US PATENT SUBCLASS 525 / 398
.~.~ Solid polymer derived from aldehyde, aldehyde derivative, or liquid polymer thereof as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
398.~.~ Solid polymer derived from aldehyde, aldehyde derivative, or liquid polymer thereof as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof {4}
399  DF  .~.~.~> Mixed with -N=C=X-containing reactant or polymer derived therefrom (X is a chalcogen)
400  DF  .~.~.~> Mixed with carboxylic acid or derivative reactant or polymer derived therefrom
401  DF  .~.~.~> Mixed with ethylenically unsaturated reactant or polymer derived therefrom
402  DF  .~.~.~> Solid polymer derived from aldehyde or derivative containing halogen

DEFINITION

Classification: 525/398

Solid polymer derived from aldehyde, aldehyde derivative, or low molecular weight polymer thereof as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:

(under subclass 50) Subject matter involves processes of mixing solid polymer derived from an aldehyde, aldehyde derivative, or low molecular weight polymers thereof as sole reactants wherein none of the reactants contains plural methylol groups or is a derivative thereof, with an additional solid polymer, with specified polymer-forming ingredients, with a specified intermediate condensation product, with a chemical treating agent or with ethylenic agent; processes of reacting these mixtures or products resulting from the mixing or reacting processes.

(1) Note. This subclass includes homo- or copolymers of only aldehyde or aldehyde derivative reactants.

(2) Note. This subclass includes solid polymers prepared from a multiplicity of aldehyde or aldehyde derivative reactants.

(3) Note. An aldehyde derivative for purposes of this subclass includes:

(a)

Compounds having X-CH2OH group wherein X is other than carbon or hydrogen. Included herein

are paraformaldehyde, methylol derivative of urea, etc.

(b) Heterocyclic compounds having only carbon and oxygen as ring atoms in an alternating manner and in equal amount, i.e., (O-)n. Included herein is trioxane.

(c) Hexamethylenetetramine or derivative e.g., as illustrated below; a derivative of this type requires the basic ring structure of hexamethylenetetramine but wherein the hydrogen atoms may have been replaced by other atoms. [figure]

(4) Note. Compounds having a methylol group (-CH2OH) bonded to atoms other than carbon, oxygen, or hydrogen are regarded for this subclass as being a mixture of two compounds one of which is formaldehyde. For instance, a methylol derivative of melamine is regarded as being a mixture of melamine and formaldehyde. Methylol urea is regarded as being a mixture of formaldehyde and urea.

(5) Note. Solid paraformaldehyde polymers will be regarded as monomeric formaldehyde.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for a definition the terms "methylol", "methylol derivative", "aldehyde", "specified polymer-forming ingredients", or "specified intermediate condensation product".

526, Synthetic Resins or Natural Rubbers,

315, for a polymer derived from an ethylenically unsaturated aldehyde as sole reactant or for an interpolymer derived from only ethylenically unsaturated reactants wherein at least one of the ethylenically unsaturated reactants contains an aldehyde group.

528, Synthetic Resins or Natural Rubbers,

403, for heterocyclic oxygen-containing reactants such as dioxolane, dioxepan, etc.; and subclasses 480+ for processes of treating a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. Subclasses 480+ also provide for processes of admixing with a broadly claimed nonreactant material.