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A self-repairing rodent-proof and termite-proof polyurethane, preparation method and application

A self-repairing and polyurethane technology, which is applied in the field of preparation and self-repairing anti-rodent and ant-proof polyurethane, can solve the problems of poor anti-rodent and ant-proof polyurethane anti-rodent and ant-proof effects, etc., achieve good anti-rodent and ant-proof effects, improve service life, The effect of good mechanical properties

Active Publication Date: 2021-07-16
ANHUI UNIVERSITY OF ARCHITECTURE
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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: the existing anti-rodent and ant-proof polyurethane has poor anti-rodent and ant-proof effect, and a self-repairing anti-rodent and ant-proof polyurethane, preparation method and application are provided

Method used

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  • A self-repairing rodent-proof and termite-proof polyurethane, preparation method and application
  • A self-repairing rodent-proof and termite-proof polyurethane, preparation method and application
  • A self-repairing rodent-proof and termite-proof polyurethane, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Synthesis of polyurethane prepolymer:

[0031] Under the protection of nitrogen, 46g of PTMG was dehydrated at 110°C for 1h under the condition of vacuum degree ≤0.1MPa, cooled to 60°C, added 22g of IPDI (isophorone diisocyanate) and 0.1g of stannous octoate, and reacted for 1h to obtain polyurethane pre- Polymer;

[0032] (2) Synthesis of self-repairing anti-rodent and ant-proof polyurethane:

[0033] (21) Add 10g of 4,6-dihydroxypyrimidine and 10ml of N-methylpyrrolidone sequentially into the reactor, and react at 60°C for 3h;

[0034] (22) Add 6g of nickel chloride hexahydrate to the reactor, keep it warm at 60°C for 1h, then add 1g of phenylthiourea, and react at 50°C for 1h;

[0035] (23) Desolventization is obtained from repairing rodent-proof and termite-proof polyurethane.

[0036] The self-healing efficiency and anti-rodent and ant-proof properties of the prepared self-repairing rodent-proof and termite-proof polyurethane were tested respectively.

[00...

Embodiment 2

[0059] (1) Synthesis of polyurethane prepolymer:

[0060] Under the protection of nitrogen, 50g of PCL was dehydrated at 115°C for 2 hours under the condition of vacuum degree ≤ 0.1MPa, cooled to 80°C, and then 25g of MDI (4,4-diphenylmethane diisocyanate) and 0.1g of stannous octoate were added successively, and the reaction 2h, obtain polyurethane prepolymer;

[0061] (2) Synthesis of self-repairing anti-rodent and ant-proof polyurethane:

[0062] (21) Add 12g of 4,6-dihydroxypyrimidine and 10ml of tetrahydrofuran to the reactor successively, and react at 80°C for 4h;

[0063] (22) Add 6g of nickel chloride hexahydrate to the reactor, keep it warm at 80°C for 2h, add 0.8g of capsaicin, and react at 90°C for 2h;

[0064] (23) Desolventization is obtained from repairing rodent-proof and termite-proof polyurethane.

[0065] The repair efficiency of the obtained product is 72%, the tensile strength is 5.0 MPa, and the elongation at break is 750%.

[0066] After anti-rat and ...

Embodiment 3

[0069] (1) Synthesis of polyurethane prepolymer:

[0070] Under the protection of nitrogen, dehydrate 55g of PPG at 120°C for 3 hours under the condition of vacuum degree ≤ 0.1MPa, cool down to 90°C, add 18g of TDI (toluene diisocyanate) and 0.1g of stannous octoate, and react for 3 hours to obtain a polyurethane prepolymer;

[0071] (2) Synthesis of self-repairing anti-rodent and ant-proof polyurethane:

[0072] (21) Add 8g of 4,6-dihydroxypyrimidine and 10ml of oxane to the reactor successively, and react at 90°C for 5h;

[0073] (22) Add 7g of nickel chloride hexahydrate to the reactor, keep warm at 90°C for 3h, add 0.8g of phenylthiourea, and react at 100°C for 3h;

[0074] (23) Desolventization is obtained from repairing rodent-proof and termite-proof polyurethane.

[0075] The repair efficiency of the obtained product is 70%, the tensile strength is 4.8 MPa, and the elongation at break is 850%.

[0076] After anti-rat and ant-proof tests, it was found that there were ...

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Abstract

The invention discloses a self-repairing rodent-proof and termite-proof polyurethane, a preparation method and application thereof, comprising the following steps: under the protection of nitrogen, polymer polyol with a mass percentage of 45-65% is added to a reactor, and 110-120 Vacuum dehydration at °C for 1-3 hours, then lower the temperature to 60-90 °C, then sequentially add 11-25% polyisocyanate and 0.1-0.3% catalyst to the reactor, stir and mix evenly, and react for 1-3 hours to obtain Polyurethane prepolymer, add 6-15% of pyrimidine and 10-20% of solvent to the reactor in sequence, stir and mix evenly, react at 60-90°C for 3-5 hours, add 3-8% by mass % nickel chloride, stirred and mixed evenly, reacted at 60-90°C for 1-3h, then added 0.3-2.0% rodent repellent at 50-100°C for 1-3h, and removed the solvent to obtain the self-repairing anti-corrosion agent The mouse-proof and termite-proof polyurethane has excellent self-repair performance, and has good effect of preventing mice and termites.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a self-repairing rodent-proof and ant-proof polyurethane, a preparation method and application. Background technique [0002] Polyurethane is a block polymer. Generally, long-chain diols form soft segments, and polyisocyanates and chain extenders form hard segments. Due to the thermodynamic incompatibility of soft and hard segments, polyurethane has a special microphase separation structure. The soft segment is connected by the hard segment, and the hard segment is aggregated due to hydrogen bonding. The soft segment affects the elasticity and low temperature properties of the material, and the hard segment affects the mechanical properties of the material. Therefore, polyurethane resin has excellent elasticity, low temperature resistance and mechanical properties. It has good processability and is one of the most widely used resins at present. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/10C08G18/32C08K3/16C08L75/06C08L75/08
CPCC08G18/10C08G18/4277C08G18/48C08G18/4854C08G18/6651C08G18/6685C08K3/16C08G18/3848C08L75/08C08L75/06
Inventor 胡先海李明君咸玉席胡鹏威马汪洋龚成兵乔启信杨洪涛程从亮陈建利
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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