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US 4,707,396 AGranted
Laminates
AssigneeBayer Aktiengesellschaft
InventorsJoachim Wank, Werner Waldenrath, Heinz Schmitz, Gunter Pakulat
Life of this patent
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Abstract
The present invention relates to laminates consisting of a thermoplastic film, a polyurethane layer, a color layer, if appropriate a second polyurethane layer and a thermoplastic layer and a process for their production.
Claims6
A laminate with a thickness of 0.5 mm to 20 mm, comprising layers (A) to (D) in the sequence (A) to (D) wherein:
- (A) is a 0.02 mm to 0.8 mm thick film of a thermoplatic;
- (B) is a polyurethane layer 2 to 80 .mu.m thick which is tack-free at room temperature and which is the reaction product of (i) 2,4- and/or 2,6-diisocyantotoluene, 4,4'-diisocyanato-diphenylmethane, isophorone diisocyanate, 1,5-diisocyanato-naphthalene or mixtures thereof, with (ii) a polyester-diol in the molecular weight range (Mw of 1,000 to 4,000 on adipic acid and a glycol which is ethylene glycol, 1,4-dihyroxybutane, 1,6-dihydroxyhexane, or mixtures thereof, and wherein (i) and (ii) have an NCO/OH equivalen ratio of (0.9:1) to (1:1.1);
- (C) is a color layer;
- and
- (D) is a thermoplatic layer with a thickness of 0.4 mm to 19 mm.
2 more elements
Dependencies are inferred from the claim text.