Metal water-based polishing oil and preparation method thereof

A water-based, varnish technology, applied in coatings, fire-resistant coatings, etc., can solve the problems of insufficient cooking resistance and wear resistance of varnish on the outside of cans, and achieve improved curing efficiency, good water resistance, and improved machining The effect of performance and wear resistance

Active Publication Date: 2018-09-28
清远慧谷新材料技术有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0003] Aiming at the problem of insufficient cooking resistance and abrasion resistance of existing pop...
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Abstract

The invention discloses metal water-based polishing oil, and aims to overcome the shortcoming of poor boiling resistance and abrasion resistance of outer polishing oil of an existing beverage can. Themetal water-based polishing oil comprises, by weight, 40-60 parts of polyester modified water-based acrylic resin, 5-20 parts of liquid petroleum resin, 5-15 parts of amine resin, 2-8 parts of blocked isocyanate, 0.1-0.5 part of organic acid catalysts, 5-15 parts of co-solvents and 10-20 parts of water. The invention further discloses a preparation method of the metal water-based polishing oil. The metal water-based polishing oil has excellent high-temperature boiling resistance and abrasion resistance and can meet requirements in production and application processes of the beverage can, andthe technical characteristics of a paint film reach or exceed technical levels of existing similar products.

Application Domain

Fireproof paints

Technology Topic

SolventPolyester +7

Examples

  • Experimental program(5)
  • Effect test(1)

Example Embodiment

[0056] Another embodiment of the present invention provides a method for preparing a metal water-based varnish, comprising the following steps:
[0057] Feeding: under stirring state, add polyester-modified water-based acrylic resin, part of cosolvent, liquid petroleum resin, amino resin, blocked isocyanate and organic acid catalyst to part of water in turn, and stir evenly;
[0058] Viscosity adjustment: take a sample to test the viscosity, add the remaining water and the remaining co-solvent, and adjust the viscosity to 90±10s (T-4# cup, 25℃);
[0059] A metal water-based varnish is obtained.
[0060] In the above preparation method, the stirring speed is 600-800 r/min.
[0061] Specifically, in some embodiments, polyester-modified water-based acrylic resin, partial cosolvent, liquid petroleum resin, amino resin, blocked isocyanate, organic acid catalyst, defoamer, fluid The leveling agent and polyfluorinated wax were added to part of the water in turn and stirred evenly.
[0062] When adjusting the viscosity, after stirring evenly, take samples to test various performance indicators, filter and pack after reaching the standard.
[0063] The metal water-based varnish prepared by the preparation method has excellent high-temperature cooking resistance and wear resistance, can fully meet the needs in the production and application of pop-top cans, and the technical performance of the paint film reaches or exceeds the existing similar products. techinque level.

Example Embodiment

[0065] Example 1
[0066] This example is used to illustrate the water-based varnish for metal disclosed in the present invention and its preparation method.
[0067] (1) Synthesis of polyester-modified water-based acrylic resin: unsaturated polyester (containing six-membered ring structure, solid content of 70%, glass transition temperature of -15 ° C, acid value of 15 mg KOH/g, degree of unsaturation (represented by the iodine value, in terms of non-volatile matter) is 12.7) 70g, 400g of ethylene glycol monobutyl ether and 250g of n-butanol are put into the reactor, and the reaction temperature is controlled at 120 ° C; 10g of tert-butyl peroxybenzoate is Ester (initiator), 100g of methyl methacrylate, 80g of styrene, 150g of butyl acrylate, 300g of hydroxyethyl acrylate, and 80g of acrylic acid were mixed uniformly, and then added dropwise to the reaction kettle, and the dropping time was controlled to be 5 hours. After the monomer and initiator were dripped, the holding time was 3 hours. Then cool down naturally, add 700 g of deionized water and 70 g of N,N-dimethylethanolamine after cooling to below 50°C, stir for 30 minutes, and filter to obtain a polyester-modified water-based acrylic resin.
[0068] (2) described liquid petroleum resin selects NOVARES TD90D for use;
[0069] Described amino resin selects CYMEL 303 for use;
[0070] Described blocked isocyanate selects Bayhydrol BL 5140;
[0071] Described organic acid catalyst selects NACURE 155 for use;
[0072] Described defoamer selects BYK-024;
[0073] Described leveling agent selects BYK-378 for use;
[0074] Described polyfluorowax selects Polyfluo400;
[0075] Described cosolvent selects ethylene glycol monobutyl ether for use;
[0076] The water used is deionized water.
[0077] The dosage of each component is as follows: 18 parts by mass of deionized water, 8 parts by mass of ethylene glycol monobutyl ether, 50 parts by mass of HG317-70, 10 parts by mass of NOVARES TD90D, 7 parts by mass of CYMEL 303, 3 parts by mass of Bayhydrol BL 5140, 0.2 part by mass of NACURE 155DNNDSA, 0.3 part by mass of BYK-024, 0.5 part by mass of BYK-378, 1 part by mass of Polyfluo400.
[0078] 50 parts by mass of HG317-70, 10 parts by mass of NOVARES TD90D, 5 parts by mass of ethylene glycol monobutyl ether, 7 parts by mass of CYMEL 303, 3 parts by mass of Bayhydrol BL 5140, 0.2 parts by mass of NACURE 155 DNNDSA, 0.3 parts by mass of BYK-024 , 0.5 parts by mass of BYK-378, and 1 part by mass of Polyfluo400 were successively added to 15 parts by mass of deionized water, stirred at 600 rpm for 20 min, sampled to test the viscosity of the mixture, and then added 3 parts by mass of deionized water and 3 parts by mass of ethylene glycol monohydrate Butyl ether, stirred for 10min, adjusted the viscosity to 85s (T-4# cup, 25°C), filtered and packaged.

Example

[0079] Example 2 and Example 3

PUM

PropertyMeasurementUnit
Glass transition temperature15.0°C
Acid value15.0mgKOH/g

Description & Claims & Application Information

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