US3873478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane-protein composition and process for making same
Assignee: Centre Technique Cuir Chaussure Maroquinerie
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Filing: 1973-07-30
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Granted: 1975-03-25
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Expires: 1993-07-30
Abstract
Abstract Proteinic substances are degreased (defatted), dried and pulverized and combined with polyurethane precursors (i.e. polyols and di, tri or polyisocyanates) to form a leatherlike composition.
Inventors
- 👤 Philippe Comte
- 👤 Wilhelm Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:05
CPC Classifications
C; C08; C08L; C08L89/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08L75/00; C08L75/04; C08L89/005; C08L89/04; C08L89/06; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/25
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
A PROCESS FOR PRODUCING A POLYURETHANE COMPOSITION WHICH COMPRISES THE STEPS OF: FORMING A PROTEINIC POWDER OF A PARTICLE SIZE OF 100 TO 250 MICRONS; MIXING SAID PROTEINIC POWDER WITH A POLYURETHANE PRECURSOR SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OXIDE, POLYPROPYLENE OXIDE AND A POLYESTER FORMED BY REACTING ADIPIC ACID OR ORTHOPHTHALIC ANHYDRIDE WITH A GLYCOL OR TRIOL IN AN AMOUNT OF SUBSTANTIALLY 0.1 TO 1 PART BY WEIGHT OF SAID POWDER PER PART BY WEIGHT OF SAID PRECURSOR; AND THEREAFTER POLYMERIZING THE RESULTING MIXTURE OF THE POWDER AND PRECURSOR IN THE PRESENCE OF AN ISOCYANATE SELECTED FROM THE GROUP WHICH CONSISTS OF TOTYLENE DIISOCYANATE, DIPHENYLMETHANE DI-ISOCYANATE AND HEXAMETHYLENE DI-ISOCYANATE TO PRODUCE POLYURETHANE WITH SAID POWDER CHEMICALLY BONDED THEREIN.
Claim 2
Dependent Claim
120 words
A PROCESS FOR PRODUCING A POLYURETHANE COMPOSITION WHICH COMPRISES THE STEPS OF: FORMING A PROTEINIC POWDER OF A PARTICLE SIZE OF 100 TO 250 MICRONS; MIXING SAID PROTEINIC POWDER WITH A POLYURETHANE PRECURSOR SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OXIDE, POLYPROPYLENE OXIDE AND A POLYESTER FORMED BY REACTING ADIPIC ACID OR ORTHOPHTHALIC ANHYDRIDE WITH A GLYCOL OR TRIOL IN AN AMOUNT OF SUBSTANTIALLY 0.1 TO 1 PART BY WEIGHT OF SAID POWDER PER PART BY WEIGHT OF SAID PRECURSOR; AND THEREAFTER POLYMERIZING THE RESULTING MIXTURE OF THE POWDER AND PRECURSOR IN THE PRESENCE OF AN ISOCYANATE SELECTED FROM THE GROUP WHICH CONSISTS OF TOTYLENE DIISOCYANATE, DIPHENYLMETHANE DI-ISOCYANATE AND HEXAMETHYLENE DI-ISOCYANATE TO PRODUCE POLYURETHANE WITH SAID POWDER CHEMICALLY BONDED THEREIN.
Claim 3
Dependent Claim
47 words
The process defined in claim 1 wherein said proteinic powder is formed by degreasing animal or vegetable protein by treating same with steam or an organic solvent; drying the degreased protein to a water content of at most 3% by weight; and pulverizing the degreased dried protein.
Claim 4
Dependent Claim
35 words
The process defined in claim 2 wherein said protein is treated with an organic solvent selected from the group which consists of trichloroethylene, perchloroethylene, acetone or a chloroform-methanol mixture for the degreasing of the protein.
Claim 5
Dependent Claim
44 words
The process defined in claim 2 wherein said protein is bovine, sheep, goat or pig skin or bone; tendon or cartilage tissue, is hair or feather keratin, is casein from milk, is fish meal, is meat meal, is soya flour or is peanut flour.
Claim 6
Dependent Claim
22 words
The process defined in claim 4 wherein said prepolymer is formed with an excess of isocyanate capable of reacting with the powder.
Claim 7
Dependent Claim
19 words
The process defined in claim 4 wherein the mixing and polymerizing steps are each carried out at ambient temperature.
Claim 8
Dependent Claim
15 words
The process defined in claim 4 wherein a colorant is added to the powder-precursor mixture.
Claim 9
Dependent Claim
119 words
A polyurethane composition which comprises: a proteinic powder of a particle size of 100 to 250 microns; a polyurethane precursor selected from the group consisting of polyethylene oxide, polypropylene oxide, and a polyester formed by reacting adipic acid or orthophthalic anhydride with a glycol or triol wherein the weight ratio of said powder to said precursor is substantially from 0.1 to 1 part of said powder to 1 part of said precursor; and an isocyanate amounting to about 33% by weight of the total composition selected from the group consisting of tolylene di-isocyanate, diphenyl methane di-isocyanate, and hexamethylene di-isocyanate, which is reacted simultaneously with said powder and said precursor to yield said polyurethane with said powder chemically bonded thereto.
Claim 10
Dependent Claim
119 words
A polyurethane composition which comprises: a proteinic powder of a particle size of 100 to 250 microns; a polyurethane precursor selected from the group consisting of polyethylene oxide, polypropylene oxide, and a polyester formed by reacting adipic acid or orthophthalic anhydride with a glycol or triol wherein the weight ratio of said powder to said precursor is substantially from 0.1 to 1 part of said powder to 1 part of said precursor; and an isocyanate amounting to about 33% by weight of the total composition selected from the group consisting of tolylene di-isocyanate, diphenyl methane di-isocyanate, and hexamethylene di-isocyanate, which is reacted simultaneously with said powder and said precursor to yield said polyurethane with said powder chemically bonded thereto.
References Cited (Backward Citations)
US2808398A
Cited
US3663472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |