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Polyurethane foam stabilizer with low density and low thermal conductivity factor and preparation method thereof

A low thermal conductivity, polyurethane foam technology, applied in the field of polyurethane foam stabilizer and its preparation, can solve the problem that the surface activity, emulsifying performance and comprehensive balance performance of the foam stabilizer need to be improved, and the reduction of the density of the foam core and the reduction of the thermal conductivity are not considered. and other problems, to achieve the effect of excellent emulsification, strong nucleation ability and good nucleation

Active Publication Date: 2008-02-20
JIANGSU MAYSTA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of products in these prior art needs to be further reduced, and they just simply reduce thermal conductivity and do not consider reducing the density of its foam core in addition, also cause its cost higher, and the surfactant of its foam stabilizer, emulsifying performance And the overall balance performance needs to be improved

Method used

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  • Polyurethane foam stabilizer with low density and low thermal conductivity factor and preparation method thereof
  • Polyurethane foam stabilizer with low density and low thermal conductivity factor and preparation method thereof
  • Polyurethane foam stabilizer with low density and low thermal conductivity factor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A) Add 5.8g of allyl alcohol, 120g of ethylene oxide and 100g of propylene oxide into the reactor, and react for 5 hours under the conditions of 1.1g of catalyst KOH, pressure ≤ 0.4Mpa, and reaction temperature of 110°C to obtain terminal Propylene polyether;

[0021] B) react octamethylcyclotetrasiloxane, hydrogen-containing silicone oil, and hexamethyldisiloxane under the action of sulfuric acid at a reaction temperature of 80°C for 5 hours to obtain polysiloxane (II), wherein The molar ratio between octamethylcyclotetrasiloxane, hydrogen-containing silicone oil and hexamethyldisiloxane is 10:1:1.5;

[0022] C) 150 g of modified polyether (I) obtained by the above two-step reaction and 80 g of polysiloxane (II) are heated under normal pressure to 115 ° C under the action of 30 ppm Pt catalyst and 120 g of toluene, and while heating Open the water in and out of the reflux condenser, let the toluene reflux in the kettle through the condenser; then keep warm for 4 hours...

Embodiment 2

[0026] A) Add 5.8g of allyl alcohol, 160g of ethylene oxide and 100g of propylene oxide into the reactor, and react for 6 hours under the conditions of 1.06g of catalyst KOH, pressure ≤ 0.4Mpa, and reaction temperature of 100°C to obtain terminal Propylene polyether;

[0027] B) react octamethylcyclotetrasiloxane, hydrogen-containing silicone oil, and hexamethyldisiloxane under the action of sulfuric acid at a reaction temperature of 80°C for 5 hours to obtain polysiloxane (II), wherein The molar ratio between octamethylcyclotetrasiloxane, hydrogen-containing silicone oil and hexamethyldisiloxane is 15:1:1.5;

[0028] C) 200g of modified polyether (I) obtained by the above two-step reaction and 80g of polysiloxane (II) are heated up to 115°C under normal pressure under the action of 50ppm Pt catalyst and in the presence of 180g xylene, and heated Open the water in and out of the reflux condenser at the same time, so that the xylene is refluxed in the kettle through the conden...

Embodiment 3

[0032] A) Add 5.8g of allyl alcohol, 120g of ethylene oxide and 100g of propylene oxide into the reactor, and react for 4 hours in the presence of 1.0g of catalyst KOH, pressure ≤ 0.4Mpa, and reaction temperature of 130°C to obtain terminal Propylene polyether;

[0033] B) react octamethylcyclotetrasiloxane, hydrogen-containing silicone oil, and hexamethyldisiloxane under the action of sulfuric acid at a reaction temperature of 80°C for 5 hours to obtain polysiloxane (II), wherein The molar ratio between octamethylcyclotetrasiloxane, hydrogen-containing silicone oil and hexamethyldisiloxane is 20:2.5:2;

[0034] C) 150 g of modified polyether (I) obtained by the above two-step reaction and 75 g of polysiloxane (II) are heated to 115° C. under normal pressure under the action of 10 ppm Pt catalyst and in the presence of 110 g of toluene. At the same time, open the water in and out of the reflux condenser, so that the solvent refluxes in the kettle through the condenser; then k...

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Abstract

The invention discloses a low-density and low thermal-conduction-index polyurethane foam stabilizer and a preparation method thereof. The stabilizer can be widely used in polyurethane blowing technique, and enable the thermal conduction index of the pentane-blowing polyurethane foam to be lowered down to 0.0195-0.0200W / m.K, and has excellent functions of heat protection and heat preservation. The low-density and low thermal-conduction-index polyurethane foam stabilizer of the invention is provided with the structures: wherein, the figure of m is 10-80, the figure of n is 1-10, the figure of x is 10-70, the figure of y is 0-30, and m plus n is 11-90, x plus y is 10-100; R can be paraffin, radical aromatic, acyloxy or hydrogen atom that contains 1-4 carbon atoms.

Description

technical field [0001] The invention relates to a polyurethane foam stabilizer and a preparation method thereof, more specifically to a low-density and low thermal conductivity polyurethane foam stabilizer and a preparation method thereof. The stabilizer can be widely used in the polyurethane foam of the pentane foam system. bubble craft. Background technique [0002] Polyurethane foam is an important synthetic material, which has the characteristics of porosity, low relative density and high specific strength. According to the different raw materials used and the change of formula, it can be made into ordinary soft foam, high resilience foam and hard foam. Since its inception, its output has been continuously increasing. Polyurethane foam stabilizer is one of the indispensable additives in the polyurethane foam foaming process. It develops along with the overall adjustment and development of the polyurethane foam industry. [0003] Foam stabilizer, also known as foam stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G77/46C08J9/00
Inventor 金一孙宇
Owner JIANGSU MAYSTA CHEM
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