Acrylate modified maleopimaric acid aqueous polyurethane emulsion and preparation method thereof

A technology of maleopimaric acid and water-based polyurethane, which is applied in the field of preparation of acrylate-modified maleopimaric acid water-based polyurethane emulsion, can solve the problems of low hardness and poor water resistance, and achieve good heat resistance

Active Publication Date: 2012-04-11
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the shortcomings of low hardness, heat resistance and poor water resistance of the water-based polyurethane emulsion existing in the prior art, the invention provides a kind of acrylate-modified maleopimaric acid water-based polyurethane emulsion and a preparation method thereof. The prepared water-based polyurethane emulsion has pull High tensile strength, good heat and water resistance, good chemical resistance, etc.

Method used

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  • Acrylate modified maleopimaric acid aqueous polyurethane emulsion and preparation method thereof
  • Acrylate modified maleopimaric acid aqueous polyurethane emulsion and preparation method thereof
  • Acrylate modified maleopimaric acid aqueous polyurethane emulsion and preparation method thereof

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preparation example Construction

[0032] A kind of preparation method of acrylate modified maleopimaric acid aqueous polyurethane emulsion, the steps are:

[0033] The first step is to prepare the maleopimaric acid polyester polyol: compound the modified rosin polyacid alone or with the dibasic acid with 3 to 6 carbon atoms in any ratio, and mix it with the small molecule polyol, at 150-270°C Make maleopimaric acid polyester polyol through dehydration condensation reaction under the condition;

[0034] The second step is to prepare maleopimaric acid water-based polyurethane emulsion: the maleopimaric acid polyester polyol obtained in the first step is compounded alone or with polyether polyol or polyester polyol in any ratio, at 100-120°C Vacuum dehydration for 2-3 hours, after cooling, add diisocyanate and catalyst to react at 60-90°C for 1-3 hours, then add hydrophilic monomer and react at 60-90°C for 1-2 hours, then add organic solvent and small molecule diffuser The chain agent is reacted at 0-70°C for 3-...

Embodiment 1

[0045] Add 15.6g of maleopimaric acid and 11.8g of diethylene glycol to a 500ml flask equipped with a thermometer, a stirrer, an air duct, and a distillation head, react at 220°C until the acid value of the system drops to 100mg / g, and then react under vacuum When the acid value of the system drops below 60mg / g, the temperature is lowered to 160°C and the material is discharged to obtain maleopimaric acid polyester polyol (MAPP) with a hydroxyl value of 68.2mg / g.

[0046] Take the above maleopimaric acid polyester polyol MAPP 8.8g, polyether N-210 16.3g, vacuum dehydration at 120°C for 2-3h, add toluene diisocyanate (TDI) 13.5g after cooling, react at 78°C for 2h, then Add 2.16g of dimethylolpropionic acid (DMPA) and react at 75°C for 1h, then add acetone, diethylene glycol (DEG) 2.5g, and catalyst dibutyltin dilaurate (DBT) 0.02g and react at 60°C for 4-5h , cooled to 15°C, added triethylamine (TEA) for neutralization, dispersed in water under vigorous stirring, and finally v...

Embodiment 2

[0057] Add 15.0 g of maleopimaric acid and 11.9 g of diethylene glycol to a 250 ml flask equipped with a thermometer, a stirrer, an air duct, and a distillation head, and react at 220 ° C until the acid value of the system drops to 100 mg / g, and then react under vacuum conditions When the acid value of the system drops below 60mg / g, the temperature is lowered to 160°C and the material is discharged to obtain maleopimaric acid polyester polyol (MAPP) with a hydroxyl value of 85.7mg / g.

[0058] Take 5g of maleopimaric acid polyester polyol and 20g of polyether N-210, vacuum dehydrate at 100-120°C for 2-3 hours, add TDI 16g after cooling, react at 85°C for 1.5 hours, then add 2.3g of DMPA , react at 85°C for 1 hour, finally add 4.3g DEG and 12g acetone, react at 60°C for 4-5 hours, add TEA to neutralize after cooling, stir vigorously, disperse in 100g water under high-speed shear, and remove acetone under reduced pressure to obtain Maleopimaric acid aqueous polyurethane emulsion...

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Abstract

The invention discloses an acrylate modified maleopimaric acid aqueous polyurethane emulsion and preparation method thereof. The maleopimaric acid aqueous polyurethane emulsion is heated to 40-90 DEG C and acrylate with a mass of 1-50 percent of the maleopimaric acid aqueous polyurethane emulsion is respectively added under a stirring condition; after the maleopimaric acid aqueous polyurethane emulsion and the maleopimaric acid aqueous polyurethane emulsion are stirred uniformly, a persulfate initiator is dropped completely in 2-4h; after the persulfate initiator is dropped, heat preservationreaction is carried out for 1-3h and then the acrylate modified maleopimaric acid aqueous polyurethane emulsion is prepared. The dosage of the persulfate initiator is 0.01-1.5 percent of the mass of the monomer acrylate, the reaction temperature is controlled at 40-90 DEG C and the solid content of the maleopimaric acid aqueous polyurethane emulsion is 20-35wt percent. The prepared product has the characteristics of excellent mechanical property, good water and heat resistance, excellent chemical agent resistance, etc.

Description

[0001] technical field [0002] The invention relates to a water-based polyurethane emulsion and a preparation method thereof, in particular to a preparation method of an acrylate-modified maleopimaric acid water-based polyurethane emulsion. [0003] Background technique [0004] Water-based polyurethane (WPU) is a binary colloidal system formed by dissolving or dispersing polyurethane in water. It retains the characteristics of solvent-based polyurethane relatively completely. At the same time, because its continuous phase is water, it has no pollution to the environment, is safe and easy to store. And storage, easy to use. Therefore, the development and production of water-based polyurethane emulsion has been paid more and more attention by countries all over the world. [0005] However, a single WPU emulsion has disadvantages such as poor self-thickening property, low solid content, poor water resistance and glossiness of the film. In order to better utilize the excelle...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08G18/68
Inventor 商士斌宋湛谦徐徐宋杰崔淑芹王丹王宏晓
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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