Coating system
AssigneeJotun A/S
InventorsPengpeng WANG, Jakob Stensgaard DIGET
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Abstract
The invention relates to coating system comprising at least two layers A and B, wherein said layers A and B are adjacent and wherein layer A comprises: (A) A tiecoat composition comprising: (i) A first component comprising at least one polyol resin; and (ii) A second component comprising an isocyanate compound; and wherein layer B comprises: (B) A leading edge protection (LEP) coating composition comprising: a) a first component comprising at least one polymer selected from the group consisting of polyols, polyaspartic esters, polyetheraspartic esters and mixtures thereof; and b) a second component comprising at least one polyisocyanate curing agent.
Claims20
A coating system comprising at least two layers A and B, wherein said layers A and B are adjacent and wherein layer A comprises:
- (A) A tiecoat composition comprising:
- (i) A first component comprising at least one polyol resin;
- and
- (ii) A second component comprising an isocyanate compound;
- and
- wherein layer B comprises:
- (B) A leading edge protection (LEP) coating composition comprising:
- a) a first component comprising at least one polymer selected from the group consisting of polyols, polyaspartic esters, polyetheraspartic esters and mixtures thereof;
- and
- b) a second component comprising at least one polyisocyanate curing agent.
A coating system comprising at least two layers A and B, wherein said layers A and B are adjacent and wherein layer A comprises:
- (A) A tiecoat composition comprising:
- (i) A first component comprising at least one polyol resin;
- and
- (ii) A second component comprising an isocyanate compound,
- wherein the first and second components have been mixed and cured;
- and
- wherein layer B comprises:
- (B) A leading edge protection (LEP) composition comprising:
- a) a first component comprising at least one polymer selected from the group consisting of polyols, polyaspartic esters, polyetheraspartic esters and mixtures thereof;
- and
- b) a second component comprising at least one polyisocyanate curing agent,
- wherein the first and second components have been mixed and cured.
The coating system as claimed in any preceding claim wherein the polyol resin in (A) is:
- an epoxy resin, such as a bisphenol A epoxy resin, wherein the number average molecular mass (Mn) of the epoxy resin as polyol resin (i) in (A) is at least 3000 g mol−1, preferably at least 3500 g mol−1;
- or
- the polyol resin is a phenol formaldehyde resin, preferably a novolac resin.
The coating system as claimed in any preceding claim wherein the at least one polyol resin (i) is present in an amount of 10 to 90 wt %, preferably 30 to 80 wt %, more preferably 60-75 wt % relative to the dry weight of the tiecoat layer composition (A);
- the isocyanate compound (ii) is present in an amount of 10-90 wt %, preferably 20-80 wt %, more preferably 30 to 60 wt %, relative to the dry weight of the tiecoat composition (A);
- the polyols, polyaspartic esters, polyetheraspartic esters and mixtures thereof form 30 to 60 wt % of the component a);
- the second component b) consist of the at least one polyisocyanate curing agent;
- and
- wherein the wt ratio of component a) to b) is 3:1 to 1:3.
Dependencies are inferred from the claim text.