US4347272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible composition of cork and sheet structures made therefrom
Assignee: Individual
•
Filing: 1980-11-24
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Granted: 1982-08-31
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Expires: 2000-11-24
Abstract
Abstract A flexible composition comprises an intimate mixture of cork granules with a liquid organic polyol plasticizer for the cork in the granules, with the cork granules being dispersed and bonded together with a flexible, plasticized polyvinyl chloride resin.
Inventors
- 👤 Donald H. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:48
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/18; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L97/00; C08L97/007; D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0039; D06N7/0052; D06N7/0055; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1424; Y10T428/25; Y10T428/253; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/3167
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
66 words
A flexible composition which comprises 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of flexible plasticized polyvinyl chloride resin, the flexible composition being in the form of a flexible sheet.
Claim 2
Dependent Claim
66 words
A flexible composition which comprises 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of flexible plasticized polyvinyl chloride resin, the flexible composition being in the form of a flexible sheet.
Claim 3
Dependent Claim
13 words
The composition of claim 1 which is no more than 1/4 inch thick.
Claim 4
Dependent Claim
33 words
The composition of claim 1 in which said liquid organic polyol is incompatible in terms of miscibility with said matrix, to suppress migration of the polyol from the cork granules to the matrix.
Claim 5
Dependent Claim
20 words
The composition of claim 1 in which said cork granules are predominately of a size between 1/8 and 1/18 inch.
Claim 6
Dependent Claim
18 words
The composition of claim 1 in which said polyvinyl chloride resin is plasticized with a phthalate diester material.
Claim 7
Dependent Claim
12 words
The composition of claim 1 in which said polyol plasticizer is glycerine.
Claim 8
Dependent Claim
99 words
A flexible composition which comprises an intimate mixture of 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of glycerine plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of flexible, plasticized polyvinyl chloride resin, said liquid organic polyol being incompatible in terms of miscibility with said matrix to suppress migration of the polyol from the cork granules to the matrix, the flexible composition being in the form of a flexible sheet no more than 1/4 inch thick.
Claim 9
Dependent Claim
99 words
A flexible composition which comprises an intimate mixture of 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of glycerine plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of flexible, plasticized polyvinyl chloride resin, said liquid organic polyol being incompatible in terms of miscibility with said matrix to suppress migration of the polyol from the cork granules to the matrix, the flexible composition being in the form of a flexible sheet no more than 1/4 inch thick.
Claim 10
Dependent Claim
18 words
The composition of claim 7 in which said polyvinyl chloride resin is plasticized with a phthalate diester material.
Claim 11
Dependent Claim
102 words
A flexible sheet which comprises an intimate mixture of 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of a flexible, plasticized polyvinyl chloride resin, said flexible sheet being no more than 1/4 inch and carrying on one side thereof a second layer of contact adhesive and a third, peel-sheet layer overlying the contact adhesive layer for peeling away to expose the contact adhesive layer for use.
Claim 12
Dependent Claim
102 words
A flexible sheet which comprises an intimate mixture of 20 parts by weight of cork granules, said granules containing from 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said cork granules being dispersed and bonded together in a matrix of 4 to 60 parts by weight of a flexible, plasticized polyvinyl chloride resin, said flexible sheet being no more than 1/4 inch and carrying on one side thereof a second layer of contact adhesive and a third, peel-sheet layer overlying the contact adhesive layer for peeling away to expose the contact adhesive layer for use.
Claim 13
Dependent Claim
34 words
The flexible sheet of claim 9 in which said liquid organic polyol is incompatible in terms of miscibility with said matrix, to suppress migration of the polyol from the cork granules to the matrix.
Claim 14
Dependent Claim
18 words
The composition of claim 9 in which said polyvinyl chloride resin is plasticized with a phthalate diester material.
Claim 15
Dependent Claim
13 words
The flexible sheet of claim 9 in which said polyol plasticizer is glycerine.
Claim 16
Dependent Claim
21 words
The flexible sheet of claim 12 in which said cork granules are predominately of a size between 1/8 and 1/18 inch.
Claim 17
Independent Claim
165 words
The method of manufacturing flexible sheets of cork granules and binder which comprises mixing 4 to 60 parts by weight of plastic matrix-forming resin with 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said resin being incompatible with said polyol plasticizer; adding to said mixture essentially 20 parts by weight of cork granules; pressing said mixture in a chamber by means of a tightly-fitting plunger pressed into the mouth of said chamber to compress the mixture to a pressure of about 20 to 30 pounds per cubic foot, while heating said mixture to about 250° to 400° F. for a period of time sufficient to cause the liquid organic polyol to be substantially all absorbed into the cork, and for the resin to form the mixture into a unitary mass, and thereafter cooling said composition to solid form, releasing the compression on said composition, removing the resulting block of said composition, and cutting said composition into flexible sheets.
Claim 18
Independent Claim
165 words
The method of manufacturing flexible sheets of cork granules and binder which comprises mixing 4 to 60 parts by weight of plastic matrix-forming resin with 1 to 10 parts by weight of a liquid organic polyol plasticizer for the cork, said resin being incompatible with said polyol plasticizer; adding to said mixture essentially 20 parts by weight of cork granules; pressing said mixture in a chamber by means of a tightly-fitting plunger pressed into the mouth of said chamber to compress the mixture to a pressure of about 20 to 30 pounds per cubic foot, while heating said mixture to about 250° to 400° F. for a period of time sufficient to cause the liquid organic polyol to be substantially all absorbed into the cork, and for the resin to form the mixture into a unitary mass, and thereafter cooling said composition to solid form, releasing the compression on said composition, removing the resulting block of said composition, and cutting said composition into flexible sheets.
Claim 19
Dependent Claim
15 words
The method of claim 14 in which said plastic matrix-forming resin is plasticized polyvinyl chloride.
Claim 20
Dependent Claim
12 words
The method of claim 15 in which said polyol plasticizer is glycerine.
Claim 21
Dependent Claim
23 words
The method of claim 16 in which the polyvinyl chloride resin and plasticizer is previously plasticized prior to the mixing and heating step.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |