US3980734A
Expired / Lapsed
US
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Thermoplastic moulding compositions based on poly (oxymethylene)
Assignee: Hoechst AG
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Filing: 1975-05-21
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Granted: 1976-09-14
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Expires: 1995-05-21
Abstract
Abstract Branched or crosslinked poly(exymethylenes) are suitable as nucleating agents for linear poly(oxymethylenes). For ameliorating the mechanical properties of shaped articles, being prepared of such moulding compositions which contain nucleating agents, high molecular weight polymers are used having a certain softening point, second order transition temperature and particle size, and which are blended into the moulding compositions. The modified moulding compositions can be processed in the thermoplastic state and are suitable as industrially useful materials for preparing semi-finished articles and finished products.
Inventors
- 👤 Karlheinz Burg
- 👤 Rudolf Kern
- 👤 Heinz Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08L23/00; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L71/00; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
160 words
A thermoplastic molding composition consisting essentially of a mixture of A. 99.9 to 90 percent by weight of a mixture of a. 99.999 to 90 percent by weight of linear poly(oxymethylene) having chemically stabilized end groups and b. as a nucleating agent therefor 0.001 to 10 percent by weight of a branched or crosslinked poly(oxymethylene), and B. as an additional modifying component, 0.1 to 10 percent by weight of a polymer having an average molecular weight of from 1,000 to 1,000,000, the softening point of which is below the crystallite melting point of the poly(oxymethylene) of (a) and the second order transition temperature of which is -120° to +30°C, said additional component being present in the mixture as particles having diameters of from 0.1 to 5 microns, the weight percentages of (a) and (b) being calculated on the sum of (a) and (b), and the weight percentages of A) and B) being calculated on the sum of A) and B).
Claim 2
Dependent Claim
160 words
A thermoplastic molding composition consisting essentially of a mixture of A. 99.9 to 90 percent by weight of a mixture of a. 99.999 to 90 percent by weight of linear poly(oxymethylene) having chemically stabilized end groups and b. as a nucleating agent therefor 0.001 to 10 percent by weight of a branched or crosslinked poly(oxymethylene), and B. as an additional modifying component, 0.1 to 10 percent by weight of a polymer having an average molecular weight of from 1,000 to 1,000,000, the softening point of which is below the crystallite melting point of the poly(oxymethylene) of (a) and the second order transition temperature of which is -120° to +30°C, said additional component being present in the mixture as particles having diameters of from 0.1 to 5 microns, the weight percentages of (a) and (b) being calculated on the sum of (a) and (b), and the weight percentages of A) and B) being calculated on the sum of A) and B).
Claim 3
Dependent Claim
43 words
The thermoplastic molding composition as defined in claim 1 wherein the linear poly(oxymethylene) (a) is represented by a polymer selected from homopolymers of formaldehyde, homopolymers of trioxane, and copolymers of trioxane with at least one compound reacting monofunctionally and being copolymerizable with trioxane.
Claim 4
Dependent Claim
58 words
The thermoplastic molding composition as defined in claim 1 wherein the linear poly(oxymethylene) (a) is a copolymer of 99.9 to 80 weight percent of trioxane with 0.1 to 20 weight percent of a compound selected from cyclic ethers having from 3 to 5 ring members and cyclic acetals, other than trioxane, having from 5 to 11 ring members.
Claim 5
Dependent Claim
35 words
The thermoplastic molding composition as defined in claim 1 wherein the linear poly(oxymethylene) (a) is a copolymer of 99.9 to 80 weight percent of trioxane with 0.1 to 20 weight percent of a linear polyacetal.
Claim 6
Dependent Claim
58 words
The thermoplastic molding composition as defined in claim 1, wherein the nucleating agent (b) is a copolymer of trioxane with at least one compound reacting multifunctionally and being copolymerizable with trioxane, or a copolymer of trioxane with at least one compound reacting monofunctionally and copolymerizable with trioxane and at least one compound reacting multifunctionally and copolymerizable with trioxane.
Claim 7
Dependent Claim
102 words
The thermoplastic molding composition as defined in claim 5, wherein in the nucleating agent (b) the multifunctionally reacting compound is selected from the group consisting of alkyl glycidyl formal having the formula IV ##STR10## wherein R represents an aliphatic alkyl radical having from 1 to 10 carbon atoms; polyglycol diglycidyl ether having the formula V ##STR11## ##STR12## wherein n represents an integer from 2 to 5; alkanediol diglycidyl ether having the formula VI ##STR13## wherein w represents an integer from 2 to 6; and bis-(alkanetriol)-triformal having the formula VII ##STR14## wherein p and q represent each an integer from 3 to 9.
Claim 8
Dependent Claim
35 words
The thermoplastic molding composition as defined in claim 1, wherein the nucleating agent (b) is branched or crosslinked poly(oxymethylene) obtained by branching or crosslinking reactions with a linear poly(oxymethylene) having lateral or chain-linked functional groups.
Claim 9
Dependent Claim
57 words
The thermoplastic molding composition as defined in claim 1, wherein the nucleating agent (b) is a branched and crosslinked poly(oxymethylene) obtained by copolymerization of trioxane with at least one compound reacting monofunctionally and being copolymerizable with trioxane and with a branched or crosslinked polyether, or by reaction of a linear poly(oxymethylene) with a branched or crosslinked polyether.
Claim 10
Dependent Claim
31 words
The thermoplastic molding composition as defined in claim 1, wherein the nucleating agent (b) is a copolymer obtained by a reaction of a linear poly(oxymethylene) with a branched or crosslinked polyether.
Claim 11
Dependent Claim
76 words
The thermoplastic molding composition as defined in claim 1, wherein the additional modification component (B) is present in a concentration of from 0.1 to 5 percent by weight, and wherein component (B) is a polymer having an average molecular weight from 1,000 to 300,000, a softening point from +50° to 160°C, a second order transition temperature of from -80° to 0°C, and is present in the mixture as particles having diameters from 0.1 to 3 microns.
Claim 12
Dependent Claim
72 words
The thermoplastic molding composition as defined in claim 1, wherein component (B) is a homopolymer or copolymer of an olefinically unsaturated compound having the formula ##STR15## wherein R 1 is a hydrogen atom or a methyl radical, and wherein R 2 represents a hydrogen atom, a carboxylic group, an alkylcarboxy group having from 2 to 10 carbon atoms, an acyloxy group having from 2 to 5 carbon atoms, or a vinyl radical.
Claim 13
Dependent Claim
22 words
The thermoplastic molding composition as defined in claim 1, wherein component (B) is a homopolymer or a copolymer of a cyclic ether.
Claim 14
Dependent Claim
15 words
The thermoplastic molding compositions as defined in claim 1, wherein component (B) is a polyester.
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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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |