Adhesive promoter

Patent metadata

Field	Value
Publication number	US-9617454-B2
Application number	US-201213979229-A
Country	US
Kind code	B2
Filing date	Jan 24, 2012
Priority date	Feb 3, 2011
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The present invention relates to an adhesive promoter composition, containing:
at least one film-forming resin; at least one aromatic polyisocyanate; at least one solvent; as well as at least one specific isocyanurate containing silane groups.

Adhesive promoter compositions according to the invention are suitable in particular for improving the adhesion of adhesives and sealants to glass and glass ceramics.

First claim

The invention claimed is:

1. An adhesive promoter composition comprising:
1 to 30% by weight of at least one film-forming resin;
0.01 to 40% by weight of at least two aromatic polyisocyanates;
10 to 90% by weight of at least one solvent;
0.1 to 10% by weight of tris(3-(trimethoxysilyl)propyl) isocyanurate; and
0 to 20% by weight of filler, each weight based on the total weight of the adhesive promoter composition,
wherein at least one film-forming resin is a polyester film-forming resin having (i) at least one hydroxyl group, which has been reacted with an isocyanate group of the aromatic polyisocyanate in the adhesive promoter composition, and (ii) a molecular weight in the range of 3000 to 100,000 g/mol and an average OH number in the range of 1 to 10 mg KOH/g, and
at least one of the at least two aromatic polyisocyanates includes tris(p-isocyanatophenyl) thiophosphate.

2. The adhesive promoter composition according to claim 1 , wherein the adhesive promoter composition further comprises at least one aliphatic polyisocyanate.

3. The adhesive promoter composition according to claim 1 , wherein the adhesive promoter composition further comprises at least one silane of the formula R 4 —Si(R 1 ) a (OR 2 ) 3-a , wherein
R 1 is a linear or branched monovalent hydrocarbon radical having 1 to 12 carbon atoms;
R 2 is a linear or branched monovalent hydrocarbon radical having 1 to 12 carbon atoms;
R 4 is an alkyl radical having at least one functional group;
a is a value of 0, 1 or 2; and wherein
the functional group of the silane has optionally been reacted with an isocyanate group of an aromatic or aliphatic polyisocyanate present in the adhesive promoter composition to form an adduct.

4. The adhesive promoter composition according to claim 2 , wherein the amount of aliphatic polyisocyanate is 0.1 to 20% by weight, based on the total weight of the adhesive promoter composition.

5. A substrate coated with an adhesive promoter composition according to claim 1 .

6. A method of treating an adhesive or sealant, the method comprising adding the adhesive promoter composition according to claim 1 to the adhesive or sealant.

7. The adhesive promoter composition according to claim 1 , a cohesive component of an area of a material to which the composition is applied exhibits greater than 75% cohesive fracture value at 50% relative humidity and room temperature.

8. The adhesive promoter composition according to claim 3 , wherein the amount of silane is 0.1 to 5% by weight, based on the total weight of the adhesive promoter composition.

Assignees

• Gaillard Geraldine
• Sika Tech Ag

Inventors

• Gaillard Geraldine

Classifications

• C08G18/4208

  containing aromatic groups · CPC title

• C08G18/42

  Polycondensates having carboxylic or carbonic ester groups in the main chain · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/776

  phosphorus · CPC title

• C09J175/06 Primary

  from polyesters · CPC title