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Common polyurethane flexible foam and preparation method thereof

A polyurethane, common technology, applied in the field of common polyurethane soft foam and its preparation, can solve the problems of insufficient compression set performance, poor sponge tear performance, sponge stiffness, etc. effect of dosage

Active Publication Date: 2021-10-22
JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Therefore, the technical problem to be solved by the present invention is to overcome defects such as poor sponge tearing performance, insufficient compression set performance, stiff sponge and insufficient elasticity in the prior art , thereby providing a common soft polyurethane foam with significantly improved air permeability, excellent rebound performance and higher comfort, and a preparation method thereof

Method used

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  • Common polyurethane flexible foam and preparation method thereof
  • Common polyurethane flexible foam and preparation method thereof
  • Common polyurethane flexible foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1.1 A preparation method of polyether polyol that assists in improving polyurethane tearing and compression set performance, comprising the steps:

[0048] 1. Add 41.36g glycerin and 20.68g trimethylolpropane into the closed reactor, replace the air in the reactor with nitrogen, and raise the temperature to 115°C;

[0049] 2. Add 2700kg of ethylene oxide, 237.96kg of propylene oxide and 6kg of dimethylamine, control the pressure of the reactor to 0.4MPa, and polymerize at a temperature of 110°C, and the reaction time is 3h;

[0050] 3. Reduce the pressure and degas for 1 hour to prepare polyether polyol which assists in improving the tearing and compression set properties of polyurethane;

[0051] It has been determined that the polyether polyol that helps improve the tearing and compression set properties of polyurethane has a hydroxyl value of 33.6 mgKOH / g, a viscosity of 1300 mPa·s / 25°C, a molecular weight of 5000, and a water content of 0.05%.

[0052] 1.2 A common...

Embodiment 2

[0059] A kind of polyurethane common flexible foam, its raw material comprises:

[0060] The polyether polyol Puranol F 3500 of 40g, the polyether polyol of 10g embodiment 1 (the polyether polyol that assists to improve polyurethane tearing and compression set performance), the polymer polyol Puranol PP 2045B of 50g, 1.2g organic Silicon surfactant L580, 0.2g of amine catalyst A33, 0.15g of organotin catalyst D20, 3.9g of deionized water and 50.62g of toluene diisocyanate T80; the index is 115.

[0061] The preparation method of above-mentioned polyurethane common soft foam, comprises the steps:

[0062] (1) the polyether polyol Puranol F 3500, the polyether polyol of embodiment 1, polymer polyol, organosilicon surfactant, amine catalyst, organotin catalyst and deionized water are accurate by the weight in the formula Weigh and stir at 2000r / min for 1min to obtain component A. Preheat component A to 23°C for later use;

[0063] (2) Weigh toluene diisocyanate T80 according to...

Embodiment 3

[0066] A kind of polyurethane common flexible foam, its raw material comprises:

[0067] The polyether polyol Puranol F 3500 of 35g, the polyether polyol of 15g embodiment 1 (the polyether polyol that assists to improve polyurethane tearing and compression set performance), the polymer polyol Puranol PP 2045B of 50g, 1.2g organic Silicon surfactant L580, 0.2g amine catalyst A33, 0.12g organotin catalyst D20, 3.9g deionized water and 50.5g toluene diisocyanate T80; the index is 115.

[0068] The preparation method of above-mentioned polyurethane common soft foam, comprises the steps:

[0069] (1) the polyether polyol Puranol F 3500, the polyether polyol of embodiment 1, polymer polyol, organosilicon surfactant, amine catalyst, organotin catalyst and deionized water are accurate by the weight in the formula Weigh and stir at 2000r / min for 1min to obtain component A. Preheat component A to 23°C for later use;

[0070] (2) Weigh toluene diisocyanate T80 according to the weight i...

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Abstract

The invention provides common polyurethane flexible foam. The common polyurethane flexible foam is prepared from the following raw materials: polyether polyol for assisting in improving the tearing and compression permanent deformation performance of polyurethane; the preparation method of the polyether polyol for assisting in improving the tearing and compression permanent deformation performance of the polyurethane comprises the following steps: taking micromolecular polyol with the functionality of 3-4 as an initiator, taking ethylene oxide and epoxypropane as composite monomers, and reacting under the action of a catalyst to prepare the polyether polyol. The polyether polyol has high reaction activity and relatively high ethylene oxide content, and when the polymer polyol is added into other raw materials of common polyurethane flexible foam, not only can the air permeability of sponge be directly improved, but also the use amount of a catalyst in a polymerization reaction process is reduced to the greatest extent, the production cost can be reduced, the obtained polyurethane foam has remarkably improved air permeability, excellent rebound resilience and higher comfort, and the problem that the existing medium-low density polyurethane common soft foam is easy to be stiff in hand feeling is solved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a common flexible polyurethane foam and a preparation method thereof. Background technique [0002] Polyurethane flexible foam, referred to as polyurethane ordinary soft foam, commonly known as sponge, is a polyurethane foam with excellent elasticity and softness, and is the most used type of polyurethane material. Because of its low density, good elasticity, sound absorption, heat preservation, breathability and other properties, it is widely used in carpets, mattresses, sofa cushions and other cushion materials. Soft foam is also used as filter materials, sound insulation materials, shockproof materials, and decorative materials in industry and civil use. materials and packaging materials, etc. [0003] At present, the existing polyurethane ordinary medium and low density sponges on the market mainly have problems such as poor tearing performance of the sponge, insufficient co...

Claims

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Application Information

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IPC IPC(8): C08G18/40C08G18/48C08G18/63C08J9/08C08G101/00
CPCC08G18/4837C08G18/4816C08G18/4072C08G18/632C08G2110/0083
Inventor 汪胜李玉博
Owner JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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