Thermoplastic dental filling composition

Claim 2

A thermoplastic dental filling composition comprising from 3 to 50% by weight of a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, and from 50 to 97% by weight of an insoluble or sparingly soluble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 3

A thermoplastic dental filling composition as claimed in claim 1, wherein the amount of said ethylene/vinyl acetate copolymer resin in said polymer component is from 5 to 100 parts by weight based on 100 parts by weight of said trans-1,4-polyisoprene.

Claim 4

A thermoplastic dental filling composition as claimed in claim 1, wherein said inorganic filler is selected from the group consisting of a silicon compound, an alkaline earth metal sulfate, an alkaline earth metal carbonate, a polyvalent metal silicate, a polyvalent metal oxide, a polyvalent metal hydroxide, a clay mineral, and lithopone.

Claim 5

A thermosplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, and (b) at least one thermoplastic resin selected from the group consisting of polystyrene, a styrene-based copolymer resin, low molecular weight polyethylene, low molecular weight polypropylene, an olefin-based resin, a rosin-based resin, a terpene-based resin, an alicyclic saturated hydrocarbon resin, and a coumarone resin; and from 50 to 97% by weight of an insoluble or sparingly soluble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 6

A thermosplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, and (b) at least one thermoplastic resin selected from the group consisting of polystyrene, a styrene-based copolymer resin, low molecular weight polyethylene, low molecular weight polypropylene, an olefin-based resin, a rosin-based resin, a terpene-based resin, an alicyclic saturated hydrocarbon resin, and a coumarone resin; and from 50 to 97% by weight of an insoluble or sparingly soluble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 7

A thermoplastic dental filling composition as claimed in claim 4, wherein the amount of said ethylene/vinyl acetate copolymer resin in said polymer component is from 5 to 100 parts by weight based on 100 parts by weight of said trans-1,4-polyisoprene.

Claim 8

A thermoplastic dental filling composition as claimed in claim 4, wherein said inorganic filler is selected from the group consisting of a silicon compound, an alkaline earth metal sulfate, an alkaline earth metal carbonate, a polyvalent metal silicate, a polyvalent metal oxide, a polyvalent metal hydroxide, a clay mineral, and lithopone.

Claim 9

A thermoplastic dental filling composition as claimed in claim 4, wherein said thermoplastic resin has a softening point of from 60° to 110° C.

Claim 10

A thermoplastic dental filling composition as claimed in claim 4, wherein said thermoplastic resin is added in an amount of up to 8% by weight with respect to said thermoplastic dental filling composition.

Claim 11

A thermoplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, and (b) at least one wax-like component having a melting point of 70° C. or less, selected from the group consisting of a natural wax, a synthetic wax, a higher fatty acid, and a higher alcohol; and from 50 to 97% by weight of an insoluble or sparingly soluble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 12

A thermoplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, and (b) at least one wax-like component having a melting point of 70° C. or less, selected from the group consisting of a natural wax, a synthetic wax, a higher fatty acid, and a higher alcohol; and from 50 to 97% by weight of an insoluble or sparingly soluble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 13

A thermoplastic dental filling composition as claimed in claim 9, wherein the amount of said ethylene/vinyl acetate copolymer resin in said polymer component is from 5 to 100 parts by weight based on 100 parts by weight of said trans-1,4-polyisoprene.

Claim 14

A thermoplastic dental filling composition as claimed in claim 9, wherein said inorganic filler has a solubility of 0.5 g or less in 100 ml of water at 20° C.

Claim 15

A thermoplastic dental filling composition as claimed in claim 9, wherein said inorganic filler is selected from the group consisting of a silicon compound, an alkaline earth metal sulfate, an alkaline earth metal carbonate, a polyvalent metal silicate, a polyvalent metal oxide, a polyvalent metal hydroxide, a clay mineral, and lithopone.

Claim 16

A thermoplastic dental filling composition as claimed in claim 9, wherein said wax-like component has a melting point of from 37° to 70° C.

Claim 17

A thermoplastic dental filling composition as claimed in claim 9, wherein said wax-like component is added in an amount of up to 20% by weight with respect to said thermoplastic dental filling composition.

Claim 18

A thermoplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, (b) at least one thermoplastic resin selected from the group consisting of polystyrene, a styrene-based copolymer resin, low molecular weight polyethylene, low molecular weight polypropylene, an olefin-based resin, a rosin-based resin, a terpene-based resin, an alicyclic saturated hydrocarbon resin, and a coumarone resin, and (c) at least one wax-like component having a melting point of 70° C. or less, selected from the group consisting of a natural wax, a synthetic wax, a higher fatty acid, and a higher alcohol; and from 50 to 97% by weight of an insoluble or sparingly souble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 19

A thermoplastic dental filling composition comprising from 3 to 50% by weight of an organic component comprising (a) a polymer component comprising trans-1,4-polyisoprene and an ethylene/vinyl acetate copolymer resin, said copolymer resin comprising from 15 to 40 wt. % vinyl acetate and having a melt index substantially from 10 to 400, (b) at least one thermoplastic resin selected from the group consisting of polystyrene, a styrene-based copolymer resin, low molecular weight polyethylene, low molecular weight polypropylene, an olefin-based resin, a rosin-based resin, a terpene-based resin, an alicyclic saturated hydrocarbon resin, and a coumarone resin, and (c) at least one wax-like component having a melting point of 70° C. or less, selected from the group consisting of a natural wax, a synthetic wax, a higher fatty acid, and a higher alcohol; and from 50 to 97% by weight of an insoluble or sparingly souble inorganic filler, said filler having a solubility of 0.5 g or less in 100 ml water at 20° C.

Claim 20

A thermoplastic dental filling composition as claimed in claim 15, wherein the amount of said ethylene/vinyl acetate copolymer resin in said polymer component is from 5 to 100 parts by weight based on 100 parts by weight of said trans-1,4-polyisoprene.

Claim 21

A thermoplastic dental filling composition as claimed in claim 15, wherein said inorganic filler is selected from the group consisting of a silicon compound, an alkaline earth metal sulfate, as alkaline earth metal carbonate, a polyvalent metal silicate, a polyvalent metal oxide, a polyvalent metal hydroxide, a clay mineral, and lithopone.

Claim 22

A thermoplastic dental filling composition as claimed in claim 15, wherein said thermoplastic resin has a softening point of from 60° to 110° C.

Claim 23

A thermoplastic dental filling composition as claimed in claim 15, wherein said thermoplastic resin is added in an amount of up to 8% by weight with respect to said thermoplastic dental filling composition.

Claim 24

A thermoplastic dental filling composition as claimed in claim 15, wherein said wax-like component has a melting point of from 37° to 70° C.

Claim 25

A thermoplastic dental filling composition as claimed in claim 15, wherein said wax-like component is added in an amount of up to 20% by weight with respect to said thermoplastic dental filling composition.