Water absorbability resin composition
A technology of resin composition and water absorption, applied in the direction of absorbent pads, other chemical processes, bandages, etc., can solve the problems of reduced absorption capacity, difficult absorption performance, and insufficient improvement of solid-state properties of absorbent products, so as to reduce moisture return , the effect of balanced absorption performance
Active Publication Date: 2004-08-04
NIPPON SHOKUBAI CO LTD
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Problems solved by technology
The absorbency increases when pressure is applied, while the increase in surface cross-linking density reduces the absorbency without pressure, so it is not easy to obtain a balanced absorbency, and will not sufficiently improve the solid state properties of absorbent products
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0184] 30 parts of the water-absorbent resin A obtained in Reference Example 1 and 70 parts of the water-absorbent resin C obtained in Reference Example 3 were charged at a relative humidity of 40% RH into a Redige mixer (manufactured by Redige Corp, sold under the designation "TypeM5R") to Stirring was carried out at 330 rpm for 15 seconds to obtain a water-absorbent resin composition (1).
Embodiment 2
[0186] The water-absorbent resins A-E obtained in Reference Examples 1-7 were mixed according to the method of Example 1 with the composition ratios listed in Table 8 to obtain water-absorbent resin compositions (2)-(11).
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Abstract
A water-absorbent resin composition excelling in an absorption capacity under pressure, a first transition of initial absorption, and the small amount of rewet is provided. It comprises a water-absorbent resin obtained by aqueous solution polymerization and by reversed-phase suspension or reversed-phase emulsion polymerization and shows a CSF of not less than 20 g / g or an AAP of not less than 20 g / g or an SFC of not less than 10 (unit: 10 -7 × cm 3 × s X g -1 ). The gaps among resin particles owing to the difference in shape form optimum gap widths for the sake of capillarity. The resin composition consequently formed, therefore, manifests such excellent properties without the influences of a surfactant or an emulsifier.
Description
technical field [0001] The present invention relates to a water-absorbent resin composition which is a mixture of water-absorbent resins obtained in various forms and by different polymerization methods, which has excellent absorption characteristics such as absorption capacity, permeability (permeation of physiological saline flow capacity), capillary absorption capacity, the first transition of initial absorption, and reduce the rewet of the absorbed liquid. Background technique [0002] Water-absorbent resins capable of absorbing water tens to hundreds of times their own weight have been developed, and have been used for absorption and water retention. For example, firstly, in hygienic materials including hygienic products and disposable diapers, fields of agricultural and gardening materials, Food fields that require freshness preservation, anti-condensation and heat insulation professional fields. As such water-absorbent resins, hydrolyzed products of starch-acrylonitr...
Claims
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IPC IPC(8): A61L15/60B01J20/26C08J3/00
CPCB01J20/26A61L15/60C08J3/005B01J2220/44Y10S524/916B01J20/28004C08J2300/14C08F2/14C08F2/32
Inventor 藤丸洋圭和田克之石崎邦彦井村元洋井上博树
Owner NIPPON SHOKUBAI CO LTD
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