Denture stabilizing zinc and strontium salts of ave/ma copolymer

Claim 2

The unmixed partial zinc or strontium metal salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents a C 1-4 alkyl radical, n is an integer greater than one representing the number of repeated occurrences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salts containing either zinc or strontium cations as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted.

Claim 3

The zinc salt of Claim 1 with R being methyl.

Claim 4

The strontium salt of Claim 1 with R being methyl.

Claim 5

The zinc salt of Claim 1 with R being methyl and with from about 40 to about 50 percent of the total initial carboxyl groups reacted.

Claim 6

A denture-stabilizing composition having as a stabilizing component an effective adhesive amount of an unmixed partial zinc or strontium metal salt of a lower alkyl vinyl ether-maleic acid copolymer consist­ing essentially of the repeated structural unit: wherein R represents a C 1-4 alkyl radical, n is an integer greater than one representing the number of repeated occurrences of said structural unit in a mole­cule of said copolymer and n is large enough to charac­terize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being deter­mined in methyl ethyl ketone at 25°C, said partial salts containing either zinc or strontium cations as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted.

Claim 7

A denture-stabilizing composition having as a stabilizing component an effective adhesive amount of an unmixed partial zinc or strontium metal salt of a lower alkyl vinyl ether-maleic acid copolymer consist­ing essentially of the repeated structural unit: wherein R represents a C 1-4 alkyl radical, n is an integer greater than one representing the number of repeated occurrences of said structural unit in a mole­cule of said copolymer and n is large enough to charac­terize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being deter­mined in methyl ethyl ketone at 25°C, said partial salts containing either zinc or strontium cations as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted.

Claim 8

The composition of Claim 5 wherein said salt is the zinc salt with R being methyl.

Claim 9

The composition of Claim 5 wherein said salt is the strontium salt with R being methyl.

Claim 10

A denture-stabilizing composition with an effective adhesive amount of at least two den­ture adhesive components comprising as one of said components from about 5 to about 35 percent, based on the total weight of the composition, of a water-in­soluble water-sensitized polymeric material being further characterized by a particle size of at least minus 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centi­meter, and a pH between 3 and 4.7, the pH being deter­mined on a one percent by weight dispersion of said material in water; said material consisting essentially of an unmixed partial zinc salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing zinc cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said cation; said partial zinc copolymer salt being present in an amount, based on the total weight of the composition, sufficient to provide from about 1.0 to about 2.4 per­cent of elemental zinc.

Claim 11

A denture-stabilizing composition with an effective adhesive amount of at least two den­ture adhesive components comprising as one of said components from about 5 to about 35 percent, based on the total weight of the composition, of a water-in­soluble water-sensitized polymeric material being further characterized by a particle size of at least minus 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centi­meter, and a pH between 3 and 4.7, the pH being deter­mined on a one percent by weight dispersion of said material in water; said material consisting essentially of an unmixed partial zinc salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing zinc cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said cation; said partial zinc copolymer salt being present in an amount, based on the total weight of the composition, sufficient to provide from about 1.0 to about 2.4 per­cent of elemental zinc.

Claim 12

The composition of Claim 8 wherein, with regard to said unmixed partial zinc copolymer salt, said R is methyl.

Claim 13

The composition of Claim 8 wherein, with regard to said unmixed partial zinc copolymer salt, said R is methyl and from about 40 to about 50 percent of the total initial carboxyl groups are reacted.

Claim 14

The composition of Claim 8 wherein said un­mixed partial salt is the zinc salt, said R is methyl, and said elemental zinc content is from about 1.4 to about 1.9 percent.

Claim 15

A denture-stabilizing composition with an effective adhesive amount of at least two den­ture adhesive components, one of such components being a calcium-sodium mixed partial salt of methyl vinyl ether-maleic anhydride-type copolymer, characterized in that the second component is made from about 5 to about 35 percent, based on the total weight of the composition, of a water-insoluble water-­sensitized polymeric material characterized by a par­ticle size of at least minus 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centimeter, and a pH between 3 and 4.7, the pH being determined on a one percent by weight dispersion of said material in water; said material consisting essentially of an unmixed partial zinc salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing zinc cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said zinc cation; said partial zinc copolymer salt being present in an amount, based on the total weight of the composition, suffi­cient to provide from about 1.0 to about 2.4 percent of elemental zinc.

Claim 16

A denture-stabilizing composition with an effective adhesive amount of at least two den­ture adhesive components, one of such components being a calcium-sodium mixed partial salt of methyl vinyl ether-maleic anhydride-type copolymer, characterized in that the second component is made from about 5 to about 35 percent, based on the total weight of the composition, of a water-insoluble water-­sensitized polymeric material characterized by a par­ticle size of at least minus 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centimeter, and a pH between 3 and 4.7, the pH being determined on a one percent by weight dispersion of said material in water; said material consisting essentially of an unmixed partial zinc salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing zinc cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said zinc cation; said partial zinc copolymer salt being present in an amount, based on the total weight of the composition, suffi­cient to provide from about 1.0 to about 2.4 percent of elemental zinc.

Claim 17

The composition of Claim 12 wherein, with regard to said unmixed partial zinc copolymer salt, said R is methyl.

Claim 18

The composition of Claim 12 wherein, with regard to said unmixed partial zinc copolymer salt, said R is methyl, and from about 40 to about 50 percent of the total initial carboxyl groups are reacted.

Claim 19

The composition of Claim 12 wherein, with regard to said unmixed partial zinc copolymer salt, said R is methyl and said elemental zinc content is from about 1.4 to about 1.9 percent.

Claim 20

16 A denture-stabilizing composition having as a stabilizing component a material comprising at least 25 percent by weight of said denture-stabilizing composi­tion and being a water-insoluble water-sensitized poly­meric material; said material being further characterized by a particle size of at least 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centimeter, and a pH between 3 and 4.7, the pH being determined on a one percent by weight dispersion of said material in water; said material consisting essen­tially of a partial unmixed zinc or strontium metal salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­ rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing a member selected from the group consisting of zinc or strontium cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said cation.

Claim 21

16 A denture-stabilizing composition having as a stabilizing component a material comprising at least 25 percent by weight of said denture-stabilizing composi­tion and being a water-insoluble water-sensitized poly­meric material; said material being further characterized by a particle size of at least 140-mesh U.S.B.S. sieve, by an apparent bulk density greater than 0.5 gram per cubic centimeter, and a pH between 3 and 4.7, the pH being determined on a one percent by weight dispersion of said material in water; said material consisting essen­tially of a partial unmixed zinc or strontium metal salt of a lower alkyl vinyl ether-maleic acid copolymer consisting essentially of the repeated structural unit: wherein R represents C 1-4 alkyl, n is an integer great­er than one representing the number of repeated occur­ rences of said structural unit in a molecule of said copolymer and n is large enough to characterize said copolymer as having a specific viscosity larger than 1.2, the specific viscosity being determined in methyl ethyl ketone at 25°C, said partial salt containing a member selected from the group consisting of zinc or strontium cation as the sole cationic salt function, with from about 10 to about 60 percent of the total initial carboxyl groups reacted with said cation.

Claim 22

The composition of Claim 16 wherein, with regard to said unmixed partial copolymer salt, said R is methyl.

Claim 23

The composition of Claim 16 wherein, with regard to said unmixed partial copolymer salt, said R is methyl and from about 40 to about 50 percent of the total initial carboxyl groups are reacted.

Claim 24

The composition of Claim 16 having, as an additional adhesive component, a calcium-sodium mixed partial salt of methyl vinyl ether-maleic anhydride-­type copolymer.