Modified foaming polyurethane and preparation method thereof

A foamed polyurethane and modified technology, applied in the field of polyurethane, can solve the problems of severe temperature requirements and failure, and achieve the effect of increasing uniform dispersion and increasing nucleation points.

Inactive Publication Date: 2021-11-02
CHUZHOU YULIN POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the polyethylene glycol in the STF base material is liquid and soluble in water, the temperature requirements in the applied environmental scene are relatively strict, and it is easy to fail at higher or lower temperatures

Method used

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  • Modified foaming polyurethane and preparation method thereof
  • Modified foaming polyurethane and preparation method thereof
  • Modified foaming polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Modified polyborosiloxane is made by the following steps:

[0036]X1. Add 0.1mol perfluorohexyl iodide and 0.1mol allyl acetate into a four-necked flask equipped with a condenser, thermometer, drying tube, and stirring paddle, heat to 93°C for 3 minutes, and add a mass of perfluorohexyl iodide 0.1% benzoyl peroxide by the mass of alkane, after the reaction heats up rapidly to 150°C, continue the reaction for 30min, and when the reaction temperature drops to 80°C, add 100mL of n-hexane and 1% of the mass of perfluorohexyl iodane % potassium hydroxide, reacted for 6h, cooled and filtered, washed with n-hexane, and the filtrate was distilled under reduced pressure to collect 77°C / 40mmHg fractions to obtain 3-perfluoro-n-hexyl-1,2-epoxypropane; add to a completely sealed flask 0.1mol 3-perfluoro-n-hexyl-1,2-epoxypropane, 20mL methanol and 80mL ammonia water with a mass fraction of 28%, stirred for 12 hours, rotary evaporation to remove ammonia water and methanol, and then a...

Embodiment 2

[0040] Modified polyborosiloxane is made by the following steps:

[0041] X1. Add 0.1mol perfluorohexyl iodide and 0.13mol allyl acetate into a four-necked flask equipped with a condenser, thermometer, drying tube, and stirring paddle, heat to 93°C for 3 minutes, and add a mass of perfluorohexyl iodide 0.3% benzoyl peroxide by the mass of alkane, after the reaction heats up rapidly to 150°C, continue the reaction for 30min, and when the reaction temperature drops to 80°C, add 200mL of n-hexane and 5% of the mass of perfluorohexyl iodane. % potassium hydroxide, reacted for 6h, cooled and filtered, washed with n-hexane, and the filtrate was distilled under reduced pressure to collect 80°C / 40mmHg fractions to obtain 3-perfluoro-n-hexyl-1,2-epoxypropane; add 0.1mol 3-perfluoro-n-hexyl-1,2-epoxypropane, 40mL methanol and 150mL ammonia water with a mass fraction of 28%, stirred for 12 hours, rotary evaporation to remove ammonia water and methanol, and then added 0.1mol 3-perfluoropr...

Embodiment 3

[0045] Composite blowing agents are made through the following steps:

[0046] S1. After mixing the mixed solution of cetylamine, isopropanol and deionized water evenly, add ammonia water with a mass fraction of 30%, under stirring at room temperature, add ethyl orthosilicate, after stirring for 1min, stop stirring and let it stand for 1d , filtered, washed with ethanol and distilled water, and roasted in vacuum at 630°C for 6h to obtain mesoporous silica; wherein, the ratio of hexadecylamine, ammonia water, and ethyl orthosilicate was 1g: 1.5mL: 5mL, iso The volume ratio of isopropanol to deionized water in the mixed solution of propanol and deionized water is 1:8; immerse the mesoporous silica in the double salt solution for 1 hour, then take out the mesoporous silica and bake it at 320°C for 2 hours. Take out the mesoporous silica, wash it with water until there is no chloride ion, and dry it to obtain the treated mesoporous silica, wherein the double salt solution is compo...

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Abstract

The invention discloses modified foaming polyurethane and a preparation method thereof, and belongs to the technical field of polyurethane. The modified foaming polyurethane is prepared from the following raw materials in parts by weight: 90 to 110 parts of a component A, 40 to 55 parts of a component B and 0.1 to 2 parts of modified polyborosiloxane. Organic fluorine modified polyborosiloxane is introduced into a foamed polyurethane system, so that the impact resistance of the foamed polyurethane is improved, and the impact resistance of the foamed polyurethane in a water environment is maintained. According to the organic fluorine modified polyborosiloxane, a fluorine-containing olefin monomer is used as one of monomers of polyborosiloxane, fluorine-containing chains are contained in fluorine-containing olefin monomer molecules, so that fluorine-containing chain branched chains are introduced into polyborosiloxane molecular chains, the fluorine-containing chains are prone to migration and aggregation to form a fluorine-containing chain layer, then contact between water and Si-O-B is prevented, the stability of the polyborosiloxane in the water environment is further improved, and the impact resistance of the foamed polyurethane in the water environment is maintained.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a modified foamed polyurethane and a preparation method thereof. Background technique [0002] Foamed polyurethane material is an excellent cushioning and energy-absorbing material, which is widely used in sports protection products, cushioning insoles, vibration protection and other fields. It is mostly formed by chemical reaction of isocyanate, polyol, foaming agent, foam stabilizer, catalyst and crosslinking agent. In practical applications, inorganic fillers are often added to the foaming material system to increase the impact resistance of foamed polyurethane and broaden its application range. For example, Chinese patent CN201710800808.1 discloses a submicron SiO 2 / The preparation method of polyethylene glycol modified foamed polyurethane composite material, submicron SiO 2 The non-Newtonian fluid material (STF) composed of polyethylene glycol is introdu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08L83/10C08K9/06C08K7/26C08J9/10C08G77/452
Inventor 史春晓史玉林
Owner CHUZHOU YULIN POLYURETHANE
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