Macromolecule water-absorbent resin synthesis for physiological hygiene
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A technology of physiological hygiene and water-absorbing resin, which is applied in the direction of absorbent pads, medical science, bandages, etc., can solve the problems of dry surface and slow water absorption, and achieve the effect of regular particles, high strength and good fluidity
Inactive Publication Date: 2013-05-15
NANTONG KEYI CHEM
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Problems solved by technology
[0011] The traditional preparation method of water-absorbing agent, that is, the one-time cross-linking method of cross-linking at the same time of polymerization, is slow in water absorption and the surface is not dry.
Method used
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Embodiment 1
[0036] Preparation of raw materials: selected acrylic acid, acrylamide, 2-hydroxyethyl acrylate, 2-acrylamido-2-methylpropanesulfonate sodium and N, N methylenebisacrylamide and polyethylene glycol diacrylate The reaction raw materials are weighed according to the following weight ratio, and configured into a solution:
[0037] Preparation of the solution: Weigh 160g of distilled water, add acrylic acid (45g), add sodium hydroxide (19.98g) to neutralize, and the molar neutralization degree is 80%; add AM monomer (5g) to the neutralized acrylic acid solution, Acrylic acid-2-hydroxyethyl ester monomer (5g), 2-acrylamido-2-methylpropanesulfonate sodium monomer (5g) was stirred and dissolved, and added crosslinking agent MBA (0.006g) and polyethylene glycol Dipropionate 600 (0.01 g), stirred to form a homogeneous solution.
[0038] Solution adjustment: adjust the solution temperature to 13±1°C.
[0039] Polymerization of solution: add initiator V50 (0.05g / L) and ammonium persulf...
Embodiment 2
[0044] Preparation of raw materials: selected acrylic acid, acrylamide, 2-hydroxyethyl acrylate, 2-acrylamido-2-methylpropanesulfonate sodium and N, N methylenebisacrylamide and polyethylene glycol diacrylate The reaction raw materials are weighed according to the following weight ratio, and configured into a solution:
[0045] Preparation of the solution: Weigh 160g of distilled water, add acrylic acid (50g), add sodium hydroxide (22.2g) to neutralize, and the molar neutralization degree is 80%; add AM monomer (7g) to the neutralized acrylic acid solution, Acrylic acid-2-hydroxyethyl ester monomer (8g), 2-acrylamido-2-methylpropanesulfonate sodium monomer (5g) stirring and dissolving; And add cross-linking agent MBA (0.005g) and polyethylene glycol Dipropionate 600 (0.008g), stirred to form a homogeneous solution.
[0046] Solution adjustment: adjust the solution temperature to 15±1°C.
[0047] Polymerization of solution: add initiator V50 (0.055g / L) and ammonium persulfate...
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Abstract
The invention discloses a synthesis method of macromolecule water-absorbent resin for physiological hygiene. The macromolecule water-absorbent resin is formed by polymerization of multiple unsaturated double-bond monomers, and achieves polymerization of multiple monomers in a mode of aqueous solution free radical polymerization by adopting a three-section composite initiating system, thereby preparing the high-water-absorbent resin which is regular in granularity, uniform in crosslink, and has few residual monomer content; the high-water-absorbent resin is subjected to surface treatment by utilizing surface treatment liquid, reduces the residual monomer content further, and forms gradient crosslink on the surface of the high-water-absorbent resin, thereby preparing the ultra-high-water-absorbent resin finally. The water absorbent has excellent performances of particles with white appearance, good fluidity, pressure resistance, salt resistance, rapid liquid absorption speed, good surface liquid transmission performance, high liquid absorption amount, less residual monomer content, dry and comfortable surface after water absorption and the like, and is a physiological hygiene product in the field of physiological hygiene, and especially has high requirements on liquid absorption speed and liquid absorption amount of infant paper diapers, adult incontinence sheets, woman sanitary towels and the like.
Description
technical field [0001] The invention relates to a polymer water-absorbent resin for physiological hygiene, which is formed by copolymerization of a variety of monomers containing unsaturated double bonds, and then uses a surface treatment liquid to treat the surface of the super-absorbent resin, and finally prepares a super-absorbent resin. The water-absorbent resin has white particles in appearance, good fluidity, pressure resistance and salt resistance, fast liquid absorption speed, good surface liquid transmission performance, large liquid absorption capacity, low residual monomer content, dry surface after water absorption, etc. Excellent performance, is a physiological and hygienic product. It is a special water-absorbing agent in the field, especially suitable for sanitary products such as infant diapers, adult incontinence tablets, and women's sanitary napkins, which have high requirements for liquid absorption speed and volume. Background technique [0002] In recen...
Claims
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Application Information
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