Fungus resistant protective coatings

Claim 2

A non-volatile composition for an air curable protective paint to control fungal and microbial growth on structures comprising: a. 30 to 70% by weight of a high tin content first reaction product, formed by the reaction of tributyltin oxide with the carboxyl groups of free fatty acids, that will not air cure to form a hard film; b. said first reaction product being combined with 70 to 30% by weight of a phthalic alkyd polymer having a resin acid value less than 20 to form a homogeneous blend which cures in air to form a hard film; c. the quantity of tributyltin oxide in the first reaction product being sufficient to react with all the carboxyl groups of said free fatty acids so that no free carboxyl groups remain present in said first reaction product; d. said composition providing an alkyd protective coating polymer having an internal biocidal material incorporated into the polymer as a chemically-bound component, said biocidal material being released at a controlled rate by hydrolysis thus retarding fungal and microbial growths on structures to which the coating is applied.

Claim 3

A non-volatile composition as set forth in claim 1 wherein said phthalic alkyd polymer is reacted with tributyltin oxide to form a second reaction product which contains up to 2% by weight of tin compound prior to being combined with said first reaction product.

Claim 4

A tin containing alkyd resin for formulating aor curable protective paint to control fungal and microbial growth on structures, comprising the composition formed by: reacting a phthalic alkyd polymer having a resin acid value less than 20 with an equivalent amount of tri-N-butyltin oxide in boiling benezene (approximately 80° C.) so that no free carboxyl groups are present; said resin acid value being calculated such that the quantity of tri-N-butyltin oxide used reacts with all the free carboxyl groups and there is no excess tin compound remaining;

Claim 5

A tin containing alkyd resin for formulating aor curable protective paint to control fungal and microbial growth on structures, comprising the composition formed by: reacting a phthalic alkyd polymer having a resin acid value less than 20 with an equivalent amount of tri-N-butyltin oxide in boiling benezene (approximately 80° C.) so that no free carboxyl groups are present; said resin acid value being calculated such that the quantity of tri-N-butyltin oxide used reacts with all the free carboxyl groups and there is no excess tin compound remaining;

Claim 6

An air curable protective paint for controlling fungal and microbial growth on structures comprising: a. a non-volatile vehicle composition containing no free carboxyl groups and comprised of: 70 to 30% by weight of a first reaction product, that will not air cure to form a solid film, formed by reacting tributyltin oxide with the carboxyl groups of free fatty acids; said first reaction product being combined with 30 to 70% by weight alkyd resin having an acid value of less than 20 to form a homogeneous blend which cures in air to form a solid film; the quantity of tributyltin oxide in the first reaction product being sufficient to react with all the carboxyl groups of said free fatty acids so that no free carboxyl groups remain present in the first reaction product; b. up to 65% by weight pigmentation and driers; c. up to 30% by weight mineral spirits; d. said composition providing an alkyd protective coating polymer having an internal biocidal material incorporated into the polymer as a chemically-bound component, said biocidal material being released at a controlled rate by hydrolysis thus retarding fungal and microbial growths on structures to which the paint is applied.

Claim 7

An air curable protective paint for controlling fungal and microbial growth on structures comprising: a. a non-volatile vehicle composition containing no free carboxyl groups and comprised of: 70 to 30% by weight of a first reaction product, that will not air cure to form a solid film, formed by reacting tributyltin oxide with the carboxyl groups of free fatty acids; said first reaction product being combined with 30 to 70% by weight alkyd resin having an acid value of less than 20 to form a homogeneous blend which cures in air to form a solid film; the quantity of tributyltin oxide in the first reaction product being sufficient to react with all the carboxyl groups of said free fatty acids so that no free carboxyl groups remain present in the first reaction product; b. up to 65% by weight pigmentation and driers; c. up to 30% by weight mineral spirits; d. said composition providing an alkyd protective coating polymer having an internal biocidal material incorporated into the polymer as a chemically-bound component, said biocidal material being released at a controlled rate by hydrolysis thus retarding fungal and microbial growths on structures to which the paint is applied.

Claim 8

A protective paint as in claim 4 wherein said non-volatile vehicle contains up to approximately 2% by weight of tin.

