Composition comprising semi-crystalline polyolefin and sulfonyl-azide, resulting foams and methods of making the same
US10669413B2 · kind B2 · utility
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7References
22Claims
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Key dates
| Filing date | Jan 29, 2016 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Jun 5, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A foamable composition includes a semi-crystalline polyolefin having a crystallinity of at least 50% and a poly(sulfonyl azide) of at least 500 ppm based on the total weight of the foamable composition. The foamable composition has a melt strength of at least 20 cN, a melt drawability of at least 100 mm/s, flexural modulus is greater than about 240,000 psi. Such a composition can be used to make a low density foam having a density in the range from 0.005 g/cm3 to 0.6 g/cm3. A resulting foam or a fabricated article, the methods of the composition and the foam are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.