Reduction of unpolymerized monomers in high internal phase emulsion foam

Inactive Publication Date: 2011-06-30
THE PROCTER & GAMBNE CO
View PDF56 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]A method is provided for producing a High Internal Phase Emulsion foam comprising the steps of forming a High Internal Phase Emulsion from an oil phase comprising monomer, cross-linking agent, emulsifier; photoinitiator; and an aqueous phase; depositing the High Internal Phase Emulsion on a belt; polymerizing the monomer component in the oil phase of the High Internal Phase Emulsion using a polymerization reaction that is conducted at a temperature of from about 25° C. to about 150° C. for a time sufficient to form a High Internal Phase Emulsion foam; and reducing the amount of unpolymerized monomer in the High Internal Phase Emulsion foam to less than 400 ppm by exposing the High Internal Phase Emulsion foam to UV light from a UV light source.
[0007]A method is provided for producing a High Internal Phase Emulsion foam comprising the steps of forming a first High Internal Phase Emuls

Problems solved by technology

However, after the addition of initiator and the curing process not all of the monomers are polymerized.
These residual unpolymerized monomers can cause problems both in the HIPE foam and the process used to prepare the HIPE foams.
If unreacted monomers are present in the HIPE foam they may pose a safety concern at certain levels, adversely affect the desired HIPE foam properties or interfere with the further HIPE f

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduction of unpolymerized monomers in high internal phase emulsion foam
  • Reduction of unpolymerized monomers in high internal phase emulsion foam
  • Reduction of unpolymerized monomers in high internal phase emulsion foam

Examples

Experimental program
Comparison scheme
Effect test

Example

EXAMPLE

[0042]Preparation of High Internal Phase Emulsions (HIPE) and their subsequent polymerization into absorbent foams are illustrated in the following example. The HIPE samples comprised two layers—a bottom layer and a top layer, wherein the bottom layer had a smaller average pore size of 30 microns and the top layer had a larger average pore size of about 80 microns.

[0043]A. Small Cell Layer HIPE Formation

[0044]Small Cell Layer Components:

[0045]To prepare the bottom small cell layer of the HIPE the aqueous phase, oil phase, and initiator contained the following components as shown below in Table 1.

TABLE 1% Amount Based onOil PhaseTotal Weight of Oil Phase2-ethylhexyl acrylate (EHA)36.7%2-ethylhexyl methacrylate (EHMA)37.61%ethyleneglycol dimethacrylate (EGDMA)17.43%dimethyl ammonium methyl sulfate0.93%(DTDMAMS)Polyglycerol succinate (PGS)6.48%Photoinitiator - Darocur 1173*0.99%Aqueous Phase% Amount Based on Total Weight of Aqueous PhaseCaCl23.85%Water:oil ratio26:1% Amount Base...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Login to view more

Abstract

A method for using Ultraviolet light to reduce the level of unpolymerized monomer in a High Internal Phase Emulsion (HIPE) foam.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 290,947 filed on 30 Dec. 2009, the substance of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]This application relates to a process for the reduction of unpolymerized monomers in High Internal Phase Emulsion (HIPE) foam.BACKGROUND OF THE INVENTION[0003]An emulsion is a dispersion of one liquid in another liquid and generally is in the form of a water-in-oil mixture having an aqueous or water phase dispersed within a substantially immiscible continuous oil phase. Water-in-oil (or oil in water) emulsions having a high ratio of dispersed aqueous phase to continuous oil phase are known in the art as High Internal Phase Emulsions, also referred to as “HIPE” or HIPEs. At relatively high dispersed aqueous phase to continuous oil phase ratios the continuous oil phase becomes essentially a thin film separating and coating the droplet-like structures ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F2/46B29C48/08B29C48/355
CPCB29C33/68B29C41/28B29C44/28B29C44/60B29C47/0021C08J2201/028B29C47/34B29C67/202B29C2947/9298B29K2105/04B29C47/0872B29C48/08B29C48/269B29C48/355B29C2948/9298C08J9/28C08F2/24C08F2/48C08F20/10C08F2/50C08F120/10
Inventor MERRIGAN, STEVEN RAYDESMARAIS, THOMAS ALLEN
Owner THE PROCTER & GAMBNE CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products