Patent US4578422A successfully refreshed from Google Patents.
US4578422A
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Acetal resin composition
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1983-10-08
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Granted: 1986-03-25
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Expires: 2003-10-08
Abstract
Abstract This invention relates to a glass-reinforced acetal resin composition having excellent heat stability and mechanical strength. The resin composition contains both a polycyanate compound and an amino-substituted triazine and/or a cyanoguanidine compound as coupling agents. The resin composition of the invention is useful, for example, as a material for automotive parts and machine parts because of its higher mechanical strength and heat stability, especially the former, than conventional known glass-reinforced acetal resins.
Inventors
- 👤 Masanori Sakurai
- 👤 Junichi Miyawaki
- 👤 Toshikaju Umemura
- 👤 Toshikatsu Kawata
- 👤 Shinji Kiboshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:15
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
An acetal resin composition comprising (A) an acetal resin, (B) at least one member selected from the group consisting of (1) a polyfunctional cyanate ester or its prepolymer, (2) a mixture of a polyfunctional cyanate ester or its prepolymer and a polyfunctional maleimide or its prepolymer, and (3) a prepolymer of a polyfunctional cyanate ester and a polyfunctional maleimide, (C) an amino-substituted triazine and/or a cyanoguanidine compound, and (D) glass fibers and/or granular or powdery glass.
Claim 2
Dependent Claim
76 words
An acetal resin composition comprising (A) an acetal resin, (B) at least one member selected from the group consisting of (1) a polyfunctional cyanate ester or its prepolymer, (2) a mixture of a polyfunctional cyanate ester or its prepolymer and a polyfunctional maleimide or its prepolymer, and (3) a prepolymer of a polyfunctional cyanate ester and a polyfunctional maleimide, (C) an amino-substituted triazine and/or a cyanoguanidine compound, and (D) glass fibers and/or granular or powdery glass.
Claim 3
Dependent Claim
18 words
The composition set forth in claim 1 wherein the acetal resin (A) is composed mainly of oxymethylene units.
Claim 4
Dependent Claim
18 words
The composition set forth in claim 1 wherein the acetal resin (A) is composed substantially of oxymethylene units.
Claim 5
Dependent Claim
28 words
The composition set forth in claim 1 wherein the acetal resin (A) consists substantially of oxymethylene units and units of an oxyalkylene having at least 2 carbon atoms.
Claim 6
Dependent Claim
72 words
The composition set forth in claim 1 wherein the polyfunctional cyanate ester or its prepolymer is a compound represented by the following formula (1) R.sub.1 --O--C.tbd.N).sub.m ( 1) wherein R 1 represents an aromatic organic group having a valence of m, the cyanate ester groups (--O--C.tbd.N) are directly bonded to the aromatic ring of the organic group R 1 , and m represents an integer of at least 2, or its prepolymer.
Claim 7
Dependent Claim
68 words
The composition set forth in claim 1 wherein the polyfunctional maleimide or its prepolymer is a compound represented by the following formula (2) ##STR5## wherein R 2 represents an aromatic or aliphatic organic group having a valence of n, X 1 and X 2 represent a hydrogen atom, a halogen atom or a lower alkyl group, and n represents an integer of at least 2, or its prepolymer.
Claim 8
Dependent Claim
34 words
The composition set forth in claim 1 wherein the prepolymer of the polyfunctional cyanate ester and the polyfunctional maleimide is a prepolymer of the compound of formula (1) and the compound of formula (2).
Claim 9
Dependent Claim
86 words
The composition set forth in claim 1 wherein the amino-substituted triazine is a compound represented by the following formula (3) ##STR6## wherein R 1 , R 2 and R 3 are identical or different and each represents a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxy group, an aryl group, an arylalkyloxy group, or a substituted or unsubstituted amino group, provided that at least one of R 1 , R 2 and R 3 is a substituted or unsubstituted amino group.
Claim 10
Dependent Claim
45 words
The composition set forth in claim 1 wherein the cyanoguanidine compound is represented by the following formula (4) ##STR7## wherein R 1 and R 2 are identical or different and each represents a hydrogen atom, an alkyl group, a hydroxyalkyl group or an aryl group.
Claim 11
Dependent Claim
55 words
The composition set forth in claim 1 comprising 0.1 to 20 parts by weight of the compound (B), 0.1 to 20 parts by weight of the compound (C) and 5 to 70 parts by weight of the glass fibers and/or granular or powdery glass (D) per 100 parts by weight of the acetal resin (A).
Claim 12
Dependent Claim
18 words
The composition set forth in claim 2 wherein the acetal resin (A) is composed substantially of oxymethylene units.
Claim 13
Dependent Claim
28 words
The composition set forth in claim 2 wherein the acetal resin (A) consists substantially of oxymethylene units and units of an oxyalkylene having at least 2 carbon atoms.
References Cited (Backward Citations)
US4506053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |