Patent US4533689A successfully refreshed from Google Patents.
US4533689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant acrylic resin composition and process for its production
Assignee: Mitsubishi Chemical Corp
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Filing: 1983-08-17
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Granted: 1985-08-06
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Expires: 2003-08-17
Abstract
Abstract A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of alpha -methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.
Inventors
- 👤 Suehiro Tayama
- 👤 Norihisa Kusakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; B; B29; B29C; B29C39/00; B29C39/14; B29C39/16; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337; B29K; B29K2033/00; B29K2033/04; B29K2033/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of α-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.
Claim 2
Dependent Claim
60 words
A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of α-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.
Claim 3
Dependent Claim
18 words
The flame resistant acrylic resin composition according to claim 1, wherein the flame retardant is a halogenated polyphosphonate.
Claim 4
Dependent Claim
21 words
The flame resistant acrylic resin composition according to claim 1, wherein the flame retardant is a halogen-containing condensed phosphoric acid ester.
Claim 5
Dependent Claim
26 words
The flame resistant acrylic resin composition according to claim 1, wherein the flame retardant is a combination of a halogenated polyphosphonate and an alkyl acid phosphate.
Claim 6
Dependent Claim
29 words
The flame resistant acrylic resin composition according to claim 1, wherein the flame retardant is a combination of a halogen-containing condensed phosphoric acid ester and an alkyl acid phosphate.
Claim 7
Dependent Claim
18 words
The flame resistant acrylic resin composition according to claim 2, wherein the halogenated polyphosphonate is a chlorinated polyphosphonate.
Claim 8
Dependent Claim
18 words
The flame resistant acrylic resin composition according to claim 4, wherein the halogenated polyphosphonate is a chlorinated polyphosphonate.
Claim 9
Dependent Claim
21 words
The flame resistant acrylic resin composition according to claim 3, wherein the halogen-containing condensed phosphoric acid ester is a chlorinated polyphosphate.
Claim 10
Dependent Claim
21 words
The flame resistant acrylic resin composition according to claim 5, wherein the halogen-containing condensed phosphoric acid ester is a chlorinated polyphosphate.
Claim 11
Dependent Claim
36 words
The flame resistant acrylic resin composition according to claim 8, wherein the chlorinated polyphosphate has a phosphorus content of from 5 to 30% by weight and a chlorine content of from 20 to 40% by weight.
Claim 12
Dependent Claim
36 words
The flame resistant acrylic resin composition according to claim 9, wherein the chlorinated polyphosphate has a phosphorus content of from 5 to 30% by weight and a chlorine content of from 20 to 40% by weight.
Claim 13
Dependent Claim
44 words
The flame resistant acrylic resin composition according to claim 10, wherein the chlorinated polyphosphate has a phosphorus content of from 10 to 20% by weight, a chlorine content of from 20 to 40% by weight and a molecular weight of from 300 to 1000.
Claim 14
Dependent Claim
44 words
The flame resistant acrylic resin composition according to claim 11, wherein the chlorinated polyphosphate has a phosphorus content of from 10 to 20% by weight, a chlorine content of from 20 to 40% by weight and a molecular weight of from 300 to 800.
References Cited (Backward Citations)
FR1228328A
Cited
US3480598A
Cited
DE1927460A1
Cited
US3666712A
Cited
US3794616A
Cited
US4144387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |