Preparation of flexible, flame-bondable polyurethane-polyether foams having improved adhesion
First Claim
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1. A process for the preparation of a flexible, flame-bonded polyurethane-polyether block foam article, said process comprising:
- admixing conventional polyurethane polyether foam reactants and at least one diol;
reacting said foam reactants and diol and foaming said foam reactants and diol in a mold to form a polyurethane-polyether block foam; and
flame bonding a sheet-like material onto a surface of said block foam to form the block foam article.
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Abstract
A flexible, flame-bondable polyurethane-polyether block foam is prepared by a process in which at least one diol is added to the block foam.
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Citations
15 Claims
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1. A process for the preparation of a flexible, flame-bonded polyurethane-polyether block foam article, said process comprising:
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admixing conventional polyurethane polyether foam reactants and at least one diol; reacting said foam reactants and diol and foaming said foam reactants and diol in a mold to form a polyurethane-polyether block foam; and flame bonding a sheet-like material onto a surface of said block foam to form the block foam article. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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4. A process as claimed in claim 3, wherein said diol is a polymer diol of the formula (II) and has a number average molecular weight of from 300 to 1500.
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5. A process as claimed in claim 1, wherein said diol is selected from the group consisting of polyethylene glycol, polyethylene glycol propoxylate, polypropylene glycol, polypropylene glycol ethoxylate and polypropylene glycol propoxylate.
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6. A process as claimed in claim 1, wherein the polyurethane-polyether block foam is prepared using at least one filler-containing polyol or a mixture of at least one filler-containing polyol and at least one conventional polyetherpolyol.
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7. A flexible, flame-bonded polyurethane-polyether block foam article obtained by the process of claim 1.
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8. A process for the preparation of a flexible, flame-bonded polyurethane-polyether block foam article, said process comprising:
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(1) reacting (a) an isocyanate with (b) a polyol and (c) a diol, in the presence of (d) a blowing agent and, optionally, (e) a silicone stabilizer, (f) a catalyst and (g) auxiliaries (2) foaming the reactants in a mold to form a polyurethane-polyether block foam; and (3) flame bonding a sheet-like material onto a surface of said block foam to form the block foam article. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification