US4883706A
Expired / Lapsed
US
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Thick composite polyester films
Assignee: Rhone Poulenc Films SA
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Filing: 1987-12-23
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Granted: 1989-11-28
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Expires: 2007-12-23
Abstract
Abstract Thick, composite polyester films, well adapted as base films, e.g., for the graphic arts, are comprised of a crystalline or semicrystalline polyester film substrate (A) having a thickness of at least 40 micrometers, said film substrate (A) having a coating, e.g., a coextrudate, of a sulfonated copolyester adhesion primer on at least one of the face surfaces thereof, and said sulfonated copolyester comprising at least 80 mol % of terephthalate recurring units and from 3 to 10 mol % of oxysulfonylate recurring units.
Inventors
- 👤 Pierre Grosjean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:13
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; B; B29; B29C; B29C48/00; B29C48/16; B29C48/18; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/36; B32B37/00; B32B37/06; B32B37/08; B32B37/14; B32B37/15; B32B37/153; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; G03C1/91; G03C1/93; B32B2367/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
69 words
A coextruded composite polyester film having a thickness greater than 40 micrometers, comprising a thick crystalline or semicrystalline polyester film substrate (A), said film substrate (A) having a coating (B) of a sulfonated copolyester adhesion primer on at least one of the face surfaces thereof, said sulfonated copolyester comprising at least 80 mol % of terephthalate recurring units and from 3 to 10 mol % of oxysulfonylated recurring units.
Claim 2
Dependent Claim
69 words
A coextruded composite polyester film having a thickness greater than 40 micrometers, comprising a thick crystalline or semicrystalline polyester film substrate (A), said film substrate (A) having a coating (B) of a sulfonated copolyester adhesion primer on at least one of the face surfaces thereof, said sulfonated copolyester comprising at least 80 mol % of terephthalate recurring units and from 3 to 10 mol % of oxysulfonylated recurring units.
Claim 3
Dependent Claim
21 words
The composite polyester film as defined by claim 1, said coating(s) (B) having a thickness ranging from 0.3 to 10 micrometers.
Claim 4
Dependent Claim
61 words
The composite polyester film as defined by claim 1, wherein the sulfonated copolyester comprising said coating (B) has a plurality of recurring oxysulfonyl groups of the general formula: (-SO.sub.3).sub.n M (I) in which n is equal to 1 or 2; and M is a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium cation or a quaternary ammonium cation.
Claim 5
Dependent Claim
22 words
The composite polyester film as defined by claim 1, the film substrate (A) having a coating (B) on each face surface thereof.
Claim 6
Dependent Claim
27 words
The composite polyester film as defined by claim 1, at least one of the film substrate (A) and coating(s) (B) comprising an effective amount of filler particles.
Claim 7
Dependent Claim
35 words
The composite polyester film as defined by claim 1, wherein the polyester comprising said substrate (A) is a homopolyester or a copolyester of terephthalic acid containing at least 80 mol % of recurring terephthalate units.
Claim 8
Dependent Claim
20 words
The composite polyester film as defined by claim 6, wherein the polyester comprising said substrate (A) is ethylene glycol polyterephthalate.
Claim 9
Dependent Claim
83 words
The composite polyester film as defined by claim 1, wherein the sulfonated copolyester comprising said coating (B) has a plurality of aromatic diacid recurring units of the formula: ##STR2## in which n is equal to 1 or 2; M is a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium cation or a quaternary ammonium cation; Z is a polyvalent aromatic radical; X and Y are hydroxycarbonyl radicals or derivatives thereof; and p is an integer equal to 1 or 2.
Claim 10
Dependent Claim
24 words
The composite polyester film as defined by claim 8, wherein the sulfonated copolyester comprises a plurality of recurring units derived from a hydroxysulfonylisophthalic acid.
Claim 11
Dependent Claim
23 words
The composite polyester film as defined by claim 8, wherein the sulfonated copolyester comprises a plurality of recurring units derived from isophthalic acid.
Claim 12
Dependent Claim
34 words
The composite polyester film as defined by claim 10, wherein the sulfonated copolyester, the number of recurring units derived from isophthalic acid constitutes up to 20% of the total number of terephthalate/isophthalate recurring units.
Claim 13
Dependent Claim
34 words
The composite polyester film as defined by claim 8, wherein the sulfonated copolyester comprises a plurality of recurring units derived from ethylene glycol and/or the oligomers thereof having a molecular weight less than 600.
Claim 14
Dependent Claim
31 words
The composite polyester film as defined by claim 12, wherein the content by weight of recurring units derived from ethylene glycol oligomers in the sulfonated copolyester ranges from 2 to 30%.
Claim 15
Dependent Claim
23 words
The composite polyester film as defined by claim 1, further comprising a final application coating on the at least one primer coating (B).
Claim 16
Dependent Claim
17 words
The composite polyester film as defined by claim 14, said final application coating comprising a matte layer.
Claim 17
Dependent Claim
17 words
The composite polyester film as defined by claim 14, said final application coating comprising a diazo 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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |