US4254232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyglutarimides
Assignee: Rohm and Haas Co
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Filing: 1978-12-08
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Granted: 1981-03-03
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Expires: 1998-12-08
Abstract
Abstract Compositions having high notched Izod impact strength and Gardner VHIT impact value are achieved by blending polyglutarimides, multiple stage polymers based on butadiene or acrylates, and polycarbonate in a weight ratio such that the polycarbonate comprises about 12 to 25% of the blend.
Inventors
- 👤 Donald S. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:24
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
Composition comprising a blend of (a) a thermoplastic polyglutarimide polymer containing units of the formula ##STR2## wherein R 1 , R 2 , and R 3 independently represent hydrogen or C 1 to C 20 unsubstituted or substituted alkyl, aryl, or mixtures thereof, (b) a multiple stage polymer having a first stage polymerized from a predominantly butadiene or alkyl acrylate monomer system, and (c) polycarbonate, wherein the polycarbonate comprises about 12 to 25% by weight of said blend, the polymer containing imide units comprises about 20 to 80% by weight of said blend, and the notched Izod impact strength of the composition is greater than 3 ft. lbs./in. at 25° C.
Claim 2
Dependent Claim
111 words
Composition comprising a blend of (a) a thermoplastic polyglutarimide polymer containing units of the formula ##STR2## wherein R 1 , R 2 , and R 3 independently represent hydrogen or C 1 to C 20 unsubstituted or substituted alkyl, aryl, or mixtures thereof, (b) a multiple stage polymer having a first stage polymerized from a predominantly butadiene or alkyl acrylate monomer system, and (c) polycarbonate, wherein the polycarbonate comprises about 12 to 25% by weight of said blend, the polymer containing imide units comprises about 20 to 80% by weight of said blend, and the notched Izod impact strength of the composition is greater than 3 ft. lbs./in. at 25° C.
Claim 3
Dependent Claim
18 words
Composition of claim 1 wherein the Gardner impact VHIT value is at least 100 in.-lbs. at 25° C.
Claim 4
Dependent Claim
47 words
Composition of claim 1 wherein component (a) is comprised of two polyglutarimide polymers, the first having a Vicat value above about 170° C. and the second having a Vicat value below about 160° C., the weight ratio of said two polymers being between about 1:2 and 2:1.
Claim 5
Dependent Claim
21 words
Composition of claim 1 wherein the multiple stage polymer (b) is selected from the group consisting of methacrylate-butadiene-styrene and acrylonitrile-butadiene-styrene polymers.
Claim 6
Dependent Claim
25 words
The composition of claim 1 wherein the multiple stage polymer (b) has a crosslinked butyl acrylate polymer first stage and a methyl methacrylate final stage.
Claim 7
Dependent Claim
35 words
Composition of claim 1 wherein multiple stage polymer (b) has a rubbery first stage and a hard final stage, and the ratio of rubbery first stage to hard final stage is about 1:1 to 9:1.
Claim 8
Dependent Claim
18 words
Composition of claim 1 wherein component (c) has a weight average molecular weight of about 20,000 to 1,000,000.
Claim 9
Dependent Claim
47 words
Method of improving the notched Izod impact strength and Gardner impact value of thermoplastic polyglutarimide polymers comprising blending therewith a butadiene-based or an acrylate-based multiple stage polymer and a polycarbonate, in a weight ratio such that the polycarbonate comprises about 12 to 25% of the resultant blend.
Claim 10
Dependent Claim
47 words
Method of improving the notched Izod impact strength and Gardner impact value of thermoplastic polyglutarimide polymers comprising blending therewith a butadiene-based or an acrylate-based multiple stage polymer and a polycarbonate, in a weight ratio such that the polycarbonate comprises about 12 to 25% of the resultant blend.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |