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US4504642A
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Acrylic type self-adhesive
Assignee: Daikin Industries Ltd
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Filing: 1982-09-09
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Granted: 1985-03-12
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Expires: 2002-09-09
Abstract
Abstract An acrylic type self-adhesive which comprises a polymer comprising (a) units of at least one compound of the formula: <IMAGE> wherein R1 is a hydrogen atom or a methyl, ethyl or propyl group, 1 is an integer of 1 to 5, s is 0 or 1, and Rf is -(CF2)mX or -(CF2)pO(CF2)nF (wherein m is an integer of 1 to 10, X is a hydrogen or fluorine atom or a hexafluoroisopropyl group, n is an integer of 1 to 5 and p is an integer of 1 to 3), and optionally units of (b) at least one compound of the formula: <IMAGE> wherein R2 is a hydrogen atom or a methyl, ethyl or propyl group and R3 is -OH, -NH2, -NHCH2OH, <IMAGE> -OCH2CH2OH, <IMAGE> or -OCH2CH2N(CH3)2, said polymer having an intrinsic viscosity of 0.1 to 1.0, which shows excellent oil resistance and water resistance.
Inventors
- 👤 Akira Ohmori
- 👤 Nobuyuki Tomihashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:26
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/14; C09J133/16; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
An acrylic type self-adhesive which comprises a polymer comprising units of (a) at least about 30% by mole of at least one compound of the formula: ##STR13## wherein R 1 is a hydrogen atom or a methyl, ethyl or propyl group, 1 is an integer of 1 to 5, s is 0 or 1, and Rf is --(CF 2 ) m X or --(CF 2 ) p O(CF 2 )nF (wherein m is an integer of 1 to 10, X is a hydrogen or fluorine atom or a hexafluoroisopropyl group, n is an integer of 1 to 5 and p is an integer of 1 to 3), and optionally (b) at least one compound of the formula: ##STR14## wherein R 2 is a hydrogen atom or a methyl, ethyl or propyl group and R 3 is --OH, --NH 2 , --NHCH 2 OH, ##STR15## --OCH 2 CH 2 OH, ##STR16## or --OCH 2 CH 2 N(CH 3 ) 2 , said polymer having an intrinsic viscosity of 0.1 to 1.0 measured at 35° C. in methylethylketone or hexafluoro-m-xylene, a fluorine content of at least 20% by weight, and a glass transition point of -5° C. or lower.
Claim 2
Dependent Claim
197 words
An acrylic type self-adhesive which comprises a polymer comprising units of (a) at least about 30% by mole of at least one compound of the formula: ##STR13## wherein R 1 is a hydrogen atom or a methyl, ethyl or propyl group, 1 is an integer of 1 to 5, s is 0 or 1, and Rf is --(CF 2 ) m X or --(CF 2 ) p O(CF 2 )nF (wherein m is an integer of 1 to 10, X is a hydrogen or fluorine atom or a hexafluoroisopropyl group, n is an integer of 1 to 5 and p is an integer of 1 to 3), and optionally (b) at least one compound of the formula: ##STR14## wherein R 2 is a hydrogen atom or a methyl, ethyl or propyl group and R 3 is --OH, --NH 2 , --NHCH 2 OH, ##STR15## --OCH 2 CH 2 OH, ##STR16## or --OCH 2 CH 2 N(CH 3 ) 2 , said polymer having an intrinsic viscosity of 0.1 to 1.0 measured at 35° C. in methylethylketone or hexafluoro-m-xylene, a fluorine content of at least 20% by weight, and a glass transition point of -5° C. or lower.
Claim 3
Dependent Claim
25 words
The self-adhesive according to claim 1, wherein the content of the units of the compound (a) in the polymer is at least 70% by mole.
Claim 4
Dependent Claim
19 words
The self-adhesive according to claim 1, wherein the fluorine content of the polymer is at least 45% by weight.
Claim 5
Dependent Claim
44 words
The self-adhesive according to claim 1 or claim 2, wherein the compound (a) is one selected from the group consisting of 2,2,3,3,3-pentafluoropropyl acrylate, 2,2,3,3,4,4,4-heptafluorobutyl acrylate, 2,2,3,4,4,4-hexafluorobutyl acrylate, 2,2,3,3,4,5,5,5-octafluoro-4-tri-fluoromethylpentyl acrylate, 5,5,6,6,7,7,7-heptafluoro-3-oxaheptyl acrylate, 2,2,3,3,3,5,5,5-heptafluoro-4-oxapentyl acrylate, 1,1-dihydrononafluoro-4-oxahexyl acrylate and 1,1-dihydroundecafluoro-4-oxaheptyl acrylate, and corresponding methacrylate, 2-ethylacrylate and 2-propylacrylate.
Claim 6
Dependent Claim
31 words
The self-adhesive according to claim 1, wherein the compound (b) is one selected from the group consisting of acrylic acid, acrylamide, N-methylolacrylamide, methacrylic acid, methacrylamide-2-ethylacrylic acid, 2-ethylacrylamide, 2-propylacrylic acid and 2-propylacrylamide.
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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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |