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Coating composition and method of preparing the same

A composition and coating technology, which is applied in dyeing polymer organic compound treatment, coating, fibrous filler, etc., can solve the problems of poor impact resistance of coatings and easy agglomeration of organic solvent-based coatings

Inactive Publication Date: 2009-07-01
海宁市盐官工业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of poor impact resistance of coatings caused by the large amount of titanium dioxide used in the prior art and the agglomeration of nano-calcium carbonate used in organic solvent-based coatings, and to provide a method for adding nano-calcium carbonate without agglomeration and film formation Organic solvent-based coating composition with excellent impact resistance and preparation method thereof

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  • Coating composition and method of preparing the same
  • Coating composition and method of preparing the same

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preparation example Construction

[0024] The preparation method of the coating composition provided by the present invention comprises: mixing thermosetting resin, amino resin, filler and solvent, wherein, when mixing, also add modified nano-calcium carbonate, described modified nano-calcium carbonate is nano-calcium carbonate and containing Carboxylated acrylate polymer contact product.

[0025] The amount of each substance added is such that in the prepared coating, based on the total weight of the coating composition, the content of the thermosetting resin is 15-50% by weight, and the content of the amino resin is 5-30% by weight , the content of the filler is 2-25% by weight, the content of the auxiliary agent is 0-6% by weight, preferably 0.2-5% by weight, the content of the solvent is 10-50% by weight, the modified The content of nanometer calcium carbonate is 8-40% by weight.

[0026] The modified nano-calcium carbonate is prepared by mixing and contacting the nano-calcium carbonate and the carboxyl-co...

Embodiment 1

[0043] This example is used to illustrate the preparation of the coating composition of the present invention used as a primer.

[0044] (1) Preparation of carboxyl-containing acrylate polymers

[0045] 15 grams of acrylic acid, 52 grams of methyl methacrylate, 30 grams of butyl methacrylate, 3 grams of hydroxyethyl acrylate, 0.5 grams of dibenzoyl peroxide (concentration 71%) and 0.5 grams of cumene hydroperoxide (Concentration 80%) Mix well, and filter. Mix 48 grams of xylene and 45 grams of butanol as a solvent, stir and heat up to 115°C under nitrogen protection, at this temperature, add the above-mentioned filtrate dropwise to the solvent within 2 hours, and keep at 115°C for 3 hours, Then it was cooled to room temperature (23°C). Obtain product 192 grams, be colorless transparent liquid, viscosity is 14.8Pa.s, and solid content is 51.2% (the solid content of resin solution refers to the component that resin does not volatilize under 100-120 ℃, is called " Solid part")...

Embodiment 2

[0051] This example is used to illustrate the preparation of the coating composition of the present invention used as a primer.

[0052] (1) Preparation of carboxyl-containing acrylate polymers

[0053] Take component A: 18 grams of styrene, 28.5 grams of ethyl acrylate, 17 grams of methacrylic acid, 4.3 grams of acrylamide, 25 grams of xylene and 20 grams of butanol; component B: 12 ​​grams of styrene, 11.5 grams of acrylic acid Ethyl ester, 15 grams of methacrylic acid, 1.5 grams of azobisisobutyronitrile and 0.8 grams of t-butyryl peroxide.

[0054] Heat component A to 90°C, then add component B dropwise within 30 minutes, and react at 90°C for 30 minutes, then raise the temperature to 120°C, and continue to keep warm for 5 hours. After the reaction was completed, it was lowered to room temperature (23° C.) to obtain 138 grams of product, which was a colorless viscous liquid with a viscosity of 28.3 Pa·s, a solid content of 71.5%, and an acid value of 128.7 mg KOH / g. The ...

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Abstract

The invention discloses a coating composition, which contains a thermosetting resin, an amino resin, a filler and a solvent, and selectively contains an auxiliary agent, wherein the coating composition also contains modified nanometer calcium carbonate, and the modified nanometer calcium carbonate is a product that the nanometer calcium carbonate contacts an acrylic ester polymer containing carboxyl. A method for preparing the coating composition comprises the following steps: the thermosetting resin, the amino resin, the filler and the solvent are mixed, wherein the modified nanometer calcium carbonate is also added into the mixture during the mixing, and is the product that the nanometer calcium carbonate contacts the acrylic ester polymer containing the carboxyl. Compared with the prior amino baking enamel with titanium white added as pigment, the coating composition has excellent shock resistance and low cost, and has strong bonding force with substrates and finishing coats.

Description

technical field [0001] The invention relates to a coating composition and a preparation method thereof. Background technique [0002] At present, most high-temperature curing organic solvent-based coatings with white phases use titanium dioxide as their pigment. Because titanium dioxide, as a pigment of white color paint, has good thermal stability and strong hiding power, the formed film layer is smooth and delicate, and its sanding property is also very good. However, due to the high content of titanium dioxide in the paint, the paint film layer becomes hard and brittle, thereby reducing the impact resistance of the paint film layer. In addition, the price of titanium dioxide is high, which is not good for the cost of coating. [0003] Nano-calcium carbonate particles are a new type of ultrafine solid material developed in the 1980s. In the paint industry, due to its good thermal stability and low price, nano-calcium carbonate acts as a skeleton in the film-forming mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/20C09D7/12C09C3/10C09C1/02
Inventor 谭伟华宫清许静
Owner 海宁市盐官工业投资有限公司
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