Polymer

Claim 2

Product in the form of particles, which particles have been coated with a layer of polymer having pH dependent solubility characteristics in aqueous media, formed by the polymerization of (a) methylmethacrylate, (b) at least one monomer selected from the group consisting of a monomer of the general formula ##STR11## wherein R is selected from the group consisting of hydrogen and methyl, X is selected from the group consisting of --CH 2 , and --O, and n is an integer of from 1-4, and a monomer of the general formula ##STR12## wherein R is selected from the group consisting of hydrogen and methyl, R 1 and R 2 are each selected from the group consisting of hydrogen, methyl, ethyl, propyl, isopropyl, isobutyl, t-butyl, and n-butyl, whereby R 1 and R 2 are not both hydrogen, and m is an integer of from 1-4; and wherein the monomer according to formula I, when present, is 30-50 mol-% of the amount of monomers charged; and wherein the monomer of formula II, when present, is 20-30 mol-% of the amount of monomers charged; and (c) at least one monomer of the general formula ##STR13## wherein R 3 is a straight or branched alkyl group having 4-18C, and R 4 is hydrogen or methyl, and wherein the monomer according to formula III is 0.5-6.0 mol-% of the amount of monomers charged; and wherein the polymer has pH dependent solubility such that the compound is essentially water insoluble above pH=5, but essentially water permeable at pH=3; and wherein the nitrogen content of the polymer is 2.5-3.3%.

Claim 3

Product according to claim 1 wherein said monomer III includes butylmethacrylate or stearylmethacrylate.

Claim 4

Method for the administration of products of the type of nutritional agents and therapeutic agents to the rennet stomach of a ruminant without causing an attack by the microorganisms of the rumen, whereby the product is provided with a polymer layer, which with regard to its solubility characteristics is pH dependent so that it is substantially soluble resistant at pH exceeding pH=5 and substantially soluble and/or provides for release of the coated agent at pH below pH 3, characterized in that the product has been coated with a polymer between (a) methylmethacrylate, (b) at least one monomer selected from the group consisting of a monomer of the general formula ##STR14## wherein R is selected from the group consisting of hydrogen and methyl, X is selected from the group consisting of --CH 2 , and --O, and n is an integer of from 1-4, and monomer of the general formula ##STR15## wherein R is selected from the group consisting of hydrogen and methyl, R 1 and R 2 are each selected from the group consisting of hydrogen, methyl, ethyl, propyl, isopropyl, isobutyl, t-butyl, and n-butyl, whereby R 1 and R 2 are not both hydrogen, and m is an integer of from 1-4; and wherein the monomer according to formula I, when present, is 30-50 mol-% of the amount of monomers charged; and wherein the monomer of formula II, when present, is 20-30 mol-% of the amount of monomers charged; and (c) at least one monomer of the general formula ##STR16## wherein R 3 is a straight or branched alkyl group having 4-18C, and R 4 is hydrogen or methyl, and wherein the monomer according to formula III is 0.5-6.0 mol-% of the amount of monomer charged; and wherein the polymer has pH dependent solubility such that the compound is essentially water insoluble above pH=5, but essentially water permeable at pH=3; and wherein the nitrogen content of the polymer is 2.5-3.3%.

Claim 5

Method for the administration of products of the type of nutritional agents and therapeutic agents to the rennet stomach of a ruminant without causing an attack by the microorganisms of the rumen, whereby the product is provided with a polymer layer, which with regard to its solubility characteristics is pH dependent so that it is substantially soluble resistant at pH exceeding pH=5 and substantially soluble and/or provides for release of the coated agent at pH below pH 3, characterized in that the product has been coated with a polymer between (a) methylmethacrylate, (b) at least one monomer selected from the group consisting of a monomer of the general formula ##STR14## wherein R is selected from the group consisting of hydrogen and methyl, X is selected from the group consisting of --CH 2 , and --O, and n is an integer of from 1-4, and monomer of the general formula ##STR15## wherein R is selected from the group consisting of hydrogen and methyl, R 1 and R 2 are each selected from the group consisting of hydrogen, methyl, ethyl, propyl, isopropyl, isobutyl, t-butyl, and n-butyl, whereby R 1 and R 2 are not both hydrogen, and m is an integer of from 1-4; and wherein the monomer according to formula I, when present, is 30-50 mol-% of the amount of monomers charged; and wherein the monomer of formula II, when present, is 20-30 mol-% of the amount of monomers charged; and (c) at least one monomer of the general formula ##STR16## wherein R 3 is a straight or branched alkyl group having 4-18C, and R 4 is hydrogen or methyl, and wherein the monomer according to formula III is 0.5-6.0 mol-% of the amount of monomer charged; and wherein the polymer has pH dependent solubility such that the compound is essentially water insoluble above pH=5, but essentially water permeable at pH=3; and wherein the nitrogen content of the polymer is 2.5-3.3%.

Claim 6

A polymer according to claim 3 wherein said monomer III includes butylmethacrylate or stearylmethacrylate.

Claim 7

Product according to claims 1 or 2, characterized in that it is a feedstuff for ruminants comprising a particle shaped, sugar-containing material.

Claim 8

Product according to claims 1 or 2, characterized in that it is a feedstuff for ruminants comprising a particle shaped, protein-containing material.

Claim 9

Product according to claims 1 or 2, characterized in that it is a feedstuff for ruminants comprising a particle shaped, amino acid containing material.

Claim 10

Product according to claims 1 or 2, characterized in that it is a feedstuff for ruminants comprising a particle shaped, unsaturated fat containing material.

Claim 11

Product according to claims 1 or 2, characterized in that it is a food stuff comprising a particle shaped, nutrient agent containing material.

Claim 12

Product according to claims 1 or 2, characterized in that it is a therapeutically active preparation comprising a particle shaped, therapeutic agent containing material.

Claim 13

Product according to one of claims 1 or 2 or 5-10, characterized in that the particles have been coated with a polymer between (a) methylmethacrylate (b) stearylmethacrylate, and (c) 2-(4-morpholino)ethylacrylate.

Claim 14

Product according to one of claims 1 or 2 or 5-10, characterized in that the particles have been coated with a polymer between (a) methylmethacrylate (b) stearylmethacrylate, and (c) 2-(N',N'-dimethylamino) ethylmethacrylate.

Claim 15

Product according to claim 12, characterized in that the polymer further comprises butylmethacrylate.

Claim 16

Product according to one of claims 1 or 2 or 5-10, characterized in that the particles present have a size of 0.1-15 mm and a density of about 1.

Claim 17

Product according to one of claims 1 or 2 or 5-10, characterized in that the particles have been coated with the polymer in an amount of at least 1.0 g per 100 g of particles.