Radiation-curable coating for thermoplastic substrates
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05D-003/06
B32B-027/30
출원번호
US-0140083
(1987-12-31)
발명자
/ 주소
Kerr
III Stuart R. (Evansville IN)
출원인 / 주소
General Electric Company (Pittsfield MA 02)
인용정보
피인용 횟수 :
37인용 특허 :
9
초록▼
A novel radiation curable coating composition for thermoplastic substrates contains a polyfunctional acrylic monomer, a mono-, di- or trifunctional acrylic monomer, a thermoplastic or elastomeric polymer and a photoinitiator. The coatings can be cured to hard, abrasion resistant coatings, yet retain
A novel radiation curable coating composition for thermoplastic substrates contains a polyfunctional acrylic monomer, a mono-, di- or trifunctional acrylic monomer, a thermoplastic or elastomeric polymer and a photoinitiator. The coatings can be cured to hard, abrasion resistant coatings, yet retain a significant degree of residual unsaturation. The residual unsaturation and the thermoplastic or elastomeric polymer provide excellent adhesion between the coating and topcoats.
대표청구항▼
A radiation curable coating composition for a thermoplastic substrate, which comprises: (a) a polyfunctional acrylic monomer having a degree of functionality of at least about 4; (b) a mono-, di-, or trifunctional acrylic monomer; (c) an acrylic monomer-soluble, acrylic polymer compatible thermopla
A radiation curable coating composition for a thermoplastic substrate, which comprises: (a) a polyfunctional acrylic monomer having a degree of functionality of at least about 4; (b) a mono-, di-, or trifunctional acrylic monomer; (c) an acrylic monomer-soluble, acrylic polymer compatible thermoplastic polymer, having a molecular weight greater than about 2000; and (d) a polymerization initiation amount of a polymerization initiator; wherein the polyfunctional acrylic monomer is used at a concentration sufficient to impart a topcoat-binding degree of surface unsaturation to the cured coating when cured to a hard, durable coating, wherein the thermoplastic polymer is in a surface-plasticizing amount, wherein the concentration of the polyfunctional acrylate ranges from about 5 to about 50% by wt. of the composition, the concentration of the thermoplastic polymer ranges from about 1 to about 30% by wt. of the composition, and the concentration of the mono- or difunctional acrylate ranges from about 10 to about 94% by wt. of the composition, exclusive of the polymerization initiator, wherein said initiator is employed in an amount ranging from about 0.01% to about 10% by wt. of the composition, and wherein the relative proportions of the polyfunctional acrylate, the mono-, di- or trifunctional acrylate and the thermoplastic polymer are controlled such that, upon curing, the surface of the coating has a degree of unsaturation of from about 5% to about 50%. A process for coating a thermoplastic article which comprises the steps of (i) applying a thin coating of a composition comprising: (a) a polyfunctional acrylic monomer having a degree of functionality of at least about 4; (b) a mono-, di- or trifunctional acrylic monomer; (c) an acrylic monomer-soluble, acrylic polymer compatible thermoplastic polymer, having a molecular weight greater than about 2000; and (d) a polymerization initiation amount of a polymerization initiator; wherein the polyfunctional acrylic monomer is used at a concentration sufficient to impart a topcoat-binding degree of surface unsaturation to the cured coating when cured to a hard, durable coating, wherein the thermoplastic polymer is in a surface-plasticizing amount, wherein the concentration of the polyfunctional acrylate ranges from about 5 to about 50% by wt. of the composition, the concentration of the thermoplastic polymer ranges from about 1 to about 30% by wt. of the composition, and the concentration of the mono-, di- or trifunctional acrylate ranges from about 10 to about 94% by wt. of the composition, exclusive of the polymerization initiator, wherein said initiator is employed in an amount ranging from about 0.01% to about 10% by wt. of the composition, and (ii) curing the coating from an amount of radiation sufficient to form a hard, durable coating, yet leave a topcoat binding surface unsaturation, wherein the residual unsaturation of the cured coating ranges from about 5% to about 50% and (iii) curing the coating with radiation. A thermoplastic article coated according to the process of claim 10, 11 or 12.
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