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Tung oil-based composite latex and preparation method thereof

A composite latex and production method technology, applied in coatings, epoxy resin coatings, polyamide coatings, etc., can solve the problem of whether the surface drying speed or the actual drying speed is slow, the fullness and gloss of the paint film are insufficient, and the appearance of the paint film is affected. effect and other issues, to achieve the effect of accelerated surface drying, improved scratch resistance, and improved mechanical properties

Inactive Publication Date: 2019-08-09
HUNAN UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, during the use of the paint made of the above-mentioned emulsified modified tung oil resin liquid, we found that there are still the following shortcomings and deficiencies: First, the drying speed of the paint film is relatively slow, whether it is surface drying speed or actual drying speed. , This is not conducive to the improvement of furniture production efficiency; second, the hardness of the paint film is still low, resulting in scratches on the paint film, which affects the appearance of the paint film; third, the fullness and gloss of the paint film are not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one is used as the transparent varnish of mahogany furniture and imitation mahogany furniture:

[0032] (1) Take 1000 parts by weight of first-grade tung oil and double-bleached linseed oil, mix them into the reaction kettle at a weight ratio of 5:1, repeatedly evacuate and fill with nitrogen for more than three times, then pass in nitrogen, and pass through the temperature of 150-160°C Refining, keep 4-5 hours low temperature polymerization;

[0033] (2) The temperature rises to 260-270°C, and the high-temperature polymerization is kept for 1-3 hours. Tested with a Tu-4 viscometer, the viscosity is 110 seconds, and the color depth of the product is less than 8. After passing the test, the reaction kettle is cooled to 150°C-160°C, then put in 30 parts of carnauba wax, and the dissolution is complete;

[0034] (3) Continue to cool down to 70-90°C, put in 15 parts of beeswax to dissolve, and take a sample test after completion. It is transparent and there is n...

example 2

[0036] Example 2 is used as a waterproof and waterproof seepage coating material:

[0037] (1) Take 1000 parts by weight of first-grade tung oil and double-bleached linseed oil, mix them into the reactor at a weight ratio of 5.5:1, and repeatedly evacuate and fill with nitrogen for more than three times, then pass in nitrogen, and pass through the temperature of 150-160°C Refining, keep 4-5 hours low temperature polymerization;

[0038] (2) The temperature rises to 260-270°C, and the high-temperature polymerization is kept for 1-3 hours. Tested with a Tu-4 viscometer, the viscosity is 110 seconds, and the color depth of the product is less than 8. After passing the test, the reaction kettle is cooled to 150°C-160°C, then put in 40 parts of carnauba wax, and the dissolution is complete;

[0039](3) Continue to cool down to 70-90°C, put in 20 parts of beeswax to dissolve, and take a sample test after completion. It is transparent and there is no insoluble matter. After passing ...

Embodiment 2

[0040] The tung oil-based composite latex produced in embodiment two has a milky white color, a specific gravity of 1.35Kg / L, an acid value less than 5mgKOH / g, and a viscosity of 150 seconds / 25°C measured with a coating-4 viscometer. No unpleasant smell of organic solvents; the surface dry of the coating film is less than 3 minutes / 25°C; the hard drying is less than 12 hours / 25°C, the hardness of the coating film reaches 1H pencil hardness, the gloss is above 90%, and the flexibility is 1mm. The adhesion of the product reaches level 1, and it can be used as a waterproof and anti-leakage coating. The leak-proof of the roof can be kept for more than 10 years, and the leak-proof of the indoor bathroom can be kept for more than 20 years.

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Abstract

The invention discloses a tung oil-based composite latex and a preparation method thereof. First-grade tung oil and double-bleached linseed oil which are used as main materials and citrus oil, water-soluble synthetic resin, yellow beeswax and carnauba wax which are used as auxiliary materials undergo low temperature polymerization, high temperature polymerization, cooling dissolution and stirringdispersing. The tung oil-based composite latex has a milky or transparent color, has a specific gravity of 1.30 Kg / L and an acid value of below 5 mg KOH / g, is detected by a coating-4 viscometer to obtain the viscosity of 150 s / 25 DEG C, and has no solvent odor; the surface drying rate of a film formed by the composite latex is less than 3 min / 25 DEG C; the hard drying rate is less than 12 h / 25 DEGC, the hardness of the film reaches H pencil hardness, the glossiness of the film is 90% or above, the flexibility is 1 mm, the adhesion test by scratch reaches 1 level, and the film is smooth, fulland bright; and different additives are added, so the composite latex can be used as a mahogany furniture and imitating mahogany furniture transparent paint, an interior and exterior wall self-cleaning coating, a steel metal antirust coating or a waterproof and anti-leakage coating.

Description

technical field [0001] The invention relates to a new chemical material, namely a tung oil-based composite latex and a preparation method thereof. Background technique [0002] my country is a big country in the production of tung oil, and it is also a big country in the development and utilization of tung oil. Hundreds of thousands of tons of tung oil are used for coating various objects every year. The utilization of tung oil has a history of thousands of years in our country. Except a small amount of tung oil is used as lamp oil, a large amount of tung oil is used for coating wood, bamboo and other utensils. Tung oil is a dry oil, and its molecules have a certain amount of carbon-carbon double bonds that can be further reacted. After oxidative polymerization and crosslinking, a coating film with excellent flexibility is formed. The wood fiber structure is improved, and the coating film does not produce defects such as cracks, peeling, warping, pinholes, etc., and the sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D191/00C09D191/06C09D197/02C09D177/00C09D163/00C09D129/04C09D7/65
CPCC08L2205/035C09D7/65C09D191/00C08L91/00C08L91/06C08L97/02C08L77/00
Inventor 周诗彪唐志龙肖安国黄小兵唐文龙
Owner HUNAN UNIV OF ARTS & SCI
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