Patent US2808492A successfully refreshed from Google Patents.
Patent US3681475A successfully refreshed from Google Patents.
US3681475A
Expired / Lapsed
US
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Thermoplastic molding compositions
Assignee: Rohm and Haas Co
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Filing: 1969-10-06
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Granted: 1972-08-01
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Expires: 1989-10-06
Abstract
Abstract Rigid acrylic thermoplastic molding compositions are provided with improved extensibility and processability. The molding compositions comprise acrylic thermoplastic polymer modified with up to 5 percent elastomer. Preferred are durable compositions comprising acrylic polymers modified with acrylic elastomers.
Inventors
- 👤 Allan John Spilner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:06
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F279/00; C08F279/02; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L33/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
The molding composition of claim 1 wherein the ethylenically unsaturated units are selected from the group consisting of styrene, substituted styrene, alkyl methacrylate, acrylonitrile and methacrylonitrile and the polyethylenically unsaturated units are selected from the group consisting of 1,3-butylene diacrylate and dimethacrylate, trimethylolpropane trimethacrylate, di- and trivinyl benzene, vinyl acrylate and methacrylate, allyl and methallyl acrylates and methacrylates, and bis-acrylamides.
Claim 2
Dependent Claim
16 words
The molding composition of claim 1 wherein the elastomer comprises more than one stage prepared sequentially.
Claim 3
Dependent Claim
28 words
The molding composition of claim 1 wherein said final stage is polymerized from a monomer mixture comprising a crosslinking monomer and at least 50 weight percent methyl methacrylate.
Claim 4
Dependent Claim
22 words
The molding composition of claim 1 wherein said elastomer is polymerized from a monomer mixture comprising butyl acrylate, styrene and butylene diacrylate.
Claim 5
Dependent Claim
21 words
The molding coMposition of claim 5 wherein said final stage is polymerized from a monomer mixture consisting essentially of methyl methacrylate.
Claim 6
Dependent Claim
21 words
The molding composition of claim 1 comprising 99 to 96 percent rigid acrylic thermoplastic polymer and 1 to 4.0 percent elastomer.
Claim 7
Dependent Claim
27 words
The molding composition of claim 1 wherein the rigid acrylic themoplastic polymer is polymerized from a monomer mixture comprising at least 50 percent by weight methyl methacrylate.
Claim 8
Dependent Claim
35 words
The molding composition of claim 1 wherein the rigid acrylic thermoplastic polymer is polymerized from a monomer mixture comprising 90 to 100 percent by weight of alkyl and aryl esters of acrylic and methacrylic acid.
Claim 9
Dependent Claim
27 words
The molding composition of claim 1 wherein the rigid acrylic thermoplastic polymer is polymerized from a monomer mixture comprising 90 to 100 percent by weight methyl methacrylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |