Claims
- 1. A crosslinked polyacrylamide containing silyl groups which is prepared by polymerising a silylated acrylic acid amide, of formula Ia or Ib ##STR15## wherein X.sub.1, X.sub.2 and X.sub.3 independently of one another represent hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 to 4 carbon atoms, cyclohexyl, phenyl, phenoxy or benzyl, and
- R.sub.1 is hydrogen or alkyl having 1 to 4 carbon atoms, in the presence of from about 5 to 250 mole%, based on the silylated acrylic acid amide, of a crosslinking agent of formula II ##STR16## wherein p represents the number 2 or 3,
- Q.sub.1 represents hydrogen or methyl,
- Q, when p = 2, represents --SO.sub.2 --, phenylene, ##STR17## with 2 to 4 carbon atoms in the alkylene moiety, ##STR18## or, when X.sub.1, X.sub.2 and X.sub.3 are each methyl, also represents ##STR19## or, when p = 3, Q represents the group of the formula ##STR20## the polymerisation being carried out at a temperature between about 20.degree. and 120.degree. C.
- 2. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein X.sub.1, X.sub.2 and X.sub.3 independently of one another are methyl, ethyl or phenyl and R.sub.1 is hydrogen, methyl or ethyl.
- 3. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein X.sub.1, X.sub.2 and X.sub.3 each represent methyl and R.sub.1 represents hydrogen or methyl.
- 4. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein the crosslinking agent of formula II is selected from the group consisting of ethylene glycol-dimethacrylate, 1,4-butanediol-diacrylate, 1,4-butanediol-dimethacrylate, N,N'-methylene-bis-acrylamide, and, if X.sub.1, X.sub.2 and X.sub.3 are each methyl, N,N'-bis-trimethylsilyl-N,N'-methylene-bis-acrylamide.
- 5. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, which is prepared by polymerising bis-trimethylsilyl-acrylic acid amide in the presence of ethylene glycol-dimethacrylate, 1,4-butanediol-diacrylate or N,N'-bis-trimethylsilyl-N,N'-methylene-bis-acrylamide.
- 6. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein the polymerisation is carried out in the presence of an inert carrier material.
- 7. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein the polymerisation is carried out in the presence of a radical initiator.
- 8. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein the polymerisation is carried out in an inert aprotic organic solvent.
- 9. A crosslinked polyacrylamide containing silyl groups as claimed in claim 1, wherein the polymerisation is carried out in anhydrous benzene, toluene, cyclohexane or dioxane.
Priority Claims (1)
Number |
Date |
Country |
Kind |
015731/72 |
Oct 1972 |
CHX |
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Parent Case Info
This application is a continuation of application, Ser. No. 610,203, filed Sept. 4, 1975, now abandoned, which in turn is a continuation-in-part application of application, Ser. No. 403,359, filed Oct. 4, 1973, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3247171 |
Walker |
Apr 1966 |
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Non-Patent Literature Citations (1)
Entry |
Steiner, Hans, Thesis No. 4569, 1970, pp. 21-28. |
Continuations (1)
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Number |
Date |
Country |
Parent |
610203 |
Sep 1975 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
403359 |
Oct 1973 |
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