摘要:
The present invention relates to a thermosetting powder paint comprising, as essential components, (A) a copolymer of particular composition composed of a glycidyl group-containing monomer, styrene and other monomer copolymerizable therewith and, as curing agents capable of reacting with the component (A) to crosslink the component (A), (B) an aliphatic polycarboxylic acid and (C) a linear anhydride of an aliphatic polycarboxylic acid; a coating method using the above thermosetting powder paint; and a coated article obtained by using the above thermosetting powder paint. The above thermosetting powder paint, when used as a paint for automobile, has excellent storage stability and gives a coating film having excellent appearance, properties, weathering resistance and yellowing resistance; therefore, the paint can be favorably used particularly as an top coat and an intermediate coat for automobile and its parts.
摘要:
There is disclosed a resin composition for powder coatings, which comprises a blend of two acrylic resins being obtained by polymerizing a proscribed amount of monomer component (a-1) represented by formula (I) and a prescribed amount of another monomer component (a-2), respectively, and having different polymerization degrees represented by viscosities at 140°C and a polybasic acid compound in 1.5 to 0.5 equivalent ratio of the glycidyl groups in said acrylic resins to the acid groups in the polybasic acid compound. wherein R 1 and R 2 each represent a hydrogen atom or a lower alkyl group. Disclosure described provides a resin composition for powder coatings that can form a coating film having a mat smooth appearance and excellent in flexibility as shown Du pont impact resistance and the Ericksen test as well as excellent in nail scratch resistance.
摘要:
There is disclosed a resin composition for powder coatings, which comprises a blend of two acrylic resins being obtained by polymerizing a proscribed amount of monomer component (a-1) represented by formula (I) and a prescribed amount of another monomer component (a-2), respectively, and having different polymerization degrees represented by viscosities at 140°C and a polybasic acid compound in 1.5 to 0.5 equivalent ratio of the glycidyl groups in said acrylic resins to the acid groups in the polybasic acid compound. wherein R 1 and R 2 each represent a hydrogen atom or a lower alkyl group. Disclosure described provides a resin composition for powder coatings that can form a coating film having a mat smooth appearance and excellent in flexibility as shown Du pont impact resistance and the Ericksen test as well as excellent in nail scratch resistance.
摘要:
A heat-curable powder paint composition comprising a copolymer (A) obtained by radical copolymerization of (a1) a monomer having both an unsaturated double bond and a non-radical-polymerizable reactive functional group (e.g. glycidyl or hydroxyl group), (a2) a monomer having no reactive functional group other than an unsaturated double bond, and (a3) a silicone macromer having essentially no reactive functional group other than an unsaturated double bond in a specific ratio; and curing agent (B). The paint composition of this invention can achieve excellent performance simultaneously with respect to storage stability and coating film properties (such as appearance characteristics, physical characteristics and chemical characteristics).
摘要:
Polyisocyanato-isocyanurate and mixture of the same obtained by trimerizing straight chain aliphatic diisocyanate represented by the formula: OCN-R₄-NCO wherein R₄ is an alkylene group having 2 - 12 carbon atoms and polycyclo-aliphatic diisocyanate represented by the formula:
wherein k is an integer of 0 to 2, j and m are integers of 1 to 5, and h is an integer of 0 to 2; powder-paint curing agent which contains blocked isocyanate obtained by reacting the above raw materials with a blocking agent having at least one active hydrogen in a moelcule; non-yellowing urethane paint resin prepared from the above raw materials and compound having at least two active hydrogen in a molecule; and paint composition comprising the curing agent and the resin; is disclosed.
摘要:
A heat-curable powder paint composition comprising a copolymer (A) obtained by radical copolymerization of (a1) a monomer having both an unsaturated double bond and a non-radical-polymerizable reactive functional group (e.g. glycidyl or hydroxyl group), (a2) a monomer having no reactive functional group other than an unsaturated double bond, and (a3) a silicone macromer having essentially no reactive functional group other than an unsaturated double bond in a specific ratio; and curing agent (B). The paint composition of this invention can achieve excellent performance simultaneously with respect to storage stability and coating film properties (such as appearance characteristics, physical characteristics and chemical characteristics).