A process for producing non-scattering hollow plastic balloons

Details A process for producing non-scattering hollow plastic balloons A process for producing non-scattering hollow plastic balloons

C - Chemistry, Metallurgy

08

J

C08J 9/16 (2006.01) B01J 13/02 (2006.01) C08J 9/32 (2006.01)

Patent

CA 2138342

A process for producing non-scattering hollow plastic balloons which comprises: (a) heating a mixture (A) of non-foamed plastic balloons and a first wetting agent, which is a plasticizer, to a temperature from 40°C. to a temperature which is 40°C. below an exit temperature of a heat exchanger, (b) contacting the mixture (A) with a second wetting agent being heated to a temperature equal too or above the foaming starting temperature of the non-foamed plastic balloons, wherein a ratio of the mixture (A) to the second wetting agent (B) is 1:0.5 to 1:1.5, the contacting being within 1 minute after heating the mixture (A) by the heat exchanger to a temperature ranging from 20° to 50°C, below the foaming starting temperature of the non-foamed plastic balloons, (c) foaming the non-foamed plastic balloons, and (d) cooling the resultant mixture from step (c) containing the foamed plastic balloons. Non-scattering foamed plastic balloons can thus be obtained simultaneously with the foaming. The present process needs a smaller amount of a plasticizer than the conventional process of wetting foamed plastic balloons with a plasticizer.

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