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| Kaolin clay slurries of reduced viscosity |
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Selenium-containing polymers and process for producing same
| Details |
Inventors: Kato, Masao;
Assignee: Director-General of the Agency of Industrial Science and Technology (Tokyo, JA)
Primary Examiner: Hamrock; William F.
Assistant Examiner:
Attorney, Agent or Firm: Brisebois & Kruger
A polymer or copolymer characterized in that it contains a monomer unit of he general formula: ##STR1## wherein R stands for a member selected from the group consisting of hydrogen atom and a phenyl group and R.sub.1 for a member selected from the group consisting of hydrogen atom and methyl group. This polymer or copolymer is produced, for example, by diazotizing a polymer or copolymer containing a monomer unit of the general formula: ##STR2## wherein R.sub.1 has the same meaning as given above, TO FORM A DIAZOTIZED POLYMER OR COPOLYMER CONTAINING A MONOMER UNIT OF THE GENERAL FORMULA: ##STR3## wherein R.sub.1 has the same meaning as given above and X stand for an anion, and then either reacting the diazotized polymer or copolymer with an alkali metal selenocyanate and subjecting the reaction product to an alkali treatment or reacting the diazotized polymer or copolymer with an alkali metal salt of a selenophenol compound. |
|
DETAILED DESCRIPTION OF THE INVENTION The above mentioned various objects of the present invention can be attained by a selenium-containing polymer composed of a recurring unit of the general formula: ##STR4## wherein R stands for a member selected from the group consisting of hydrogen atom and a phenyl group, R.
sub.
1, R.
sub.
2, R.
sub.
3 and R.
sub.
4 each for a member selected from the group consisting of hydrogen atom and methyl group, R.
sub.
5 for a member selected from the group consisting of hydrogen atom, methyl group and a phenyl group and n is zero or an integer of at least 1.
The polymer composed of the recurring unit of the general formula (I) includes as specific embodiments thereof a polymer composed of a recurring unit of the general formula: ##STR5## wherein R.
sub.
1, R.
sub.
2, R.
sub.
3, R.
sub.
4, R.
sub.
5 and n have the same meanings as given above, and a polymer composed of a recurring unit of the general formula: ##STR6## wherein R.
sub.
1, R.
sub.
2, R.
sub.
3, R.
sub.
4, R.
sub.
5 and n have the same meanings as given above.
The phenyl group in the above general formulas (II) and (III) may be substituted, if desired, by one or more inert substituents.
The polymer composed of the recurring unit of the general formula (II) is prepared, for example, by diazotizing a polymer composed of a recurring unit of the general formula: ##STR7## wherein R.
sub.
1, R.
sub.
2, R.
sub.
3, R.
sub.
4, R.
sub.
5 and n have the same meanings as given above, according a usual method to form a diazotized polymer composed of a recurring unit of the general formula: ##STR8## wherein R.
sub.
1, R.
sub.
2, R.
sub.
3, R.
sub.
4, R.
sub.
5 and n have the same meanings as given above and X is an amion, reacting the diazotized polymer with an alkali metal selenocyanate and thereafter treating the reaction product with an alkali.
The polymer composed of the recurring unit of the general formula (V) is prepared, for example, by reacting the diazotized polymer composed of the recurring unit of the general formula (V) with a selenophenol compound of the general formula: ##STR9## wherein Me stands for an alkali metal
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