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UV (ultraviolet) photocuring waterproof coating and preparation method thereof

A waterproof coating, light-curing technology, used in coatings, paper coatings, water repellent additions, etc.

Inactive Publication Date: 2016-10-12
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a UV light-cured waterproof coating suitable for paper surface treatment, which solves the problems of paper water resistance, flex resistance, wear resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] For the preparation method of polyurethane-modified acrylate photosensitive, see patent CN2015102217864 for details.

[0025] Example 1 Take 50 parts by weight of toluene and 100 parts by weight of low-molecular-weight polypropylene glycol into a reaction flask, heat up to 110° C. for reflux dehydration for 2 hrs; add a small amount of catalyst, and stir until the mixture is uniform. Under the condition of maintaining the temperature at 80° C., 33 parts by weight of hexamethylene diisocyanate was slowly added dropwise and reacted for 2 hrs. Add a polymerization inhibitor, then add 21 parts by weight of methacryloyl chloride dropwise, and react for 1.5 hrs to obtain a polyurethane-modified acrylate photocurable resin.

[0026] Preparation method of light-cured waterproof coating for paper surface treatment

Embodiment 2

[0028] Take 30g of polyurethane-modified acrylate photocurable resin and 20g of waterproof fluorocarbon functional diluent (5g of hexafluorobutyl acrylate, 5g of trifluorooctyl methacrylate, 7g of dodecafluoroheptyl methacrylate, methyl Trifluoroethyl acrylate 3g), acrylic resin AP-6250 40g, photosensitive crosslinking diluent 4g (ethylene glycol dimethacrylate 2g, polyethylene glycol dimethacrylate 2g) drop in the reaction kettle, stir until well mixed. Slowly add 6 g of photoinitiator 1-hydroxycyclohexyl phenyl ketone under stirring, stir well and seal to obtain photocurable coating 1. It is found that the coating can meet the requirements of bending resistance, abrasion resistance and waterproof performance after being coated on the double-sided coated paper substrate on the machine: the paint film does not fall off after 100 times of disc friction, and there is no crease after bending 20 times. It is level 5, with negative water drops and no water marks for 72 hours.

Embodiment 3

[0030] Take 35g of polyurethane-modified acrylate photocurable resin and 15g of waterproof fluorocarbon functional diluent (5g of hexafluorobutyl acrylate, 2g of trifluorooctyl methacrylate, 6g of hexafluorobutyl methacrylate, methacrylic acid Dodecafluoroheptyl 2g), acrylic resin AP-6250 35g, photosensitive cross-linking diluent 10g (of which triethylene glycol dimethacrylate 3g, polyethylene glycol dimethacrylate 5g, pentaerythritol trimethyl Acrylic acid value 2g) is put into the reaction kettle, stir until mixing evenly. Slowly add 5g of photoinitiator (2g of 1-hydroxycyclohexyl phenyl ketone, 2g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide) under stirring, stir well and seal to obtain photocurable coating 2 . It is found that the coating can meet the requirements of bending resistance, abrasion resistance and waterproof performance after being coated on the double-sided coated paper substrate on the machine: the paint film does not fall off after 100 times of disc f...

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PUM

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Abstract

The invention discloses a UV photocuring waterproof coating, which is obtained by mixing and prepolymerizing the following components according to weight percentage: 30-70% of polyurethane modified acrylate photocuring resin, 7-70% of waterproof fluorocarbon functional diluent 20%, flexible acrylic resin 15‑40%, photosensitive crosslinking diluent 3‑10%, photoinitiator 1‑6%. The UV light-cured waterproof coating for paper surface treatment obtained in the present invention effectively solves the coating problem of the existing paper surface. The obtained coating does not fall off after being rubbed 100 times by a disc, and there is no crease when it is bent 20 times. , the waterproof level is level 5, and there is no water mark for 72 hours with negative water droplets. The product uses light curing technology to solve the coating problem on the surface of the paper, and brings practical benefits to the production of enterprises.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, specifically relates to the technical field of waterproof UV photocurable coating synthesis, in particular to a UV photocurable waterproof coating suitable for paper surface treatment and a preparation method thereof. Background technique [0002] As an important printing and packaging material, paper will inevitably encounter water immersion, oil seepage and other pollution problems during use. In recent years, paper oil repellents, sizing agents, and paper coatings have been used in research and production. Layering treatment etc. modify the surface of paper fibers to endow the paper with excellent water, oil, and antifouling properties. However, the related treatment coating is expensive, the construction process is complicated, and it also has the disadvantages of high energy consumption and serious pollution, which brings great troubles to the factory production an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/24D21H19/20D21H21/16
CPCD21H19/24D21H19/20D21H21/16
Inventor 陈奠宇范新传邓昭逸周国威张荣左晓兵周弟左明明耿飞胡昕
Owner CHANGSHU INSTITUTE OF TECHNOLOGY