Patent US4474927A successfully refreshed from Google Patents.
US4474927A
Expired / Lapsed
US
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Polyamide compositions toughened with crosslinked acrylic rubber
Assignee: EIDP Inc
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Filing: 1981-12-16
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Granted: 1984-10-02
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Expires: 2001-12-16
Abstract
Abstract Polyamide toughening crosslinked acrylic rubbers having an outer layer of an alkyl acrylate and a polyamide graft-linking monomer, this outer layer having a glass transition temperature of less than about 20° C.
Inventors
- 👤 Ernest R. Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:15
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A toughened polyamide composition comprising: (a) 60 to 99 weight percent polyamide; and (b) 1 to 40 weight percent of an emulsion polymerized crosslinked acrylic rubber comprising: (1) 0 to 99.0 percent of an inner phase of a crosslinked alkyl acrylate having 1 to 15 carbon atoms; and (2) at least 1.0 weight percent of an outer phase of a crosslinked alkyl acrylate wherein the alkyl group contains 1 to 15 carbon atoms and 0.1 to 15 weight percent of a polyamide graft-linking carboxylic acid monomer, said outer phase having a glass transition temperature less than about 20° C.
Claim 2
Dependent Claim
99 words
A toughened polyamide composition comprising: (a) 60 to 99 weight percent polyamide; and (b) 1 to 40 weight percent of an emulsion polymerized crosslinked acrylic rubber comprising: (1) 0 to 99.0 percent of an inner phase of a crosslinked alkyl acrylate having 1 to 15 carbon atoms; and (2) at least 1.0 weight percent of an outer phase of a crosslinked alkyl acrylate wherein the alkyl group contains 1 to 15 carbon atoms and 0.1 to 15 weight percent of a polyamide graft-linking carboxylic acid monomer, said outer phase having a glass transition temperature less than about 20° C.
Claim 3
Dependent Claim
99 words
A toughened polyamide composition comprising: (a) 60 to 99 weight percent polyamide; and (b) 1 to 40 weight percent of an emulsion polymerized crosslinked acrylic rubber comprising: (1) 10 to 99.0 percent of an inner phase of a crosslinked alkyl acrylate having 1 to 15 carbon atoms; and (2) 1.0 to 90.0 weight percent of an outer phase of an alkyl acrylate wherein the alkyl group contains 1 to 15 carbon atoms and 0.1 to 15 weight percent of a polyamide graft-linking carboxylic acid monomer said outer phase having a glass transition temperature of less than about 20° C.
Claim 4
Dependent Claim
99 words
A toughened polyamide composition comprising: (a) 60 to 99 weight percent polyamide; and (b) 1 to 40 weight percent of an emulsion polymerized crosslinked acrylic rubber comprising: (1) 10 to 99.0 percent of an inner phase of a crosslinked alkyl acrylate having 1 to 15 carbon atoms; and (2) 1.0 to 90.0 weight percent of an outer phase of an alkyl acrylate wherein the alkyl group contains 1 to 15 carbon atoms and 0.1 to 15 weight percent of a polyamide graft-linking carboxylic acid monomer said outer phase having a glass transition temperature of less than about 20° C.
Claim 5
Dependent Claim
27 words
The composition of claims 1 or 2 wherein the weight percent of polyamide is 70 to 85 and the weight percent of (b) is 15 to 30.
Claim 6
Dependent Claim
35 words
The composition of claim 1 or 2 wherein the inner phase alkyl acrylate is copolymerized with an ethylenically unsaturated comonomer present in an amount less than 50 percent by weight based on the alkyl acrylate.
Claim 7
Dependent Claim
35 words
The composition of claim 1 or 2 wherein the outer phase alkyl acrylate is copolymerized with an ethylenically unsaturated comonomer present in an amount less than 50 percent by weight based on the alkyl acrylate.
Claim 8
Dependent Claim
23 words
The composition of claim 1 or 2 wherein the inner phase contains up to 5.0 weight percent of a polyethylenically unsaturated graft-linking monomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |