US4442264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft rubbers for modifying thermoplastic moulding compositions
Assignee: Bayer AG
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Filing: 1983-05-02
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Granted: 1984-04-10
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Expires: 2003-05-02
Abstract
Abstract This invention relates to graft rubbers obtained by the radical polymerization of one or more vinyl-group-containing monomers in the presence of at least one rubber, the polymerization reaction being carried out in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the following formula (I): ##STR1## in which X=CL or NO 2 Y 1 , Y 2 =H, C 1 -C 10 -alkyl, NO 2 , F, Cl, Br, and to the use of the graft rubbers according to the invention for the production of rubber-modified thermoplastic moulding compositions.
Inventors
- 👤 Karl Zabrocki
- 👤 Alfred Pischtschan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:23
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/02; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A graft rubber obtainable by the radical polymerisation of one or more vinyl-group-containing monomers in the presence of at least one rubber, wherein polymerisation is carried out in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the general formula (I) ##STR4## in which X represents Cl or NO 2 ; Y 1 and Y 2 , which may be the same or different, represent H, C 1 -C 10 -alkyl, NO 2 , F, Cl or Br.
Claim 2
Dependent Claim
90 words
A graft rubber obtainable by the radical polymerisation of one or more vinyl-group-containing monomers in the presence of at least one rubber, wherein polymerisation is carried out in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the general formula (I) ##STR4## in which X represents Cl or NO 2 ; Y 1 and Y 2 , which may be the same or different, represent H, C 1 -C 10 -alkyl, NO 2 , F, Cl or Br.
Claim 3
Dependent Claim
32 words
A graft rubber according to claim 1, wherein the one or more vinyl-group-contaning monomers are selected from styrene and alkylstyrenes, acrylonitrile, methacrylonitrile, acrylic and methacrylic acid esters and mixtures of these monomers.
Claim 4
Dependent Claim
31 words
A graft rubber according to claim 1, wherein the rubber is a polybutadiene, styrene-butadiene copolymer or acrylate rubber, a graft rubber according to claim 1, wherein the rubber contains C═C-double bonds.
Claim 5
Dependent Claim
16 words
A graft rubber according to claim 1, wherein the compound of general formula (I) is β-nitrostyrene.
Claim 6
Dependent Claim
90 words
A process for preparing a graft rubber which comprises subjecting to radical polymerisation one or more vinyl-group-containing monomers in the presence of at least one rubber and in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the general formula (I) ##STR5## in which X represents Cl or NO 2 ; Y 1 and Y 2 , which may be the same or different, represent H, C 1 -C 10 -alkyl, NO 2 , F, Cl or Br.
Claim 7
Dependent Claim
90 words
A process for preparing a graft rubber which comprises subjecting to radical polymerisation one or more vinyl-group-containing monomers in the presence of at least one rubber and in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the general formula (I) ##STR5## in which X represents Cl or NO 2 ; Y 1 and Y 2 , which may be the same or different, represent H, C 1 -C 10 -alkyl, NO 2 , F, Cl or Br.
Claim 8
Dependent Claim
31 words
A process according to claim 5, wherein the one or more vinyl-group-containing monomers are selected from styrene and alkylstyrenes, acrylonitrile, methacrylonitrile, acrylic and methacrylic acid esters and mixtures of these monomers.
Claim 9
Dependent Claim
57 words
A process according to claim 5, wherein the rubber is a polybutadiene, styrene-butadiene copolymer or acrylate rubber, a process according to claim 5, wherein the rubber contains C═C-double bonds, a process according to claim 5, wherein polymerisation is carried out in emulsion, a process according to claim 5, wherein the compound of general formula (I) is β-nitrostyrene.
Claim 10
Dependent Claim
35 words
A rubber-modified thermoplastic moulding composition comprising from 1 to 80% by weight (based on the final mixture) of a graft rubber according to claim 1 or as prepared by a process according to claim 5.
References Cited (Backward Citations)
US3047534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |