US4500598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting film
Assignee: Hoechst AG
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Filing: 1983-02-18
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Granted: 1985-02-19
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Expires: 2003-02-18
Abstract
Abstract Disclosed is a drafting film which comprises a plastic base provided on at least one surface with an adhesive layer and a pigmented coating system which comprises a pigmented layer and a top layer or a pigmented layer alone. In particular, the pigmented coating system comprises an acrylate or methacrylate copolymer comprising at least 50 percent by weight of an ester monomer, the alcohol component of which has a chain length of at least four carbon atoms, an antistatic agent comprising a polymeric sulfonic acid salt in combination with homopolymers or copolymers of vinyl acetate, or partially hydrolyzed polyvinyl acetate, cross-linking agents and delusterants. Also disclosed is the use of the drafting film for producing diazo sensitized film.
Inventors
- 👤 Klaus Thoese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/26; Y10T428/27; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31667; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31935
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
131 words
A drafting film, comprising a plastic base; an adhesive layer applied to a least one side of said plastic base; and a pigmented coating system including a top layer and a pigmented layer applied to said adhesive layer, said top layer comprising: a first component selected from the group consisting of a homopolymer or copolymer of vinyl acetate; a second component selected from the group consisting of an acrylate or methacrylate copolymer comprising at least about 50% by weight of an ester monomer having at least four carbon atoms in the alcohol component thereof; and an antistatic agent comprising a salt of a polymeric sulfonic acid, and said pigmented layer comprising: a delusterant, and a pigmented material, whereby said drafting film can be written on with pencil and with aqueous ink.
Claim 2
Dependent Claim
131 words
A drafting film, comprising a plastic base; an adhesive layer applied to a least one side of said plastic base; and a pigmented coating system including a top layer and a pigmented layer applied to said adhesive layer, said top layer comprising: a first component selected from the group consisting of a homopolymer or copolymer of vinyl acetate; a second component selected from the group consisting of an acrylate or methacrylate copolymer comprising at least about 50% by weight of an ester monomer having at least four carbon atoms in the alcohol component thereof; and an antistatic agent comprising a salt of a polymeric sulfonic acid, and said pigmented layer comprising: a delusterant, and a pigmented material, whereby said drafting film can be written on with pencil and with aqueous ink.
Claim 3
Dependent Claim
23 words
A drafting film as defined in claim 1, wherein said second component comprises at least about 75% by weight of said ester monomer.
Claim 4
Dependent Claim
51 words
A drafting film as defined in claim 1, wherein said first component comprises a copolymer comprising at least about 90% by weight of vinyl acetate and up to about 10% by weight of unsaturated carboxylic acid, and said second component comprises at least about 75% by weight of said ester monomer.
Claim 5
Dependent Claim
30 words
A drafting film as defined in claim 3, wherein said unsaturated carboxylic acid is selected from the group comprising maleic acid, maleic anhydride, citraconic acid, itaconic acid or crotonic acid.
Claim 6
Dependent Claim
15 words
A drafting film as defined in claim 1, wherein said plastic base comprises a polyester.
Claim 7
Dependent Claim
14 words
A drafting film as defined in claim 5, wherein said polymer comprises polyethylene terephthalate.
Claim 8
Dependent Claim
20 words
A drafting film as defined in claim 1, wherein said alcohol component of said ester monomer comprises four carbon atoms.
Claim 9
Dependent Claim
20 words
A drafting film as defined in claim 1, wherein said alcohol component of said ester monomer comprises eight carbon atoms.
Claim 10
Dependent Claim
15 words
A drafting film as defined in claim 1, wherein said second component comprises 2-ethylhexyl acrylate.
Claim 11
Dependent Claim
29 words
A drafting film as defined in claim 1, wherein said copolymer of said second component has a glass transition point in the range of from about -70° C.-0° C.
Claim 12
Dependent Claim
42 words
A drafting film as defined in claim 1, wherein the mixing ratio between said first and second components ranges from about 70 to 90% by weight of said first component and from about 10 to 30% by weight of said second component.
Claim 13
Dependent Claim
15 words
A drafting film defined in claim 1, wherein the coating system comprises a cross-linking compound.
Claim 14
Dependent Claim
21 words
A drafting film as defined in claim 1, wherein said antistatic agent comprises a sodium salt of a polymeric sulfonic acid.
Claim 15
Dependent Claim
25 words
A drafting film as defined in claim 1, wherein the thickness of said top layer ranges from about 0.1 to about 0.3 g/m 2 .
Claim 16
Dependent Claim
25 words
A diazo sensitized film comprising the drafting film as defined in claim 1 having a layer comprising light-sensitive diazo chemicals applied to one face thereof.
Claim 17
Dependent Claim
36 words
A drafting film as defined in claim 1, wherein said first component comprises a copolymer comprising at least about 90% by weight of vinyl acetate and up to about 10% by weight of unsaturated carboxylic acid.
Claim 18
Dependent Claim
25 words
A drafting film as defined in claim 16, wherein said first component comprises a copolymer comprising at least about 95% by weight of vinyl acetate.
References Cited (Backward Citations)
US948006A
Cited
GB1061784A
Cited
US3396046A
Cited
GB1059073A
Cited
US3515626A
Cited
GB1127076A
Cited
GB1231407A
Cited
US3607374A
Cited
US3839253A
Cited
US3857729A
Cited
US3870549A
Cited
GB1448889A
Cited
GB1497657A
Cited
UST948006I4
Cited
GB1500134A
Cited
US4242396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |