NO890212L - DEGRADABLE PLASTIC MATERIAL. - Google Patents
DEGRADABLE PLASTIC MATERIAL.Info
- Publication number
- NO890212L NO890212L NO89890212A NO890212A NO890212L NO 890212 L NO890212 L NO 890212L NO 89890212 A NO89890212 A NO 89890212A NO 890212 A NO890212 A NO 890212A NO 890212 L NO890212 L NO 890212L
- Authority
- NO
- Norway
- Prior art keywords
- natural
- polymer
- polymer blend
- blend
- induction period
- Prior art date
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
En nedbrytbar polymerblanding som omfatter en blanding av en vanlig stabil kjemisk mettet polymer, såsom poly- etylen, en mindre stabil kjemisk umettet polymer eller kopolymer, såsom styren/butadien blokk-kopolymer, eller naturgummi, en anti-oksidant som er aktiv i et begrenset tidsrom, og en latent pro-oksidant såsom et organisk salt av et overgangsmetall, f.eks. kobolt-naftenat. Nærværet av både anti-oksidant og pro-oksidant medfarer et induksjonstidsrom før det inntreffer et brått fall i den fysiske styrke, idet induksjonstidsrommet kan betraktes som polymerblandingens effektive levetid. Polymerblandingen omfatter også fortrinnsvis et partikkelformig fyllraateriale i form av et direkte biologisk ømfintlig materiale såsom naturstivelse, et derivat av naturstivelse, et naturprotein eller et natur-cellu- loseprodukt eller et sukker i pulverform med et smeltepunkt som er høyere enn vertsblandingens fremstillingstemperatur. I nærvær av fyll-partiklene akselereres den biologiske nedbrytning av de molekylære fragmenter som dannes ved starten av den oksidative nedbrytning i de naturlige omgivelser eller i det spesielle miljø, som oppstår under kompostering av husholdningsavfall.A degradable polymer blend comprising a blend of a common stable chemically saturated polymer such as polyethylene, a less stable chemically unsaturated polymer or copolymer such as styrene / butadiene block copolymer, or natural rubber, an antioxidant active in a limited a latent prooxidant such as an organic salt of a transition metal, e.g. cobalt naphthenate. The presence of both antioxidant and pro-oxidant entails an induction period before a sudden decrease in physical strength occurs, the induction period being considered as the effective life of the polymer blend. Preferably, the polymer blend also comprises a particulate filler material in the form of a direct biologically sensitive material such as natural starch, a natural starch derivative, a natural protein or a natural cellulose product or a powdered sugar having a melting point higher than the preparation temperature of the host mixture. In the presence of the filler particles, the biodegradation of the molecular fragments formed at the onset of oxidative degradation in the natural environment or in the special environment that occurs during composting of household waste is accelerated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB878712009A GB8712009D0 (en) | 1987-05-21 | 1987-05-21 | Degradable plastics |
| PCT/GB1988/000386 WO1988009354A1 (en) | 1987-05-21 | 1988-05-16 | Degradable plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO890212D0 NO890212D0 (en) | 1989-01-18 |
| NO890212L true NO890212L (en) | 1989-01-18 |
Family
ID=26292267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO89890212A NO890212L (en) | 1987-05-21 | 1989-01-18 | DEGRADABLE PLASTIC MATERIAL. |
Country Status (2)
| Country | Link |
|---|---|
| DK (1) | DK173143B1 (en) |
| NO (1) | NO890212L (en) |
-
1989
- 1989-01-18 NO NO89890212A patent/NO890212L/en unknown
- 1989-11-20 DK DK198905823A patent/DK173143B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK582389A (en) | 1989-11-20 |
| DK173143B1 (en) | 2000-02-07 |
| NO890212D0 (en) | 1989-01-18 |
| DK582389D0 (en) | 1989-11-20 |
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