High-strength acrylic adhesives incorporating polyvinyl butyral
AssigneeIllinois Tool Works Inc.
InventorsGregory Schulz, Maxwell VanRaaphorst
Life of this patent
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Abstract
A two-part formulation of a high strength acrylic adhesive that includes a Part A and Part B. The Part A includes at least one curable monomer of: Part A acrylate monomer, methacrylate monomer, acrylic acid monomer, methacrylic acid monomer, or a combination thereof; a Part A impact modifier; and a Part A adhesion promoter. A Part B includes impact modifier, a Part B adhesion promoter, and an induction agent. A polyvinyl acetal resin is present in at least one of Part A or Part B, and present from 1 to 30 total weight percent. A process of applying the resulting adhesive to bond substrates and a resulting structure are also provided.
Claims19
A two-part formulation of a high strength acrylic adhesive comprising:
- a Part A comprising at least one curable monomer of:
- at least one of:
- Part A acrylate monomer, methacrylate monomer, acrylic acid monomer, methacrylic acid monomer, or a combination thereof;
- a Part A impact modifier;
- a Part A adhesion promoter;
- and
- a Part B comprising a Part B impact modifier;
- and a Part B adhesion promoter, and an induction agent;
- polyvinyl acetal resin that is greater than 60 percent polyvinyl butyral (PVB) as measured by monomer subunit percentage present in at least one of Part A or Part B, said polyvinyl acetal resin present upon mixing of said Part A and said Part B in an amount of from 1 to 30 total weight percent and having a peak exotherm time during cure of less than 7.65 minutes.
A two-part formulation of a high strength acrylic adhesive comprising:
- a Part A comprising at least one curable monomer of:
- at least one of:
- Part A acrylate monomer, methacrylate monomer, acrylic acid monomer, methacrylic acid monomer, or a combination thereof;
- a Part A impact modifier;
- a Part A adhesion promoter;
- and
- a Part B comprising a Part B impact modifier;
- and a Part B adhesion promoter, and an induction agent;
- polyvinyl acetal resin that is 70 to 88 percent polyvinyl butyral (PVB) as measured by monomer subunit percentage present in at least one of Part A or Part B, said polyvinyl acetal resin present upon mixing of said Part A and said Part B in an amount of from 1 to 30 total weight percent.
A two-part formulation of a high strength acrylic adhesive comprising:
- a Part A comprising at least one curable monomer of:
- at least one of:
- Part A acrylate monomer, methacrylate monomer, acrylic acid monomer, methacrylic acid monomer, or a combination thereof;
- a Part A impact modifier;
- a Part A adhesion promoter;
- and
- a Part B comprising a Part B impact modifier;
- and a Part B adhesion promoter, and an induction agent;
- polyvinyl acetal resin that is greater than 60 percent polyvinyl butyral (PVB) as measured by monomer subunit percentage present in at least one of Part A or Part B, said polyvinyl acetal resin present upon mixing of said Part A and said Part B in an amount of from 1 to 30 total weight percent, and said polyvinyl acetal resin having secondary amounts of polyvinyl acetal, ethylene vinyl acetate, polyvinyl acetate, polyvinyl hydroxide, and mixtures thereof.
Dependencies are inferred from the claim text.