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:
Herein disclosed are a polyisocyanato-isocyanurate represented by the following formula (I): wherein n is an integer ranging 1 to 5 and R₁, R₂ and R₃ may be the same or different and each represents hydrogen atom or a lower alkyl group and a method for preparing it; and a resin containing an organic polyisocyanate containing not lower than 10% by weight of the polyisocyanato-isocyanurate represented by Formula (I) and a compound having at least two active hydrogen atoms as well as a resin composition for coating materials which comprises the resin.
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 composition for thermosetting powder coating, which comprises (a) an acrylic copolymer of high softening point having an epoxy equivalent of 250-1,000 g/eq and a softening point of 90-160 o C, (b) an acrylic copolymer of low softening point having an epoxy equivalent of 200-600 g/eq and a softening point of 30-70 o C, (c) a polycarboxylic acid, and (d) optionally, a phosphoric acid ester compound and/or a phosphorous acid ester compound, and wherein the difference in softening point between (a) and (b) is 60-120 o C, the weight ratio of (a)/(b) is 95/5 to 60/40, and the equivalent ratio of [the total epoxy groups of (a) and (b)] : [the acid group of (c)] is 0.5 : 1 to 1 : 0.5. Said composition has excellent storage stability and, when used as a coating for automobiles, gives a film superior in appearance, solvent resistance and acid resistance.
摘要:
A composition for thermosetting powder coating, which comprises
(a) an acrylic copolymer of high softening point having an epoxy equivalent of 250-1,000 g/eq and a softening point of 90-160 o C, (b) an acrylic copolymer of low softening point having an epoxy equivalent of 200-600 g/eq and a softening point of 30-70 o C, (c) a polycarboxylic acid, and (d) optionally, a phosphoric acid ester compound and/or a phosphorous acid ester compound, and wherein the difference in softening point between (a) and (b) is 60-120 o C, the weight ratio of (a)/(b) is 95/5 to 60/40, and the equivalent ratio of [the total epoxy groups of (a) and (b)] : [the acid group of (c)] is 0.5 : 1 to 1 : 0.5. Said composition has excellent storage stability and, when used as a coating for automobiles, gives a film superior in appearance, solvent resistance and acid resistance.
摘要:
Herein disclosed are a polyisocyanato-isocyanurate represented by the following formula (I): wherein n is an integer ranging 1 to 5 and R₁, R₂ and R₃ may be the same or different and each represents hydrogen atom or a lower alkyl group and a method for preparing it; and a resin containing an organic polyisocyanate containing not lower than 10% by weight of the polyisocyanato-isocyanurate represented by Formula (I) and a compound having at least two active hydrogen atoms as well as a resin composition for coating materials which comprises the resin.