Adhesives
AssigneeYamaha Corporation
InventorsRitsuo Iwata, Hironao Nagashima, Tomohide Ogata, Kazunari Suzuki, Koji Nakajima
Life of this patent
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Abstract
An adhesive, comprising (A) a polymeric MDI, (B) modified polyvinyl acetate emulsion, (C) aqueous polyvinyl alcohol solution, and (D) a filler. Preferably, a mass ratio of A:B:C:D is 30:(60-160):(50-160):(10-140) provided that the aqueous polyvinyl alcohol solution (C) is in a concentration of 10% by mass
Claims31
An adhesive consisting essentially of (A) polymeric methylene diphenyl diisocyanate, (B) modified polyvinyl acetate emulsion, (C) aqueous polyvinyl alcohol solution, (D) a filler, and (E) a defoaming agent of modified silicone resins;
- wherein a mass ratio of A:B:C:D is 30:(60-160):(50-160):(10-140) provided that the aqueous polyvinyl alcohol solution (C) is in a concentration of 10% by mass, and (E) is contained in a concentration of 0.3 to 1.5 parts by weight per 100 parts by weight of the sum of (A), (B), (C), and (D).
An adhesive consisting essentially of (A) polymeric methylene diphenyl diisocyanate, (B) modified polyvinyl acetate emulsion, (C) aqueous polyvinyl alcohol solution, (D) a filler, and (E) a defoaming agent of modified silicone resins;
- wherein the polymeric methylene diphenyl diisocyanate (A) has an isocyanate group content of from 28% to 35% and a viscosity at 25° C. of from 100 to 250 mPa.s;
- and wherein a mass ratio of A:B:C:D is 30:(60-160):(50-160):(10-140) provided that the aqueous polyvinyl alcohol solution (C) is in a concentration of 10% by mass, and (E)is contained in a concentration of 0.3 to 1.5 parts by weight per 100 parts by weight of the sum of (A), (B), (C), and (D).
An adhesive consisting essentially of (A) polymeric methylene diphenyl diisocyanate, (B) modified polyvinyl acetate emulsion, (C) aqueous polyvinyl alcohol solution, and (D) a filler;
- wherein a mass ratio of A:B:C:D is 30:(64-156):(67-155):(12-33) provided that the aqueous polyvinyl alcohol solution (C) is in a concentration of 10% by mass.
An adhesive consisting essentially of (A) polymeric methylene diphenyl diisocyanate, (B) modified polyvinyl acetate emulsion, (C) aqueous polyvinyl alcohol solution, and (D) a filler;
- wherein the polymeric methylene diphenyl diisocyanate (A) has an isocyanate group content of from 28% to 35% and a viscosity at 25° C. of from 100 to 250 mPa.s;
- and wherein a mass ratio of A:B:C:D is 30:(64-156):(67-155):(12-33) provided that the aqueous polyvinyl alcohol solution (C) is in a concentration of 10% by mass.
Dependencies are inferred from the claim text.