Biodegradable sheet
AssigneeTipa Corp. Ltd.
InventorsTal Neuman, Daphna Nissenbaum, Shai Garty, Dori Pelled, Nili Konieczny
Life of this patent
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Abstract
Disclosed is a biodegradable sheet comprising at least one layer which comprises a biodegradable polymer and surface treated nanoclay particles or at least one layer which comprises PVOH grafted with a crosslinker and PBS or PBSA or a combination a biodegradable polymer and surface treated nanoclay particles and at least one layer which comprises PVOH grafted with a crosslinker and PBS or PBSA.
Claims43
A multilayered biodegradable sheet, wherein at least one layer comprises at least one biodegradable polymer and surface treated nanoclay particles.
A multilayered biodegradable sheet, wherein at least one layer comprises at least one biodegradable polymer and surface treated nanoclay particles, wherein the surface treated nanoclay particles are homogeneously dispersed in the at least one layer comprises at least one biodegradable polymer and surface treated nanoclay particles.
A multilayered biodegradable sheet, wherein at least one layer comprises PVOH grafted and PBS or PBSA with a crosslinker.
A single layered biodegradable sheet comprising at least one biodegradable polymer and surface treated nanoclay particles.
A single layered biodegradable sheet comprising PVOH grafted with a crosslinker and PBS or PBSA.
A method of preparing a PVOH grafted and PBS or PBSA with a crosslinker comprising the step of blending dried PBS or PBSA and PVOH with the crosslinker and a radical initiator.
A method of preparing surface treated nanoclay particles, the method comprising
- reacting nanoclay particles with a functional moiety comprising at least two functional sites, leaving at least one free functional site for further reaction;
- and
- reacting said at least one free functional site with a biodegradable polymer.
A method of preparing surface treated nanoclay particles, the method comprising
- reacting nanoclay particles with a plurality of functional moieties, each comprising at least two functional sites, such that at least one functional site ties at least one functional moiety to said nanoclay particle and at least a second functional site on the same functional moiety ties to an additional functional moiety, which is attached to any remaining functional moieties, leaving at least one free functional site;
- and
- reacting said free functional site with a biodegradable polymer.
A method of preparing surface treated nanoclay particles, the method comprising;
- mixing the nanoclay particles in a solution of at least one ring-bearing monomer;
- and
- initiating a ring opening polymerization reaction between the nanoclay particles and the monomers, such that polymeric brushes are formed on the surface of the nanoclay particles.
The multilayered biodegradable sheet according to any one of the previous claims, wherein the crosslinker is selected from the group consisting of 1,4-Butanediol dimethacrylate, hexamethylene dimethacrylate, maleic anhydride, polyethylene glycol-dimethacrylate, and polycaprolactone dimethacrylate and any combination thereof.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% w/w PVOH, grafted with PBSA or PBS;
- Layer 3:
- consisting of about 98-85% PBSA and about 2-15% w/w and surface treated nanoclay particles;
- Layer 4:
- consisting of about 100% w/w PVOH grafted with PBSA or PBS;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% w/w PVOH w/ or w/o crosslinker;
- Layer 3:
- consisting of about 98-85% PBSA and about 2-15% w/w and surface treated nanoclay particles;
- Layer 4:
- consisting of about 100% w/w PVOH w/ or w/o crosslinker;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% w/w PVOH, grafted with PBSA or PBS;
- Layer 3:
- consisting of about 98-85% PBSA and about 2-15% w/w and surface treated nanoclay particles;
- Layer 4:
- consisting of about 100% w/w PVOH grafted with PBSA or PBS;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% grafted PBSA or PBS;
- Layer 3:
- consisting of about 100% PVOH w/ or w/o a crosslinker;
- Layer 4:
- consisting of about 100% grafted PBSA or PBS;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% grafted PVOH with PBSA or PBS;
- Layer 3:
- consisting of about 100% PVOH w/or w/o a crosslinker;
- Layer 4:
- consisting of about 100% grafted PVOH with PBSA or PBS;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA;
- Layer 2:
- consisting of about 100% grafted PVOH with PBS;
- Layer 3:
- consisting of about 100% PVOH w/or w/o a crosslinker;
- Layer 4:
- consisting of about 100% grafted PVOH with PBS;
- Layer 5:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% w/w PVOH, grafted with PBSA or PBS;
- Layer 3:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 100% w/w PVOH w/ or w/o crosslinker;
- Layer 3:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
A multilayered biodegradable sheet comprising:
- Layer 1:
- consisting about 25% w/w PLA and about 75% w/w PBSA or PBS;
- Layer 2:
- consisting of about 98-85% PBSA and about 2-15% w/w and surface treated nanoclay particles;
- Layer 3:
- consisting of about w/ or w/o 25% w/w PLA and about 75% or 100% w/w PBSA or PBS or PBAT.
Dependencies are inferred from the claim text.