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A preparation method of UV-curable water-based resin with adjustable functionality

A water-based resin, ultraviolet light technology, applied in the field of polymer materials, can solve the problems of single, single structure and performance, and achieve the effect of good wear resistance

Active Publication Date: 2021-05-18
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above technical problems, the present invention discloses a preparation method of a UV-curable water-based resin with adjustable functionality. The obtained resin structure includes a polyacrylate main chain and a water-based polyurethane acrylate side chain, wherein the polyacrylate By controlling the proportion of monomers in the synthesis process, the resin can have a higher glass transition temperature, so that the resin has better hardness and other properties, and at the same time, the polyurethane acrylate in the side chain can endow the resin with better flexibility and durability. Abrasiveness, realize the mutual balance of multiple properties of a resin, and solve the problems that traditional water-based resins mostly have a single structure and performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In the first step, add 20g solvent propylene glycol methyl ether acetate, 40g methyl methacrylate, 20g butyl methacrylate, 40g methyl acrylate, 10g butyl acrylate, 60g hydroxyethyl methacrylate in a 500mL three-necked flask, 30g of styrene, stirred evenly, added catalyst azobisisobutyronitrile, which accounts for 0.8% of the total mass of the monomer, heated to 67°C while stirring, and reacted for 3 hours to obtain polyacrylate segment ① with hydroxyl groups in the side chain. In the acrylate segment, the mass percent content of hydroxyethyl methacrylate is 30%.

[0050] In the second step, add 1mol of toluene diisocyanate (TDI) and 18g of solvent propylene glycol methyl ether acetate into a 1000mL three-necked flask, heat to 68°C, and add 0.5% of dibutyltin dilaurate to 0.5mol of 2,3-dihydroxypropionic acid, gradually added to the toluene diisocyanate (TDI) solution, continued to react for 2.5 hours after the drop, added 0.4% p-hydroxyanisole to 1mol of hydroxyethyl me...

Embodiment 2

[0055] The first step, in 500mL there-necked flask, add 20g solvent ethylene glycol butyl ether acetate, 40g butyl acrylate, 60g methyl methacrylate, 40 butyl methacrylate, 40g hydroxyethyl acrylate, 20g acrylonitrile, stir Evenly, add 1.0% of the catalyst benzoyl peroxide tert-butyl peroxide, stir and heat to 66°C, and react for 3 hours to obtain a polyacrylate segment with a hydroxyl group in the side chain ①, polyacrylate In the chain segment, the mass percent content of hydroxyethyl acrylate is 20%.

[0056] In the second step, add 1mol of dicyclohexylmethane diisocyanate (HMDI), 16g of solvent ethylene glycol butyl ether acetate into a 1000mL three-necked flask, heat to 66°C, and dibutyltin dilaurate by 0.4% of the total mass Add to 0.5mol of 2,2-dimethylolbutyric acid, gradually add to dicyclohexylmethane diisocyanate (HMDI) solution, continue to react for 2.5h after dripping, add 0.6% to 1mol of hydroxyethyl acrylate Add p-hydroxyanisole to the above reaction system, r...

Embodiment 3

[0061] The first step, add 20g solvent propylene glycol diacetate, 30g butyl methacrylate, 40g methyl acrylate, 40g hydroxypropyl methacrylate, 40g hydroxypropyl acrylate, 20g hydroxyethyl methacrylate in a 500mL three-necked flask , 10g styrene, 20g acrylamide, stir evenly, add benzoyl peroxide as a catalyst accounting for 0.8% of the total mass of the monomer, heat to 73°C while stirring, and react for 2.5h to obtain polyacrylate with hydroxyl groups in the side chain Segment ①, in the polyacrylate segment, the total mass percentage content of hydroxypropyl methacrylate, hydroxypropyl acrylate and hydroxyethyl methacrylate is 50%.

[0062] In the second step, add 1mol of phenylmethane diisocyanate (MDI) and 15g of solvent propylene glycol diacetate to a 1000mL three-necked flask, heat to 65°C, and add 0.6% of dibutyltin dilaurate to 0.5mol 2,4-dihydroxybutyric acid, gradually added to the phenylmethane diisocyanate (MDI) solution, continued to react for 2.5 h after the drop,...

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Abstract

The invention provides a method for preparing an ultraviolet-curable water-based resin with adjustable functionality, which comprises the following steps: synthesizing a polyacrylate segment with a hydroxyl group in the side chain; synthesizing a polyurethane acrylate segment with an -NCO group at one end , and the urethane acrylate segment contains a water-based carboxylic acid group; the resulting polyacrylate segment containing a hydroxyl group in the side chain reacts with a urethane acrylate segment having an -NCO group at one end to obtain a Water-based polyurethane acrylate-modified polyacrylate resin; neutralized by adding an alkali solution to obtain an anionic UV-curable water-based resin. By adopting the technical scheme of the present invention, one resin can realize the mutual balance of multiple properties, and the viscosity is low, water-soluble, no diluent is needed, and it is more environmentally friendly; the obtained resin side chain has multi-functionality, and the resin can be The degree of cross-linking has been greatly improved, and various properties of the cured film have been improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a preparation method of an ultraviolet-curable water-based resin with adjustable functionality. Background technique [0002] Ultraviolet (UV) curing technology is an environmentally friendly curing technology. After the liquid coating is irradiated by ultraviolet light, a photochemical reaction occurs, which causes polymerization and crosslinking, and makes the liquid coating become a solid film in a short time. Because it has It has the advantages of fast curing speed, less environmental pollution, automatic production, and suitable for use on heat-sensitive substrates. It is expected to replace traditional solvent-based coatings, adhesives, inks, etc. in industry, and has good application prospects in most fields. According to the photocuring mechanism, there are two types of free radical curing and cationic curing. The free radical photocuring system has the adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/62C08G18/67C08G18/34C08F220/20C08F220/14C08F220/18C08F212/08C08F220/44C08F220/56
Inventor 刘红波张武英张霞
Owner SHENZHEN POLYTECHNIC
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