Non-bleeding vinylidene chloride copolymer coatings

Claim 2

A VINYLIDENE CHLORIDE COPOLYMER EMULSION COMPOSITION SUITABLE FOR USE AS AN AQUEOUS BASED COATING VEHICLE FOR INHIBITING BLEEDING WHEN WOODS OF A HIGH PHENOLIC WOOD CONTENT ARE COATED THEREWITH, SAID EMULSION COMPOSITION COMPRISING: A. A VINYLIDENE CHLORIDE COPOLYMER CONTAINING: A. ABOUT 40% TO ABOUT 80% BY WEIGHT VINYLIDENE CHLORIDE, B. ABOUT 20% TO 60% BY WEIGHT OF AN ALKYL ESTER OF AN ALPHA, BETA-ETHYLENICALLY UNSATURATED ACID WHEREIN THE ALKYL ESTER GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS, AND C. ABOUT 0.5 TO ABOUT 3% BY WEIGHT OF AT LEAST ONE ALPHA, BETA-ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID, AN ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AN ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID ANHYDRIDE, ACRYLAMIDE, METHACRYLAMIDE AND N-SUBSTITUTED ACRYLAMIDES, B. AN ORGANIC MONOCARBOXYLIC ACID IN AN AMOUNT RANGING FROM AT LEAST 3 PARTS BY WEIGHT TO ABOUT PARTS FOR EACH 100 PARTS BY WEIGHT VINYLIDENE CHLORIDE COPOLYMER DRY SOLIDS, AND C. AN ORGANIC ACID SALT BUFFERING AGENT IN AN AMOUNT SUFFICIENT TO BUFFER THE VINYLIDENE CHLORIDE COPOLYMER EMULSION COMPOSITION TO A PH OF ABOUT 3.0 TO ABOUT 6.0.

Claim 3

The emulsion composition of claim 1 wherein the copolymer has a glass transition temperature ranging from about 273*K. to 293*K.

Claim 4

The emulsion composition according to claim 2 wherein the organic monocarboxylic is an alkanoic containing from 1 to 4 carbon atoms inclusive.

Claim 5

The composition according to claim 3 wherein the acid is acetic acid and the buffering agent is an Acetate salt in an amount sufficient to buffer the emulsion to a pH of about 3.5 to about 5.0.

Claim 6

The composition according to claim 4 wherein the acetic acid ranges from about 4.5 to about 8.5 parts by weight.

Claim 7

The composition according to claim 3 wherein the buffering agent is an alkanoic acid salt containing from 2 to 4 carbon atoms inclusive and cationic moiety is at least one member selected from the group of an alkali metal salt and an ammonium.

Claim 8

The composition according to claim 6 wherein the buffering agent is an acetate salt and the organic acid is acetic acid in an amount ranging from at least 4.0 parts by weight to about 6 parts by weight for each 100 parts by weight vinylidene copolymer solids and the weight ratio of acetic acid to acetate salt ranges from about 1:1 to about 3:2.

Claim 9

The composition according to claim 7 wherein the principal copolymerized monomer on a weight basis is vinylidene chloride and the principal alkyl ester of an alpha, beta-ethylenically unsaturated acid is butyl acrylate.

Claim 10

The composition according to claim 8 wherein the glass transition temperature of the copolymer ranges from about 278*K. to about 288*K.

Claim 11

The composition according to claim 9 wherein the vinylidene chloride copolymer has copolymerized therewith from about 0.75% to 1.25% by weight itaconic acid.

Claim 12

The composition according to claim 10 wherein the vinylidene chloride copolymer has copolymerized therewith from about 0.4 to about 0.6% by weight acrylamide.

Claim 13

The composition according to claim 7 wherein the acetate salt is sodium acetate.

Claim 14

The composition according to claim 1 wherein the organic acid is a lower alkyl monocarboxylic acid having from 2 to 4 carbon atoms inclusive in an amount ranging from about 4.5 to about 6.0 parts by weight and the salt is an alkali metal salt of a lower alkyl monocarboxylic acid in an amount ranging from about 4.5 to about 6.0 parts by weight.

Claim 15

The composition according to claim 13 wherein the copolymerized vinylidene chloride content of the copolymer is between about 45% to about 55% by weight and the copolymer has a glass transition temperature of about 278*K. to about 293*K.

Claim 16

The composition according to claim 14 wherein the copolymer consists essentially of copolymerized vinylidene chloride, butyl acrylate, methyl acrylate, acrylamide and itaconic acid.

Claim 17

In a water paint comprising pigments, a paint vehicle and other paint additives as required, the improvement which comprises as the principal paint vehicle solids vinylidene chloride copolymer emulsion composition with the water paint being adapted to retard surface staining of phenolic-containing wood when coated therewith, said vinylidene chloride copolymer vehicle solids comprising: A. vinylidene chloride copolymer containing: a. about 40% to 80% by weight vinylidene chloride, b. about 20% to 60% by weight of an alkyl ester of an alpha, beta-ethylenically unsaturated acid wherein the alkyl ester group containing from 1 to 8 carbon atoms, and c. about 0.5 to about 3% by weight of at least one alpha, beta-ethylenically unsaturated monomer selected from the group consisting of an ethylenically unsaturated monocarboxylic acid, an ethylenically unsaturated dicarboxylic acid, an ethylenically unsaturated dicarboxylic acid anhydride, acrylamide, methacrylamide and N-substituted acrylamides, B. an organic monocarboxylic carboxylic acid in an amount ranging from at least 3 parts by weight to about 10 parts for each 100 parts by weight vinylidene chloride copolymer dry solids, and C. an organic acid salt buffer in an amount ranging from about 3 to about 10 parts by weight for each 100 parts by weight vinylidene chloride copolymer dry solids, Said water paint composition being further characterized as having a pH within the range of about 6.0 to 8.0.

