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US-10280486-B2 · May 7, 2019 · US
Process for forming synthetic leather
US11834780B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11834780-B2 |
| Application number | US-201817267930-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 21, 2018 |
| Priority date | Aug 21, 2018 |
| Publication date | Dec 5, 2023 |
| Grant date | Dec 5, 2023 |
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Abstract
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Provided are a process, the process includes (i) first, contacting a textile with an aqueous solution containing a cationic hydroxyethylcellulose polymer to form a modified textile component; (ii) subsequently, impregnating the modified textile component with an aqueous polyurethane dispersion externally stabilized with an anionic surfactant, the aqueous polyurethane dispersion including a second surfactant; and (iii) precipitating the polyurethane in the modified textile component. Also disclosed are a synthetic leather produced by the process.
First claim
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We claim: 1. A process comprising: (i) first, contacting a textile with an aqueous solution comprising a cationic hydroxyethylcellulose polymer to form a modified textile component; (ii) subsequently, impregnating the modified textile component with an aqueous polyurethane dispersion externally stabilized with an anionic surfactant, the aqueous polyurethane dispersion comprising a second surfactant; and (iii) precipitating the polyurethane in the modified textile component. 2. The process of claim 1 comprising (iv) forming a synthetic leather. 3. The process of claim 1 comprising selecting a cationic hydroxyethylcellulose polymer that is a hydroxyethylcellulose polymer with a quaternary ammonium cation group. 4. The process of claim 1 comprising selecting a cationic hydroxyethylcellulose polymer having a weight average molecular weight (Mw) from 100,000 Dalton to 3,000,000 Dalton. 5. The process of claim 1 comprising selecting the second surfactant from the group consisting of a zwitterionic surfactant, a nonionic surfactant, and combinations thereof. 6. The process of claim 1 comprising dissolving the second surfactant in the aqueous polyurethane dispersion; and forming the aqueous polyurethane dispersion comprising from 0.5 wt % to 5.0 wt % of the second surfactant, based on the total weight of the aqueous polyurethane dispersion. 7. The process of claim 1 comprising maintaining, during the impregnating, a Cation:Anion Ratio from 0.1 to 10. 8. The process of claim 1 comprising drying the modified textile component before impregnating the modified textile component with the aqueous polyurethane dispersion. 9. The process of claim 1 comprising forming a synthetic leather comprising from 35 wt % to 70 wt % polyurethane. 10. A synthetic leather produced by the process of claim 1 .
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Frequently asked questions
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- What does patent US11834780B2 cover?
- Provided are a process, the process includes (i) first, contacting a textile with an aqueous solution containing a cationic hydroxyethylcellulose polymer to form a modified textile component; (ii) subsequently, impregnating the modified textile component with an aqueous polyurethane dispersion externally stabilized with an anionic surfactant, the aqueous polyurethane dispersion including a seco…
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Rohm & Haas
- What technology area does this patent fall under?
- Primary CPC classification D06N3/14. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Dec 05 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).