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Production method of superabsorbent resin

A technology of superabsorbent resin and preparation method, which is applied in the direction of plant preservation, botany equipment and methods, application, etc. It can solve the problems of easy decomposition, no colloidal strength, and inability to promote plant growth, so as to promote root growth, The effect of promoting the development of technology

Active Publication Date: 2016-02-10
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the hydrogels made of such superabsorbent resins are used in medium for water retention such as plant seedling cultivation or long-distance transportation of flowers (such as Japanese Patent Laid-Open No. 63-68026), there are many problems that cannot promote plant germination. and root growth
[0004] Chinese patent CN101948695A discloses a water-retaining agent for plant rooting, which uses carboxymethyl starch to add phytonutrients to prepare a superabsorbent resin to solve the aforementioned problem of not being able to promote plant growth, but the disclosed superabsorbent resin does not have good colloidal strength. It is easy to decompose under long-term use, and cannot supply the water needed for plant germination and growth for a long time

Method used

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  • Production method of superabsorbent resin
  • Production method of superabsorbent resin
  • Production method of superabsorbent resin

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Embodiment 1

[0026] The preparation method of the superabsorbent resin of embodiment 1 comprises the following steps:

[0027] (1) Under ice bath, slowly add 20.8g of 48wt% sodium hydroxide aqueous solution into a solution containing 30g of acrylic acid (sourced from Taiwan Plastic Industry Co., Ltd.), 3g of acrylamide (purchased from Taiwan Jingming Chemical Company) and 32.4g of 100mL Erlenmeyer flask of ionized water for neutralization to obtain a reaction monomer solution; wherein 60mol% of acrylic acid was neutralized into acrylate.

[0028] (2) Add 0.046 g of ethoxylated trimethylolpropane triacrylate (ethoxylated TMPTA) to the above reaction monomer solution and stir to obtain a reaction solution, which is kept at 20° C.

[0029] (3) Add 0.016g of L-ascorbic acid, 0.2g of sodium persulfate and 0.2g of 2,2'-azobis(2-amidinopropane) dihydrochloride to the above reaction solution to initiate the reaction, and after 1 hour of reaction, crude Super absorbent resin.

[0030] (4) Cut the...

Embodiment 2

[0033] The preparation method of Example 2 was the same as that of Example 1 except that the adenine in step (6) was changed to pyridoxine (purchased from ACROS).

Embodiment 3

[0035] Except that the consumption of the aqueous sodium hydroxide solution of this step (1) is changed to 12.2g (wherein the acrylic acid of 35mol% is neutralized as acrylate) and the consumption of the pyridoxine of this step (6) is changed to 0.1g, The preparation method of embodiment 3 is identical with embodiment 2.

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Abstract

The invention relates to a preparation method of a superabsorbent polymer. The method includes: making an unsaturated monomer component undergo a polymerization reaction, and conducting drying to obtain coarse superabsorbent polymer, mixing the coarse superabsorbent polymer, a plant nutrient and a crosslinking agent and carrying out surface crosslinking to make the plant nutrient and the coarse superabsorbent polymer be connected through a chemical bond. Specifically, the unsaturated monomer component comprises a carboxyl-containing alkene monomer partially neutralized by alkali, and the alkali neutralized carboxyl-containing alkene monomer accounts for 30-65mol% of the carboxyl-containing alkene monomer. The preparation method can effectively improve the durability of the prepared superabsorbent polymer, and can promote seed germination and plant root growth.

Description

technical field [0001] The invention relates to a method for preparing a resin, in particular to a method for preparing a superabsorbent resin, which is suitable for technical fields such as agriculture and forestry. Background technique [0002] Superabsorbent resin is a polymer material with high water absorption and water retention. It has been widely used in agriculture, forestry, medical treatment, petroleum, chemical industry, building materials, food and other fields. Resin generally has problems such as high cost and few additional functions. [0003] The production method of superabsorbent resin for agriculture and forestry mostly uses unsaturated ethylenic monomers (such as acrylic acid, acrylamide, etc.) It is obtained after granulation, crushing, surface cross-linking, surface treatment and other procedures. However, when the hydrogels made of such superabsorbent resins are used in medium for water retention such as plant seedling cultivation or long-distance t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F222/02C08F220/04C08F220/56C08J3/24A01N3/00A01N3/02
Inventor 廖启松锺宏宗陈忠毅李政霖林郁珊
Owner FORMOSA PLASTICS CORP
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