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A light-cured waterproof coating for polymer base material and preparation method thereof

A waterproof coating, polymer-based technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problem of light-cured coatings not being resistant to twists and turns, etc.

Active Publication Date: 2018-05-04
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first technical problem to be solved by the present invention is to provide a light-cured waterproof coating suitable for the surface treatment of polymer substrates, so as to solve the defects of existing light-cured coatings such as intolerant to twists and turns and waterproof performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of polyurethane-modified acrylate photocurable resin: Take 50 parts by weight of toluene and 100 parts by weight of low-molecular-weight polypropylene glycol into a reaction bottle, 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 were 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 (see patent CN2015102217864 for details).

[0030] Preparation method of light-cured waterproof coating for polymer substrate surface treatment

Embodiment 2

[0032] Take 49g of polyurethane-modified acrylate photocurable resin and 45g of waterproof fluorocarbon functional diluent (including 10g of hexafluorobutyl acrylate, 2g of trifluorooctyl methacrylate, 12g of hexafluorobutyl methacrylate, methacrylic acid Dodecafluoroheptyl 9g, trifluoroethyl methacrylate 12g), photosensitive cross-linking diluent 5g (ethylene glycol dimethacrylate 2g, polyethylene glycol dimethacrylate 3g) into the reaction kettle , stirring until well combined. Slowly add 1 g of photoinitiator 1-hydroxycyclohexyl phenyl ketone under stirring, stir well and seal to obtain photocurable coating 1. After being coated on PVC and other polymer substrates, it was found that the coating can meet the requirements of bending resistance and waterproof performance: no white marks under heavy pressure, the paint film does not fall off after 300 frictions, and there is basically no crease after bending 20 times. The waterproof rating is level 5, with obvious "lotus leaf ...

Embodiment 3

[0034] Take 56g of polyurethane-modified acrylate photocurable resin and 30g of waterproof fluorocarbon functional thinner (10g of hexafluorobutyl acrylate, 5g of trifluorooctyl methacrylate, 10g of hexafluorobutyl methacrylate, 10g of methacrylic acid Dodecafluoroheptyl 5g), photosensitive cross-linking diluent 10g (wherein triethylene glycol dimethacrylate 3g, polyethylene glycol dimethacrylate 5g, pentaerythritol trimethacrylic acid value 2g) drop into reactor In, stir until well combined. Slowly add 4g of photoinitiator (1-hydroxycyclohexyl phenyl ketone 2g, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide 2g) under stirring, stir well and seal to obtain photocurable coating 2 . It is found that the coating can meet the requirements of bending resistance and waterproof performance after being coated on PVC and other polymer substrates on the machine: no white mark under heavy pressure, no peeling off of the paint film after 300 times of friction, no crease after 20 times of...

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Abstract

The invention relates to the technical field of polymer materials and requires to protect a light-cured waterproof coating for a polymer substrate. The light-cured waterproof coating comprises the following components in percentage by weight: 49-75% of photosensitive resin, 5-45% of a waterproof fluorocarbon functional diluent, 5-20% of a photosensitive corsslinked diluent, 1-6% of a photoinitiator and 0-8% of matting powder. The light-cured waterproof coating for the polymer substrate is used for solving the problem for coating the existing light-cured coating on the surface of the polymer substrate, and the obtained coating has no white marks after being heavily pressed, no paint film falling after being rubbed for 300 times and no folding marks after being bent for 20 times, and the waterproof effect of the coating meets the industrial requirement.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to the technical field of synthesis of waterproof photocurable coatings, in particular to a photocurable waterproof coating suitable for surface treatment of polymer substrates and a preparation method thereof. Background technique [0002] Light-curing coatings, also known as photosensitive coatings, use ultraviolet light as the energy source for coating curing, also known as UV-curing coatings, which can quickly cure and form films on flammable substrates such as paper, plastic, leather and wood without heating. It is mainly composed of photosensitive resin, photosensitizer (photoinitiator) and diluent, and some additives such as heat stabilizer are added at the same time, and pigments and fillers are added when preparing color paint. [0003] Traditional coating curing usually removes the solvent in the polymer solution by heating, that is, physical drying, to obtain a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D7/61C08J7/04C08L27/06C08L23/06C08L23/12C08L67/02C08L25/06
CPCC08J7/0427C08J2323/06C08J2323/12C08J2325/06C08J2327/06C08J2367/02C08J2475/14C08K3/36C08K2201/011C09D7/61C09D7/63C09D7/65C09D175/14C08L33/26C08K3/34C08K5/098
Inventor 陈奠宇邓昭逸范新传周国威
Owner CHANGSHU INSTITUTE OF TECHNOLOGY