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Aromatic polyester polyol, raw material composition, polyurethane foam and preparation methods

A technology of aromatic polyester and raw material composition, which is applied in the field of aromatic polyester polyols, can solve the problems of high temperature required for the synthesis of aromatic polyester polyols, high requirements for experimental equipment and production, and poor compatibility. Achieve the effect of low price, high temperature dimensional stability and good compatibility

Inactive Publication Date: 2018-10-23
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the slightly poor compatibility between existing aromatic polyester polyols and cyclopentane, and the high temperature required for the synthesis of aromatic polyester polyols, which leads to relatively high requirements for experimental equipment and production. High and relatively difficult to operate, a kind of aromatic polyester polyol, raw material composition, polyurethane foam and preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Preparation of aromatic polyester polyol:

[0043] Connect the four-necked flask to the water separator, condensed water, stirring rod and thermometer respectively. in N 2 Add 148g of phthalic anhydride, 190.8g of diethylene glycol, 17.73g of 1,6-hexanediol and a catalyst into a four-necked flask under a protective atmosphere, wherein the molar ratio of the above three monomers is: Formic anhydride: diethylene glycol: 1,6-hexanediol=1:1.8:0.15, the mass percentage of the catalyst is 0.02%. Raise the temperature until the monomer melts, start stirring, keep the temperature at about 160°C for 6 hours, then cool down to 140°C and vacuumize for 3 hours.

[0044] 2. Preparation of aromatic polyurethane:

[0045]The aromatic polyurethane raw material composition is mixed, wherein the mass ratio of aromatic polyester polyol to toluene diisocyanate (TDI) is 1.0:0.8, and the mass percentage of cyclopentane is 10%. The above-mentioned aromatic polyurethane raw material com...

Embodiment 2

[0048] 1. Preparation of aromatic polyester polyol:

[0049] Connect the four-necked flask to the water separator, condensed water, stirring rod and thermometer respectively. in N 2 Add 148g of phthalic anhydride, 201.4g of diethylene glycol, 23.63g of 1,6-hexanediol and a catalyst into a four-necked flask under a protective atmosphere, wherein the molar ratio of the above three monomers is: Formic anhydride: diethylene glycol: 1,6-hexanediol = 1: 1.9: 0.20, the mass percentage of the catalyst is 0.03%. Raise the temperature until the monomer melts, start stirring, keep the temperature at about 170°C for 5 hours, then cool down to 145°C and vacuumize for 4 hours.

[0050] 2. Preparation of aromatic polyurethane:

[0051] The aromatic polyurethane raw material composition is mixed, wherein the mass ratio of aromatic polyester polyol to diphenylmethane diisocyanate (MDI) is 1.0:1.1, and the mass percentage of cyclopentane is 10%. The above-mentioned aromatic polyurethane raw...

Embodiment 3

[0054] 1. Preparation of aromatic polyester polyol:

[0055] Connect the four-necked flask to the water separator, condensed water, stirring rod and thermometer respectively. in N 2 Add 148g of phthalic anhydride, 212g of diethylene glycol, 23.63g of 1,6-hexanediol and a catalyst into a four-necked flask under a protective atmosphere, wherein the molar ratio of the above three monomers is: Acid anhydride: diethylene glycol: 1,6-hexanediol=1:2.0:0.20, the mass percentage of the catalyst is 0.02%. Raise the temperature until the monomer melts, start stirring, keep the temperature at about 160°C for 5 hours, then cool down to 130°C and vacuumize for 4 hours.

[0056] 2. Preparation of aromatic polyurethane:

[0057] The aromatic polyurethane raw material composition is mixed, wherein the mass ratio of aromatic polyester polyol to diphenylmethane diisocyanate (MDI) is 1.0:1.3, and the mass percentage of cyclopentane is 10%. The above-mentioned aromatic polyurethane raw materia...

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Abstract

The invention discloses aromatic polyester polyol, a raw material composition, polyurethane foam and preparation methods. The aromatic polyester polyol comprises the following raw materials: phthalicanhydride, diethylene glycol, aliphatic diol and a catalyst, wherein aliphatic diol is linear diol with a carbon number of 6 to 7; a molar ratio of phthalic anhydride to diethylene glycol is 1: (1.8-2.1); and a molar ratio of diethylene glycol to aliphatic diol is (8.0-13.0): 1. The aromatic polyester polyol of the invention uses cheap raw materials and has low cost; the preparation methods are simple in process, mild in reaction conditions, convenient to operate, reduced in energy consumption and friendly to environment; the aromatic polyester polyol prepared by adding aliphatic diol has goodcompatibility with cyclopentane and good thermal stability; and the polyurethane foam of the invention has high compressive strength, excellent flame retardancy and high dimensional stability at hightemperature.

Description

technical field [0001] The invention relates to an aromatic polyester polyol, a raw material composition, polyurethane foam and a preparation method. Background technique [0002] Polyurethane (PU), referred to as PU, is an elastomer polymer material composed of hard segments and soft segments, and is a commonly used foaming material. The soft segment of polyurethane mainly provides the elasticity, toughness and low temperature performance of PU material, and is mainly composed of flexible polyether or polyester. Polyester PU and polyether PU have different performance characteristics. Since the ester group in the polyester PU is more polar than the ether group in the polyether PU, the force between the soft segments in the molecular chain is greater, and the cohesive energy of the ester group (12.2kJ / mol) is higher than that of the ether group. The cohesive energy (4.2kJ / mol) of the base is large, so the polyester PU has higher hardness and mechanical strength than the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G18/76C08G18/42C08J9/14C08G101/00
CPCC08G18/425C08G18/7614C08G18/7671C08G63/672C08G2101/00C08J9/141C08J2203/14C08J2375/06
Inventor 董建国李欣怡方洇何志强谢治国
Owner SHANGHAI DONGDA CHEM
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