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Aqueous polyurethane gel, process for producing same, and use thereof

A technology of polyurethane and hydrogel, applied in application, chemical instruments and methods, other chemical processes, etc., can solve problems such as difficult to handle mixtures, and achieve easy-to-handle effects

Inactive Publication Date: 2002-08-28
KANSAI PAINT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, after the water is mixed with the resin, the pot life of the mixture is 20 to 30 seconds, so it is difficult to handle the mixture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1 mole of ethylene oxide and propylene oxide (weight ratio 80:20) glycerol branched triol random copolymer (number average molecular weight: 3000; equivalent hydroxyl number: 1000) and 3 moles of toluene base diisocyanate mixture. The mixture was reacted at 80° C. for 10 hours to obtain a polyurethane resin containing three terminal isocyanate functional groups, and its number average molecular weight was about 4000.

[0057] 120 grams of tap water was added to 10 grams of the above-mentioned resin, and fully stirred to obtain a white turbid liquid resin. The resin liquid was flow-coated on a polyethylene plate with a thickness of 3 mm, and left at room temperature for 1 hour to form a pudding-like polyurethane hydrogel. The specific gravity of the hydrogel is 1.02, the volume expansion rate is 1300%, and the compressive strength is 54kg / cm 2 .

[0058] When the hydrogel was cut into 3mm cubes and placed in a wastewater treatment aerator containing 10% wastewater con...

Embodiment 2

[0060] Tap water (110 grams) was added in 10 grams of the resin obtained in Example 1, and fully stirred to obtain a white turbid liquid resin. The resin liquid was flow-coated on a polyethylene plate with a thickness of 2 mm, and left at room temperature for 1 hour to form a pudding-like polyurethane hydrogel. The specific gravity of the hydrogel is 1.05, the volume expansion rate is 1300%, and the compressive strength is 40kg / cm 2 . Hydrogels were cut into 2 mm cubes.

[0061] Subsequently, 100 ml of GY-10 medium (containing 1 g / l of yeast extract and 100 g / l of glucose) and 10 g of the above hydrogel were put into a 500 ml Erlenmeyer flask. Zymomonas mobilis (Zymomonas mobilis) IFO 13756 was added to obtain a concentration of 2% (by weight), and cultured at 30° C. for 24 hours. After the culture, the surface of the hydrogel was washed with distilled water, and then the culture medium was replaced with a new culture medium, and the culture medium was cultured statically f...

Embodiment 3

[0063] 1 mole of diol random copolymer (number average molecular weight: 5000; equivalent number of hydroxyl groups: 2500) of ethylene oxide and propylene oxide (weight ratio: 70:30) was mixed with 2 moles of 1,6-hexamethylene diisocyanate. The mixture was reacted at 100° C. for 2 hours to obtain a polyurethane resin containing two terminal isocyanate functional groups with a number average molecular weight of about 5500.

[0064] Tap water (150 grams) was added to 10 grams of the above-mentioned resin, and fully stirred to obtain a white turbid liquid resin. The resin liquid was flow-coated on a polyethylene plate with a thickness of 1 cm, and left at room temperature for 1 hour to form a pudding-like polyurethane hydrogel. The specific gravity of the hydrogel is 1.01, the volume expansion rate is 1600%, and the compressive strength is 22kg / cm 2 . Cut the hydrogel into 1 cm cubes.

[0065] The hydrogel was incorporated into the soil of potted Viola (decorative plant) in an...

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PUM

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Abstract

The invention provides a polyurethane hydrogel, which, under the condition of the presence of water, has a water-resin (C) weight ratio of greater than 9:1, through which the polyurethane resin (C) containing terminal isocyanate crosslinking and curing preparation. The above resin (C) is a reaction product of a polyisocyanate (A) and a liquid polyhydroxy compound (B) containing 70% or more of a random copolymer in ethylene oxide When the weight ratio of alkane (a) to propylene oxide (b) is 50:50 to 90:10, it is obtained by copolymerizing ethylene oxide (a) and propylene oxide (b). The invention also provides a preparation method and application of the polyurethane hydrogel.

Description

technical field [0001] The invention relates to a novel polyurethane hydrogel, a preparation method thereof, and an application of the polyurethane hydrogel. technical background [0002] A polyurethane resin of the hydrophilic type, that is, a reaction product of a polyol and a polyisocyanate in the presence of water, can be obtained by crosslinking and curing the isocyanate-containing polyurethane resin. The hydrophilic polyurethane resin thus obtained is called a hydrogel, and it is generally used as a carrier for microorganisms and the like. (As described in Volume 29 of Advances in Biochemical Engineering / Biotechnology) [0003] However, the above-mentioned hydrophilic polyurethane resins have disadvantages. Since the polyol as a starting material is a mixture of hydrophilic polyethylene glycol and hydrophobic polypropylene glycol, a solid or highly viscous resin is formed, and it is difficult to mix water with such a resin. In addition, due to the inhomogeneous dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/48C09K17/30
CPCC08G18/10C08G18/4837C08G2210/00C09K17/30C08G18/302C08G18/48
Inventor 矶崎理野田敏树
Owner KANSAI PAINT CO LTD
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