Solid-state method for treating polyamide and polyester articles
US12291611B2 · kind B2 · utility
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7References
20Claims
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Key dates
| Filing date | Sep 15, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Sep 15, 2043 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2200/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Solid-state branching and/or crosslinking of aliphatic polyamide or polyester articles is achieved using a topical approach. A surface of the article is coated with a composition that includes a polyene and a free radical initiator. The article and applied coating are then heated to induce branching and/or crosslinking in the polyamide or polyester. This is performed below the crystalline melting temperature of the polyamide or polyester, or in the case of a fabric, below the melting temperature of the fibers in the fabric. Fabrics treated in this manner exhibit reduced or even no dripping in vertical flame tests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.