Claim 9

A protective paint as set forth in claim 4 wherein said alkyd resin has been reacted with up to approximately 2% by weight of tributyltin oxide to form a second reaction product having no free carboxyl groups present prior to being combined with said first reaction product.

Claim 10

A protective paint as in claim 4 wherein said free fatty acids are produced from the hydrolysis of any of linseed, tung, and soybean oils.

Claim 11

A protective coating as in claim 4 wherein said free fatty acid is a free vegetable oil acid.

Claim 12

A protective paint as set forth in claim 4 wherein said alkyd resin is that formed by reaction of any of vegetable and fish oils with phthalic anhydride.

Claim 13

A protective paint in claim 4 wherein said alkyd resin is reacted with an organotin compound prior to being combined with said first reaction product.

Claim 14

A non-volatile, air curable protective coating for controlling fungal and microbial growth on structures exposed to the atmosphere comprising: a. 70 to 30% by weight of a first reaction product formed by reacting a free fatty acid with tributyltin oxide to form a product that will not cure in air to form a solid film; b. combining said first reaction product with from 30 to 70% by weight of phthalic alkyd polymer having a resin acid value less than 20 to form a homogeneous blend that contains no free carboxyl groups and is capable of being pigmented and will cure in air to form solid protective biocidal films; c. the quantity of tributyltin oxide in the first reaction product being sufficient to react with all the carboxyl groups of said free fatty acid so that no free carboxyl groups remain present in said first reaction product.

Claim 15

A non-volatile, air curable protective coating for controlling fungal and microbial growth on structures exposed to the atmosphere comprising: a. 70 to 30% by weight of a first reaction product formed by reacting a free fatty acid with tributyltin oxide to form a product that will not cure in air to form a solid film; b. combining said first reaction product with from 30 to 70% by weight of phthalic alkyd polymer having a resin acid value less than 20 to form a homogeneous blend that contains no free carboxyl groups and is capable of being pigmented and will cure in air to form solid protective biocidal films; c. the quantity of tributyltin oxide in the first reaction product being sufficient to react with all the carboxyl groups of said free fatty acid so that no free carboxyl groups remain present in said first reaction product.

Claim 16

A coating composition as set forth in claim 11 wherein said phthalic alkyd polymer is reacted with an organotin compound to form a second reaction product which contains up to 2% by weight of tin compound prior to being combined with said first reaction product.

Claim 17

An air curable protective paint for controlling fungal and microbial growth on structures exposed to the atmosphere comprising the mixture of: a. 10 to 12 percent by weight of an alkyd resin; b. 15 percent by weight of the reaction product of tributyltin oxide with the carboxyl groups of a fatty acid, the quantity of tributyltin oxide in said reaction product being sufficient to react with all the carboxyl groups of said fatty acid so that no free carboxyl groups remain present in said reaction product and said reaction product will not air cure to form a hard film; c. 28 to 30 percent by weight rutile titanium dioxide; d. up to 28 percent by weight powdered silica; e. up to 18 percent by weight talc; f. 25 to 27 percent by weight mineral spirits; g. 0.01 to 0.5 percent by weight of driers; h. said composition providing an alkyd protective coating polymer having an internal biocidal material incorporated into the polymer as a chemically-bound component, said biocidal material being released at a controlled rate by hydrolysis thus retarding fungal and microbial growths on structures to which the paint is applied.

Claim 18

An air curable protective paint for controlling fungal and microbial growth on structures exposed to the atmosphere comprising the mixture of: a. 10 to 12 percent by weight of an alkyd resin; b. 15 percent by weight of the reaction product of tributyltin oxide with the carboxyl groups of a fatty acid, the quantity of tributyltin oxide in said reaction product being sufficient to react with all the carboxyl groups of said fatty acid so that no free carboxyl groups remain present in said reaction product and said reaction product will not air cure to form a hard film; c. 28 to 30 percent by weight rutile titanium dioxide; d. up to 28 percent by weight powdered silica; e. up to 18 percent by weight talc; f. 25 to 27 percent by weight mineral spirits; g. 0.01 to 0.5 percent by weight of driers; h. said composition providing an alkyd protective coating polymer having an internal biocidal material incorporated into the polymer as a chemically-bound component, said biocidal material being released at a controlled rate by hydrolysis thus retarding fungal and microbial growths on structures to which the paint is applied.