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Super absorbent polymer composition and preparation method thereof

A technology of superabsorbent and polymer, which is applied in the field of superabsorbent polymer composition, can solve the problems of characteristic deterioration, reduction of superabsorbent polymer strength, increase of fine particles, etc., and achieve the effect of excellent absorption performance

Pending Publication Date: 2021-09-21
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the amount of fine particles generated in the product may increase, and the strength of the superabsorbent polymer may decrease, thus causing deterioration in characteristics

Method used

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  • Super absorbent polymer composition and preparation method thereof

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preparation example Construction

[0103] Meanwhile, the preparation method may further include a step of classifying the base resin powder composed of the crosslinked polymer on which the surface crosslinked layer is formed.

[0104] By the step of classifying the base resin powder consisting of the crosslinked polymer on which the surface crosslinked layer is formed according to the particle size, the properties of the final product superabsorbent polymer powder can be controlled. The particle size of the superabsorbent polymer obtained through the milling and classifying process may be suitably about 150 μm to 850 μm. More specifically, about 90% by weight, preferably 95% by weight or more of the base resin on which the surface crosslinked layer is formed has a particle diameter of about 150 μm to 850 μm.

[0105] When the particle size distribution of the superabsorbent polymer particles is controlled within a preferred range, the finally prepared superabsorbent polymer can exhibit excellent absorption char...

Embodiment 1

[0122] 450 g of acrylic acid, 2000 ppm of internal crosslinker polyethylene glycol diacrylate (PEGDA 400, Mw=400) and 80 ppm of photoinitiator diphenyl (2,4,6 -trimethylbenzoyl)phosphine oxide and dissolved, and then 618 g of 31.5% sodium oxide solution was added to prepare an aqueous solution of a water-soluble unsaturated monomer (neutralization degree: 73 mol%; solid content: 45.1% by weight). When the temperature of the aqueous solution of the water-soluble unsaturated monomer was raised to 40° C. due to the heat of neutralization, the mixed solution was introduced into a container containing 2400 ppm thermal initiator sodium persulfate (SPS), and then passed through UV (irradiation amount: 10mV / cm 2 ) was irradiated for 1 minute to perform UV polymerization, and heated in an oven at 80° C. for 120 seconds to perform aging, thereby obtaining a hydrogel polymer sheet. The obtained hydrogel polymer sheet was passed through a shredder having a hole size of 16 mm to prepare c...

Embodiment 2 to 10 and comparative example 1 to 4

[0126] A superabsorbent polymer composition was prepared by the same method as in Example 1 except that the components and contents described in Table 1 below were used.

[0127] [Table 1]

[0128]

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Abstract

The present invention relates to a super absorbent polymer composition and a method for preparing same. More specifically, the present invention provides a super absorbent polymer composition exhibiting excellent water absorption performance, and a method for preparing same.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0121171 filed with the Korean Intellectual Property Office on September 30, 2019, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present disclosure relates to superabsorbent polymer compositions exhibiting excellent absorbent properties and methods for making the same. Background technique [0004] Super absorbent polymer (SAP) is a synthetic polymer material that can absorb 500 to 1,000 times its own weight in water, and is also variously named super absorbent material (SAM) according to the development company. ), absorbent gel material (absorbent gel material, AGM), etc. Superabsorbent polymers started to be commercialized as hygiene articles, and they are currently widely used as hygiene articles (such as disposable diapers), etc., water retention materials for soil, water stop m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L33/02C08K5/1565C08K5/1575C08F220/06C08F222/20
CPCC08J3/245C08F220/06C08J2333/02C08K5/1565C08K5/1575C08F222/205C08F6/008C08J3/12C08F6/02C08K5/0025C08K5/42C08K5/109B01J20/267B01J20/28016B01J20/3021B01J20/3085
Inventor 金秀珍金俊圭
Owner LG CHEM LTD