Sprayable polyurethane compositions
AssigneeRPG. Inc.
InventorRex R. Kotschwar
Life of this patent
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Abstract
A sprayable polyurethane composition containing an isocyanate component and a polyol component is provided, wherein the polyol component includes a polyether polyol amine; a nitrogen-free hydoxy-terminated polyether; and a sucrose-polyether polyol. Preferably, these two components are combined while spraying them individually into a mold along with a fibrous-reinforcing material.
Claims7
A sprayable polyurethane composition comprising:
- (a) a sprayable isocyanate component;
- (b) a sprayable polyol component comprising;
- (i) a tertiary amine-containing hydroxyl functional polyether polyol;
- (ii) a sucrose-polyether polyol;
- and
- (iii) a nitrogen-free hydroxy-terminated polyether polyol other than said sucrose-polyether polyol;
- and
- (c) a nonreactive adhesive-enhancing component.
A sprayable polyurethane composition comprising:
- (a) a sprayable isocyanate component comprising an aromatic isocyanate having an NCO content of about 30-32 wt-%;
- and
- (b) a sprayable polyol component comprising:
- (i) a tertiary amine-containing hydroxyl functional polyether polyol;
- (ii) a polyether diol having an OH number of about 250-270;
- (iii) a polyether triol having an OH number of about 240-260;
- (iv) a sucrose-polyether polyol;
- and
- (v) a hydroxy-free diamine curative;
- wherein the isocyanate component and the polyol component are combined in amounts such that the isocyanate index is about 105-150.
A sprayable polyurethane composition comprising:
- (a) a sprayable isocyanate component comprising a prepolymer from:
- (i) a polyisocyanate;
- and
- (ii) a nitrogen-free hydroxy-terminated polyether diol having a molecular weight of about 1000-6000;
- and
- (b) a sprayable polyol component comprising:
- (i) a tertiary amine-containing hydroxyl functional polyether polyol;
- (ii) a sucrose-polyether polyol;
- and
- (iii) a nitrogen-free hydroxy-terminated polyether polyol, other than said
- sucrose-polyether polyol.
A method for preparing a molded fiber-reinforced polyurethane comprising combining the following components while spraying them into a mold:
- (a) a sprayable isocyanate component;
- (b) a sprayable polyol component comprising:
- (i) a tertiary amine-containing hydroxyl functional polyether polyol;
- (ii) a sucrose-polyether polyol;
- and
- (iii) a nitrogen-free hydroxy-terminated polyether polyol other than said sucrose-polyether polyol;
- (c) a nonreactive adhesive-enhancing component;
- and
- (d) a fibrous-reinforcing material.
Dependencies are inferred from the claim text.