Polycarbonate resin shaped articles having improved abrasion resistance
First Claim
1. A polycarbonate resin shaped article having a cured coating of a melamine-type resin on its surface through a primer layer resulting from the solidification or curing, in the presence or absence of a crosslinking agent and a crosslinking catalyst, of a primer comprising(A) a polymer containing at least 5 mole% of a recurring structural unit of the formula ##STR20## wherein R1 and R2, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and X represents a side chain containing a carboxyl or carbamoyl group, or(B) a polymer containing at least 2.5 mole% each of a recurring structural unit of the formula ##STR21## wherein R1 and R2 are the same as defined above and Y represents a hydroxyl-containing side chain,and a recurring structural unit of the formula ##STR22## wherein R3 and R4, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and Z represents a side chain containing a carboxyl group, an amino group, a substituted amino group, an epoxy group or a tetrahydrofuryl group.
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Abstract
A polycarbonate resin shaped article having a cured coating of a melamine-type resin on its surface through a primer layer resulting from the solidification or curing, in the presence or absence of a crosslinking agent and a crosslinking catalyst, of a primer comprising a polymer containing a carboxyl or carbamoyl group or a polymer containing a hydroxyl and carboxyl, amino, substituted amino, epoxy or tetrahydrofuryl group; a primer coating composition useful for the surface treatment of the above shaped article; and a method for producing the coated polycarbonate resin shaped article.
25 Citations
14 Claims
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1. A polycarbonate resin shaped article having a cured coating of a melamine-type resin on its surface through a primer layer resulting from the solidification or curing, in the presence or absence of a crosslinking agent and a crosslinking catalyst, of a primer comprising
(A) a polymer containing at least 5 mole% of a recurring structural unit of the formula ##STR20## wherein R1 and R2, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and X represents a side chain containing a carboxyl or carbamoyl group, or (B) a polymer containing at least 2.5 mole% each of a recurring structural unit of the formula ##STR21## wherein R1 and R2 are the same as defined above and Y represents a hydroxyl-containing side chain, and a recurring structural unit of the formula ##STR22## wherein R3 and R4, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and Z represents a side chain containing a carboxyl group, an amino group, a substituted amino group, an epoxy group or a tetrahydrofuryl group.
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11. A process for producing a polycarbonate resin shaped article having improved resistance to surface abrasion, which comprises coating the surface of a polycarbonate resin shaped article with a primer coating composition comprising
(A) a polymer containing at least 5 mole% of a recurring structural unit of the formula ##STR23## wherein R1 and R2, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and X represents a side chain containing a carboxyl or carbamoyl group, or (B) a polymer containing at least 2.5 mole% each of a recurring structural unit of the formula ##STR24## wherein R1 and R2 are the same as defined above and Y represents a hydroxyl-containing side chain, and a recurring structural unit of the formula ##STR25## wherein R3 and R4, independently from each other, represent a hydrogen atom or a lower alkyl or carboxyl group, and Z represents a side chain containing a carboxyl group, an amino group, a substituted amino group, an epoxy group or a tetrahydrofuryl group, in the presence or absence of a crosslinking agent and a crosslinking catalyst; - drying the resulting primer coating layer;
coating a melamine-type resin coating composition on the dried primer coating layer; and
baking the melamine-type resin coating at a temperature lower than the heat distortion temperature of the resin shaped article. - View Dependent Claims (12)
- drying the resulting primer coating layer;
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13. A process for producing a polycarbonate resin shaped article having improved resistance to surface abrasion, which comprises coating the surface of a polycarbonate resin shaped article with a primer coating composition comprising
(A) a monomeric component containing at least 5 mole%, based on the total monomer weight, of a vinyl monomer of the formula ##STR26## wherein R1 and R2, independently from each other, represents a hydrogen atom or a lower alkyl or carboxyl group, and X represents a side chain containing a carboxyl or carbamoyl group, or a monomeric component containing at least 2.5 mole%, based on the total monomer weight, each of a vinyl monomer of the formula ##STR27## wherein R1 and R2 are the same as defined above, and Y represents a side chain containing a hydroxyl group, and a vinyl monomer of the formula ##STR28## wherein R3 and R4, independently from each other, represents a hydrogen atom or a lower alkyl or carboxyl group, and Z represents a side chain containing a carboxyl, amino, substituted amino, epoxy or tetrahydrofuryl group, and (B) a polymerization initiator, in the presence or absence of a crosslinking agent and a crosslinking catalyst; - drying the resulting primer coating layer;
coating a melamine-type resin coating composition on the dried primer coating layer; and
baking the melamine-type resin coating at a temperature lower than the heat distortion temperature of the resin shaped article. - View Dependent Claims (14)
- drying the resulting primer coating layer;
Specification