Powder coating formulations for heat sensitive substrates and methods thereof
OwnerRajendra Polu, Glynn Mason +1inventors
InventorsRajendra Polu, Glynn Mason, Yotzin Mason
Life of this patent
Estimating the term…
Abstract
Provided herein are powder formulations for a heat sensitive substrate, and methods of applying the powder formulations to at least a portion of a surface of a substrate. The powder formulations can include an acid functional polyester resin, a curing agent, a degassing agent, one or more spherical fillers, a phase-transfer catalyst, a flow modifier, a transfer efficiency additive, an antistatic agent, and other optional components. The methods can include pre-heating a substrate to a first temperature, applying a powder formulation to the substrate, and then heating the substrate with the coating applied to a second temperature.
Claims25
A powder formulation for a heat sensitive substrate, comprising:
- about 30 wt % to about 90 wt % of an acid functional polyester resin;
- about 3 wt % to about 10 wt % of a curing agent;
- about 0.1 wt % to about 6 wt % of a catalyst;
- about 0.1 wt % to about 5 wt % of a transfer efficiency additive;
- about 0.1 wt % to about 5 wt % of an antistatic agent;
- and
- one or both of the following:
- about 1 wt % to about 30 wt % of a spherical filler, and about 0.1 wt. % to about 40 wt. % of a gloss reducer.
A powder formulation for a heat sensitive substrate, comprising:
- about 30 wt % to about 90 wt % of an acid functional polyester resin;
- about 3 wt % to about 10 wt % of a curing agent;
- about 0.1 wt % to about 5 wt % of a degassing agent;
- about 0.1 wt % to about 6 wt % of a catalyst;
- about 0.1 wt % to about 5 wt % of a flow modifier;
- about 0.1 wt % to about 5 wt % of a transfer efficiency additive;
- about 0.1 wt % to about 5 wt % of an antistatic agent;
- and
- one or more of the following:
- about 1 wt % to about 20 wt % of a spherical filler, about 1 wt % to about 30 wt % of an amorphous metal silicate, about 1 wt % to about 30 wt % of a crystalline resin, about 0.1 wt % to about 5 wt % of a thermoplastic additive, about 1 wt % to about 30 wt % of an adhesion promoter, about 0.1 wt % to about 5 wt % of a co-crosslinker, and about 0.1 wt % to about 40 wt % of a gloss reducer.
-24. (canceled)
-56. (canceled)
-88. (canceled)
A powder formulation for a heat sensitive substrate comprising:
- about 40 wt % to about 65 wt % of an acid functional polyester resin;
- about 4 wt % to about 10 wt % of a curing agent;
- about 0.05 wt % to about 5 wt % of a degassing agent;
- about 1 wt % to about 20 wt % of one or more spherical fillers;
- about 1 wt % to about 30 wt % of an amorphous metal silicate;
- about 0.1 wt % to about 5 wt % of a phase-transfer catalyst;
- about 0.1 wt % to about 5 wt % of a flow modifier;
- about 0.1 wt % to about 5 wt % of a transfer efficiency additive;
- and
- about 0.1 wt % to about 2 wt % of an antistatic agent.
-100. (canceled)
-105. (canceled)
Dependencies are inferred from the claim text.