Patent US4801508A successfully refreshed from Google Patents.
US4801508A
Expired / Lapsed
US
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Drafting material
Assignee: Hoechst AG
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Filing: 1987-06-23
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Granted: 1989-01-31
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Expires: 2007-06-23
Abstract
Abstract The invention discloses a drafting material which comprises a plastic support having, on at least one surface, an adhesive layer, a layer of a pigmented or clear lacquer and an antistatic top layer, in which the layer of pigmented or clear lacquer contains a combination of (a) a linear aromatic polyester, (b) a carboxylated acrylate resin, (c) a cyclic acid amide, corresponding to the general formula I ##STR1## wherein R stands for an alkyl group having 1 to 4 carbon atoms, and (d) an acid catalyst. In the drafting material of the invention hardness, and resistance to solvents are improved.
Inventors
- 👤 Walter Lutz
- 👤 Roman Keiper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:23
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/04; B05D7/00; B05D7/02; B05D7/04; B44; B44D; B44D3/00; B44D3/18; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34922; C09; C09D; C09D133/00; C09D133/04; C08L; C08L61/00; C08L61/20; C08L61/32; C08L67/00; C08L67/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A drafting material which comprises a plastic support having, on at least one surface, an adhesive layer, a layer of lacquer and an antistatic top layer, wherein the layer of lacquer contains a combination of: (a) a linear aromatic polyester, (b) a carboxylated acrylate resin, (c) a cyclic acid amide, corresponding to the general formula I ##STR3## wherein R stands for an alkyl group having 1 to 4 carbon atoms, and (d) an acid catalyst.
Claim 2
Dependent Claim
75 words
A drafting material which comprises a plastic support having, on at least one surface, an adhesive layer, a layer of lacquer and an antistatic top layer, wherein the layer of lacquer contains a combination of: (a) a linear aromatic polyester, (b) a carboxylated acrylate resin, (c) a cyclic acid amide, corresponding to the general formula I ##STR3## wherein R stands for an alkyl group having 1 to 4 carbon atoms, and (d) an acid catalyst.
Claim 3
Dependent Claim
16 words
A material as claimed in claim 1, wherein the layer of lacquer contains an inorganic pigment.
Claim 4
Dependent Claim
26 words
A material as claimed in claim 1, wherein the aromatic polyester used comprises a copolyester of isophthalic acid and terephthalic acid and at least one glycol.
Claim 5
Dependent Claim
35 words
A material as claimed in claim 1, wherein the carboxylated acrylate resin used comprises a resin having a viscosity ranging from about 700 to 750 mPa.s and an acid number between about 50 and 100.
Claim 6
Dependent Claim
15 words
A material as claimed in claim 1, wherein the cyclic acid amide used comprises hexamethoxymethylmelamine.
Claim 7
Dependent Claim
16 words
A material as claimed in claim 1, wherein the acid catalyst used comprises p-toluene sulfonic acid.
Claim 8
Dependent Claim
29 words
A material as claimed in claim 1, wherein the weight ratio between the carboxylated acrylate resin and the aromatic polyester is in the range from about 15:1 to 10:1.
Claim 9
Dependent Claim
15 words
A drafting material as claimed in claim 1, which is provided with a light-sensitive layer.
Claim 10
Dependent Claim
30 words
A drafting material as claimed in claim 3, wherein the weight ratio between the carboxylated acrylate resin and the aromatic polyester is in the range between about 15:1 to 10:1.
Claim 11
Dependent Claim
30 words
A drafting material as claimed in claim 4, wherein the weight ratio between the carboxylated acrylate resin and the aromatic polyester is in the range between about 15:1 to 10:1.
Claim 12
Dependent Claim
53 words
A drafting material as claimed in claim 1 comprising: (a) a copolyester of isophthalic acid and terephtalic acid and at least one glycol, (b) a carboxylated acrylate resin having a viscosity from about 700 and 750 mPa.s and an acid number from about 50 and 100, (c) hexamethoxymethylmelamine, and (d) p-toluene sulfonic acid.
Claim 13
Dependent Claim
30 words
A drafting material as claimed in claim 11, wherein the weight ratio between the carboxylated acrylate resin and the aromatic polyester is in the range from about 15:1 to 10:1.
Claim 14
Dependent Claim
16 words
A drafting material as claimed in claim 12, which is provided with a light sensitive layer.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |