Degradable polymeric compositions and articles comprising same
US-2024425683-A1 · Dec 26, 2024 · US
Ethylcellulose dispersion and powder
US2017226329A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017226329-A1 |
| Application number | US-201515502804-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 12, 2015 |
| Priority date | Aug 15, 2014 |
| Publication date | Aug 10, 2017 |
| Grant date | — |
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Abstract
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Provided is an aqueous composition having pH of 8 or higher and comprising (i) a solid phase comprising dispersed particles that comprise ethylcellulose polymer, (ii) fatty acid, wherein 25 mole % to 100 mole % of said fatty acid is in ionic form, (iii) 0% to 0.1% colloid stabilizer, by weight based on the dry weight of said ethylcellulose polymer, (iv) 0% to 7% plasticizer, by weight based on the dry weight of said ethylcellulose polymer, and (v) one or more cations of an alkali metal or an alkaline earth, wherein the equivalent ratio of said cations to said fatty acid is 0.1:1 to 2:1. Also provided are a method of spray drying an aqueous composition and a powder composition.
First claim
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1 . An aqueous composition having pH of 8 or higher and comprising (i) a solid phase comprising dispersed particles that comprise an amount of ethylcellulose polymer, (ii) 0.5% to 7% fatty acid, by weight based on the total dry weight of the solid phase, wherein 25 mole % to 100 mole % of said fatty acid is in ionic form, (iii) 0% to 0.1% colloid stabilizer, by weight based on the dry weight of said ethylcellulose polymer, (iv) 0% to 7% plasticizer, by weight based on the dry weight of said ethylcellulose polymer, and (v) one or more cations of an alkali metal or of an alkaline earth, wherein the equivalent ratio of said cations to said fatty acid is 0.1:1 to 2:1. 2 . The aqueous composition of claim 1 , wherein the amount of said ethylcellulose polymer is 45% to 90% by weight based on the dry weight of said solid phase. 3 . The aqueous composition of claim 1 , wherein said ethylcellulose powder has viscosity of 16-30 mPa-s, wherein the viscosity of said ethylcellulose powder is defined as the viscosity of a 5 weight percent solution of said ethylcellulose polymer in a solvent, based on the weight of the solution, wherein the solvent is a mixture of 80% toluene and 20% ethanol by weight based on the weight of the solvent. 4 . The aqueous composition of claim 1 , wherein the equivalent ratio of said cations to said fatty acid is 0.5:1 to 2:1. 5 . The aqueous composition of claim 1 , wherein the equivalent ratio of said cations to said fatty acid is 0.2:1 to 1:1 wherein said aqueous composition additionally comprises one or more fugitive bases, and wherein the equivalent ratio of cations of said fugitive base to said fatty acid is 0.2:1 to 1:1. 6 . A method of making a powder comprising spray drying the aqueous composition of claim 1 . 7 . A powder composition comprising (a) 0% to 2% water by weight based on the weight of said powder composition, (b) particles that comprise (I) an amount of ethylcellulose polymer, (II) 0.5% to 7% fatty acid, by weight based on the weight of said powder composition, wherein 25 mole % to 100 mole % of said fatty acid is in the form of an alkali metal or alkaline earth salt, (III) 0% to 0.1% colloid stabilizer, by weight based on the dry weight of said ethylcellulose polymer, (IV) 0% to 7% plasticizer, by weight based on the dry weight of said ethylcellulose polymer. 8 . The powder of claim 7 , wherein the amount of said ethylcellulose polymer is 45% to 90% by weight based on the dry weight of said powder. 9 . The powder composition of claim 7 , wherein said ethylcellulose powder has viscosity of 16-30 mPa-s, wherein the viscosity of said ethylcellulose powder is defined as the viscosity of a 5 weight percent solution of said ethylcellulose polymer in a solvent, based on the weight of the solution, wherein the solvent is a mixture of 80% toluene and 20% ethanol by weight based on the weight of the solvent.
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- What does patent US2017226329A1 cover?
- Provided is an aqueous composition having pH of 8 or higher and comprising (i) a solid phase comprising dispersed particles that comprise ethylcellulose polymer, (ii) fatty acid, wherein 25 mole % to 100 mole % of said fatty acid is in ionic form, (iii) 0% to 0.1% colloid stabilizer, by weight based on the dry weight of said ethylcellulose polymer, (iv) 0% to 7% plasticizer, by weight based on …
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08L1/28. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 10 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).