Sand control agent and preparation method thereof

A technology of catalyst and coupling agent, which is applied in the field of desertification control, can solve problems such as restoration of sandy land vegetation, impermeability of thin shells, airtightness, etc., so as to improve survival rate and coverage, ensure normal growth, and prevent massive The effect of evaporation

Inactive Publication Date: 2012-01-18
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thin shell formed by the existing sand-fixing agent is impermeable and air-tight, and there is a shortcoming that plant seeds cannot germinate after spraying the sand-fixing agent, let alone restore sandy vegetation, making sand-fixing and restoring sandy vegetation an irreconcilable pair. contradiction
Therefore, existing sand-fixing agents have not been widely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of sand control agent specifically comprises the following steps:

[0034] 1) Add 40kg of polyether polyol N-330 (Jiangsu Jinpu Group), 30kg of polyether polyol N-220 (Jiangsu Jinpu Group), and 30kg of polybutene glycol to the reactor, and vacuum at 120°C (-0.09MPa) Dehydration for 2 hours, after reducing the water content to 0.02%, lower the temperature to 50°C; then add 10kg of liquefied diphenylmethane-4,4'-diisocyanate (MDI) that has undergone vacuum dehydration, toluene diisocyanate (TDI, type 80 / 20) 12kg, heat up to 85-95°C, stir for 2 hours;

[0035] 2) Then add 2kg of 1,4-butanediol, continue the reaction for 2h, cool down to 50°C, add 0.2kg of catalyst dibutyltin dilaurate, 0.6kg of silane coupling agent (model KH550), 0.4kg of anti-aging agent, After stirring for 0.5h, the detection-NCO was discharged at 9-12%.

Embodiment 2

[0037] 1) Add 37kg of polyether polyol N-330 (Jiangsu Jinpu Group), 35kg of polyether polyol N-307 (Jiangsu Jinpu Group), and 28kg of polybutene glycol to the reactor, and vacuum at 120°C (-0.09MPa) After dehydration for 2 hours to reduce the water content to 0.03%, cool down to 50°C; then add 12kg of liquefied diphenylmethane-4,4'-diisocyanate (MDI) and toluene diisocyanate (TDI, model 80 / 20) 8kg, heat up to 85-95°C, stir and react for 2h;

[0038] 2) Then add 1.8kg of 2,3-butanediol, continue the reaction for 2h, cool down to 50°C, add 0.2kg of catalyst stannous octoate, 0.8kg of silane coupling agent (model SI-900), and 0.4kg of anti-aging agent , stirred for 0.5h, and the detection-NCO was discharged at 8-11%.

Embodiment 3

[0040] 1) Add 70kg of polytetrahydrofuran polyol (PTMEG / 1000) and 30kg of polybutene glycol to the reactor, and dehydrate it under vacuum (-0.09MPa) at 120°C for 2 hours to reduce the moisture content to 0.02%, then cool down to 50°C; Then add 20kg of vacuum dehydrated polymethylene polyphenyl polyisocyanate (first-class product), heat up to 85-95°C, and stir for 3 hours;

[0041] 2) Then add 3kg of 1,4-butanediol, continue the reaction for 2h, cool down to 60°C, add catalyst triethylamine 0.2kg, titanate coupling agent (model HY-401), titanate coupling agent (HY-201) each 0.3kg, anti-aging agent 0.4kg, stirring for 0.5h, detection - when NCO is 9-11%, the material is discharged.

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Abstract

The invention discloses a sand control agent and a preparation method thereof. The sand control agent is prepared by carrying out polymerization reaction on 30-80 parts by mass of polyol and 20-70 parts by mass of diisocyanate, and the sand control agent also contains the following components in parts by mass: 0.01-1 part of catalyst, 0.5-3 parts of coupling agent and 0.1-5 parts of chain extender. The sand control agent disclosed by the invention is water-permeable and air-permeable, and has no influence on the seedling emergence and normal growth of plants; the sand control agent is sprayed on the wet surface of a sandlot after plant seeds are sown on the sandlot and watered; and after 5-7 days and seedling emergence, the sand control agent is gradually solidified to form films, thus the sand grains on the surface are prevented from moving due to wind force, a large amount of water evaporation is prevented at the same time, and the normal growth of the plants after seedling emergence is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of desertification control, and relates to a sand control agent and a preparation method thereof. Background technique [0002] Due to excessive reclamation and felling, the ecological balance has been severely damaged, and the desert in our country has expanded at a rate of 2,460 square kilometers per year, posing an increasing threat to our living environment. Human beings have paid a heavy and huge price in the struggle against desertification, but the results are not satisfactory, and desertification is still expanding. The reason, in addition to the problem of concept, is mainly that there are deficiencies and defects in the existing materials and methods of desertification control. Therefore, to effectively control desertification, we must rely on advanced materials and scientific desertification control methods. [0003] The existing sand-fixing agent is mainly composed of polyvinyl alcohol, polyacr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/30C09K105/00
Inventor 张硕新马柏林蔡靖姜在民毛晓利
Owner NORTHWEST A & F UNIV
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