US4535127A
Expired / Lapsed
US
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Polyacetal copolymers and process for production thereof
Assignee: Asahi Kasei Corp
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Filing: 1984-03-13
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Granted: 1985-08-13
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Expires: 2004-03-13
Abstract
Abstract A polyacetal copolymer composed of an acetal polymer portion and a thermoplastic elastomer portion having soft segments and hard segments, the second-order transition temperature of said elastomer portion being in the range of -120° to 40° C. A process for producing such a polyacetal copolymer is also described.
Inventors
- 👤 Kazuhiko Matsuzaki
- 👤 Minoru Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:34
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08G; C08G2/00; C08G2/38; C08L67/00; C08L75/00; C08L75/04; C08L77/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
38 words
A polyacetal copolymer composed of an acetal polymer portion and a thermoplastic elastomer portion having soft segments and hard segments, the second-order transition temperature of said elastomer portion being in the range of from -120° to 40° C.
Claim 2
Dependent Claim
38 words
A polyacetal copolymer composed of an acetal polymer portion and a thermoplastic elastomer portion having soft segments and hard segments, the second-order transition temperature of said elastomer portion being in the range of from -120° to 40° C.
Claim 3
Dependent Claim
23 words
A copolymer according to claim 1, wherein the acetal polymer portion is an acetal homopolymer consisting of recurring oxymethylene units --CH 2 O--.
Claim 4
Dependent Claim
59 words
A copolymer according to claim 1, wherein the acetal polymer portion has a structure in which oxyalkylene units ##STR15## (where R o 's, which may be the same or different, are selected from hydrogen atom, alkyl groups and phenyl groups and m is an integer of from 2 to 6) are randomly inserted into a chain of oxymethylene units.
Claim 5
Dependent Claim
28 words
A copolymer according to claim 1, wherein the melt index of the polyacetal copolymer is in the range of from 0.01 to 70 (g/10 minutes at 190° C.).
Claim 6
Dependent Claim
27 words
A copolymer according to claim 1, wherein the thermoplastic elastomer portion content of the polyacetal copolymer is in the range of from 0.5 to 50% by weight.
Claim 7
Dependent Claim
69 words
A copolymer according to claim 1, wherein the thermoplastic elastomer is selected from elastomers of a polyolefin which contains polyolefin as the hard segment, elastomers of a polystyrene which contains polystyrene as the hard segment, elastomers of a polyester which contains polyester as the hard segment, elastomers of a polyamide which contains polyamide as the hard segment, and elastomers of a polyurethane which contains polyurethane as the hard segment.
Claim 8
Dependent Claim
31 words
A copolymer according to claim 6, wherein the elastomer of the polyolefin which contains polyolefin as the hard segment is an (unsaturated compound)-modified ethylene-propylene copolymer or an (unsaturated compound)-modified ethylene-propylene-diene terpolymer.
Claim 9
Dependent Claim
41 words
A copolymer according to claim 6, wherein the elastomer of the polystyrene which contains polystyrene as the hard segment is selected from polystyrene-polybutadiene block copolymers, hydrogenated polystyrene-polybutadiene block copolymers, (unsaturated compound)-modified polystyrene-polybutadiene block copolymers and (unsaturated compound)-modified hydrogenated polystyrene-polybutadiene block copolymers.
Claim 10
Dependent Claim
34 words
A copolymer according to claim 6, wherein the elastomer of the polyester which contains polyester as the hard segment is a poly(butylene terephthalate)-poly(tetramethylene glycol) block copolymer or a poly(ethylene butylene terephthalate)-poly(tetramethylene glycol) block copolymer.
Claim 11
Dependent Claim
33 words
A copolymer according to claim 6, wherein the elastomer of the polyamide which contains polyamide as the hard segment is a nylon 6-poly(propylene glycol) block copolymer or a nylon 6-poly(tetramethylene glycol) block copolymer.
Claim 12
Dependent Claim
31 words
A copolymer according to claim 6, wherein the elastomer of the polyurethane which contains polyurethane as the hard segment is a polyurethane formed from 4,4-diphenylmethane diisocyanate, tetramethylene glycol and poly(tetramethylene glycol).
Claim 13
Dependent Claim
76 words
A process for producing a polyacetal copolymer, which comprises homopolymerizing formaldehyde or trioxane or copolymerizing a compound selected from formaldehyde, trioxane and polyoxymethylenes with a cyclic ether in the presence of a thermoplastic elastomer having soft segments and hard segments and at least one functional group selected from hydroxyl group, carboxyl group, carboxylic anhydride groups and amino group, the second order transition temperature of said elastomer being in the range of from -120° to 40° C.
Claim 14
Dependent Claim
76 words
A process for producing a polyacetal copolymer, which comprises homopolymerizing formaldehyde or trioxane or copolymerizing a compound selected from formaldehyde, trioxane and polyoxymethylenes with a cyclic ether in the presence of a thermoplastic elastomer having soft segments and hard segments and at least one functional group selected from hydroxyl group, carboxyl group, carboxylic anhydride groups and amino group, the second order transition temperature of said elastomer being in the range of from -120° to 40° C.
Claim 15
Dependent Claim
13 words
A process according to claim 12, wherein the cyclic ether is ethylene oxide.
Claim 16
Dependent Claim
24 words
A process according to claim 12, wherein the cyclic ether is a compound selected from ethylene glycol formal, diethylene glycol formal and 1,4-butanediol formal.
Claim 17
Dependent Claim
28 words
A process according to claim 12, wherein the homopolymerization of formaldehyde or trioxane is carried out at a temperature in the range of from -20° to 230° C.
Claim 18
Dependent Claim
37 words
A process according to claim 12, wherein the copolymerization of a compound selected from formaldehyde, trioxane and polyoxymethylenes with the cyclic ether is carried out at a temperature in the range of from -70° to 230° C.
Claim 19
Dependent Claim
19 words
A copolymer according to claim 3, wherein the oxyalkylene unit is an oxyethylene unit --(CH 2 ) 2 O--.
Claim 20
Dependent Claim
19 words
A copolymer according to claim 3, wherein the oxyalkylene unit is an oxytetramethylene unit --(CH 2 ) 4 O--.
References Cited (Backward Citations)
DE229035C
Cited
US3017389A
Cited
US3218295A
Cited
DE1745698A1
Cited
US3346663A
Cited
US3337503A
Cited
US3364157A
Cited
US3580973A
Cited
DE2062735A1
Cited
GB1380681A
Cited
US3872182A
Cited
US3925505A
Cited
US4003960A
Cited
US4277577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |