US4363853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt polyester
Assignee: Asahi Kasei Corp
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Filing: 1981-03-10
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Granted: 1982-12-14
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Expires: 2001-03-10
Abstract
Abstract A polyester comprising acid monomer units of terephthalic acid, succinic acid, glutaric acid and isophthalic acid and/or an aliphatic dicarboxylic acid having 6 to 20 carbon atoms and glycol monomer units of a C 2-10 alkylene glycol in specific proportions has been found to be extremely useful as hot-melt materials such as a hot-melt adhesive, a hot-melt coating material, a hot-melt sealing material and a hot-melt filling material. The present hot-melt polyester has excellent melting characteristics, that is, it can be rapidly molten from a solid state with a high sensitivity to heating to give a molten polyester having a stably low viscosity that does not almost undergo change according to variation of temperature and having an excellent fluidity. Further, the present hot-melt polyester has a good affinity for objects (e.g. adherend) to which the polyester is applied and exhibits excellent bonding or adhesive performance. Moreover, the present hot-melt polyester has improved suppleness and flexibility. The mechanical strength, stretchability and flexibility of the hot-melt adhesive can be much improved while maintaining the melt viscosity thereof at a low level. Thus, there is provided a hot-melt polyester having a well-balanced combination of physical properties that is very important to hot-melt materials.
Inventors
- 👤 Kazuyoshi Imamura
- 👤 Norio Akimoto
- 👤 Shozo Awaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C09; C09D; C09D167/00; C09D167/02; C09J; C09J167/00; C09J167/02; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2891; Y10T428/31504; Y10T428/31551; Y10T428/31616; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/4935
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
176 words
A hot-melt polyester having: (a) acid components consisting essentially of: (I) terephthalic acid monomer units, (II) succinic acid monomer units, (III) glutaric acid monomer units and (IV) a member selected from the group consisting of isophthalic acid monomer units, monomer units of an unsubstituted straight chain aliphatic dicarboxylic acid having 6 to 20 carbon atoms and a combination thereof, the proportions of the components (I), (II), (III) and (IV) satisfying the relationships as represented by the following formulae: the component (I)=40 to 80 mole % based on the total amount of the components (I), (II), (III) and (IV); the components (II)+(III)=2 to 50 mole % based on the total amounts of the components (I), (II), (III) and (IV); the components (IV)=5 to 50 mole % based on the total amount of the components (I), (II), (III) and (IV); and the molar ratio of the component (II) to the component (III)=1/9 to 9/1, and (b) a glycol component comprising monomer units of at least one straight chain or branched alkylene glycol having 2 to 10 carbon atoms.
Claim 2
Dependent Claim
176 words
A hot-melt polyester having: (a) acid components consisting essentially of: (I) terephthalic acid monomer units, (II) succinic acid monomer units, (III) glutaric acid monomer units and (IV) a member selected from the group consisting of isophthalic acid monomer units, monomer units of an unsubstituted straight chain aliphatic dicarboxylic acid having 6 to 20 carbon atoms and a combination thereof, the proportions of the components (I), (II), (III) and (IV) satisfying the relationships as represented by the following formulae: the component (I)=40 to 80 mole % based on the total amount of the components (I), (II), (III) and (IV); the components (II)+(III)=2 to 50 mole % based on the total amounts of the components (I), (II), (III) and (IV); the components (IV)=5 to 50 mole % based on the total amount of the components (I), (II), (III) and (IV); and the molar ratio of the component (II) to the component (III)=1/9 to 9/1, and (b) a glycol component comprising monomer units of at least one straight chain or branched alkylene glycol having 2 to 10 carbon atoms.
Claim 3
Dependent Claim
32 words
A hot-melt polyester according to claim 1, wherein said polyester has a melt viscosity, as measured at a temperature 40° C. higher than the softening point thereof, of 100 to 500,000 centipoises.
Claim 4
Dependent Claim
51 words
A hot-melt polyester according to claim 1, wherein said component (IV) comprises isophthalic acid monomer units and monomer units of at least one straight chain aliphatic dicarboxylic acid having 6 to 20 carbon atoms, the molar ratio of the former monomer units to the latter monomer units being 100/0 to 10/90.
Claim 5
Dependent Claim
36 words
A hot-melt polyester according to any one of claims 1, 2 or 3 wherein said straight chain aliphatic dicarboxylic acid having 6 to 20 carbon atoms is adipic acid, azelaic acid, sebacic acid or 1,10-decanedicarboxylic acid.
Claim 6
Dependent Claim
40 words
A hot-melt polyester according to claim 1 or 2, wherein said component (IV) comprises isophthalic acid monomer units and adipic acid monomer units, the molar ratio of the former monomer units to the latter monomer units being 2/8 to 8/2.
Claim 7
Dependent Claim
20 words
An article comprising two adherends bound together with the hot-melt polyester of any one of claims 1, 2 or 3.
Claim 8
Dependent Claim
19 words
An article comprising a substrate coated with the hot-melt polyester of any one of claims 1, 2 or 3.
Claim 9
Dependent Claim
26 words
An article comprising a substrate with a void therein, the void being filled with the hot-melt polyester of any one of claims 1, 2 or 3.
Claim 10
Dependent Claim
14 words
An article comprising two adherends bound together with the hot-melt polyester of claim 4.
Claim 11
Dependent Claim
13 words
An article comprising a substrate coated with the hot-melt polyester of claim 4.
Claim 12
Dependent Claim
20 words
An article comprising a substrate with a void therein, the void being filled with the hot-melt polyester of claim 4.
Claim 13
Dependent Claim
14 words
An article comprising two adherends bound together with the hot-melt polyester of claim 5.
Claim 14
Dependent Claim
13 words
An article comprising a substrate coated with the hot-melt polyester of claim 5.
Claim 15
Dependent Claim
20 words
An article comprising a substrate with a void therein, the void being filled with the hot-melt polyester of claim 5.
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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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |