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Preparation method of emulsion for improving strength and toughness of foam plastic

A foam plastic, strong toughness technology, applied in the field of foam plastic modification, can solve the problems of limited breaking strength and elastic properties, easy to break during transportation, low strength, etc., achieve low price, improve mechanical properties, and reduce broken effects

Inactive Publication Date: 2018-12-28
德清舒华泡沫座椅有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that most of the rigid polyurethane foams produced in the prior art have high brittleness and low strength, their tensile strength, breaking strength and elastic properties are very limited or even poor, and they are easily broken during transportation and use. The invention provides a method for preparing an emulsion that can directly strengthen the polyurethane foam that has been prepared or prepared by the existing processing line to improve the strength and toughness of the foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method for the emulsion that is used to improve foam toughness, described preparation method comprises following preparation steps:

[0026] 1) dissolving sodium carbonate in water to prepare a 3.75mol / L sodium carbonate solution, mixing it with 3 times the volume of polyoxyethylene sorbitan monooleate, stirring evenly to obtain the bottom liquid;

[0027] 2) Add 0.1 times the volume of 22wt% stearic acid ethyl ether solution to the bottom liquid obtained in step 1) and stir, the stirring speed is 120r / min, slowly add 0.05 times the volume of 30wt% oleic acid to the bottom liquid during stirring Sodium aqueous solution, continue to stir until uniform, then add 15wt% starch slurry aqueous solution of 0.005 times the volume of the bottom liquid, stir and mix evenly to obtain a mixed solution;

[0028] 3) Add pentasodium triphosphate accounting for 0.05wt% of the mixed solution to the mixed solution obtained in step 2), stir it at a speed of 800 r / min...

Embodiment 2

[0031] A kind of preparation method for the emulsion that is used to improve foam toughness, described preparation method comprises following preparation steps:

[0032] 1) dissolving sodium carbonate in water to prepare a 4.55mol / L sodium carbonate solution, mix it with 5 times its volume of polyoxyethylene sorbitan monooleate, and stir to obtain the bottom liquid;

[0033] 2) Add 0.3 times the volume of 22wt% stearic acid ethyl ether solution to the bottom liquid obtained in step 1) and stir, the stirring speed is 180r / min, slowly add 0.1 times the volume of the bottom liquid 30wt% oleic acid during stirring Sodium aqueous solution, continue to stir until uniform, then add 15wt% starch slurry aqueous solution of 0.008 times the volume of the bottom liquid, stir and mix evenly to obtain a mixed solution;

[0034] 3) Add pentasodium triphosphate accounting for 0.08wt% of the mixed solution to the mixed solution obtained in step 2), stir it at a speed of 1000 r / min, add dropwis...

Embodiment 3

[0037] A kind of preparation method for the emulsion that is used to improve foam toughness, described preparation method comprises following preparation steps:

[0038] 1) dissolving sodium carbonate in water to prepare a 3.95mol / L sodium carbonate solution, mix it with 4 times its volume of polyoxyethylene sorbitan monooleate, and stir to obtain the bottom liquid;

[0039]2) Add 0.15 times the volume of 22wt% stearic acid ethyl ether solution to the bottom liquid obtained in step 1) and stir, the stirring speed is 160r / min, slowly add 0.08 times the volume of the bottom liquid 30wt% oleic acid during stirring Sodium aqueous solution, continue to stir until uniform, then add 15wt% starch slurry aqueous solution of 0.005 times the volume of the bottom liquid, stir and mix evenly to obtain a mixed solution;

[0040] 3) Add pentasodium triphosphate accounting for 0.05wt% of the mixed solution to the mixed solution obtained in step 2), stir it at a speed of 800 r / min, add dropwis...

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Abstract

The invention relates to the field of foam plastic modification, in particular to a preparation method of emulsion for improving the strength and toughness of a foam plastic. The preparation method comprises the following steps: 1) dissolving sodium carbonate in water to prepare a sodium carbonate solution, mixing the sodium carbonate solution with polyoxyethylene sorbitan monooleate, and uniformly stirring to obtain a base solution; 2) adding a stearic acid diethyl ether solution into the base solution, carrying out stirring, slowly adding a sodium oleate aqueous solution during stirring, continuously stirring until the materials are stirred uniformly, adding a starch slurry aqueous solution, stirring and mixing the materials uniformly to obtain a mixed solution; and 3) adding pentasodiumtriphosphate into the mixed solution, stirring the mixed solution, adding a calcium chloride solution dropwise in the stirring process until uniform emulsion is formed, thus obtaining the emulsion for improving the strength and toughness of the foam plastic.

Description

technical field [0001] The invention relates to the field of modification of foamed plastics, in particular to a method for preparing an emulsion for improving the strength and toughness of foamed plastics. Background technique [0002] Polyurethane foam is made of isocyanate and hydroxyl compound through polymerization and foaming. According to its hardness, it can be divided into two types: soft and hard, of which soft is the main variety. Generally speaking, it has excellent elasticity, softness, elongation and compressive strength; good chemical stability, resistance to many solvents and oils; excellent abrasion resistance, 20 times larger than natural sponge; and excellent processing It is a kind of cushioning material with excellent performance, but the price is relatively high. Rigid polyurethane foam is mostly used in transportation packaging and other fields, which has a good cushioning and shock absorption effect and is low in price. [0003] However, rigid polyu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/42C08L75/04
CPCC08J9/40C08J9/42C08J2375/04
Inventor 卢伟蔡盼盼
Owner 德清舒华泡沫座椅有限公司