US5266645A
Expired / Lapsed
US
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Acrylate-methacrylate graft polymerizate
Assignee: Roehm GmbH Darmstadt
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Filing: 1991-12-19
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Granted: 1993-11-30
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Expires: 2011-12-19
Abstract
Abstract Graft polymerizates on the basis of acrylates and methacrylates, comprise one or more graft monomers of the formula (I) ##STR1## where R 1 stands for a hydrocarbon group having 2-24 carbon atoms and a base polymer of which 55-100 wt. % is synthesized from one or more monomers of the formula (II) ##STR2## wherein R 2 stands for a hydrocarbon group having 2-24 carbon atoms, provided that the groups R 1 and R 2 exhibit Van-der-Waals volumes which differ by less than 30%, and that at least 10 wt. % based on the total monomers of formula (I) are grafted on the base polymer.
Inventors
- 👤 Werner Siol
- 👤 Wolfgang Klesse
- 👤 Klaus Koralewsky
- 👤 Ulrich Terbrack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:37
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A graft polymerizate comprising: graft monomers of the formula (I) CH.sub.2 =C(CH.sub.3)--COOR.sub.1 (I) wherein R 1 represents a hydrocarbon group having 2-24 carbon atoms; or a mixture thereof and a base polymer comprising 55-100 wt. % of one or more monomers of the formula (II) CH.sub.2 =CH--COOR.sub.2 (II) wherein R 2 represents a hydrocarbon group having 2-24 carbon atoms; provided that said groups R 1 and R 2 exhibit Van-der-Waals volumes which differ by less than 30% and said graft monomers are polymerized so that at least 10 wt. %, based on the total monomers of formula (I), are grafted onto said base polymer.
Claim 2
Dependent Claim
104 words
A graft polymerizate comprising: graft monomers of the formula (I) CH.sub.2 =C(CH.sub.3)--COOR.sub.1 (I) wherein R 1 represents a hydrocarbon group having 2-24 carbon atoms; or a mixture thereof and a base polymer comprising 55-100 wt. % of one or more monomers of the formula (II) CH.sub.2 =CH--COOR.sub.2 (II) wherein R 2 represents a hydrocarbon group having 2-24 carbon atoms; provided that said groups R 1 and R 2 exhibit Van-der-Waals volumes which differ by less than 30% and said graft monomers are polymerized so that at least 10 wt. %, based on the total monomers of formula (I), are grafted onto said base polymer.
Claim 3
Dependent Claim
36 words
The graft polymerizate as claimed in claim 1, wherein said base polymer further comprises 0.1 to 45 wt. % of one or more monomers different from said monomers of the formula (II) and copolymerizable with acrylates.
Claim 4
Dependent Claim
26 words
The graft polymerizate as claimed in claim 1, wherein said monomers comprising said base polymer are in 10:90 to 90:10 weight proportion to said graft monomers.
Claim 5
Dependent Claim
26 words
The graft polymerizate as claimed in claim 1, wherein said base polymer has a molecular weight in the range of from 200,000 to 10 9 Daltons.
Claim 6
Dependent Claim
23 words
The graft polymerizate as claimed in claim 1, wherein said base polymer comprises 85-100 wt. % of said monomers of the formula (II).
Claim 7
Dependent Claim
17 words
The graft polymerizate as claimed in claim 1, wherein R 1 and R 2 each represent ethyl.
Claim 8
Dependent Claim
18 words
The graft polymerizate as claimed in claim 1, wherein R 1 represents isobutyl and R 2 represents n-butyl.
Claim 9
Dependent Claim
14 words
The graft polymerizate as claimed in claim 1 which is prepared by emulsion polymerization.
Claim 10
Dependent Claim
140 words
A process for the preparation of a graft polymerizate as claimed in claim 1, said process comprising: forming an aqueous emulsion of one or more monomers of the formula (II) CH.sub.2 =CH--COOR.sub.2 (II) wherein R 2 represents a hydrocarbon group having 2-24 carbon atoms; polymerizing said so-formed aqueous emulsion by means of a radical initiator to form said base polymer; adding one or more graft monomers of the formula (I) CH.sub.2 =C(CH.sub.3)--COOR.sub.1 (I) wherein R 1 represents a hydrocarbon group having 2-24 carbon atoms to said so-formed base polymer, and polymerizing said graft monomers in the presence of said base polymer so that at least 10 wt. %, based on the total monomers of formula (I), are grafted onto said base polymer; provided that said groups R 1 and R 2 exhibit Van-der-Waals volumes which differ by less than 30%.
Claim 11
Dependent Claim
51 words
The process as claimed in claim 9, wherein said polymerization of said aqueous emulsion cf said monomers cf the formula (II) is conducted as a batch polymerization; and said polymerization of said 9raft monomers cf the formula (I) in the presence of said base polymer is conducted as a feed polymerization.
Claim 12
Dependent Claim
121 words
A process for the preparation of a graft polymerizate as claimed in claim 1 said process comprising: polymerizing in an extruder graft monomers of the formula (I) CH.sub.2 =C (CH.sub.3)--COOR.sub.1 wherein R 1 represents a hydrocarbon group having 2-24 carbon atoms or a mixture thereof and a base polymer comprising 55-100 wt. % of one or more monomers of the formula (II) CH.sub.2 =CH--COOR.sub.2 (II) wherein R 2 represents a hydrocarbon group having 2-24 carbon atoms; provided that said groups R 1 and R 2 exhibit Van-der-Waals volumes which differ by less than 30% and said graft monomers are polymerized sc that at least 10 wt %, based on the total monomers of formula (I), are grafted onto said base polymer.
Claim 13
Dependent Claim
14 words
An aqueous dispersion of a graft polymerizate prepared by the process of claim 9.
Claim 14
Dependent Claim
13 words
A moulded body prepared from the graft polymerizate s claimed in claim 1.
Claim 15
Dependent Claim
17 words
A cast foil prepared from an aqueous dispersion of a graft polymerizate as claimed in claim 12.
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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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |