Inventors:
Xiaobin Wang - North Andover MA, US
Daniel K. Doe - Hyde Park MA, US
Patricia M. Savory - Danvers MA, US
Kenneth A. Lambert - Billerica MA, US
Assignee:
Illinois Tool Works Inc. - Glenview IL
International Classification:
C09J 9/00
C09J 4/02
C09J 11/06
C09J 11/08
C09J 133/06
C09J 153/02
C09J 5/04
US Classification:
525 71, 525 83, 525 85, 525 87, 525 93, 525 94, 525259, 525268, 525308, 525309, 524560
Abstract:
Adhesive formulations having acrylate monomer or methacrylate monomer, or mixtures thereof, and having a reducing agent and an initiator (e. g. , peroxide). The formulations may include a chelating agent solution to improve storage stability and other properties. Further, the mole ratio of the initiator to the reducing agent may be adjusted to control weight loss of the adhesives during cure. Polyvinyl acetate or its derivatives may also be employed in the adhesive formulations to reduce weight loss during cure. Moreover, certain embodiments of the formulations include a toughening-agent copolymer having a glass transition temperature (of at least one domain) that is lower than −50 C. (−58 F. ). These toughening-agent copolymers may be added to the adhesive formulations to improve impact strength and other properties of the cured adhesives at lower temperatures, e. g. , −40 C.