Cleaning compositions for solid surfaces – auxiliary compositions – With oxygen – halogen – sulfur – or nitrogen containing or... – Carboxylic or thiocarboxylic ester function in the component
Patent
1999-06-10
2000-12-26
Hardee, John R.
Cleaning compositions for solid surfaces, auxiliary compositions
With oxygen, halogen, sulfur, or nitrogen containing or...
Carboxylic or thiocarboxylic ester function in the component
510519, C11D 350
Patent
active
061659533
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an improvement in dryer activated, e.g., dryer-added, softening products, compositions, and/or the process of making these compositions containing .beta.-ketoester pro-fragrance compounds and methods for accomplishing the delivery of such organic pro-fragrance compounds to textile articles and other surfaces dried with said compositions. These products and/or compositions are either in particulate form, compounded with other materials in solid form, e.g., tablets, pellets, agglomerates, etc., or preferably attached to a substrate. The fragrance is released in fragrance-active form when the dried surface is subsequently contacted with a lower pH environment such as contact with water, carbon dioxide gas, humid air, or the like.
BACKGROUND OF THE INVENTION
Consumer acceptance of laundry products is determined not only by the performance achieved with these products but the aesthetics associated therewith. The perfume systems are therefore an important aspect of the successful formulation of such commercial products.
What perfume system to use for a given product is a matter of careful consideration by skilled perfumers. While a wide array of chemicals and ingredients are available to perfumers, considerations such as availability, cost, and compatibility with other components in the compositions limit the practical options. Thus, there continues to be a need to efficient, low-cost, compatible perfume materials useful for laundry compositions.
Furthermore, due to the high energy input and large air flow in the drying process used in the typical automatic laundry dryers, a large part of most perfumes provided by fabric softener products is lost from the dryer vent. Perfume can be lost even when the fabrics are line dried. The amount of perfume carry-over from a laundry process onto fabrics is often marginal and does not last long on the fabric. Fragrance materials are often very costly and inefficient use in rinse added and dryer added fabric softener compositions and ineffective delivery to fabrics results in a very high cost to both consumers and fabric softener manufacturers. Industry, therefore, continues to look for more efficient and effective fragrance delivery in fabric softener products, especially for improvement in the provision of long-lasting fragrance to the dried fabrics.
BACKGROUND ART
General ester chemistry is described in Carey et al., Advanced Organic Chemistry, Part A, 2nd Ed., pp. 421-426 (Plenum, N.Y.; 1984).
Compositions of fragrance materials (having certain values for Odour Intensity Index, Malodour Reduction Value and Odour Reduction Value) said to be used as fragrance compositions in detergent compositions and fabric conditioning compositions are described in European Patent Application Publication No. 404,470, published Dec. 27, 1990 by Unilever PLC. Example 1 describes a fabric-washing composition containing 0.2% by weight of a fragrance composition which itself contains 4.0% geranyl phenylacetate. A process for scenting fabrics washed with lipase-containing detergents is described in PCT application No. WO 95/04809, published Feb. 16, 1995 by Firmenich S.A.
Esters of perfume alcohols are known in the art for providing extended delivery of fragrances in fabric softening compositions. See, for example, U.S. Pat. No. 5,531,910, Severns, issued Jul. 2, 1996. However, the manufacture of pro-fragrant esters known in the art can present costly and significant synthetic challenges. Derivitization of tertiary fragrance alcohols into simple esters is particularly difficult, often resulting in low yields and increased levels of less desirable side products. Therefore, industry continues to seek improved alternatives for generating pro-fragrances through economic and effective means.
It has now surprisingly been discovered that these problems can unexpectedly be overcome by the use of .beta.-ketoesters as pro-fragrances in dryer added compositions. The hydrophobic .beta.-ketoesters of the present invention demonstrate improved substanti
REFERENCES:
patent: 4433695 (1984-02-01), Hall et al.
patent: 5668102 (1997-09-01), Severns et al.
Costa Jill Bonham
Ditullio, Jr. Daniel Dale
Gardlik John Michael
Littig Janet Sue
Ortiz Rafael
Echler, Sr. R. S.
Hardee John R.
Rasser J. C.
The Procter & Gamble & Company
Zerby K. W.
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