Water retention particle preparation method

Abstract

The invention relates to a water retention particle preparation method, wherein acrylic acid, acrylamide, ammonia water, ammonium persulfate, N.N-dimethyl bisacrylamide, sodium hyposulfite and water are combined and prepared into the water retention particles. According to the present invention, the whole production process does not require external auxiliary heating while the sodium hyposulfite is used as the self-initiation thermal agent, such that the temperature of the mixed liquid is automatically increased to achieve natural polymerization forming so as to form the product in a short time; the whole implementation process does not require relevant facilities and equipment while the simple facilities such as the corrosion resistance barrel, the disk and the like are utilized so as to substantially reduce the investment risk; the production process is not limited by the production environment, the full-opening type production can be achieved at the room temperature, even at the low temperature, and the efficient and high-quality water retention particles can be produced within 1 h; and the opening type reaction polymerization is performed during the implementation process, such that the reaction heat dispersion is easily achieved, the product cross-linking is uniform, the grafting rate is increased, and the performance is stable.

Description

technical field [0001] The invention belongs to the technical field of superabsorbent resin preparation, and in particular relates to a preparation method of water-retaining particles. Background technique [0002] Water absorbent resin (SuperAbsorbent Polymer, SAP) is a new type of functional polymer material. It can absorb water hundreds to thousands of times its own weight, non-toxic, harmless, and non-polluting; it has extremely strong water absorption capacity and high water retention capacity, and the high molecular weight polymer obtained through acrylic acid polymerization → high water retention capacity, absorbing under high load The absorbed water cannot be squeezed out by simple physical methods, and it can release and absorb water repeatedly. Applied in agriculture and forestry, it can form "micro reservoirs" in the roots of plants. In addition to absorbing water, super absorbent resin can also absorb fertilizers and pesticides, and release them slowly to incre...

AI Technical Summary

Problems solved by technology

[0005] Other water-retaining agent production technologies require facilities and equipment such as jacketed pots with heating and cooling functions, and uniquely designed reactors; in addition, when these technologies produce water-retaining agent products, it takes several hours to polymerize and form water-retaining agents. time consuming and laborious

In addition, most of the water used in the production of existing water retaining agents is deionized water, and the production cost is relatively high

[0006] In addition, some water-retaining agent production technology still needs nitrogen gas in the production process, and requires polymerization in a specific environment. no competitive advantage