Aqueous reactive putties (II)

• US 6,562,894 B1
• Filed: 06/14/2001
• Issued: 05/13/2003
• Est. Priority Date: 12/21/1998
• Status: Expired due to Fees

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Irle, Christoph, Blum, Harald, Ehlers, Michael, Wolff, Joachim, Probst, Joachim, Clemens, Horst
• Primary Examiner(s): Cain, Edward J.
• Application Number:
  US09/868,127
• Time in Patent Office: 698 Days
• Field of Search: 524/507, 524/591
• US Class Current: 524/507
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 18/12 using two or more compounds having active hydrogen in the first polymerisation step
• CPC Class Codes: C08G 18/3225 Polyamines
• CPC Class Codes: C08G 18/3271 Hydroxyamines
• CPC Class Codes: C08G 18/6254 Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups
• CPC Class Codes: C08G 18/706 the liquid medium being water
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/7837 containing allophanate groups
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 18/798 containing urethdione groups
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: C09D 5/34 Filling pastes materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12
• CPC Class Codes: Y10T 428/31573 Next to addition polymer of ethylenically unsaturated monomer
• CPC Class Codes: Y10T 428/31576 Ester monomer type [polyvinylacetate, etc.]
• CPC Class Codes: Y10T 428/31587 Hydrocarbon polymer [polyethylene, polybutadiene, etc.]

Abstract

The invention relates to aqueous reactive 2-component binder combinations for aqueous reactive filler compositions, processes for the preparation of aqueous reactive filler compositions based on aqueous reactive 2-component binder combinations and the use of such filler compositions.

Claims

1. An aqueous, reactive, filler composition comprising

a) 22 to 38 wt. % of at least one polyurethane-polyurea dispersion,

b) 1 to 7.5 wt. % of at least one polyisocyanate which contains free isocyanate groups and has a viscosity of 10 to 10,000 mPas/23°

C. and a functionality of 2.15 to 5.0,

c) 53 to 75 wt. % of at least one pigment and/or filler,

d) 0 to 2 wt. % of an auxiliary substance or additive,

e) 0 to 20 wt. % of an oligomer or polymer other than a), optionally present in the form of an aqueous solution, dispersion or emulsion and

f) 0 to 10 wt. % of water and/or an organic solvent,

wherein the sum of a) to f) is 100 wt. % and the weight ratio of resin (solids from component a), component b) and component e)) to pigment/filler (solids from component c)) is 1;

2.1 to 1;

10.

2. A process for the preparation of the aqueous, reactive, filler composition of claim 1 which comprises preparing at least 85 wt. % of the filler composition with the consistency required for processing by mixing polyurethane or polyurethane-polyurea dispersion a) with pigment or filler c), optionally auxiliary substance or additive d), optionally other oligomer or polymer e) and optionally up to 20 wt. %, based on the total solids content, of an organic solvent and/or water f) and then homogeneously mixing directly before processing not more than 15 wt. %, based on the filler composition, of polyisocyanate b).

3. The process of claim 2 which comprises preparing 90.2 to 99.7 wt. % of the filler composition with the consistency required for processing by mixing polyurethane or polyurethane-polyurea dispersion a) with pigment or filler c), optionally auxiliary substance or additive d), optionally other oligomer or polymer e) and optionally up to 20 wt. %, based on the total solids content, of an organic solvent and/or water f) and then homogeneously mixing directly before processing 0.3 to 9.8 wt. %, based on the filler composition, of polyisocyanate b).

4. The process of claim 2 which comprises preparing 96 to 99.5 wt. % of the filler composition with the consistency required for processing by mixing polyurethane-polyurea dispersion a), which contains isocyanate-reactive groups, with pigment or filler c), optionally auxiliary substance or additive d), optionally other oligomer or polymer e) and optionally up to 10 wt. %, based on the total solids content, of an organic solvent and/or water f) and then homogeneously mixing directly before processing 0.5 to 4 wt. %, based on the filler composition, of polyisocyanate b).

5. A process for the preparation of aqueous, reactive, filler composition of claim 1 which comprises preparing the filler composition directly before processing from polyurethane or polyurethane-polyurea dispersion a), pigment or filler c), optionally auxiliary substance or additive d), optionally other oligomer or polymer e), optionally up to 10 wt. %, based on the total solids content, of an organic solvent and/or water f) and polyisocyanate b) and then optionally adjusting to the required processing consistency by the addition of water and/or an organic solvent.

6. The aqueous, reactive, two-component binder composition of claim 1 wherein polyisocyanate b) comprises an allophanate-hydrophilic polyisocyanate prepared by the reaction of a hydrophilic polyether with aliphatic and/or cycloaliphatic polyisocyanate employing suitable catalysts.

7. The aqueous, reactive, two-component binder composition of claim 1 wherein polyisocyanate b) comprises a hexamethylene-diisocyanate polyisocyanate with iminooxadiazinedione groups.

8. The aqueous, reactive, two-component binder composition of claim 1 wherein polyisocyanate b) comprises nonane triisocyanate.

9. The aqueous reactive filler composition of claim 1 wherein component c) comprises not more than 10 wt. %, based on the total amount of c), of an inorganic coloring pigment.

10. The aqueous, reactive, two-component binder composition of claim 1 wherein component a3) containing hydrophilic groups is incorporated partly or completely into polyol compound a1), via ester groups, into the polyurethane or polyurethane-polyurea dispersion a).

11. The aqueous, reactive, two-component binder composition of claim 1 wherein polyisocyanate b) comprises a low viscosity hydrophobic polyisocyanate based on hexamethylene diisocyanate and containing isocyanurate, uretdione, allophanate and/or urethane groups and/or a polyisocyanate based on hexamethylene diisocyanate and hydrophilically modified by reaction with a hydrophilic polyether.

12. The aqueous, reactive, two-component binder composition of claim 1 wherein component a) comprises a copolymer- or polyacrylate-modified polyurethane or polyurethane-polyurea dispersion.

13. The aqueous, reactive, two-component binder composition of claim 1 wherein the polyurethane or polyurethane-polyurea dispersion of component a) has a molecular weight, Mw, of >

50,000.

14. The aqueous, reactive, two-component binder composition of claim 1 wherein component e) comprises an epoxy-functional oligomer or polymer.

15. The aqueous, reactive, two-component binder composition of claim 1 wherein components a) and b) are selected from light-fast compounds.

17. A substrate coated with the aqueous, reactive, two-component binder composition of claim 1.

18. Wood, a woody substrate or cork coated with the aqueous, reactive, filler composition of claim 1.

19. A metallic substrate, vehicle body plastic coated with the aqueous, reactive, two-component binder composition of claim 1.

20. A marble, granite or mineral substrate coated with the aqueous, reactive, two-component binder composition of claim 1.

21. A glass fiber-reinforced plastic, glass fiber-reinforced sheet-like structure or casting resin coated with the aqueous, reactive, two-component binder composition of claim 1.

16. The aqueous, reactive, filler composition of 1 which contains less than 5 wt. % of volatile organic substances.