An emulsion and its water-based varnish with a wide and continuously changing glass transition temperature range prepared by using the emulsion
A technology of glass transition and temperature range, applied in the direction of coating, etc., can solve problems such as difficult to have, difficult to have multi-shape memory effect, etc., and achieve good gloss effect
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Embodiment 1
[0043] The present invention is used to prepare the emulsion of water-based varnish with a wide range of glass transition temperature and continuously changing, expressed in mass percentage, composed of 64.4% of hard monomers that can impart toughness to the film formed by the emulsion and can impart the film formed by the emulsion The flexible monomer 35.6% composition; In addition, add the emulsifier that is 4.0% of the total amount of two monomers, the initiator that is 0.61% of the total amount of the two monomers, the initiator that is 0.32% of the total amount of the two monomers Buffering agent and deionized water (the deionized water two parts application here for two kinds of monomer total amount 86.5%): the one, be used for preparing macromolecular monomer aqueous acrylic resin aqueous solution; agent is added to the reactor together);
[0044] Described hard monomer is styrene 45.08g, methyl methacrylate 16.70g and macromer water-based acrylic resin 54.0g; Described...
Embodiment 2
[0046] The present invention is used for the preparation method of the emulsion of the water-based varnish that the range of glass transition temperature is wide and changes continuously, and the detailed steps of this preparation method are as follows:
[0047] a, first weigh various raw materials according to the formula composition of the emulsion described in Example 1; add 54.0g of the macromer water-based acrylic resin to be weighed and add 126.0g deionized water to be mixed with aqueous solution, water-based acrylic resin aqueous solution and buffer carbonic acid Add 0.58g of sodium hydrogen, 7.2g of emulsifier fatty alcohol polyoxyethylene ether AEO-9 and 29.7g of deionized water into a 500mL four-necked reaction flask for heating and stirring. When the temperature reaches 40±1°C, keep the constant temperature for 20min; then Add 12.6g of mixed rigid small molecule monomers (9.2g of styrene and 3.4g of methyl methacrylate) dropwise, and finish adding in 14min, then rais...
Embodiment 3
[0051] The water-based varnish of the present invention has a wide range of glass transition temperatures and continuously changes, the water-based varnish is made of the emulsion prepared in Example 2 as a film-forming substance, and is compounded with a defoamer and a leveling agent; the defoamer Jitu Yile DF-52 is 0.2% of the total mass of the emulsion, and the leveling agent WB-T863 is 0.8% of the total mass of the emulsion.
[0052] The wide and continuously changing water-based varnish of the present invention is prepared by the following method:
[0053] a. First weigh 150.0g of the emulsion prepared in Example 2 as a raw material and add it to a 250mL four-neck bottle, then stir and heat it. When the temperature reaches 38±2°C, add 0.3g of Tuyile DF-52 at a constant temperature. Stir at constant temperature for 30 minutes at high temperature; then add 1.2g WB-T863 leveling and wear-resistant hand feel agent, and stir at constant temperature for 30 minutes at this tempe...
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Abstract
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