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Method of transmitting ultrasonic impulses to surface using transducer coupling agent

  • US 4,002,221 A
  • Filed: 11/15/1974
  • Issued: 01/11/1977
  • Est. Priority Date: 09/19/1972
  • Status: Expired due to Term
First Claim
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1. In a method of transmitting ultrasonic impulses to a surface in contact with transducer means with a conductivity gap therebetween, the improvement comprising applying a transducer coupling agent to said conductivity gap formed of a composition consisting essentially of:

  • about 1/20th of 1 wt% to 10 wt% of a long chainwater soluble ionic polymeric thickener having a Brookfield Viscosity (CPS) of approximately 1000 to 100,000 at 1 wt% concentration in H2 O and neutralized with an alkaline agent, said thickener being selected from the group consisting of a copolymer of methyl vinyl ether and maleic anhydride, carboxy polymethylene polymer and mixtures thereof,about 1/1000 of 1 wt% to 3 wt% of a hydroxy alkyl cellulose polymer as an auxiliary thickener,about 10% to 25% by weight of a polyalkylene glycol humectant, said alkylene group containing 2 to 10 carbon atoms,up to about 5 wt% of an alkali metal salt of a weak organic acid,up to about 5 wt% of a weak organic acid,and the balance essentially water, said gel having a pH of about 3.5 to 11.5.

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