Preparation method and application of oil-water curing agent

A curing agent, oil-water technology, applied in the direction of application, fertilizer mixture, layered/coated fertilizer, etc., can solve the problems of greater harm to the planting environment, poor slow-release effect, and environmental hazards, and achieve short curing time and toughness High, low-cost effect

Active Publication Date: 2018-11-20
秦皇岛天鼎化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing coating materials have poor performance, such as high brittleness, poor compatibility, poor slow-release effect, poor matching with the growth stage of plants, and great harm to the planting environment. For example, when sulfur is used as the coating material, Excessive use will cause soil compaction, and when polyethylene plastic is used as a coating material, although it can make the chemical fertilizer play a slow-release effect, it degrades slowly in the soil, endangering the environment and causing secondary pollution

Method used

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  • Preparation method and application of oil-water curing agent
  • Preparation method and application of oil-water curing agent
  • Preparation method and application of oil-water curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 A kind of preparation method of oil-water curing agent

[0041] This embodiment is an oil-water curing agent, and the preparation method is carried out in sequence according to the following steps:

[0042] (11) Put 0.5L formaldehyde in a container, adjust the pH to 7.0~8.0 with an equal volume of ammonia water in a hot water bath, and obtain A1;

[0043] (12) Add urea to A1, the molar ratio of urea to formaldehyde is 0.3:1, stir well to get B1;

[0044] (13) Heat B1 to 80°C and react for 30 minutes to obtain C1;

[0045] (14) Add 3.55 g of enhancer soluble starch (the mass ratio of soluble starch to urea is 0.03:1) to C1 at a rate of 12 g / min, and keep warm for 30 minutes to obtain D1;

[0046] (15) Add 5.92g of water resistant mineral oil (the mass ratio of mineral oil to urea is 0.05:1) dropwise to D1, and keep it warm for 25 minutes to obtain E1;

[0047] (16) When E1 is stored at 40°C, a liquid oil-water curing agent can be obtained. The curing temp...

Embodiment 2-5

[0049] The preparation method of embodiment 2-5 curing agent

[0050] Examples 2-5 are respectively a preparation method of a curing agent, and the specific preparation steps are similar to those of Example 1, the only difference being that the corresponding technical parameters in the preparation process are different, see Table 1 below for details.

[0051] Table 1 Technical parameter table

[0052]

[0053] The preparation process of Examples 2-5 is simple, the process is easy to control, there is no free formaldehyde in the prepared product, the preparation is safe, the cycle is short, and the cost is low. The prepared curing agent is easy to form a film and has high toughness. After film formation, the curing time Short, 0.5-2.0min at room temperature can be cured, the film layer is uniform, no cracking, good integrity, good water resistance, and has a good slow-release effect.

Embodiment 6

[0054] Embodiment 6 Characterization of oil-water curing agent

[0055] The present invention has carried out relevant characterization experiment to the oil-water curing agent prepared in embodiment 1-5, and specific result is as follows:

[0056] (1) Infrared characterization results

[0057] figure 1 Infrared spectrum of oil-water curing agent, by figure 1 As can be seen, the product prepared in embodiment 1 is at 1567 cm -1 and 1488 cm -1 C=O stretching vibration absorption peak in urea-formaldehyde product C, 1406 cm -1 It is the C-N stretching vibration absorption peak, indicating that the urea-formaldehyde product C has undergone a chemical reaction with starch. 3579 cm in the picture -1 The vibration peak is the effect of intermolecular hydrogen bond between mineral oil and starch, which is the same as 3291cm -1 The stretching vibration absorption peak intensity of the hydroxyl group in starch is significantly weaker than that, indicating that the mineral oil an...

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Abstract

The invention discloses a preparation method and the application of an oil-water curing agent. The preparation method comprises the following steps: firstly reacting urea with formaldehyde and then using starch as a reinforcing agent and mineral oil as a water resistant agent to prepare the oil-water curing agent. The preparation technology is simple, the process is easy to control, the prepared product is free of free formaldehyde, the oil-water curing agent is safe in preparation, short in period and high in yield, the viscosity is in a certain range, the molecular weight and pore size of the net structure of the curing agent are guaranteed, the prepared curing agent is easy in film formation, relatively high in tenacity and short in curing time after film formation, curing can be realized within 0.5 to 2.0 min at a room temperature, the oil-water curing agent is free of cracking, good in integrity and high in water resistance, and has a preferable slow-release effect, and after a compound fertilizer is enveloped, the slow-release time is 15 to 60 d. The preparation method is applicable to preparation of the oil-water curing agent, and is further applied into compound fertilizerenveloping materials.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer coating, and relates to a preparation method and application of an oil-water curing agent. Background technique [0002] The continuous development of agriculture, along with the continuous innovation of agricultural fertilizer related technologies, has increased the output of agricultural products and increased the profits of agricultural products. Due to the long-term use of chemical fertilizers and the characteristics of chemical fertilizers, the nutrient utilization rate of chemical fertilizers is low. In the process of planting agricultural products, topdressing is needed to meet the needs of crops for fertilizer nutrients. If there is no topdressing, crop yields will be small and profits will be low. However, continuous topdressing will not only pollute the environment, increase the cost of planting, but also increase labor intensity. [0003] In order to improve the utilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08G12/40C08G12/12
CPCC08G12/12C08G12/40C05G5/30
Inventor 王宝安刘娜苌豹王文科韩廷振
Owner 秦皇岛天鼎化工有限公司
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