Phosphate-stabilized polyurethane materials, cross-linked by condensation, method for their production and use thereof

• US 6,626,988 B1
• Filed: 11/15/2001
• Issued: 09/30/2003
• Est. Priority Date: 05/21/1999
• Status: Expired due to Term

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Bayer AG
• Inventors: Walter, Ulrich, Schmalstieg, Lutz, Eckhardt, Alexander, Lemmerz, Ralf
• Primary Examiner(s): Dawson, Robert
• Assistant Examiner(s): PENG, KUO LIANG
• Application Number:
  US09/980,941
• Time in Patent Office: 684 Days
• Field of Search: 528/65, 528/38, 528/25, 528/28, 528/41, 556/413, 556/418, 558/70, 568/8, 524/127, 524/589, 106/287.25
• US Class Current: 106/287.25
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/289 containing silicon
• CPC Class Codes: C08G 2190/00 Compositions for sealing or packing joints

Abstract

The invention relates to polyurethane materials, cross-linked by silane polycondensation, containing alkoxylsilane functional polyurethanes, alkaline fillers, phosphorous compounds aminosilanes, organometallic compounds and optionally additional auxiliary agents, to a method for their production and to the use thereof.

Claims

1. A polyurethane composition, which crosslinks via silane polycondensation, comprising

A) at least one alkoxysilane-functional polyurethane containing terminal groups corresponding to formula (I)

 

wherein

R represents an organic radical containing 1 to 12 carbon atoms,

n is 2, 3 or 4, and

X, Y, Z represent identical or different organic radicals, provided that at least one of the radicals represents an alkoxy group containing 1 to 4 carbon atoms,

B) at least one basic filler,

C) at least one phosphorus compound comprising a member selected from the group consisting of;

i) an ester of an orthophosphoric acid of the formula (II)

2. The polyurethane composition of claim 1 wherein component A comprises an alkoxysilane-functional polyurethane containing terminal groups corresponding to formula (I) wherein R represents a radical corresponding to formula (Ib)

wherein

R₁ represents an alkyl group containing 1 to 4 carbon atoms.

3. The polyurethane composition of claim 1 wherein component A) comprises an alkoxysilane-functional polyurethane containing terminal groups corresponding to formula (I) wherein X, Y and Z represent methoxy groups.

4. The polyurethane composition of claim 2 wherein component A) comprises an alkoxysilane-functional polyurethane containing terminal groups corresponding to formula (I) wherein X, Y and Z represent methoxy groups.

5. The polyurethane composition of claim 1 wherein component D) comprises an aminosilane corresponding to formula (III) wherein R″

represents an aminoethyl group, n is 3 and X, Y and Z represent methoxy or ethoxy radicals.

6. The polyurethane composition of claim 2 wherein component D) comprises an aminosilane corresponding to formula (III) wherein

R″

represents an aminoethyl group,

n is3and

X, Y and Z represent methoxy or ethoxy radicals.

7. The polyurethane composition of claim 3 wherein component D) comprises an aminosilane corresponding to formula (III) wherein

R″

represents an aminoethyl group,

n is 3 and

X, Y and Z represent methoxy or ethoxy radicals.

8. The polyurethane composition of claim 4 wherein component D) comprises an aminosilane corresponding to formula (III) wherein

R″

represents an aminoethyl group,

n is 3 and

X, Y and Z represent methoxy or ethoxy radicals.

9. A method of producing the polyurethane composition of claim 1 which comprises mixing components A), B), C) and E) with the exclusion of moisture and subsequently adding component D).

10. A sealant, adhesive or coating composition containing the polyurethane composition of claim 1.