Powdery polyurethane lacquers based on polyester resins and bloc

Details Powdery polyurethane lacquers based on polyester resins and bloc Powdery polyurethane lacquers based on polyester resins and bloc

1978-07-31

1981-01-20

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

427185, 427195, 525131, 525374, 525528, 528 45, 528902, 428402, C08G 1880, C08G 1842

Patent

active

042463807

ABSTRACT:
A powdery polyurethane lacquer which comprises (a) a hydroxyl-group containing polyester resin with an OH number of 40-240 and (b) an .epsilon.-caprolactam-blocked polyisocyanate, selected from the group consisting of triisocyanatoisocyanurate of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate and mixtures of said triisocyanatoisocyanurate with monomeric or oligomeric 3-isocyanatomethyl-3,5,5-trimethyl-cyclohexylisocyanate; wherein the .epsilon.-caprolactam-blocked triisocyanatoisocyanurate has at least two blocked isocyanate groups and wherein the .epsilon.-caprolactam-polyisocyanate is present in an amount sufficient to cause hardening of said mixture of (a) and (b). The lacquer is especially useful for electrostatic coating of substrates.

REFERENCES:
patent: 3819586 (1974-06-01), Rudolph et al.
patent: 3893977 (1975-07-01), Wingler
patent: 3922253 (1975-11-01), Jerabek et al.
patent: 3931117 (1976-01-01), Leonard
patent: 3993849 (1976-11-01), Victorius
patent: 3998768 (1976-12-01), Pettit
patent: 4018744 (1977-04-01), Wolgemuth
patent: 4028309 (1977-06-01), Fang
patent: 4150211 (1979-04-01), Muller et al.

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