One-Part Type Heat Curable Composition

• US 20090163649A1
• Filed: 02/09/2007
• Published: 06/25/2009
• Est. Priority Date: 02/09/2006
• Status: Abandoned Application

• Current Assignee: Sika Technology Ag (Compagnie de Saint-Gobain SA)
• Original Assignee: Sika Technology Ag (Compagnie de Saint-Gobain SA)
• Inventors: Sugiyama, Akira, Sasaki, Toshihide
• Application Number:
  US12/223,661
• Publication Number:
  US 20090163649A1
• Time in Patent Office: Days
• US Class Current: 524/589
• 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 18/3225 Polyamines
• CPC Class Codes: C08G 18/4845 containing oxypropylene or higher oxyalkylene end groups
• CPC Class Codes: C08G 18/752 containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
• CPC Class Codes: C09J 175/04 Polyurethanes
• CPC Class Codes: C09K 3/1021 Polyurethanes or derivatives thereof

Abstract

To provide a one-part type heat curable composition which exhibits superior adhesion properties, is easily cured by heating, does not soften even if the composition is baked at increased temperature, is completely cured by means of moisture in the atmosphere even if curing is not sufficient due to heating temperature, heating period, and the like, and exhibits increased adhesiveness with respect to a coating film after the composition is cured. A one-part type heat curable composition comprising: (A) a prepolymer having a urethane bond(s), and an isocyanate group(s) at a chain end or pendent position(s) thereof; (B) an amine-adduct type latent hardener; and (C) a moisture latent hardener.

Claims

1. A one-part type heat-curable composition comprising:

(A) a prepolymer having a urethane bond(s), and an isocyanate group(s) at a chain end(s) or a pendent position(s) thereof;

(B) an amine-adduct type latent hardener; and

(C) a moisture latent hardener

2. The composition according to claim 1, wherein the prepolymer (A) comprises a polyether structure(s).

3. The composition according to claim 1, wherein the content of the prepolymer (A) is 15 to 80 wt % relative to the total weight of the composition.

4. The composition according to claim 1, wherein the content of the amine-adduct type latent hardener (B) is 0.1 to 10 wt % relative to the total weight of the composition.

5. The composition according to claim 1, wherein the content of the moisture latent hardener (C) is 0.1 to 10 wt % relative to the total weight of the composition.

6. A sealing product or an adhesive comprising the composition of claim 1.