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Glutinous rice starch/acrylic ester interpolymer and composite and application thereof

An acrylate and copolymer technology, which is applied in the field of sticky rice starch/acrylate copolymer and its composition, can solve the problems of not being popularized and applied, the rebirth of cooked sticky rice cakes, and the short sticking time, etc. High temperature on energy waste, high drug loading, overcoming the effect of active ingredient damage

Inactive Publication Date: 2010-10-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the material is placed or attached, it is easy to lose water and harden, the attachment time is short, and there is also the problem of cooked sticky rice cakes returning to life. Therefore, it has not been popularized and applied.

Method used

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  • Glutinous rice starch/acrylic ester interpolymer and composite and application thereof
  • Glutinous rice starch/acrylic ester interpolymer and composite and application thereof
  • Glutinous rice starch/acrylic ester interpolymer and composite and application thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Add 6g of glutinous rice starch and 60g of distilled water into a four-neck flask, heat to 80°C for gelatinization for 30 minutes under nitrogen protection and stirring; cool down to 60°C, add a few drops of sodium hydroxide solution to adjust pH=9~10, weigh Take 0.1g of potassium persulfate, dissolve it with a small amount of water, slowly drop it into the reactor, keep the temperature constant and stir for 10-30 minutes; then add 1g of acrylic acid and 5g of butyl methacrylate, and react at 65-70°C for 3 hours Adjusting the pH to be neutral, removing part of the water under reduced pressure, then discharging, drying and grinding to obtain the sticky rice starch / acrylic acid ester copolymer AS1.

example 2

[0030]Add 6g of glutinous rice starch and 40g of distilled water into a four-necked flask, heat to 90°C for gelatinization for 20 minutes under nitrogen protection and stirring; cool down to 60°C, add a few drops of saturated aqueous sodium bicarbonate solution to adjust pH = 9, weigh Potassium persulfate 0.1g, dissolved with a small amount of water, slowly added dropwise to the reactor, kept the temperature constant and stirred for 10 minutes; then added 1g of methacrylic acid and 2g of butyl acrylate, reacted at 65-70°C for 12 hours; adjusted the pH Neutral, depressurize to remove part of the water, discharge, dry and grind to obtain sticky rice starch / acrylate copolymer AS2.

[0031] figure 1 It is the nuclear magnetic resonance spectrum of the sticky rice starch / acrylate copolymer (AS1 and AS2) prepared by glutinous rice starch, embodiment 1 and 2. Compared with the NMR spectra of glutinous rice starch, the characteristic peaks of methyl and methylene groups on methacryli...

example 3

[0034] Add 1g of sticky cornstarch and 100g of distilled water to a four-neck flask, heat to 90-100°C for gelatinization for 20 minutes under nitrogen protection and stirring; cool down to 60°C, add a few drops of 10% sodium hydroxide solution to adjust the pH 9 to 10, weigh 0.2g of potassium persulfate, dissolve it with a small amount of water, slowly drop it into the reactor, keep the temperature constant and stir for 10 minutes; then add 8g of methacrylic acid, 6g of acrylic acid, 4g of isopropyl acrylate and 2g of Isooctyl acrylate is reacted at 65-70°C for 16 hours; NaOH solution is added to adjust the pH to be neutral, part of the water is removed under reduced pressure, and then the material is discharged, dried and ground to obtain the sticky rice starch / acrylate copolymer AS3.

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PUM

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Abstract

The invention relates to a glutinous rice starch / acrylic ester interpolymer and a composite and an application thereof. The glutinous rice starch / acrylic ester interpolymer is a product by adopting crylic acid and esters monomer thereof to be copolymerized with the glutinous rice starch, wherein the glutinous rice starch comprises one or a mixture of a plurality of starch of sticky rice, glutinous rice, glutinous corn, millet, glutinous broom corn and glutinous husked kaoliang and modified starch thereof, wherein the glutinous rice starch / acrylic ester interpolymer and the composite forming by the glutinous rice starch / acrylic ester interpolymer and starch or modified starch as well as cross-linking agent are used as water absorbent, tackifier, adhesive, thickener and solubilizer, and are used as medicinal preparation auxiliary materials in medicine tablet, capsule, gels, emulsion, electuary, film agent, poultice and patch.

Description

technical field [0001] The present invention relates to sticky rice starch / acrylate copolymer and its composition and application. The copolymer has good viscosity, water absorption and air permeability, so the invention is suitable for the application of medical adhesives, pressure-sensitive adhesive components, and drug sustained and controlled release carrier materials. Background technique [0002] Rubber pressure-sensitive adhesives are the main pressure-sensitive adhesives used on the skin, mainly using natural or synthetic rubber as the main raw material and adding tackifiers, softeners, antioxidants, stabilizers, etc. The pressure-sensitive adhesives prepared from these raw materials are hydrophobic and cannot effectively absorb water, so it will cause water accumulation in the sticking part and cause the skin to turn white. In addition, the added low-molecular-weight components may penetrate into the skin and cause adverse reactions such as allergies. The emergenc...

Claims

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Application Information

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IPC IPC(8): C08F251/00C09J151/02A61K47/36A61K47/32
Inventor 董岸杰邓联东杜海
Owner TIANJIN UNIV
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