poor; silicone resin has low surface tension, after it is applied to fluorocarbon resin, it may be able to improve the self-cleaning effect and stain resistance of fluorocarbon resin; but currently commercially available The method of organic silicon modification of fluorocarbon resin mostly adopts the method of simply adding coupling agent, but the force between the added silane coupling agent and fluorocarbon resin is small, and the effect of improving the performance of fluorocarbon resin is poor

[0003] Chinese patent CN201410059916.4 discloses a silicone-modified fluorocarbon resin, which is composed of mixed fluorine monomers, silane coupling agents, acicular silicates, enesters, unsaturated olefinic acids, ketones, initiators ( Azobisisobutyronitrile) and other components, which first prepare fluorocarbon resin, and then connect acicular silicate and fluorocarbon resin through a silane coupling agent. This patent mainly focuses on the transparency, Hardness, chemical resistance and aging resistance, etc., but the interaction between the silicate and silane coupling agent in this patent and the fluorocarbon resin is weak, which affects the aging resistance and wiping resistance of the fluorocarbon resin. The degree of improvement is small; Chinese patent CN201410099255.8 provides a method for preparing a modified trifluoro-type FEVE fluorocarbon coating, by hydrolyzing the alkoxy groups in the silane coupling agent KH-570 into hydroxyl groups and hydroxyl groups on the surface Nano-silica condenses to form a covalent bond, which causes chemical bonding between nano-silica and polystyrene molecules, so that polystyrene is coated on the surface of nano-silica to form a core-shell structure, increasing its resistance to organic solvents. Dispersion in the medium; then the modified nano-silica is added to the trifluoro-type FEVE resin to make a composite fluorocarbon coating to improve the adhesion, UV resistance, acid and alkali resistance of the fluorocarbon coating, The purpose of stain resistance and corrosion resistance; however, the technical route used in the invention is complicated, and the patent does not study its impact on the aging resistance or wipe resistance of fluorocarbon resins

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