Claim 18

In a water paint comprising pigments, a paint vehicle and other paint additives as required, the improvement which comprises as the principal paint vehicle solids vinylidene chloride copolymer emulsion composition with the water paint being adapted to retard surface staining of phenolic-containing wood when coated therewith, said vinylidene chloride copolymer vehicle solids comprising: A. vinylidene chloride copolymer containing: a. about 40% to 80% by weight vinylidene chloride, b. about 20% to 60% by weight of an alkyl ester of an alpha, beta-ethylenically unsaturated acid wherein the alkyl ester group containing from 1 to 8 carbon atoms, and c. about 0.5 to about 3% by weight of at least one alpha, beta-ethylenically unsaturated monomer selected from the group consisting of an ethylenically unsaturated monocarboxylic acid, an ethylenically unsaturated dicarboxylic acid, an ethylenically unsaturated dicarboxylic acid anhydride, acrylamide, methacrylamide and N-substituted acrylamides, B. an organic monocarboxylic carboxylic acid in an amount ranging from at least 3 parts by weight to about 10 parts for each 100 parts by weight vinylidene chloride copolymer dry solids, and C. an organic acid salt buffer in an amount ranging from about 3 to about 10 parts by weight for each 100 parts by weight vinylidene chloride copolymer dry solids, Said water paint composition being further characterized as having a pH within the range of about 6.0 to 8.0.

Claim 19

The water paint of claim 16 wherein the vinylidene chloride copolymer emulsion comprises at least a major portion of the paint vehicle solids on a total vehicle dry solids weight basis.

Claim 20

The water paint according to claim 17 wherein the water paint vehicle consists essentially of the vinylidene chloride copolymer and a minor amount of a drying oil.

Claim 21

The water paint of claim 16 wherein substantially all of the paint vehicle is comprised of the vinylidene chloride copolymer.

Claim 22

The water paint of claim 16 wherein the vinylidene chloride copolymer is characterized as being comprised of about 45% to about 70% by weight vinylidene chloride and the amount of alkyl ester monomer in conjunction with the other copolymerized comonomers is sufficient to provide a copolymer glass transition temperature ranging from about 278*K. to about 288*K.

Claim 23

The water paint of claim 20 wherein the organic acid is an alkanoic acid having from 2 to 4 carbon atoms inclusive and the organic acid salt is at least one member selected from the group consisting of an alkali metal salt of an alkanoic acid containing from 2 to 4 carbon atoms inclusive and an ammonium salt of an alkanoic acid of 2 to 4 carbon atoms inclusive.

Claim 24

The water paint of claim 21 wherein the amount of organic acid in the water paint ranges from about 4.0 to about 6 parts by weight for each 100 parts by weight vinylidene chloride copolymer and the weight ratio of organic acid to organic acid salt ranges from about 9:10 to 3:2.

Claim 25

The water paint according to claim 22 wherein the organic acid is acetic acid and the organic acid salt is at least one member selected from the group consisting of ammonium acetate, potassium acetate and sodium acetate.

Claim 26

The water paint according to claim 23 when the organic acid salt is sodium acetate and the weight ratio of acid to salt is about 1:1.

Claim 27

The water paint according to claim 16 wherein the pigment volume concentration of the water paint ranges from about 20% to about 50%.

Claim 28

The water paint according to claim 25 wherein the organic acid is a lower alkyl monocarboxylic acid in an amount ranging from about 3.5 to about 6.0 parts by weight and the salt is at leasts one selected from the group consisting of an ammonium salt of a lower alkyl monocarboxylic and an alkali metal salt of a lower alkyl monocarboxylic acid with the weight ratio of acid to salt ranging from about 9:10 to about 3:2.

Claim 29

The water paint according to claim 26 wherein the percent by weight of the copolymerized vinylidene chloride in the copolymer is between about 45% to about 55% with the copolymer having a glass transition temperature of about 278*K. to about 293*K.

Claim 30

The water paint according to claim 27 wherein the paint composition is substantially free from lead and mercuric additive.

Claim 31

The water paint according to claim 27 wherein the pigment volume concentration is between about 23% to less than 30% and the vinylidene chloride copolymer emulsion composition solids comprises from 50% by weight to about 75% by weight of the total vehicle dry solids weight.

Claim 32

The water paint according to claim 27 wherein the pigment volume concentration ranges from about 35% to about 45% and the vinylidene chloride copolymer emulsion composition dry solids on a total vehicle dry solids weight ranges from about 35% to about 45% by weight.

Claim 33

The water paint according to claim 29 wherein the salt is sodium acetate and the acid is acetic acid.

Claim 34

The water paint according to claim 30 wherein the salt is sodium acetate and the acid is acetic acid.