US4282120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet material for general coverings and method of making the same
Assignee: Sub Utilizzazione Brevetti Srl Soc
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Filing: 1978-01-25
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Granted: 1981-08-04
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Expires: 1998-01-25
Abstract
Abstract Method of producing a stratiform material, wherein 35-45 parts by weight of solvents for polyvinylacetate (PVA) homopolymer in the form of flakes or pearls are stirred with 10-15 parts of PVA and 2-5 parts by weight of oil, while separately mixing 25-30% by weight of wood powder having a granulometry in the range of 50-150 microns and mineral fillers in an amount of 10-20% by weight, then intermixing the liquid and powdery phases to obtain a homogeneous mixture which is passed through calendering rollers, the last pair of which produces an embossing on at least one of the two surfaces, the layer being reduced to a thickness in the range of 0.2-2.0 millimeters.
Inventors
- 👤 Leandro Cisterni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:56
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/01; C08L29/00; C08L29/02; C08L29/04; C08L31/00; C08L31/02; C08L31/04; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A method of producing a stratiform material comprising stirring 35-45 parts by weight of solvents, polyvinylacetate homopolymer in the form of flakes or pearls with 10-15 parts of polyvinylacetate and 2-5 parts by weight of oil, separately mixing 25-30% by weight of wood powder having a granulometry in the range of 50-150 microns and mineral fillers in an amount of 10-20% by weight, then intermixing the liquid and powdery phases to obtain a homogeneous mixture which is passed through calendering rollers, the last pair of which produces an embossing on at least one of the two surfaces, the layer being reduced to a thickness in the range of 0.2-2.0 millimeters.
Claim 2
Independent Claim
110 words
A method of producing a stratiform material comprising stirring 35-45 parts by weight of solvents, polyvinylacetate homopolymer in the form of flakes or pearls with 10-15 parts of polyvinylacetate and 2-5 parts by weight of oil, separately mixing 25-30% by weight of wood powder having a granulometry in the range of 50-150 microns and mineral fillers in an amount of 10-20% by weight, then intermixing the liquid and powdery phases to obtain a homogeneous mixture which is passed through calendering rollers, the last pair of which produces an embossing on at least one of the two surfaces, the layer being reduced to a thickness in the range of 0.2-2.0 millimeters.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein from the calendering outlet the product is introduced into an oven.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein the products obtained are then stamped differentiating the wood veneerings by means of different colouring.
Claim 5
Dependent Claim
29 words
A method according to claim 1, wherein the percentages of the various ingredients are as follows: Solvents: 39.7% Oil: 4.0% Polyvinylacetate homopolymer: 13.2% Wood powder: 26.5% Mineral fillers: 16.6%
Claim 6
Dependent Claim
21 words
A method according to claim 4, wherein the solvents are a mixture of acetone and toluene of 26.5% and 13.2%, respectively.
Claim 7
Dependent Claim
28 words
A method according to claim 4, wherein the fillers are a mixture of inert materials in a percentage of 10.6%, and thixotropic agents in a percentage of 6.0%.
Claim 8
Dependent Claim
32 words
A process according to claim 1, wherein the percentages of the ingredients are as follows: Ash wood powder: 30.0% polyvinylacetate: 10.0% Acetone: 22.5% Toluene: 14.5% Hyperventilated magnesium silicate: 19.3% Silicone oil: 3.7%
Claim 9
Dependent Claim
18 words
A method of claim 6 wherein the inert material is calcium carbonate and the thioxtropic agents are Kaolinites.
Claim 10
Dependent Claim
10 words
A sheet material produced by the process of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |