Two-component composition

Patent metadata

Field	Value
Publication number	US-10428252-B2
Application number	US-201515511340-A
Country	US
Kind code	B2
Filing date	Sep 25, 2015
Priority date	Oct 1, 2014
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A two-component composition, containing at least one silane-group-containing polymer that is liquid at room temperature, at least one epoxide liquid resin, at least one polyetheramine, and at least one aminosilane or mercaptosilane. The composition has low odor, cures quickly and without blistering at room temperature, and, when cured, forms a tough elastic material of high strength, high adhesive force, and good thermal resistance that has no tendency toward yellowing or substrate discoloration. The composition is excellently suitable as a tough elastic adhesive for structural adhesive joints in the field of construction and in industrial production.

First claim

The invention claimed is:

1. A composition comprising a first component and a second component, comprising
at least one silane group-containing polymer, liquid at room temperature,
at least one liquid epoxy resin,
at least one polyetheramine, and
at least one amino- or mercaptosilane,
the polyetheramine and the amino- or mercaptosilane not being present in the same component as the liquid epoxy resin, and
90% or more of groups reactive with an epoxide group are from the at least one polyetheramine and the at least one amino- or mercaptosilane.

2. The composition as claimed in claim 1 , wherein the silane group-containing polymer is a silane group-containing polyether.

3. The composition as claimed in claim 1 , wherein it has a silane group-containing polymer content in the range from 5 to 60 weight %.

4. The composition as claimed in claim 1 , wherein it has a liquid epoxy resin content in the range from 30 to 70 weight %.

5. The composition as claimed in claim 1 , wherein the polyetheramine has a number average molecular weight (M n ) in the range from 200 to 500 g/mol.

6. The composition as claimed in claim 1 , wherein it has a polyetheramine content in the range from 5 to 30 weight %.

7. The composition as claimed in claim 1 , wherein the amino- or mercaptosilane is a silane of the formula (I),

where
X is S or NH,
R 1 is a monovalent linear or branched hydrocarbon radical having 1 to 5 C atoms,
R 2 is a monovalent linear or branched hydrocarbon radical having 1 to 8 C atoms,
R 3 is a divalent linear or branched hydrocarbon radical having 1 to 12 C atoms, which optionally contains cyclic and/or aromatic fractions and optionally one or more heteroatoms, and
n is 0 or 1 or 2.

8. The composition as claimed in claim 1 , wherein it has an amino- or mercaptosilane content in the range from 1 to 10 weight %.

9. The composition as claimed in claim 1 , wherein the weight ratio between the liquid epoxy resin and the silane group-containing polymer is in the range from 1.2 to 10.

10. The composition as claimed in claim 1 , wherein the relative amino- or mercaptosilane content based on the sum total of the silane group-containing polymer and the liquid epoxy resin is in the range from 2 to 10 weight %.

11. The composition as claimed in claim 1 , wherein it comprises water or a water-releasing substance.

12. The composition as claimed in claim 11 , wherein it comprises at least one water-releasing substance which is a compound condensable with primary amines.

13. A cured composition obtained from a composition as claimed in claim 1 by mixing of the first component with the second component.

14. A method comprising applying a composition as claimed in claim 1 as an adhesive.

15. An adhesively bonded article obtained from a method as claimed in claim 14 .

16. The composition as claimed in claim 1 , wherein the composition comprises at least one water-releasing substance that is a compound condensable with primary amines.

17. The composition as claimed in claim 16 , wherein the at least one water-releasing substance that is a compound condensable with primary amines is at least one aldehyde, ketone, or diketone.

Assignees

• Sika Tech Ag

Inventors

• Burckhardt Urs
• Kelch Steffen
• Stadelmann Ursula

Classifications

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C09D175/08

  from polyethers · CPC title

• C08G18/718

  containing silicon · CPC title

• C09J175/08 Primary

  from polyethers · CPC title

• C08G77/458

  containing polyurethane sequences · CPC title