US PATENT SUBCLASS 523 / 179
.~.~ Intumescent coating or ablative composition or process of preparing

Current as of: June, 1999
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523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
179.~.~ Intumescent coating or ablative composition or process of preparing

DEFINITION

Classification: 523/179

Intumescent coating or ablative composition or process of preparing:

(under subclass 1) Subject matter wherein a composition having utility as an ablative or an intumescent coating composition is claimed or solely disclosed, or to processes of preparation thereof.

(1) Note. For an explanation of patent placement referring to claimed or solely disclosed, see (in the class definition) the section of SEARCH THIS CLASS, SUBCLASS that refers to this subclass.

(2) Note. An intumescent coating composition is defined to be a composition which contains, in addition to a synthetic resin, an additive (such as a phosphate containing or a

carbonific or other carbon-yielding material) which intumesces (i.e., froths or puffs in such a manner that a considerably swollen solid cellular residue is produced, which is noncombustible) when heat or fire is applied thereto.

(3) Note. An ablative composition is one which tends to limit convective heat transfer from a high temperature source to a lower temperature source on a substrate to which the composition has been applied.

(4) Note. This subclass does not provide a for a fire-retardant composition which does not state the ability of the composition to intumesce or ablate.

(5) Note. A coating composition which is not solely disclosed as being ablative or intumescent is placed as appropriate in Classes 523 and 524 hereinbelow.

SEE OR SEARCH CLASS 106, Compositions: Coating or Plastic,

15.05+, for a coating composition (not containing a synthetic resin) which when applied to a surface forms a hard tenacious adherent film and which contains a fireproofing or biocidal agent.

252, Compositions,

601+, for a composition which is specialized and designed for use in treating materials to make them less combustible or more resistant to fire.

428, Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a single-layered shaped web or sheet or a plural-layered web or sheet which is intumescent.