Minnesota Mining and Manufacturing Company

William A Driscoll

Kurt C Melancon

Jerald K Rasmussen

Steven M Heilmann

A method of vibrationally damping article, comprising applying to the article a vibration damper comprising a radiation curable vibration damping material which comprises (a) from about 5 parts to about 95 parts by weight acrylic monomer and (b) correspondingly, from about 95 parts to about 5 parts by weight of a silicone adhesive, wherein the sum of (a) plus (b) equal 100 parts by weight, whereby the vibration damper vibrationally damps the article.

Silicone/acrylate vibration dampers

A device for providing the modulus and loss factor values of a damping material based upon temperature and frequency which includes (i) an insert having (a) temperature isotherms on one side, and (b) graphs of the modulus and loss factor values for the damping material as a variable of temperature and frequency on the other side, and (ii) a sleeve for the insert which has (aa) a temperature isotherm display window for displaying the temperature isotherms on the insert, (bb) a frequency scale proximate the temperature isotherm display window, and (cc) a means for highlighting a modulus value and a loss factor value from the modulus and loss factor graphs provided on the insert. The device is employed to obtain the modulus and loss factor values of a damping material at a particular frequency and temperature by (i) a coupling the temperature and frequency values of concern by sliding the insert within the sleeve until the isotherm representing the temperature of concern physically contacts the frequency value of concern, and (ii) reading the modulus value and loss factor value highlighted by the highlighting means.

Mechanical device for determining the modulus and loss factor of a

A constrained-layer construction comprising a stiff layer or substrate and a layer of a viscoelastic polymer which is the reaction product of (a) 25 to 75 weight percent of an acryloyl or methacryloyl derivative of at least one oligomer, said oligomer having a glass transition temperature of less than 25.degree. C. and a molecular weight per oligomer of 600 to 20,000, and (b) 75 to 25 weight percent of a copolymerizable monomer whose homopolymer has a glass transition temperature of at least 50.degree. C., the copolymer being suitable for damping vibrations at relatively high temperatures, e.g., 50.degree.-150.degree. C., is disclosed. Also included is a process for damping vibrations in component parts of devices used in automotive, aerospace, and computer industries.

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Woodbury, MN, United States of America

William A Driscoll