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Free diisocyanate adsorption, catalysis, purification and separation coating material as well as preparation method and application thereof

A technology of diisocyanate and coating materials, applied in the direction of coating, etc., can solve the problems of cumbersome operation process, long processing cycle, low removal efficiency, etc., achieve improved removal rate, strong applicability, and reduce free diisocyanate content Effect

Active Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of the problems of low removal efficiency, poor applicability, cumbersome operation process and long treatment cycle in the prior art, the purpose of the present invention is to provide a free diisocyanate adsorption catalytic purification separation coating material and its preparation method and application, The coating material of the present invention can be applied to a variety of free diisocyanate removal and separation technologies to achieve the technical goal of polyurethane curing agent detoxification and quality improvement

Method used

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preparation example Construction

[0027] According to the second aspect of the present invention, the present invention provides the preparation method of above-mentioned free diisocyanate adsorption catalytic purification separation coating material, and this preparation method comprises: Urushiol titanium resin, benzyl silicone resin and polyvinyl alcohol resin Mix to make a coating material.

[0028]According to the third aspect of the present invention, the present invention provides the application of the above-mentioned coating material or the coating material prepared by the above-mentioned preparation method in the adsorption, catalytic purification and separation of free diisocyanate.

[0029] The application of the coating material in the invention in the adsorption, catalytic purification and separation of free diisocyanates in polyurethane curing agents.

[0030] Preferably, the coating material is applied in a device for removing free diisocyanate. The composition and dosage of the coating materi...

Embodiment 1

[0043] The target curing agent polyisocyanate uses toluene diisocyanate (TDI) with a molar ratio of 2,4-TDI and 2,6-TDI of 80 / 20, and the polyol uses trimethylolpropane (TMP), 1,2-propylene glycol and polyol Ether (polyethylene glycol 200), in which the equivalent ratio of trimethylolpropane (TMP) and 1,2-propylene glycol is 8:2, the amount of polyethylene glycol 200 is 2% of the total equivalent of hydroxyl groups, and NCO / OH is 2.3 . Put trimethylolpropane (TMP), 1,2-propanediol (PG) and polyethylene glycol 200 into the dehydration kettle, vacuum dehydrate, when the water content is lower than 0.02%, prepare to add dropwise; Heat to above 110°C, separation temperature 170°C, separation pressure 360Pa, after separation, the non-volatile content of the curing agent is 72.3%, the free TDI content is 0.255%, the NCO content is 12.7%, and the viscosity is 1350mPa·s. The separation method of the free isocyanate monomer in the polyurethane adduct is to use a three-stage thin-film ...

Embodiment 2

[0045] The target curing agent is hexamethylene diisocyanate (HDI), the polyol is trimethylolpropane (TMP), 1,2-propanediol and polyethylene glycol 200, trimethylolpropane (TMP) and 1,2 - The equivalent ratio of propylene glycol is 8:2, the amount of polyethylene glycol is 2% of the total equivalent of hydroxyl groups, and the ratio of NCO / OH is 2.8. The synthesized curing agent is preheated to 140°C, the separation temperature is 170°C, and the separation pressure is 460Pa. Using a first-stage thin-film evaporator, the final curing agent index is 53.6% non-volatile matter, free HDI content is 0.57%, and NCO content is 11.8%. Viscosity 1020mPa·s. Set a folded screen at the separation port, and the application area is 10m 2 The coating material, urushiol titanium resin in the coating material: benzyl silicone resin: polyvinyl alcohol resin is 3: 2: 1 (mass ratio), after adopting the catalytic purification coating material material of the present invention, final curing agent ...

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Abstract

The invention belongs to the technical field of free diisocyanate purification materials, and discloses a free diisocyanate adsorption, catalysis, purification and separation coating material as well as a preparation method and application thereof, and the coating material is prepared from urushiol titanium resin, benzyl silicone resin and polyvinyl alcohol resin. The coating material disclosed by the invention can be applied to a plurality of free diisocyanate removal and separation technologies, and the technical targets of toxicity reduction and quality improvement of the polyurethane curing agent are achieved.

Description

technical field [0001] The invention belongs to the technical field of free diisocyanate purification materials, and more specifically relates to a free diisocyanate adsorption catalytic purification separation coating material and its preparation method and application. Background technique [0002] Diisocyanates mainly include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) and dicyclohexylmethane diisocyanate (HMDI). etc. Among them, TDI and HDI are more volatile, and MDI, IPDI and HMDI are less volatile. Diisocyanate groups can change proteins, inactivate enzymes, stimulate receptors and destroy cells. Inhalation of steam volatilized in the air or direct contact with skin will cause serious harm to the human body. Its particularity is that oral toxicity is not high but Inhalation toxicity is high and long lasting. [0003] The mandatory national standard GB 18581-2020 "Limits of Hazardous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/14C09D183/04C09D129/04
CPCC09D161/14C08L2205/03C08L83/04C08L29/04
Inventor 陈锋杨化浩潘新
Owner CHINA PETROLEUM & CHEM CORP
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