Stabilizing compositions

a composition and composition technology, applied in the field of stabilizing compositions, can solve the problems of high cost of effective fluorochemical compounds used in grease- and oil-resistant treatments, and achieve the effects of enhancing the effectiveness of applied fluorochemical compounds, enhancing dispersion and solubility, and enhancing the efficiency of fluorochemical compounds

Inactive Publication Date: 2005-11-17
DAY JAMES F +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] The water soluble dispersant extender of the invention enhances the effectiveness of the applied fluorochemical compound. By using the present water soluble dispersant extender, an inclusion complex is formed whereby enhanced dispersion and solubility over the surface of the substrate allows more efficient use of the fluorochemical compound so that either less fluorochemical compound can be used to achieve the same level of grease and oil resistance or the same proportions of fluorochemical compound can be used for greater grease and oil resistance.

Problems solved by technology

Effective fluorochemical compounds used in grease- and oil-resistant treatments are very expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] In a starch sizing tank that feeds into a surface size press processing stage of a paper manufacturing process is batch cooked highly acid thinned hydroxyethylated starch. The water hardness is determined to be 0 ppm total hardness as CaCO3 without chelation. An oil and grease repellant composition containing a mixture of 80% di(perfluoro alkyl ethyl) phosphate ester diethanolamine salt and 20% mono perfluoroalkyl ethyl phosphate ester diethanolamine salt was used at rates of 0.20% actives in solution and was mixed into the starch sizing solution to make a finishing solution that was added to a size press at a usage rate of 350 cc / min along with 33.5 liter / min of hydroxyethylated starch makeup with about 50% starch solution pick up. Starch tank application system averaged 60° C. A sample of paper was taken from the rewinder after it was pressed and dried on the fourdrinier paper machine. Sample was tested for grease and oil resistance using a TAPPI T559 cm-02 test kit. The re...

example 2

[0023] One kilogram of Beta-Cyclodextrin was slurried in a 20 liter pail of 40° C. deionized water which dissolved clear, leaving behind a slight amount of residue.

[0024] The beta-cyclodextrin slurry was then added as a size press additive on a fourdrinier paper machine by directly pouring into a starch run tank with a known turn over of 15 minutes. Addition was made to approximate 8 minutes before a reel turn up on the dry end. The beta-cyclodextrin was used in conjunction with a di(perfluoroalkyl)ethyl phosphate ester, diethanolamine salt added by individual metering pump at 1000 cc / min.

[0025] Prior to beta cyclodextrin addition, off machine test kit response was 7 wire side / 7 felt side. Beta-cyclodextrin addition moved the kit response to 8 wire side / 8 felt side. Corresponding reduction is estimated at 25%. In light of the relative costs of beta-cyclodextrin and fluorochemical oil and grease repellant composition, the beta-cyclodextrin provides a cost effective extender for flu...

example 3

[0026] Efficacy of beta-cyclodextrin in a pilot fourdrinier machine paper laboratory was evaluated in the next several examples with commercially available aqueous dispersions of fluorochemicals. Using the paper industry standard compositions of hydroxyethylated starches, aqueous dispersions of commercially available fluorochemicals, and chelating agents, beta-cyclodextrin was substituted to demonstrate effect.

[0027] Acid thinned hydroxyethylated corn starch was batch cooked at 15% solids and cut to 5% solids prior to size press applications. 20 liter solutions of 5% hydroxyethylated starch used 10 gm of ethylenediamine tetraacetic acid (EDTA) chelating agent, 0.2% wt by actives of copolymers of 2-perfluoroalkylethyl acrylate, 2-N,N-diethylaminoethyl methacrylate, and glycidyl methacrylate replaced the fluorochemical formulation used in example 1. Tests with the TAPPI T559 cm-02 showed repellence scores of 7 wire side / 7 felt side.

[0028] The addition of 1.5 gm (75 mg / l) of powdered...

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Abstract

A water soluble dispersant extender enhances the effectiveness and stability of hydrophobic compounds applied from aqueous solution. The invention is well suited for fluorochemical compounds applied to a substrate to impart grease and oil resistance. Exemplary substrates include paper, textiles, nonwoven, carpet and the like. The invention is also useful in firefighting foams that employ hydrophobic fluorochemical fire suppressing compounds. The present stabilizer is believed to form an inclusion complex with the hydrophobic compound whereby enhanced dispersion and solubility over the surface of the substrate allows more efficient use of the hydrophobic compound so that either less compound can be used with the same efficacy or greater efficacy is seen with the same level of active ingredient.

Description

FIELD OF THE INVENTION [0001] The invention relates to an improvement in compositions used in treatments for paper, fiber, nonwoven, textile, and carpets and in firefighting foam compositions. The invention is particularly useful for stabilizing treatment ingredients that impart grease, oil, and water resistance to a treated substrate. The present composition is particularly suitable for aqueous treatments that impart or enhance oil, grease, and water resistance to the finished product. BACKGROUND OF THE INVENTION [0002] Fluorochemicals of one or more types are used to impart resistance to grease, oil, and water. See, U.S. Pat. Nos. 4,590,129; 5,252,754; 5,492,599; 5,674,961; 6,218,464 and published U.S. application Ser. No. 2003 / 0217824, the disclosures of which are herein incorporated by reference. [0003] Multiple tests have been devised to measure and evaluate fluorochemical treatments of paper. See, U.S. Pat. No. 5,674,961. One common test is known as the “Kit Test” (TAPPI T559 ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D21H17/03D21H17/06D21H21/16
CPCD21H21/16D21H17/06
Inventor DAY, JAMES F.YOUNG, DREW H.
Owner DAY JAMES F
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