Claims
- 1. A porous crosslinked polymeric material having an absorbency ratio of Syn-Urine vertical wicking time to decane vertical wicking time of greater than 10 produced by the process comprising the steps of:
- (a) providing a water-in-oil emulsion comprising (i) a mixture of polymerizable monomers comprising at least one vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a multifunctional unsaturated crosslinking monomer, (ii) at least 90 weight percent, based on the emulsion, of water as the internal phase, (iii) an effective amount of a surfactant comprising at least one saccharide fatty acid ester to produce the water-in-oil emulsion, and (iv) an effective amount of at least one polymerization initiator to polymerize and crosslink the polymerizable monomers; and
- (b) heating the water-in-oil emulsion under conditions effective to polymerize and crosslink the polymerizable monomers, and
- (c) removing at least a portion of the water in said crosslinked emulsion.
- 2. A porous crosslinked vinyl polymeric foam material having incorporated therein at least one saccharide fatty acid ester.
- 3. A porous crosslinked vinyl polymeric foam material of claim 2 having a dry density of less than 0.1 g/cc formed from a water-in-oil emulsion, said emulsion containing at least 90% by weight water.
- 4. A porous crosslinked vinyl polymeric foam material of claim 2 having a dry density of less than 0.1 g/cc and an absorbency ratio of Syn-Urine vertical wicking time to decane vertical wicking time of greater than 10.
- 5. A curable water-in-oil emulsion composition comprising:
- (a) a mixture of polymerizable monomers comprising at least one vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a multifunctional unsaturated crosslinking monomer;
- (b) at least 90 weight percent, based on the emulsion, of water as the internal phase;
- (c) an effective amount of a surfactant comprising at least one saccharide fatty acid ester to produce the curable water-in-oil emulsion; and
- (d) an effective amount of a polymerization initiator to polymerize and crosslink the polymerizable monomers.
- 6. The composition of claim 5 wherein the saccharide fatty acid ester is a fatty acid ester of a saccharide having the formula C.sub.n (H.sub.2 O).sub.n-r wherein r is an integer from 0 to 3 and 3 (r+1).ltoreq.n.ltoreq.10(r+1) .
- 7. The composition of claim 5 wherein the saccharide fatty acid ester is partially alkylated in the hydroxyl positions of the saccharides.
- 8. The composition of claim 6 wherein the saccharide fatty acid ester has at least one fatty acid ester moiety having C.sub.8 to C.sub.22 hydrocarbyl sequent.
- 9. The composition of claim 6 wherein the saccharide fatty acid ester has an ester value within the range of about 100 mg to 250 mg KOH/g or hydroxyl value within the range of about 100 to about 500 mg KOH/g.
- 10. The composition of claim 9 wherein the saccharide fatty acid ester has at least one fatty acid ester moiety having C.sub.12 to C.sub.20 hydrocarbyl segment.
- 11. The composition of claim 10 wherein the saccharide fatty acid ester has an ester value within the range of about 100 mg to 250 mg KOH/g and hydroxyl value within the range of about 100 to about 500 mg KOH/g.
- 12. The composition of claim 5 wherein the saccharide fatty acid ester is selected from the group consisting of fatty acid esters of sucrose, fructose, galactose, glucose, lactose, maltose, mannose, arabitol, mannitol, xylitol, erythritol and raffinose.
- 13. The composition of claim 5 in which the vinyl monomer is selected from the group consisting of monoalkenyl arenes, acrylate or methacrylate esters, conjugated diolefins, allenes, olefin halides, and mixtures thereof.
- 14. The composition of claim 13 in which the multifunctional unsaturated crosslinking monomer is selected from the group consisting of divinyl benzene, diethylene glycol dimethacrylate, 1,3-butanediol dimethacrylate, allyl methacrylate trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, glucose pentaacrylate, glucose diethylmercaptal pentaacrylate, sorbitan triacrylate, sucrose per(meth)acrylate, and cellulose (meth)acrylate.
- 15. The composition of claim 6 in which the water-in-oil emulsion comprises as the internal phase, at least about 95 weight percent, based on the emulsion, of water.
- 16. The composition of claim 5 in which the surfactant is present in an amount from above about 0.1 weight percent to about 40 weight percent based on the polymerizable monomers.
- 17. The composition of claim 3 in which the surfactant further comprises at least one sorbitan fatty acid ester.
- 18. The composition of claim 5 in which the saccharide fatty acid ester is a disaccharide difatty acid ester.
Parent Case Info
This is a division of application Ser. No. 08/114,557, filed Aug. 30, 1993, now U.S. Pat. No. 5,306,733.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
04016194A |
Jan 1992 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Crodata Inc, New York, N.Y., Advantages of Sucrose Esters in Formulating Cosmetic Creams And Lotions, Cosmetics & Toiletries, vol. 95, No. 3, pp. 70-73, Mar. 1980. |
Crodesta Sucrose Fatty Acid Esters, Crodata: Nov. 26, 1980, pp. 1-7. |
Divisions (1)
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Number |
Date |
Country |
Parent |
114557 |
Aug 1993 |
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