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Low voc polyurethane gloss varnish

A polyurethane and bright light technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor fullness, easy drying of paint films, and environmental pollution, achieving high solid content in construction, reducing the number of coating layers, The effect of saving raw materials

Active Publication Date: 2017-06-23
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the VOC content of PU wood paint coatings on the market is higher than 420 g / L, and the VOC is collected in the production, commissioned processing and import links, which not only increases the cost, but also pollutes the environment, and is difficult to be welcomed by consumers.
On the other hand, for PU gloss varnish, under the construction of higher VOC, the paint film is easy to dry and the fullness is not good. Therefore, the preparation of a low-VOC polyurethane gloss varnish is a problem that technical personnel need to overcome together

Method used

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  • Low voc polyurethane gloss varnish

Examples

Experimental program
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specific Embodiment approach

[0032] The specific embodiment of the present invention provides a low-VOC polyurethane gloss varnish, which is characterized in that it is prepared from component A and component B in a weight ratio of 1:0.6-1.

[0033] Component A is made from the following raw materials in weight ratio:

[0034]

[0035] Component B is made from the following raw materials in weight ratio:

[0036] TDI-TMP 50-70 parts,

[0037] HDI trimer 10-30 parts,

[0038] 20-40 parts of butyl acetate.

[0039] The high-solid and low-viscosity alkyd resin is a short-oil alkyd resin produced by our company, and the high-solid and low-viscosity alkyd resin is a high-solid and low-viscosity short-oil alkyd resin, which consists of the following components by weight The ratio of parts is prepared by:

[0040]

[0041] The medium solvent is xylene; the diluted solvent is one of toluene and xylene or any combination of the two. The hydroxyl value of the high-solid low-viscosity alkyd resin is 110-1...

Embodiment 1

[0059] A high-solid, low-viscosity, short-oil alkyd resin, which is prepared from the following components in the following parts by weight:

[0060]

[0061] The preparation method of the above-mentioned high-solid low-viscosity short-oil alkyd resin is prepared according to the following method:

[0062] (1) 70 parts of oleic acid, 26 parts of neopentyl glycol, 53 parts of trimethylolpropane, 80 parts of phthalic anhydride, 0.06 part of hypophosphorous acid, and 15 parts of xylene are put into the reactor;

[0063] (2) Feed nitrogen or carbon dioxide protective gas into the reactor to remove oxygen in the reactor, then heat up to 150°C, after the material is dissolved, stir for 10 minutes at a speed of 300 rpm, then heat up to 165°C, Allow the material to insulate and reflux in the reactor, and perform esterification reaction for 3 hours;

[0064] (3) Slowly heat up to 190° C. for esterification, and take a sample of the resin during the heat preservation esterification pr...

Embodiment 2

[0068] A high-solid, low-viscosity, short-oil alkyd resin, which is prepared from the following components in the following parts by weight:

[0069]

[0070] The preparation method of the above-mentioned high-solid low-viscosity short-oil alkyd resin is characterized in that: it is prepared according to the following method:

[0071] (1) Put 65 parts of oleic acid, 20 parts of diethylene glycol, 16 parts of ethylene glycol, 75 parts of phthalic anhydride, 35 parts of trimethylolpropane, 0.06 parts of hypophosphorous acid, and 10 parts of xylene into the reaction kettle ;

[0072] (2) Feed nitrogen or carbon dioxide protective gas into the reaction kettle to remove the oxygen in the reaction kettle, then heat up to 160°C, after the material is dissolved, stir at a speed of 600 rpm for 20 minutes, then heat up to 180°C, Allow material to insulate and reflux in the reactor, esterify for 4 hours;

[0073] (3) Slowly heat up to 210°C for esterification, and take a sample of t...

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Abstract

The invention relates to low-VOC polyurethane high-light varnish and a preparation method therefor. The low-VOC polyurethane high-light varnish is prepared from components A and B in a ratio of 1: (0.6-1). The component A is prepared from the following materials in parts by weight: 90-100 parts of high-solid low-viscosity alkyd resin, 0.1-0.5 part of a flatting agent, 0.1-0.5 part of a defoamer, 1-10 parts of a resin modifier and 15-25 parts of a composite environmental-friendly solvent; the component B is prepared from the following materials in parts by weight: 50-70 parts of TDI-TMP, 10-30 parts of a HDI tripolymer and 20-40 parts of butyl acetate. The low-VOC polyurethane high-light varnish provided by the invention has the benefits that the low-VOC polyurethane high-light varnish can be used for reducing the content of VOC during coating construction, so that the varnish not only is environmental-friendly, but also achieves a consumption tax-free purpose; as the solid content in construction is high, the number of coating layers of paint can be reduced, so that the cost is lowered and the raw materials are saved; the film is bright, the fullness is high and the grade of wood lacquer is improved.

Description

technical field [0001] The invention relates to a low-VOC polyurethane glossy varnish. Background technique [0002] In order to promote energy conservation and environmental protection, from February 1, 2015, consumption tax will be levied on paints with a volatile organic compound (VOC) content higher than 420 mg / L (inclusive) under construction. At present, the VOC content of PU wood paint coatings on the market is higher than 420 g / L, and the collection in the production, commissioned processing and import links will not only increase the cost, but also pollute the environment, making it difficult to be welcomed by consumers. On the other hand, for PU glossy varnishes, under the application of higher VOC, the paint film is easy to dry and the fullness is not good. Therefore, the preparation of a low-VOC polyurethane glossy varnish is a problem that technical personnel need to overcome together. Contents of the invention [0003] In order to solve the above-mentioned p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D175/14C09D7/12C08G63/21C08G63/672
Inventor 洪杰张胜军魏川
Owner SKSHU PAINT
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