Process for producing expanded polyolefin resin particles and expanded polyolefin resin particles
US-9216525-B2 · Dec 22, 2015 · US
Method for production expanded polyester foam particles
US2016244584A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016244584-A1 |
| Application number | US-201415028357-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 29, 2014 |
| Priority date | Oct 9, 2013 |
| Publication date | Aug 25, 2016 |
| Grant date | — |
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Abstract
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A process for producing expanded foam beads from pellets comprising at least one biodegradable polyester. The process comprises (i) producing a suspension comprising pellets in an aqueous suspension medium, (ii) impregnating the pellets present in the suspension from step (i) with at least one physical blowing agent by heating the pellet suspension to a depressurization temperature IMT, with stirring, to provide pellets laden with blowing agent in the suspension medium, and (iii) depressurizing the suspension obtained in step (ii) and cooling the depressurized suspension with a liquid aqueous coolant, in order to obtain the expanded foam beads. The blowing agent can be added in step I, or in step ii during the heating phase or following the heating phase. Following the heating phase, the suspension is maintained at a temperature in the range from IMT minus 5° C. to IMT plus 2° C. for 3 to 100 minutes, and the ratio of aqueous coolant to suspension medium is at least 0.3. The invention further relates to expanded foam beads obtained by the process and to moldings that are produced from the expanded foam beads.
First claim
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1 . A process for producing expanded foam beads from pellets comprising at least one biodegradable polyester consisting essentially of: A1) 40 to 60 mol %, based on components A1) to A2), of a succinic acid, adipic acid, or sebacic acid or a mixture thereof, A2) 40 to 60 mol %, based on components A1) to A2), of a terephthalic acid, B) 98.5 to 100 mol %, based on components A1) to A2), of 1,4-butanediol or 1,3-propanediol or a mixture thereof; and C) 0.05% to 1.5% by weight, based on comp…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08J9/18Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US2016244584A1 cover?
- A process for producing expanded foam beads from pellets comprising at least one biodegradable polyester. The process comprises (i) producing a suspension comprising pellets in an aqueous suspension medium, (ii) impregnating the pellets present in the suspension from step (i) with at least one physical blowing agent by heating the pellet suspension to a depressurization temperature I…
- Who is the assignee on this patent?
- Basf Se
- What technology area does this patent fall under?
- Primary CPC classification C08J9/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 25 2016 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).