Patent US4788253A successfully refreshed from Google Patents.
US4788253A
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US
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Thermoplastic molding material
Assignee: BASF SE
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Filing: 1987-04-17
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Granted: 1988-11-29
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Expires: 2007-04-17
Abstract
Abstract The invention relates to a thermoplastic molding material of an elastomeric polymer A, a shell B grafted to the polymer A, and a copolymer C as rigid matrix. The amount of polymer A is 1 to 25 percent by weight based on the weight of A+B+C. It has a glass transition temperature, Tg, of less than 0° C. and an average particle size of 200 to 750 nanometers (d 50 value of the integral mass distribution) and is composed of: 50 to 99.9 percent by weight of at least one alkylacrylate with 1 to 8 carbon atoms in the alkyl radical and 0.1 to 5 percent by weight of a polyfunctional monomer which has a crosslinking action. Grafting shell B represents 5 to 40 percent by weight based on A+B+C and is composed of at least one of the monomers of the group of (b 1 ) vinylaromatic monomers, and (b 2 ) the ethylenically unsaturated monomers. Grafting shell B is prepared in two stages with 30 to 70 percent by weight of the monomers b 1 being used in the first stage, and 30 to 70 percent by weight of a mixture of monomers b 1 and b 2 in a weight ratio of 90:10 to 60:40 being used in the second stage. Copolymer C is added in an amount of 35 to 94 percent by weight based on A+B+C and consists of a vinylaromatic monomer and an ethylenically unsaturated monomer. The molding material may contain commonly used additives in effective amounts and is used for the preparation of molded parts.
Inventors
- 👤 Juergen Hambrecht
- 👤 Burghard Schmitt
- 👤 Johann Swoboda
- 👤 Georg Wassmuth
- 👤 Claus Bernhard
- 👤 Rudolf Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L51/00; C08L51/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
A thermoplastic molding material consisting of (A) 1 to 25 percent by weight based on the weight of A+B+C of at least one elastomeric polymer which has a glass temperature, Tg, of less than 0° C. and consists of: (1) 50 to 99.9 percent by weight of at least one alkyl acrylate having 1 to 8 carbon atoms in the alkyl radical (2) 0.1 to 5 percent by weight of a polyfunctional monomer having a crosslinking effect and (B) 5 to 40 percent by weight based on the weight of A+B+C of a shell grafted to the elastomeric polymer A, the graft polymer having an average particle size of 200 to 750 nm (d 50 --value of the integral mass distribution) wherein the polymerization of the grafted shell consisting of (B) takes place in two stages with 30 to 70 percent by weight of a monomer (B1) selected from the group consisting of styrene, α-methylstyrene para-methylstyrene and tertiary butylstyrene in the first stage and 30 to 70 percent by weight of a mixture of the monomer (B1) and a monomer (B2) selected from the group consisting of ethylacrylate and methylacrylate in a weight ratio of 90:10 to 60:40 in the second stage and (C) 35 to 94 percent by weight based on the weight of A+B+C of a copolymer consisting of a styreneacrylonitrile copolymer.
Claim 2
Dependent Claim
224 words
A thermoplastic molding material consisting of (A) 1 to 25 percent by weight based on the weight of A+B+C of at least one elastomeric polymer which has a glass temperature, Tg, of less than 0° C. and consists of: (1) 50 to 99.9 percent by weight of at least one alkyl acrylate having 1 to 8 carbon atoms in the alkyl radical (2) 0.1 to 5 percent by weight of a polyfunctional monomer having a crosslinking effect and (B) 5 to 40 percent by weight based on the weight of A+B+C of a shell grafted to the elastomeric polymer A, the graft polymer having an average particle size of 200 to 750 nm (d 50 --value of the integral mass distribution) wherein the polymerization of the grafted shell consisting of (B) takes place in two stages with 30 to 70 percent by weight of a monomer (B1) selected from the group consisting of styrene, α-methylstyrene para-methylstyrene and tertiary butylstyrene in the first stage and 30 to 70 percent by weight of a mixture of the monomer (B1) and a monomer (B2) selected from the group consisting of ethylacrylate and methylacrylate in a weight ratio of 90:10 to 60:40 in the second stage and (C) 35 to 94 percent by weight based on the weight of A+B+C of a copolymer consisting of a styreneacrylonitrile copolymer.
Claim 3
Dependent Claim
26 words
The thermoplastic molding material of claim 1 wherein (A)(2) is selected from the group consisting of divinylbenzene, diallylmaleate, diallylfumarate, diallylphthalate and the acrylate ester of tricyclodecenylalcohol.
Claim 4
Dependent Claim
232 words
A thermoplastic molding material consisting of (A) 1 to 25 percent by weight based on the weight of A+B+C of at least one elasatomeric polymer which has a glass temperature, Tg, of less than 0° C. and consists of: (1) 50 to 99.9 percent by weight of a least one alkyl acrylate having 1 to 8 carbon atoms in the alkyl radical (2) 0.1 to 5 percent by weight of a polyfunctional monomer having a crosslinking effect (3) 20 to 30 percent by weight of butadiene; (B) 5 to 40 percent by weight based on the weight of A+B+C of a shell grafted to the elastomeric polymer A, the grat polymer having an average particle size of 200 to 750 nm (d 50 --value of the integral mass distribution) wherein the polymerization of the grafted shell consisting of (B) takes place in two stages with 30 to 70 percent by weight of a monomer (B1) selected from the group consisting of styrene, α-ethylstyrene para-methylstyrene and tertiary butylstyrene in the first stage and 30 to 70 percent by weight of a mixture of the monomer (B1) and a monomer (B2) selected from the group consisting of ethylacrylate and methylacrylate in a weight ratio of 90:10 to 60:40 in the second stage; and (C) 35 to 94 percent by weight based n the weight of A+B+C of a copolymer consisting of a styrene-acrylonitrile copolymer.
Claim 5
Dependent Claim
232 words
A thermoplastic molding material consisting of (A) 1 to 25 percent by weight based on the weight of A+B+C of at least one elasatomeric polymer which has a glass temperature, Tg, of less than 0° C. and consists of: (1) 50 to 99.9 percent by weight of a least one alkyl acrylate having 1 to 8 carbon atoms in the alkyl radical (2) 0.1 to 5 percent by weight of a polyfunctional monomer having a crosslinking effect (3) 20 to 30 percent by weight of butadiene; (B) 5 to 40 percent by weight based on the weight of A+B+C of a shell grafted to the elastomeric polymer A, the grat polymer having an average particle size of 200 to 750 nm (d 50 --value of the integral mass distribution) wherein the polymerization of the grafted shell consisting of (B) takes place in two stages with 30 to 70 percent by weight of a monomer (B1) selected from the group consisting of styrene, α-ethylstyrene para-methylstyrene and tertiary butylstyrene in the first stage and 30 to 70 percent by weight of a mixture of the monomer (B1) and a monomer (B2) selected from the group consisting of ethylacrylate and methylacrylate in a weight ratio of 90:10 to 60:40 in the second stage; and (C) 35 to 94 percent by weight based n the weight of A+B+C of a copolymer consisting of a styrene-acrylonitrile copolymer.
References Cited (Backward Citations)
US4634734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |