US4169867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compositions based on oxymethylene polymers
Assignee: Hoechst AG
•
Filing: 1975-10-15
•
Granted: 1979-10-02
•
Expires: 1995-10-15
Abstract
Abstract A thermoplastic molding composition being a suitable material for technical purposes comprises a mixture of an oxymethylene polymer and of an elastomeric copolyester having short-chain and long-chain diol elements as well. The molding composition is prepared by mixing and homogenizing the components and may contain usual additives, especially stabilizers.
Inventors
- 👤 Karlheinz Burg
- 👤 Gunther Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:42
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/18; C08L; C08L59/00; C08L59/02; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
Molding composition consisting essentially of a mixture of (A) from 99.9 to 50 weight % of an oxymethylene polymer which contains optionally from 0.1 to 20 weight % of oxyalkylene units having from 2 to 8 adjacent carbon atoms in the main chain, and (B) from 0.1 to 50 weight % of a copolyester consisting of (a) from 75 to 35 weight % of units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of at most 300 and of a diol having a molecular weight of from 350 to 8,000, and (b) from 25 to 65 weight % of units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of at most 300 and of a diol having a molecular weight of at most 250.
Claim 2
Dependent Claim
136 words
Molding composition consisting essentially of a mixture of (A) from 99.9 to 50 weight % of an oxymethylene polymer which contains optionally from 0.1 to 20 weight % of oxyalkylene units having from 2 to 8 adjacent carbon atoms in the main chain, and (B) from 0.1 to 50 weight % of a copolyester consisting of (a) from 75 to 35 weight % of units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of at most 300 and of a diol having a molecular weight of from 350 to 8,000, and (b) from 25 to 65 weight % of units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of at most 300 and of a diol having a molecular weight of at most 250.
Claim 3
Dependent Claim
92 words
Molding composition according to claim 1, wherein the oxymethylene polymer is a copolymer of trioxane and of a compound of the formula ##STR6## wherein R represents a hydrogen atom, an alkyl radical having from 1 to 6 carbon atoms, an alkoxymethyl radical having from 2 to 6 carbon atoms, a phenyl radical or a phenoxymethyl radical, x is 1, 2 or 3, y is 1, 2 or 3 with x being zero and z being 2 and z is 3, 4, 5 or 6 with x being zero and y being 1.
Claim 4
Dependent Claim
23 words
Molding composition according to claim 1 wherein the copolyester-forming dicarboxyic acid is an aromatic dicarboxylic acid having from 8 to 16 carbon atoms.
Claim 5
Dependent Claim
15 words
Molding composition according to claim 3 wherein the aromatic dicarboxylic acid is a phenylene-dicarboxylic acid.
Claim 6
Dependent Claim
36 words
Molding composition according to claim 1 wherein the copolyester-forming diol of a molecular weight of from 350 to 8,000 is a poly(alkylene oxide) diol, the alkylene group of which has from 3 to 8 carbon atoms.
Claim 7
Dependent Claim
29 words
Molding composition according to claim 1 wherein the copolyester-forming diol of a molecular weight of at most 250 is an aliphatic diol having from 2 to 15 carbon atoms.
Claim 8
Dependent Claim
12 words
Molding composition according to claim 6 wherein the aliphatic diol is butanediol-(1,4).
Claim 9
Dependent Claim
46 words
Process for the manufacture of a molding composition according to claim 1 which comprises that the components (A) and (B) each as a powder or a granule are mixed at room temperature and subsequently homogenized at a temperature above the crystallite melting point of component (A).
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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |