CURABLE MATERIAL COMPRISING SILYLATED POLYMERS CONTAINING URETHANE GROUPS, AND USE THEREOF IN SEALANTS, ADHESIVES, BINDERS AND/OR SURFACE MODIFIERS

• US 20110042004A1
• Filed: 08/19/2010
• Published: 02/24/2011
• Est. Priority Date: 08/19/2009
• Status: Active Grant

• Current Assignee: Evonik Degussa GmbH
• Original Assignee: Evonik Goldschmidt GmbH (Rag-Stiftung)
• Inventors: Silber, Stefan, Knott, Wilfried, SCHUBERT, Frank, Ferenz, Michael
• Granted Patent: US 8,993,706 B2
• Time in Patent Office: Days
• US Class Current: 156/329
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 37/1284 Application of adhesive
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 37/24 with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate B32B37/15 takes precedence
• CPC Class Codes: C08G 18/0866 the dispersing or dispersed phase being an aqueous medium
• 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 18/2825 having at least 6 carbon atoms
• CPC Class Codes: C08G 18/289 containing silicon
• CPC Class Codes: C08G 18/307 Atmospheric humidity
• CPC Class Codes: C08G 18/3228 acyclic
• CPC Class Codes: C08G 18/5096 containing silicon
• CPC Class Codes: C08G 18/718 containing silicon
• CPC Class Codes: C08G 18/755 and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 65/22 Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring
• CPC Class Codes: C08G 65/33348 containing isocyanate group
• CPC Class Codes: C08G 65/336 containing silicon
• CPC Class Codes: C08J 2375/08 from polyethers
• CPC Class Codes: C08J 9/04 : using blowing gases generated by a previously added blowing agent
• CPC Class Codes: C09D 175/08 : from polyethers
• CPC Class Codes: C09D 183/06 : containing silicon bound to oxygen-containing groups C09D183/12 takes precedence
• CPC Class Codes: C09J 183/06 : containing silicon bound to oxygen-containing groups C09J183/12 takes precedence

Abstract

Curable material comprising silylated polymers containing urethane groups, and use thereof in sealants, adhesives, binders and/or surface modifiers.

Claims

1. Curable material comprising urethane-group-containing reaction products, which is obtainable by reacting

a) at least one compound containing one or more isocyanate groups with

b) at least one compound bearing one or more alkoxysilyl groups and additionally bearing at least one hydroxyl group,

c) optionally in the presence of one or more catalysts,

d) optionally in the presence of further components reactive towards the reaction products, more particularly those components which possess functional groups having protic hydrogen,

e) optionally in the presence of further compounds which are not reactive towards the reaction products and reactants.

2. Curable material according to claim 1, characterized in that component (a) containing isocyanate groups bears no alkoxysilyl and/or alkylsilyl groups.

3. Curable material according to claim 1, characterized in that, based on the individual molecule of the reaction product, there are on average more than one alkoxysilyl group per urethane or reaction product thereof, such as allophanates and/or biuret groups or else urea groups.

4. Curable material according to claim 1, characterized in that use is made as component (b) of claim 1 of one or more silyl polyethers 1 of the formula (2)

5. Curable material according to claim 1, comprising further compounds having at least one isocyanate, hydroxyl, amino, epoxy and unsaturated C═

C group, acrylates, methacrylates, vinyl compounds, allyl compounds and/or reactive silanes or silyl-functional compounds.

6. Curable material according to claim 5, characterized in that silanes used are those of the formula (4)

U_xSiV_(4-x)  

 

(4)

where U represents identical or different groups which are non-hydrolysable in the presence of water and catalytic amounts of Brø

nsted acid at temperatures of up to 100°

C., V represents identical or different groups which are hydrolysable in the presence of water and catalytic amounts of Brø

nsted acid at temperatures up to 100°

C., or hydroxyl groups, and x is 1, 2, 3 or 4,

and/or silyl-functional compounds used are those of the formula (5)

7. Curable material according to claim 1, comprising one or more blowing agents formed optionally chemically and/or physically.

8. A method of improving the adhesive properties of composition selected from the group consisting of curable compositions, adhesives, sealants, sealing compounds, binders, surface-coating materials, reactive crosslinkers, adhesion promoters, water repellents, wetting agents, primers and/or surface modifiers, architectural water repellents, additives in lacquer formulations, nail varnish formulations, reactive diluents, emulsions, wetting agents, paints, adhesion promoters, binders, plasticisizers, thixotropic agents, fungicides, flame retardants, pigments, fillers, functional additives in plastics, polymeric foams, organic resins or silicone resins, melt-flow-index improvers, slip additives for textiles or fibres, lubricants, matting agents, adsorbants or absorbants, self-dispersible particles, particulate emulsifiers, defoamers, binders for ceramic compositions, architectural preservatives, encapsulants, sealing systems, antistatic additives, free-flow aids, microbicidal additives, fluorescent markers, effect pigments, matting agents, release agents, low-temperature-resistant cable coatings, conductive coatings, conductor tracks, antistatic coatings, electronic and/or electrical components, rubber parts and membranes, sizes in the textile and glass fibre industries, paper, additives for toners, abrasives or line fillers in cosmetics, formulating agents or carrier materials, dyes and preservatives, coatings, corrosion inhibitors, inks, varnishes, tribological and haptic coatings which comprises of adding a curable material of claim 1 to said composition.

9. The method of claim 8 on or for different macroscopic or microscopic substrates selected from the group of metals and/or metal oxides, glass and glass fibres/glass fabrics, wood, wood-based materials, natural fibres, and also, for example, cork and/or, generally, silicatic materials, concrete, mortar, plaster, masonry, and/or particles, oxidic particles, fumed silica, precipitated silicas, quartz particles and other inorganic oxide particles, glass particles, titanium dioxide, aluminium oxide, zirconium dioxide, cerium dioxide, iron oxides, copper oxides, kaolin, wollastonite, talc, mica, feldspars, hydroxides, aluminium trihydroxide, magnesium dihydroxide, boehmite, hydrotalcite and hydroxydic iron pigments, FeO(OH), carbonates, calcium carbonate and/or dolomite, iron, copper, zinc, nickel, aluminium, magnesium, metal alloys and/or carbon-containing materials, graphite and/or carbon black, organic particulate substrates, silicone resins, organically modified silicones, organic polymers and/or biopolymers, leather, tissue, paper and/or mixtures thereof.

10. The method of claim 9 in the form of solutions of emulsions or suspensions or foams.

11. A method of joining surfaces, wherein a curable material according to claim 1 is provided which is applied to at least one of the surfaces to be joined or between the surfaces to be joined, which are then bonded adhesively with curing.

12. The method according to claim 11, characterized in that the curable material is applied in the form of a foam.

13. A method of sealing or bridging or filling surfaces, cracks or gaps, wherein a curable material according to claim 1 is provided which is applied between the surfaces to be sealed, followed by curing.

14. The method according to claim 13, characterized in that the curable material is applied in the form of a foam.

15. A method for surface-modifying particles or sheet structures, characterized in that the curable materials according to claim 1 are applied, with mixing and/or in the presence of suitable crosslinking catalysts, as they are or from suitable organic or inorganic solvents, to the particle surfaces or sheetlike structures, or from emulsions, and then react thereon with covalent or physical attachment.

16. The method according to claim 15, characterized in that surfaces to be modified that are used are inorganic and/or organic particles or sheetlike structures and/or organically modified particles or sheetlike structures and/or mixtures thereof with one another.

17. The method of claim 10, characterized in that the emulsions and/or suspensions comprise compounds selected from the groups of catalysts, photolatent bases, additives for modifying the rheological properties, hydrophilic fillers, organofunctional and/or partially soluble and/or water-insoluble silanes and/or siloxanes, auxiliaries, film formers, antimicrobial and preservative substances, dispersants, defoamers and deaerating agents, dyes, colorants and pigments, anti-freeze agents, fungicides, adhesion promoters and/or reactive diluents, plasticizers and complexing agents, spraying assistants, wetting agents, vitamins, growth substances, hormones and/or fragrances, light stabilizers, free-radical scavengers, UV absorbers and/or stabilizers.

18. A method for generating antistatic surfaces and/or as starting material for the production of rubber parts on the basis of polypropylene oxide which comprises adding the emulsions and/or suspensions according to claim 17 as base materials for varnishes, inks, release agents, adhesives, cosmetic products, scratch-resistant coatings, architectural preservatives, corrosion inhibitors and/or sealants, for coating paper, particles, textile fibres and glass fibres, and coating fillers for paper.