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Adhesive defoamer knowledge

By : -- 2018-05-23 17:59:36

  At 9:14 on October 9, 2017, Mr. Long, a binder company in Zhejiang, contacted Dr. Zhang of Dongguan Defeng. According to Mr. Long's feedback, its polyurethane adhesives are prone to blistering and affect the adhesive properties. Finding solutions everywhere can not solve the problem, and finally asked Defeng to customize the adhesive defoamer he needs!


(The adhesive is used for fixing automotive glass)

  The company is developing a car glass adhesive for the driver's cab. Its main components are polyurethane resin, fumed silica, butanone, ethyl acetate and acetone. 

  Its polyurethane adhesive does not contain an adhesive defoamer ingredient. In the production of the adhesive, high-speed stirring, many bubbles are generated in the adhesive, and the bubbles affect uniform mixing and uniform stabilization of the adhesive components.


(The picture shows a serious foam problem in the adhesive)

  When its R&D engineers tried to apply such polyurethane adhesives to the bonding of cab glass, it was found that the presence of air bubbles seriously affected the adhesive properties of the adhesive. In a slight crash test after drying and curing, the glass is easily detached from the cab.

  Its engineers tried many antifoaming agents from other suppliers, but the effect was not obvious, and the R&D work stalled. Mr. Long was very distressed. Dr. Zhang from Devon’s R&D Department stated that to rapidly improve the adhesive performance, only one minor change needs to be made: adding Defoam's tailor-made adhesive defoamer

  TheDr. Zhang analyzed the composition of the adhesive, the production process and the principle of foaming, and then conducted a simulated defoaming experiment. Mr. Long customized the adhesive defoamer E-251N.


(Blister of adhesive causes automobile glass to drop on slight impact)

  E-251N is easy to disperse, can quickly eliminate polyurethane bubbles and prevent foam from regenerating in a wide range of pH and temperature, and it can well ensure the adhesive properties of polyurethane adhesives. Dr. Zhang’s assistant has sent free samples (postage to pay) and hopes that Mr. Long’s successful pilot test!


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