Linseed oil based copolymer coating composition
AssigneeCargill, Incorporated
InventorDharma Rao Kodali
Life of this patent
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Abstract
A copolymer of linseed oil and dicyclopentadiene provides a new polymeric vehicle and formulated coating composition which are low in volatile organic compounds (VOCs), yet provide low viscosities which facilitate application to a substrate with existing equipment.
Claims28
A composition which is the copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 5 to about 30 weight percent of the reaction mixture, the reaction of the dicyclopentadiene and linseed oil providing a composition having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C. and wherein the reaction mixture is provided by mixing dicyclopentadiene with the linseed oil at a rate of from about 0.4 to about 0.9 volume percent per minute of the total dicyclopentadiene mixed with the linseed oil, the reaction mixture being heated at a temperature of not more that about 300.degree. C. in a closed container.
A polymeric vehicle capable of being air dried at about ambient temperature, which polymeric vehicle provides a coating binder having an impact resistance of at least about 160/100 (direct/reverse) and a Sward hardness of at least about 20 after air drying for about 1 week and when applied to a substrate at a thickness of about 3 mils wet, the polymeric vehicle comprising a mixture of linseed oil copolymer and a second polymer in a ratio in the range of from about 3/97 to about 90/10 linseed oil copolymer to second polymer, the linseed oil copolymer comprising the copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 30 to about 5 weight percent of the reaction mixture, wherein the reaction mixture is provided by mixing dicyclopentadiene with the linseed oil at a rate of from about 0.4 to about 0.9 volume percent per minute of the total dicyclopentadiene mixed with the linseed oil, the reaction mixture being heated to a temperature of not more than about 300.degree. C. in a closed container, the linseed oil copolymer having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C., the second polymer selected from the group consisting of an oil modified urethane polymer, a short oil alkyd polymer, a medium oil alkyd polymer, a long oil alkyd polymer and a copolymer alkyd polymer.
A formulated coating composition which has less than about 2.9 pounds of volatile organic compounds per gallon of the formulated coating composition and which formulated coating composition will provide a coating binder having a pencil hardness of at least about B and an impact resistance of at least about 160/100 (direct/reverse) after application to a substrate at a thickness of about 3 mils wet and drying at about ambient temperature for about one week, the formulated coating composition comprising a polymeric vehicle which comprises a mixture of linseed oil copolymer and second polymer in a ratio in the range of from about 3/97 to about 90/10 linseed oil copolymer to second polymer, the linseed oil copolymer comprising the copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 30 to about 5 weight percent of the reaction mixture, wherein the reaction mixture is provided by mixing dicyclopentadiene with the linseed oil at a rate of from about 0.4 to about 0.9 volume percent per minute of the total dicyclopentadiene mixed with the linseed oil, the reaction mixture being heated to a temperature of not more than about 300.degree. C. in a closed container, the linseed oil copolymer having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C., the second polymer selected from the group consisting of a oil modified urethane polymer, a short oil alkyd polymer a medium oil alkyd polymer, a long oil alkyd polymer and a copolymer alkyd polymer.
A method for making a copolymer of linseed oil and dicyclopentadiene, the method comprising mixing linseed oil and dicyclopentadiene under nitrogen, the linseed oil having a iodine value in the range of from about 170 to about 195, the dicyclopentadiene being mixed with the linseed oil at a rate of from about 0.4 volume percent to about 0.9 volume percent per minute of the total dicyclopentadiene to be mixed at a temperature of not greater than about 300.degree. C. in a closed container, the linseed oil comprising from about 70 to about 95 weight percent of the linseed oil and dicyclopentadiene mixture and the dicyclopentadiene comprising from about 30 to about 5 weight percent of the linseed oil and dicyclopentadiene mixture, the copolymer having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C.
A composition which when combined with a second polymer is effective for providing a polymeric vehicle which polymeric vehicle will provide a formulated coating composition having not more than about 2.9 pounds per gallon volatile organic compounds and which polymeric vehicle will provide a coating binder having a pencil hardness of at least about B and an impact resistance of at least about 160/100 (direct/reverse) after application to a substrate at a thickness of about 3 mils wet and drying at about ambient temperature for about one week, the composition comprising a copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 5 to about 30 weight percent of the reaction mixture, the composition having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C., the reaction mixture being provided by the addition of the dicyclopentadiene to the linseed oil at a rate of from about 0.4 to about 0.9 volume percent per minute of the total dicyclopentadiene added to the linseed oil and the reaction mixture being heated at a temperature of not more than 300.degree. C. in a closed container.
A method for reducing volatile organic compounds in a formulated coating composition, the method comprising mixing a linseed oil dicyclopentadiene copolymer with a second polymer, the linseed oil copolymer comprising the copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 30 to about 5 weight percent of the reaction mixture, wherein the reaction mixture is provided by mixing dicyclopentadiene with the linseed oil at a rate of from about 0.4 to about 0.9 volume percent per minute of the total dicyclopentadiene mixed with the linseed oil, the reaction mixture being heated to a temperature of not more than about 300.degree. C. in a closed container, the linseed copolymer composition having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C., the second polymer selected from the group consisting of an oil modified urethane polymer, a short oil alkyd polymer, a medium oil alkyd polymer, and long oil alkyd polymer and a copolymer alkyd polymer.
A method for reducing the viscosity of a polymeric vehicle and increasing the solids content thereof, the polymeric vehicle effective for providing a coating binder having a pencil hardness of at least about B and an impact resistance of at least about 160/100 (direct/reverse) after application to a substitute at a thickness of 3 mils wet and drying at about ambient temperature for about one week, the method comprising mixing a linseed oil dicyclopentadiene copolymer with a second polymer, the linseed oil copolymer comprising the copolymerization reaction product of a reaction mixture comprising linseed oil having an iodine value in the range of from about 170 to about 195 and dicyclopentadiene, the linseed oil comprising from about 70 to about 95 weight percent of the reaction mixture and the dicyclopentadiene comprising from about 30 to about 5 weight percent of the reaction mixture, the linseed copolymer composition having a viscosity in the range of from about 100 to about 10,000 cps at 25.degree. C., the second polymer selected from the group consisting of an oil modified urethane polymer, a short oil alkyd polymer, a medium oil alkyd polymer, and long oil alkyd polymer and a copolymer alkyd polymer, and wherein the dicyclopentadiene is added to the linseed oil to form the reaction mixture, the temperature of the reaction mixture prior to and during the addition of the dicyclopentadiene with the linseed oil is not greater than about 260.degree. C. and the temperature of the reaction mixture after the addition of the dicyclopentadiene with the linseed oil is not greater than 230.degree. C., and the viscosity of the copolymer is in the range from about 100 to about 1,000 cps and 25.degree. C.
Dependencies are inferred from the claim text.