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Aromatic polyester modified polyether polyol and preparation method thereof

A technology of polyether polyol and polyester polyol, applied in the field of modified polyether polyol and its manufacturing, can solve the problems of poor mutual solubility, poor compressive strength and dimensional stability of polyurethane, and achieve easy operation, good compressive strength, high yield effect

Inactive Publication Date: 2011-04-06
SHANGHAI DONGDA POLYURETHANE
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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 to overcome the problems of poor mutual solubility between existing polyether polyols and physical foaming agents, or poor compressive strength and dimensional stability of polyurethane prepared from polyether polyols modified by toluenediamine or vegetable oils. Defects, a modified polyether polyol and preparation method thereof are provided

Method used

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  • Aromatic polyester modified polyether polyol and preparation method thereof
  • Aromatic polyester modified polyether polyol and preparation method thereof
  • Aromatic polyester modified polyether polyol and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0029] 1. Preparation of modified polyether polyols

[0030] Add 212kg of diethylene glycol (2mol) into the reactor, heat up while stirring, then add 148kg of phthalic anhydride (1mol) under stirring, and finally add 72g of catalyst tetraisobutyl titanate (accounting for diethylene glycol and phthalic anhydride) 0.2‰ of the total amount of diformic anhydride), heat up and control the temperature at about 210°C, react for 7 hours, cool down to 120°C and start vacuuming for 1.5 hours to obtain 342kg aromatic polyester polyol; when the temperature drops to within 100°C, Vacuum suction 180kg of sucrose, and carry out nitrogen replacement 3 times, inhale 7.5kg concentration under negative pressure and be 40wt% dimethylamine aqueous solution (accounting for 0.8% of reactant total mass), be warming up to 110 ℃, in 3 hours divide into three Add 400kg of propylene oxide (accounting for 43% of the total mass of the reactant) in batches, and make the reaction pressure not exceed 0.4Mpa, ...

Embodiment 2

[0039] 1. Add 123kg glycerol (1.34mol) to the reactor, heat up while stirring, then add 148kg phthalic anhydride (1mol) under stirring, and finally add 54.2g of catalyst tetraisobutyl titanate (accounting for two 0.2‰ of the total amount of glycol and phthalic anhydride), heat up and control the temperature at 200°C, react for 7.5 hours, cool down to 105°C and start vacuuming for 1-2 hours to obtain 253kg aromatic polyester polyol; when the temperature drops to 100 When within ℃, vacuum suction solid sorbitol 198kg, and carry out nitrogen replacement 3 times, inhale 12kg concentration under negative pressure and be the dimethylamine aqueous solution (accounting for 1.14% of reactant gross mass) of 40wt%, be warming up to 105 ℃, in Add 600kg of propylene oxide (accounting for 57% of the total mass of the reactants) in three batches within 3 hours, and make the reaction pressure not exceed 0.4Mpa, keep warm at 120-125°C for about 2.5 hours until the pressure is zero, and control ...

Embodiment 3

[0047] 1. Add 152kg (2mol) propylene glycol to the reactor, heat up while stirring, then add 148kg (1mol) phthalic anhydride under stirring, and finally add 60g of catalyst tetraisobutyl titanate (accounting for diethylene glycol and o-phthalic anhydride) 0.2‰ of the total amount of diformic anhydride), heat up and control the temperature at about 215°C, react for 8 hours, cool down to 120°C and start vacuuming for 1.5 hours to obtain 282kg aromatic polyester polyol; when the temperature drops below 100°C, vacuum Inhale solid sorbitol 182kg, and carry out nitrogen replacement 3 times, inhale 15kg concentration under negative pressure and be the dimethylamine aqueous solution (accounting for 1% of total mass of reactant) of 40wt%, be warming up to 105 ℃, in 3 hours divide into three Add 1020kg of propylene oxide (accounting for 69% of the total mass of the reactants) in batches, and make the reaction pressure not exceed 0.4Mpa, keep it warm at 120-125°C for about 2.5 hours until...

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Abstract

The invention provides modified polyether polyol and a preparation method thereof. The preparation method comprises the following step of: under the condition of no oxygen and the protection of nitrogen, performing ring-opening polymerization on an epoxy compound with 2 to 4 carbon atoms by taking aromatic polyether polyol and polyol with the functionality of 3 to 9 as a co-initiator in the presence of amine catalysts to obtain the modified polyether polyol. The method overcomes the defects of low intersolubility of the conventional polyether polyol and a physical foaming agent, or low compression strength and dimensional stability of polyurethane prepared from tolylenediamine or vegetable oil modified polyether polyol. The modified polyether polyol can be widely applied to production of rigid polyurethane foam, and has quite good intersolubility with fluorine-free pentane, such as cyclopentane, isopentane, n-pentane and other mixed foaming agents; and the prepared rigid polyurethane foam has high compression strength, dimensional stability and toughness, and is more fine and smooth.

Description

technical field [0001] The invention relates to a modified polyether polyol and a manufacturing method thereof. Background technique [0002] Polyether polyols are mainly used in the production of polyurethane foams, elastomers, adhesives and coatings. Polyether polyol is referred to as polyether, also known as polyalkylene ether or polyoxyalkylene, which is prepared by ring-opening polymerization of epoxy compounds in the presence of active hydrogen-containing compounds as initiators and catalysts. Commonly used epoxy compounds are propylene oxide (PO), tetrahydrofuran, ethylene oxide (EO) and the like. Polyoxypropylene ether polyols (including ethylene oxide-terminated active polyethers) are the most widely used raw material intermediates in the polyurethane industry. This type of polyether is mainly used in the production of polyurethane foam. [0003] At present, with the advancement of fluorine-free environmental protection policies, the field of polyurethane foam ha...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G63/672C08G63/91C08G63/12C08G63/181C08G18/48C08G101/00
Inventor 李心强董建国许凤华于楠
Owner SHANGHAI DONGDA POLYURETHANE
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