Nano-size incombustible polyether polyol polymer and its preparing process and application

A polyether polyol and polymer technology, which is applied in the field of nano-scale flame-retardant polymer polyether polyol and its preparation, can solve the problems of easy sedimentation, coarse particles, and high viscosity of the composition, and achieve stable quality and compatibility. Good, long shelf life effect

Inactive Publication Date: 2002-05-01
朱吕民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since melamine is solid, the presence of a large amount of melamine results in high viscosity, coarse particles, and easy sedimentation of the combined material, making it difficult to operate with high-pressure a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0065] Example

Example Embodiment

[0066] Example 1:

[0067] In a 10-liter thermal reaction kettle, 134 grams of trimethylolpropane as an initiator and 14.4 grams of potassium hydroxide as a catalyst were added, and oxygen was removed by vacuuming. Then add 3966 grams of propylene oxide and 700 grams of ethylene oxide, heat up, and polymerize. Control the polymerization temperature to 110°C and the operating pressure to 0.4Mpa. When the polymerization starts, remove the heat of polymerization in time, keep the temperature between 110--105°C until the pressure in the kettle drops to 0, continue the reaction for another 30 minutes, and discharge the material. Then add neutralizing agent and adsorbent for treatment, filter the clear liquid, and remove low-volatility substances under vacuum to prepare high-activity polyether polyol.

[0068] Product appearance: transparent clear liquid

[0069] Hydroxyl value: 32mgKOH / g

[0070] Acidity: 0.1mgKOH / g

[0071] Moisture: 0.1%

Example Embodiment

[0072] Example 2

[0073] In the 1000ml reactor, add example 1 polyether polyol (Mn5000) 350 grams, melamine 59 grams, cyanoguanidine 59 grams, 37% formalin 150 grams, urea 10 grams. Under stirring, react at 95° C. for 3 hours, and then remove the solvent and water under reduced pressure. A milky white viscous polyether dispersion was obtained.

[0074] Viscosity: 2200mpa s / 25℃

[0075] Storage: no delamination for more than one year

[0076] Electron microscope analysis: the particle size in the dispersion is between 30nm and 200nm

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PUM

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Abstract

A nano-size (10-200 nm) incombustible polyether polyol polymer (MPP) is prepared through dispersing or locally grafting tripolycyanamine, cyanoguanidine and formaldehyde on high-activity polyether polyol at 40-160 deg.C for 5-16 hr. Said MPP has viscosity lower than 2300 MPa.s/25 deg.C and density of 1.120-1.126g/ml, and can be used along with high-activity polyether polyol and assistant to prepare high-resilience foam polyurethane plastics.

Description

technical field [0001] The invention belongs to the category of polyurethane synthetic materials, in particular to a nano-scale flame retardant polymer polyether polyol and its preparation method and application. Background technique [0002] Where the main chain of the polymer molecule is composed of an ether chain (-R-O-R'-), the resin whose molecular end group or side group contains hydroxyl group (-OH) is called polyether polyol. Compounds such as oxyalkylene (ethylene oxide, propylene oxide, etc.), tetrahydrofuran, and polyhydroxy compounds are used as initiators, and the resins synthesized by ring-opening homopolymerization and copolymerization are all such products. Polyether polyols used in polyurethane foam are classified according to molecular composition and structure, and mainly include the following four types: [0003] 1. Propylene oxide homopolyether is prepared by ring-opening homopolymerization of various polyhydroxy compounds (such as propylene glycol, eth...

Claims

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Application Information

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IPC IPC(8): C08G18/48
Inventor 朱吕民钱文浩郭琦
Owner 朱吕民
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