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Melamine modified polyvinylalcohol formal foam, preparation and uses thereof

A technology of polyvinyl formal and melamine, applied in separation methods, chemical instruments and methods, medical science, etc., can solve problems such as environmental pressure and cost rise, and achieve increased interaction force, low cost and environmental impact, and preparation The effect of simple process

Inactive Publication Date: 2009-08-19
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implementation of the above method directly leads to cost increase and environmental pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Formula: 100 grams of polyvinyl alcohol, 1000 grams of water, 2 grams of melamine, 40 grams of formaldehyde, 5 grams of diethanolamine, 5 grams of sodium dodecylbenzenesulfonate, and 120 grams of hydrochloric acid. Prepare the melamine-modified polyvinyl formal foam material according to the following steps.

[0036] 1) Add polyvinyl alcohol and water into the reactor under stirring, heat to 95°C, and dissolve for 60 minutes.

[0037] 2) Control the temperature to 70°C, add formaldehyde, melamine and diethanolamine, and react for 30 minutes.

[0038] 3) Control the temperature at 50°C, add sodium dodecylbenzenesulfonate and hydrochloric acid, stir evenly, discharge the material, and inject it into the mold.

[0039] 4) Keep warm at 50°C for 5 hours.

[0040] 5) Remove the mold, wash the waste liquid, and dry.

[0041] 6) Process it into the desired shape with a lathe or a blade.

Embodiment 2

[0043] Formula: 100 grams of polyvinyl alcohol, 1000 grams of water, 4 grams of melamine, 40 grams of formaldehyde, 5 grams of diethanolamine, 20 grams of starch, 5 grams of sodium dodecylbenzenesulfonate, and 150 grams of hydrochloric acid.

[0044] Prepare the melamine-modified polyvinyl formal foam material according to the following steps.

[0045] 1) Add polyvinyl alcohol and water into the reactor under stirring, heat to 60°C, and dissolve for 30 minutes.

[0046] 2) Control the temperature at 60°C, add formaldehyde, melamine, starch and diethanolamine, and react for 10 minutes.

[0047] 3) Control the temperature at 30°C, add sodium dodecylbenzenesulfonate, foaming agent and hydrochloric acid, stir evenly, discharge the material, and inject it into the mold.

[0048] 4) Keep warm at 40°C for 3 hours.

[0049] 5) Remove the mold, wash the waste liquid, and dry.

[0050] 6) Process it into the desired shape with a lathe or a blade.

Embodiment 3

[0052] Formula: 100 grams of polyvinyl alcohol, 1000 grams of water, 6 grams of melamine, 40 grams of formaldehyde, 5 grams of diethanolamine, 5 grams of alkylphenol polyoxyethylene ether, 5 grams of sodium carbonate, and 150 grams of sulfuric acid.

[0053] Prepare the melamine-modified polyvinyl formal foam material according to the following steps.

[0054]1) Add polyvinyl alcohol and water into the reactor under stirring, heat to 100°C, and dissolve for 180 minutes.

[0055] 2) Control the temperature at 80°C, add formaldehyde, melamine and ethanolamine, and react for 60 minutes.

[0056] 3) Control the temperature at 60°C, add OP-10, sodium carbonate and sulfuric acid, stir evenly, discharge the material, and inject it into the mold.

[0057] 4) Keep warm at 60°C for 6 hours.

[0058] 5) Remove the mold, wash the waste liquid, and dry.

[0059] 6) Process it into the desired shape with a lathe or a blade.

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Abstract

The invention relates to a melamine modified polyvinyl formal foam material and a preparation method thereof. The foam material is prepared by proportionally mixing and reacting among polyvinyl alcohol, melamine, formaldehyde, an acidic catalyst, a basic catalyst, an emulsifier, a foaming agent, a pore former, an adjuvant and the like. The foam material has the advantages of simple preparation process, adjustable aperture ratio, high mechanical strength and good temperature resistance, and can be widely used as medical sponge, filtering material, sound insulation protection material, wiping and dedusting material and biological carrier material.

Description

technical field [0001] The invention relates to a polyvinyl formal foam material, in particular to a melamine-modified polyvinyl formal foam material and a preparation method and application thereof. Background technique [0002] Polyvinyl formal foam material is a foam material with controllable porosity, good chemical resistance and biocompatibility, and has good hygienic safety and secondary processing performance. [0003] According to the relationship between formalization and foam formation, the preparation methods of polyvinyl formal foam materials can be divided into two categories: [0004] (1) The polyvinyl alcohol aqueous solution containing bubbles or soluble substances reacts with formaldehyde in the presence of acid, and when a certain degree of acetalization is reached, the polyvinyl acetal is separated from the hydroformylation solution and becomes cloudy Melting and precipitation, while the air bubbles are fixed or the foam material is formed due to the dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/28C08F8/30C08J9/08A61L15/24B01D39/04
Inventor 庞浩陈永廖兵姜玉
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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