Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1994-10-26
1996-12-31
Nutter, Nathan M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536 30, 536 36, 536 38, 536 45, 536 48, 536 553, 536 58, 536 63, 428532, 528 86, 521 50, C07H 1900
Patent
active
055895778
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/FI94/00119 filed Mar. 30, 1994.
THE TECHNICAL FIELD
The invention is related to highly substituted, water-insoluble, poorly water-permeable fatty acid esters of polysaccharides and compositions comprising said polysaccharides suitable for use in hot-melt adhesives and as coatings for active ingredients.
The invention also relates to a method of preparing highly substituted fatty acid esters of polysaccharides, especially hexosans and pentosans, especially starch but also xylan.
THE BACKGROUND OF THE INVENTION
The application of polymers derived from renewable natural resources as the initial material in various products is becoming increasingly common and important. Such products are biodegradable and thus do not cause problems even as waste. Awareness of environmental problems has made the use of native polysaccharides and their derivatives highly desirable. Thus, it would be desirable if biodegradable polysaccharides from nature or derivatives thereof could be used as a partial raw material for preparing adhesives and coatings for different active ingredients, such as pharmaceuticals and fertilizers.
Green thinking and emphasis of nature-friendliness are creating new markets for products based on renewable natural resources. Such trends are visible, for example, in the packaging industry, where recyclability, reuse, compostability, biodegradability are some of the requirements of today. Of course, the requirements are imposed on all components of packaging, also on hot melt adhesives, one of the principal areas of use of hot melt adhesives being the packaging industry. Corresponding trends are observable also in other major areas of use of hot melt adhesives, such as non-woven products (diapers, sanitary napkins, etc.), in which friendliness to the environment and non-hazardousness are emphasized. Also clearly visible is a trend to replace petrochemical products with biopolymer products.
The product of the present invention is a product suitable for use as a component in hot melt adhesives. Hot melt adhesives are often composed of three principal components: a thermoplastic polymer, a tackifier and wax. In addition, small amounts of various additives are used for controlling the properties of the adhesive. The most common conventional tackifiers used in hot melt adhesives are derivatives of tall oil resin or hydrocarbon resins. The adhesives also contain wafers. The most commonly used waxes are synthetic PE waxes. In other words, the major proportion of the raw materials contained in hot melt adhesives are products from the petrochemical industry.
The use of polymers derived from renewable natural resources, especially starch and hemicellulose compounds, as the initial material in various applications has become increasingly common. These new products are usually more or less biodegradable and thus do not cause problems even as waste. Awareness of environmental problems has made the use of polysaccharides from nature and their semisynthetic derivatives especially desirable. At the same time the demand for development of new more advantageous, modified methods has become increasingly important and timely. It is desirable that these new methods can be used with a good yield and that the end product can be isolated easily. It is desirable that the solvents and byproducts can be recovered and reused without difficulties.
The methods of preparing fatty acid esters of polysaccharides are generally known and constitute knowledge belonging to basic chemistry. These methods can, however, be modified and optimized in order to produce as easily and economically as possible the most suitable compounds for the specific applications.
The state-of-the-art methods do not fulfill the requirements of the method described in the present invention. The degree of substitution of the products is usually too low. Therefore the products are not sufficiently hydrophobic. Even if their degree of substitution were higher, their permeability to water would probably be too high for our applicat
REFERENCES:
patent: 2893990 (1959-07-01), Hass
patent: 3666492 (1972-05-01), Teng
patent: 4231803 (1980-11-01), Bovier et al.
Harju Kai
Peltonen Soili
Alko Group Ltd.
Nutter Nathan M.
Truong Duc
LandOfFree
Applications and methods for the preparation of fatty acid ester does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Applications and methods for the preparation of fatty acid ester, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Applications and methods for the preparation of fatty acid ester will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1142909