Ultra-low-density rigid polyurethane foam and preparation method thereof

A rigid polyurethane and ultra-low density technology, applied in the field of ultra-low density rigid polyurethane foam and its preparation, can solve the problems of poor dimensional stability, reduced foam strength, reduced foam density, etc. The effect of improving foam performance and improving viscoelasticity

Inactive Publication Date: 2019-10-18
NANJING HONGBAOLI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the foam density will bring a series of defects such as reduced foam strength and poor dimensional stability.

Method used

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  • Ultra-low-density rigid polyurethane foam and preparation method thereof
  • Ultra-low-density rigid polyurethane foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Component A: The feed liquid temperature is 22°C,

[0062] Complex polyol: hydroxyl value 430mgKOH / g, 100 parts, including:

[0063] Polycarbonate polyol: hydroxyl value 100-300mgKOH / g, 3 parts;

[0064] Polyether polyol A: sucrose polyether polyol with a hydroxyl value of 430-520 mgKOH / g, 50 parts;

[0065] Polyether polyol B: sorbitol polyether polyol, hydroxyl value 380-440mgKOH / g, 37 parts;

[0066] Polyether polyol C: glycerin polyether polyol, hydroxyl value 340-400mgKOH / g, 10 parts;

[0067] Catalyst: 0.6 parts of pentamethyldiethylenetriamine; 0.4 parts of triethylenediamine; 0.5 parts of 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine;

[0068] Silicone surfactant: 1.5 parts of L-6863, 0.5 parts of L-6861;

[0069] Water: 1.8 parts;

[0070] Pentane: 12 parts, including 6 parts of cyclopentane and 6 parts of n-pentane;

[0071] Nucleating agent: 2.0 parts of perfluoro-1-butene;

[0072] Component B: The feed liquid temperature is 6°C,

[0073] Butane:...

Embodiment 2

[0077] Component A: The feed liquid temperature is 30°C,

[0078] Complex polyol: hydroxyl value 450mgKOH / g, 100 parts, including:

[0079] Polycarbonate polyol: hydroxyl value 150-300mgKOH / g, 10 parts;

[0080] Polyether polyol A: sucrose polyether polyol with a hydroxyl value of 450-550 mgKOH / g, 60 parts;

[0081] Polyether polyol B: phenylenediamine polyether polyol, hydroxyl value 360-440mgKOH / g, 10 parts;

[0082] Mannich polyol: hydroxyl value 380-480mgKOH / g, 20 parts;

[0083] Catalyst: 0.3 parts of bis(dimethylaminoethyl) ether, 1.2 parts of N,N-dimethylcyclohexylamine, 0.5 parts of 2-hydroxypropyltrimethylammonium formate;

[0084] Silicone surfactant: L-6866 1.5 parts, L-6884 1.0 parts;

[0085] Water: 2.2 parts;

[0086] Pentane: 15 parts, including 5 parts of n-pentane, 5 parts of isopentane, and 5 parts of cyclopentane;

[0087] Nucleating agent: 2.5 parts of perfluoro-2-methyl-2-pentene;

[0088] Component B: The feed liquid temperature is 10°C,

[0089] ...

Embodiment 3

[0093] Component A: The feed liquid temperature is 34°C,

[0094] Polyol composition: hydroxyl value 550mgKOH / g, 100 parts, including:

[0095] Polycarbonate polyol: the hydroxyl value is 250-350 mgKOH / g, 5 parts;

[0096] Polyether polyol A: sucrose polyether polyol with a hydroxyl value of 550-590 mgKOH / g, 80 parts;

[0097] Polyether polyol B: pentaerythritol polyether polyol with a hydroxyl value of 480-580 mgKOH / g, 15 parts;

[0098] Catalyst: 0.3 parts of bis(dimethylaminoethyl) ether, 0.3 parts of triethylenediamine; 0.4 parts of 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine;

[0099] Silicone surfactant: 1.0 parts of L-6884, 1.0 parts of L-6866; 1.0 parts of AK8818;

[0100] Water: 1.0 parts;

[0101] Pentane: 10 parts of isopentane;

[0102] Nucleating agent: 1 part of octafluoropentyl tetrafluoroethyl ether;

[0103] Component B: The feed liquid temperature is 8°C,

[0104] Butane: 8 parts, including 6 parts of isobutane and 2 parts of n-butane;

[0105] Po...

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Abstract

The invention relates to ultra-low-density rigid polyurethane foam with pentane and butane as foaming agents. The ultra-low-density rigid polyurethane foam is prepared by well premixing a component Aand a component B, and then well mechanically mixing and foaming the component A and the component B, wherein the component A is prepared from the components in parts by weight: 100 parts of pluronicpolyols, 4-15 parts of the pentane, 1-5 parts of a catalyst, 1-5 parts of an organosilicon surfactant, 1-2.5 parts of water and 0-3 parts of a nucleating agent, the component B is prepared from the components in parts by weight: 2-12 parts of the butane and 120-210 parts of polyisocyanates, and raw materials are based on 100 parts of pluronic polyols. According to the prepared foam, foam holes arefine and uniform, the heat conductivity coefficient is small, the compression strength is high, and the overall performance is excellent. The invention further discloses a preparation method of the rigid polyurethane foam.

Description

technical field [0001] The invention relates to an ultra-low density rigid polyurethane foam and a preparation method thereof, in particular to an ultra-low density rigid polyurethane foam using pentane and butane as blowing agents and a preparation method thereof. Background technique [0002] Rigid polyurethane foam (hereinafter referred to as rigid foam) has the characteristics of excellent thermal insulation performance, sound insulation, insulation, light weight, high specific strength, and good processing performance, and is widely used as thermal insulation and cold insulation materials. In order to achieve a better thermal insulation effect, a certain amount of physical foaming agent with low boiling point and low thermal conductivity needs to be added to the foam material. Unfortunately, the traditional polyurethane blowing agent monofluorotrichloromethane (CFC-11) can seriously damage the ozone layer. After the signing of the "Montreal Protocol" in 1987, countries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/42C08G18/44C08G18/48C08G18/50C08J9/08C08J9/14C08G101/00
CPCC08G18/4018C08G18/4202C08G18/4208C08G18/44C08G18/4829C08G18/4883C08G18/4891C08G18/5021C08J9/08C08J9/141C08J2203/02C08J2203/14C08J2203/204C08J2375/04C08G2110/0025C08G2110/005
Inventor 邢益辉吴一鸣傅振华
Owner NANJING HONGBAOLI POLYURETHANE
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