US4448936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resin composition
Assignee: Individual
•
Filing: 1982-04-08
•
Granted: 1984-05-15
•
Expires: 2002-04-08
Abstract
Abstract A polyurethane resin composition having better heat resistance comprises one polyurethane resin; and polyethylene terephthalate resin and/or a polyamide resin, such as nylon 6 resin or nylon 66 resin, in an amount of 8 to 30 parts by weight per 100 parts by weight of the polyurethane resin. The polyurethane resin composition is made by mixing polyethylene terephthalate resin solution with O-chlorophenol as solvent, and/or nylon 6 or nylon 66 resin solution with formic or acetic acid as solvent, with the polyurethane resin solution; and then drying in oven to eliminate the solvent for making the skin of leather-like coated fabrics which is capable of heat transfer printing.
Inventors
- 👤 Huei-Hsiung Wang
- 👤 Chyuan-chyuan Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
38 words
A polyurethane resin composition capable of heat transfer printing comprising: (a) one polyurethane resin; and (b) nylon 6 resin in an amount of 10 to 30 parts by weight per 100 parts by weight of said polyurethane resin.
Claim 2
Dependent Claim
38 words
A polyurethane resin composition capable of heat transfer printing comprising: (a) one polyurethane resin; and (b) nylon 6 resin in an amount of 10 to 30 parts by weight per 100 parts by weight of said polyurethane resin.
Claim 3
Dependent Claim
80 words
A process for manufacturing a polyurethane resin composition capable of heat transfer printing comprising the steps of: (a) preparing a solution blend of the polyurethane resin composition by mixing a polyurethane solution and nylon 6 resin solution, the nylon 6 resin solution being in an amount between 10 to 30 parts by weight per 100 parts by weight of the polyurethane solution; and (b) drying the solution mixed according to step (a) to eliminate solvents from the polyurethane resin composition.
Claim 4
Dependent Claim
80 words
A process for manufacturing a polyurethane resin composition capable of heat transfer printing comprising the steps of: (a) preparing a solution blend of the polyurethane resin composition by mixing a polyurethane solution and nylon 6 resin solution, the nylon 6 resin solution being in an amount between 10 to 30 parts by weight per 100 parts by weight of the polyurethane solution; and (b) drying the solution mixed according to step (a) to eliminate solvents from the polyurethane resin composition.
Claim 5
Dependent Claim
83 words
A process as in claim 2 wherein step (b) is practiced by dissolving a nylon 6 resin in a solvent selected from the group consisting of formic acid, acetic acid, m-cresol, chlorophenol, trichloroacetic acid, ethylene carbonte, sulfuric acid, phosphoric acid, hexamethylphosphoric acid, dimethyl sulfoxide, trifluoroethanol, chloral hydrate, halogenated acetic acid, hydrogen fluoride, hydrogen chloride/methanol, liquid sulfur dioxide, methanol solution of calcium chloride, methanol solution of magnesium chloride, benzyl alcohol, ethylene chlorohydrin, 1,3-chloro-propanol, 2-butene-1,4,-ethylene glycol, diethylene glycol, N-acetyl morpholin, formamide, chloroform, and trifluoroacetic acid.
Claim 6
Dependent Claim
33 words
A process as in claim 2 or 3 in which step (a) is practiced by dissolving the polyurethane resin in a solvent selected from the group consisting of dimethyl formamide, benzene and toluene.
Claim 7
Dependent Claim
26 words
A process as in claim 2 or 3 in which the viscosity of the solution blend is controlled in a range from 5000 to 12000 cps.
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |