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US 5,502,158 AGranted
Degradable polymer composition
AssigneeEcopol, LLC
InventorsRichard G. Sinclair, Edward S. Lipinsky
Life of this patent
Estimating the term…
Abstract
Disclosed are degradable materials which include a nontoxic hydrolytically degradable polymer and nontoxic modifier, wherein the modifier is compatible with the polymer and the modifier is nonvolatile and nonfugitive. Also disclosed are processes for forming the various degradable materials, which include films, molded products, laminates, foams, powders, nonwovens, adhesives and coatings. The disclosed materials and processes are particularly useful for the production of commercial and consumer products in high volumes which are suitable for recycling after use or which are discarded into the environment in large volumes.
Claims73
A degradable film material comprising:
- a) a nontoxic hydrolytically degradable polymer comprising repeating monomer or comonomer units selected from the group consisting of:
- ##STR6## wherein X is the same or different and is O or NR' R' being the same, or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 R.sub.4 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and where n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12;
- b) a nontoxic modifier, wherein said modifier is compatible with said polymer such that the film material has a uniform appearance and said modifier is nonvolatile and nonfugitive;
- and
- c) wherein said film material has a tensile strength of less than about 20,000 psi.
3 more elements
The film material of claim wherein said modifier is biodegradable.
A plasticized polylactic acid film packaging material having a tensile strength of less than about 20,000 psi.
A process for producing a degradable film material, comprising:
- forming a composition comprising a nontoxic hydrolytically degradable polymer comprising repeating monomer or comonomer units selected from the group consisting of:
- ##STR10## wherein X is the same or different and is O or NR' with R' being the same or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and where n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12, and a nontoxic modifier, wherein said modifier is compatible with said polymer, such that the material has a uniform appearance, into a film having a tensile strength of less than about 20,000 psi under conditions such that said modifier is substantially nonvolatile.
A degradable molded material comprising:
- a) a nontoxic hydrolyrically degradable polymer, comprising repeating monomer comonomer units selected from the group consisting of:
- ##STR11## wherein X is the same or different and is O or NR' with R' being the same or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.3 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and where n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12;
- b) a nontoxic modifier, wherein said modifier is compatible with said polymer such that the material has a uniform appearance and said modifier is nonvolatile and nonfugitive;
- and
- c) wherein said material has a tensile strength of less than about 20,000 psi.
3 more elements
A degradable foam material comprising:
- a) a nontoxic hydrolytically degradable polymer comprising repeating monomer or comonomer units selected from the group consisting of:
- ##STR12## wherein X is the same or different and is O or NR' with R' being the same or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and where n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12;
- b) a nontoxic modifier, wherein said modifier is compatible with said polymer such that the material has a uniform appearance and said modifier is nonvolatile and nonfugitive.
1 more element
A degradable spun-bonded nonwoven material comprising:
- a) a nontoxic hydrolytically degradable polymer comprising repeating monomer or comonomer units selected from the group consisting of:
- ##STR13## wherein X is the same or different and is O or NR' with R' being the same or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and wherein n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12;
- b) a nontoxic modifier, wherein said modifier is compatible with said polymer such that the material has a uniform appearance and said modifier is nonvolatile and nonfugitive.
1 more element
A degradable adhesive material comprising:
- a) a nontoxic hydrolytically degradable polymer comprising repeating monomer or comonomer units selected from the group consisting of:
- ##STR14## wherein X is the same or different and is O or NR' with R' being the same or different and being H, hydrocarbyl, or substituted hydrocarbyl;
- R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be the same or different and are hydrogen, hydrocarbyl containing 1 to 24 carbon atoms, or substituted hydrocarbyl containing 1 to 24 carbon atoms, and where n.sub.1 and n.sub.2 can be the same or different and are an integer of from 1-12;
- b) a nontoxic modifier, wherein said modifier is compatible with said polymer such that the material has a uniform appearance and said modifier is nonvolatile and nonfugitive.
1 more element
Dependencies are inferred from the claim text.