US5641856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked resin
Assignee: Shell USA Inc
•
Filing: 1995-11-15
•
Granted: 1997-06-24
•
Expires: 2015-11-15
Abstract
Abstract A re-moldable cross-linked resin comprising polymer chains which are connected to one another via Diels-Alder adducts obtainable from a dienophile and a diene, the latter being a 2,5-dialkyl substituted furan.
Inventors
- 👤 Jan Hermen Hendrik Meurs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:13
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08G65/3324; C08L; C08L73/00; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
28 words
A re-moldable cross-linked resin comprising polymer chains which are connected to one another via Diels-Alder adducts obtained from a dienophile and a diene, comprising a 2,5-dialkyl substituted furan.
Claim 2
Dependent Claim
28 words
A re-moldable cross-linked resin comprising polymer chains which are connected to one another via Diels-Alder adducts obtained from a dienophile and a diene, comprising a 2,5-dialkyl substituted furan.
Claim 3
Dependent Claim
15 words
A resin as claimed in claim 1, remoldable in a temperature range of 110°-250° C.
Claim 4
Dependent Claim
49 words
A resin as claimed in claim 1, wherein the dienophile is an alkyne selected from the group consisting of alkynes having electron withdrawing groups attached to both sides of an ethyne moiety, comprising a but-2-ene-1,4-dione moiety in a 5- membered ring, and a but-2-ene-1,4-diene moiety in a 6-membered ring.
Claim 5
Dependent Claim
17 words
A resin as claimed in claim 1, wherein the dienophile is a cyclic derivative of maleic anhydride.
Claim 6
Dependent Claim
40 words
A resin as claimed in claim 1, further comprising a cross-linking agent selected from the group consisting of, bis-maleimido capped poly(alkylene oxide), bis-maleimido capped (poly)siloxane, -bis-maleimides of hydrazine, 2,4-diaminotoluene, hexamethylenediamine, dodecamethylenediamine, and substituted and unsubstituted diamines of the formula ##STR4##
Claim 7
Dependent Claim
31 words
A resin as claimed in claim 5, wherein the polymer which comprises moieties of a 2,5-dialkyl substituted furan is obtained by furanizing a copolymer of carbon monoxide and olefinically unsaturated compounds.
Claim 8
Dependent Claim
15 words
A resin as claimed in claim 6, wherein the olefinically unsaturated compounds are aliphatic α-olefins.
Claim 9
Dependent Claim
12 words
A resin as claimed in claim 7, wherein said α-olefins is propene.
Claim 10
Dependent Claim
26 words
A resin as claimed in claim 1 wherein the polymer from which it is obtained has a number average molecular weight in the range of 1,000-25,000.
Claim 11
Dependent Claim
37 words
A resin as claimed in claim 1, wherein the polymer from which it is obtained has a number average molecular weight of above 1000 and contains on average at least 4 2,5-dialkyl substituted furan groups per molecule.
Claim 12
Dependent Claim
27 words
A resin as claimed in claim 1, wherein the 2,5-dialkyl substituted furan groups and the dienophiles are combined in a molar ratio of from 5:1 to 1:1.
Claim 13
Dependent Claim
30 words
A re-moldable cross-linked resin which comprises a polymer which comprises moieties of a 2,5-dialkyl substituted furan and a cross-linking agent which comprises two or more dienophiles in its molecular structure.
Claim 14
Dependent Claim
30 words
A re-moldable cross-linked resin which comprises a polymer which comprises moieties of a 2,5-dialkyl substituted furan and a cross-linking agent which comprises two or more dienophiles in its molecular structure.
Claim 15
Dependent Claim
28 words
A re-moldable cross-linked resin which comprises a polymer comprising moieties of a dienophile and a cross-linking agent comprising two or more 2,5-dialkyl substituted furans in its molecular structure.
Claim 16
Dependent Claim
28 words
A re-moldable cross-linked resin which comprises a polymer comprising moieties of a dienophile and a cross-linking agent comprising two or more 2,5-dialkyl substituted furans in its molecular structure.
Claim 17
Dependent Claim
17 words
A re-moldable cross-linked resin which comprises moieties of a 2,5-dialkyl substituted furan and moieties of a dienophile.
Claim 18
Dependent Claim
17 words
A re-moldable cross-linked resin which comprises moieties of a 2,5-dialkyl substituted furan and moieties of a dienophile.
Claim 19
Dependent Claim
50 words
A process for re-molding a cross-linked resin comprising heating a resin as claimed in claim 1 at a temperature which is sufficiently high to convert it into a liquid, molding the obtained liquid into the desired shape and cooling to a temperature which is sufficiently low to solidify the resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-23 | 2000-12-23 | 2001-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-23 | 2004-12-23 | 2005-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-23 | 2008-12-23 | 2009-06-24 | $7700.00 | Window Closed / Lapsed |