CPC Main Group
C08J 9/00 Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof (mechanical aspects of shaping of plastics or substances in a plastic state for the production of porous or cellular articles B29C)
20 direct subcodes
Child Classifications
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- C08J 9/02 using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules
- C08J 9/04 using blowing gases generated by a previously added blowing agent
- C08J 9/16 Making expandable particles
- C08J 9/22 After-treatment of expandable particles; Forming foamed products
- C08J 9/24 by surface fusion and bonding of particles to form voids, e.g. sintering (of expandable particles C08J9/232)
- C08J 9/26 by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
- C08J 9/28 by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
- C08J 9/30 by mixing gases into liquid compositions or plastisols, e.g. frothing with air
- C08J 9/32 from compositions containing microballoons, e.g. syntactic foams
- C08J 9/33 Agglomerating foam fragments, e.g. waste foam
- C08J 9/34 Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
- C08J 9/35 Composite foams, i.e. continuous macromolecular foams containing discontinuous cellular particles or fragments
- C08J 9/36 After-treatment (C08J9/22 takes precedence)