Thermosettable compositions useful for producing structural adhesive foams
First Claim
Patent Images
1. An expandable thermosettable composition useful for producing a structural adhesive foam comprising:
- (a) at least one adduct of at least one isocyanate resin and at least one epoxy resin bearing at least one isocyanate-reactive functional group per molecule;
(b) one or more blowing agents; and
(c) one or more epoxy curatives.
1 Assignment
0 Petitions
Accused Products
Abstract
The use of an adduct of an isocyanate resin and an isocyanate-reactive epoxy resin in an expandable thermosettable composition helps to reduce the tackiness of the composition and also increases its dimensional stability, as compared to compositions in which only non-adducted epoxy resins are present.
56 Citations
31 Claims
-
1. An expandable thermosettable composition useful for producing a structural adhesive foam comprising:
-
(a) at least one adduct of at least one isocyanate resin and at least one epoxy resin bearing at least one isocyanate-reactive functional group per molecule;
(b) one or more blowing agents; and
(c) one or more epoxy curatives. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 29, 30)
-
-
21. An expandable thermosettable composition useful for producing a structural adhesive foam comprising:
-
(a) at least one adduct of at least one isocyanate resin having at least two isocyanate groups per molecule and at least one liquid or semi-solid epoxy resin bearing at least one hydroxyl group per molecule, wherein said at least one liquid or semi-solid epoxy resin is a glycidyl ether of bisphenol A;
(b) one or more blowing agents;
(c) one or more epoxy curatives; and
(d) one or more additional components selected from the group consisting of;
(i) urethane catalysts;
(ii) hollow glass microspheres;
(iii) rubbers;
(iv) adhesion promoters;
(v) fillers;
(vi) thixotropic agents; and
(vii) epoxy resins other than said at least one liquid or semi-solid epoxy resin adducted with said isocyanate resin. - View Dependent Claims (22, 23, 24, 25, 26, 27)
-
-
28. An expandable thermosettable composition useful for producing a structural adhesive foam comprising:
-
(a) 40 to 70 wt % of one or more epoxy resins;
(b) 0.5 to 8 wt % of one or more blowing agents;
(c) 0.5 to 5 wt % of one or more isocyanate resins;
(d) 1 to 10 wt % of one or more epoxy curatives;
(e) 1 to 10 wt % of one or more rubbers;
(f) 0.01 to 1 wt % of one or more adhesion promoters;
(g) 0.01 to 0.5 wt % of one or more urethane catalysts;
(h) 0 to 1 wt % of one or more blowing agent accelerators;
(i) 10 to 40 wt % of hollow glass microspheres;
(j) 1 to 20 wt % of one of more fillers; and
(k) 0.1 to 5 wt % of one or more thixotropic agents;
wherein at least a portion of the epoxy resins are liquid or semi-solid epoxy resins having at least one isocyanate-reactive functional group per molecule which have been reacted with at least a portion of the isocyanate resins to form an adduct.
-
-
31. A method of making an expandable thermosettable composition useful for producing a structural adhesive foam, said method comprising:
-
(a) combining at least one liquid or semi-solid epoxy resin bearing at least one isocyanate-reactive functional group, one or more blowing agents, and one or more epoxy curatives to form a uniform mixture; and
(b) reacting at least a portion of the liquid or semi-solid epoxy resin in said mixture with at least one isocyanate resin to form an adduct.
-
Specification