Patent US4277577A successfully refreshed from Google Patents.
US4277577A
Expired / Lapsed
US
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Thermoplastic molding compositions on the basis of oxymethylene polymers
Assignee: Hoechst AG
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Filing: 1979-04-23
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Granted: 1981-07-07
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Expires: 1999-04-23
Abstract
Abstract The invention provides a molding composition of a mixture of an oxymethylene polymer, an elastomer having a softening temperature of below the crystallite melting point of the oxymethylene polymer and a second order transition temperature of from -120° to +30° C., and a segmented thermoplastic copolyester. The molding composition of the invention is distinguished by improved mechanical properties, especially with respect to the impact strength.
Inventors
- 👤 Karlheinz Burg
- 👤 Werner Schmieder
- 👤 Ernst Wolters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:13
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08L21/00; C08L23/00; C08L23/02; C08L31/00; C08L31/02; C08L33/00; C08L33/04; C08L33/06; C08L67/00; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
Molding composition consisting essentially of a mixture of (A) from 99.89 to 60 weight % of an oxymethylene polymer; (B) from 0.1 to 40 weight % of an elastomer having a softening temperature of below the crystallite melting point of the oxymethylene polymer according to (A) and a second order transition temperature of from -120° to +30° C.; and (C) from 0.01 to 20 weight % of a segmented thermoplastic copolyester.
Claim 2
Dependent Claim
71 words
Molding composition consisting essentially of a mixture of (A) from 99.89 to 60 weight % of an oxymethylene polymer; (B) from 0.1 to 40 weight % of an elastomer having a softening temperature of below the crystallite melting point of the oxymethylene polymer according to (A) and a second order transition temperature of from -120° to +30° C.; and (C) from 0.01 to 20 weight % of a segmented thermoplastic copolyester.
Claim 3
Dependent Claim
23 words
Molding composition as claimed in claim 1, wherein component A has a reduced specific viscosity of from 0.5 to 1.5 dl/g -1 .
Claim 4
Dependent Claim
144 words
Molding composition as claimed in claims 1 or 2, wherein component A is a copolymer of trioxan and a compound of the formula ##STR7## wherein (A) R 1 and R 2 are identical or different, and each represent a hydrogen atom, an aliphatic alkyl radical having from 1 to 6, preferably 1, 2, 3 or 4 carbon atoms, or a phenyl radical; and (a) x is 1, 2 or 3 and y is zero; or (b) x is zero, y is 1, 2 or 3, and z is 2; or (c) x is zero, y is 1 and z is 3, 4, 5 or 6; or (B) R 1 is an alkoxymethyl radical having from 2 to 6, preferably 2, 3 or 4 carbon atoms, or a phenoxymethyl radical where x is 1 and y is zero, and R 2 is as defined above.
Claim 5
Dependent Claim
97 words
Molding composition as claimed in claims 1, 2 or 3, wherein component B is a homo- or copolymer of olefinically unsaturated compounds of the formula ##STR8## in which R 1 is a hydrogen atom or a methyl or ethyl radical, and R 2 is a hydrogen atom, a carboxyl group or the corresponding salts with a metal of the Ist to IIIrd group of the Periodic Table, an alkylcarboxy group having from 2 to 10 carbon atoms, an acyloxy group having from 2 to 5 carbon atoms, a cyano group, a phenyl radical or a vinyl radical.
Claim 6
Dependent Claim
24 words
Molding composition as claimed in claims 1, 2, 3 or 4, wherein component B has an average molecular weight of from 5000 to 150.000.
Claim 7
Dependent Claim
96 words
Molding composition as claimed in claims 1, 2, 3, 4 or 5, wherein component C is a copolyester consisting of (a) from 75 to 35 weight % units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of a maximum 300 and a diol having a molecular weight of from 350 to 8000, and (b) from 25 to 65 weight % units of an ester of at least one aromatic dicarboxylic acid having a molecular weight of a maximum 300 and a diol having a molecular weight of a maximum 250.
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |