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A slow-release polyphosphate curing agent and its preparation method and its application in the preparation of water glass cured products

A polyphosphate and curing agent technology, applied in the field of curing agent, can solve problems such as insufficient curing performance, and achieve the effects of being conducive to large-area use, prolonging the adaptation period, and improving curing integrity

Inactive Publication Date: 2019-08-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a slow-release polyphosphate curing agent and its preparation method and its application in water glass curing products in view of the lack of curing performance of the existing polyphosphate curing agent

Method used

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  • A slow-release polyphosphate curing agent and its preparation method and its application in the preparation of water glass cured products
  • A slow-release polyphosphate curing agent and its preparation method and its application in the preparation of water glass cured products
  • A slow-release polyphosphate curing agent and its preparation method and its application in the preparation of water glass cured products

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Embodiment 1

[0033] Present embodiment provides a kind of application of slow-release polyphosphate curing agent in the preparation of water glass solidified product, comprises the following steps:

[0034] (1) Dissolve 1 g of polyvinyl alcohol (17-88) in 9 g of deionized water, and stir at a constant temperature of 85°C for 1 hour to obtain a uniform, stable, transparent and clear polyvinyl alcohol solution with a certain viscosity.

[0035] (2) Lower the temperature of the system to 30° C., take 1 g of silica sol and add it to the polyvinyl alcohol solution, and stir at constant temperature for 1 hour to obtain the intermediate product of polyvinyl alcohol;

[0036] (3) Add the above-mentioned polyvinyl alcohol intermediate product and aluminum polyphosphate (1000 mesh) into the beaker according to the mass ratio of 2:10, raise the temperature to 40°C, stir at constant temperature for 1 hour, and obtain the initial polymer-wrapped aluminum polyphosphate curing agent .

[0037] (4) Wrapp...

Embodiment 2

[0041] Present embodiment provides a kind of application of slow-release polyphosphate curing agent in the preparation of water glass solidified product, comprises the following steps:

[0042] (1) Dissolve 1 g of polyvinyl alcohol (20-88) in 9 g of deionized water, and stir at a constant temperature of 85°C for 1 hour to obtain a uniform, stable, transparent and clear polyvinyl alcohol solution with a certain viscosity.

[0043](2) Lower the temperature of the system to 30°C, take 2g of silica sol and add it to the polyvinyl alcohol solution, and stir at constant temperature for 1.5h to obtain the intermediate product of polyvinyl alcohol;

[0044] (3) Add the above-mentioned polyvinyl alcohol intermediate product and silicon polyphosphate (1000 mesh) into the beaker according to the mass ratio of 3:10, raise the temperature to 40°C, and stir at constant temperature for 1 hour to obtain the initial polymer-wrapped silicon polyphosphate curing agent .

[0045] (4) Coating the...

Embodiment 3

[0050] Present embodiment provides a kind of application of slow-release polyphosphate curing agent in the preparation of water glass solidified product, comprises the following steps:

[0051] (1) Dissolve 1 g of polyvinyl alcohol (17-99) in 9 g of deionized water, and stir at a constant temperature of 85° C. for 1 hour to obtain a uniform, stable, transparent and clear polyvinyl alcohol solution with a certain viscosity.

[0052] (2) Lower the system temperature to 30°C, take 4g of silica sol and add it to the polyvinyl alcohol solution, and stir at constant temperature for 1 hour to obtain a polyvinyl alcohol intermediate product;

[0053] (3) Add the above-mentioned polyvinyl alcohol intermediate product and calcium polyphosphate (1000 mesh) into the beaker according to the mass ratio of 4:10, raise the temperature to 35°C, stir at constant temperature for 2 hours, and obtain the initial polymer-wrapped calcium polyphosphate curing agent .

[0054] (4) Coating the calcium...

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Abstract

The invention provides a slow release type polyphosphate curing agent, a preparation method and application thereof in preparation of a sodium silicate cured product. The preparation method comprises the steps that silica sol is added to a polyving akohol aqueous solution to obtain a polyving akohol intermediate product, then the polyving akohol intermediate product and polyphosphate are mixed to obtain a polymer packaged polyphosphate curing agent, and fiannly spray drying is performed to obtain the slow release type polyphosphate curing agent. Accoridng to the slow release type polyphosphate curing agent, the preparation technology is relatively simple, the product stability is high, the adaptability is good, and the storage life is long; the adaptation period is long after a lot of the curing agent (50%) and sodium silicate are mixed, the mixture uniformity and the fluidity are good, and various construction methods of pouring, mould pressing, coating and the like are convenient; the defect that the usage amount of the ordinary curing agent is small is overcome, the usage amount of the slow release type curing agent is increased, influences to the adaptation period and the construction operation of the curing agent and sodium silicate mixture are small, the alkali content in the cured product can be reduced greatly, the curing integrity is improved, and the usage performance of the cured product is enhanced.

Description

technical field [0001] The invention relates to the field of curing agents, in particular to a slow-release polyphosphate curing agent and its preparation method and its application in preparing water glass cured products. Background technique [0002] Silicate water glass is referred to as water glass for short, and is divided into lithium water glass, sodium water glass, and potassium water glass according to the difference of alkali metal ions. Among them, sodium silicate glass has the advantages of simple preparation process, low price, strong acid resistance, and environmental protection, and is widely used in the fields of coatings, fireproof materials, grouting materials, and casting materials. Since the highly water-absorbing alkali metal oxide and a small amount of water-soluble silicate will remain in the water glass cured product, there will be obvious defects in its water resistance; at the same time, the gel curing process involves condensation and sedimentation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B28/26
Inventor 张超灿胡胜鹰
Owner WUHAN UNIV OF TECH
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