Document ID: chunk:federal_register_of_legislation:F2024C00679:clause:2_2:p1
Version: federal_register_of_legislation:F2024C00679
Segment Type: clause
Provision Reference: sch 2 cl 2 (pt 1/2)
Character Range: 415252–418328

2  Number average molecular weight greater than or equal to 1,000 g/mol and less than 10,000 g/mol
 (1) For the purposes of subparagraph 1(a)(i), the characteristics are set out in subclauses (2), (3) and (4) of this clause.

General
 (2) The polymer must:
 (a) have less than 10% (by mass) of molecules with a molecular weight that is less than 500 g/mol; and
 (b) have less than 25% (by mass) of molecules with a molecular weight that is less than 1,000 g/mol.

Polymers that include moderate concern reactive functional groups and do not include high concern reactive functional groups
 (3) If the polymer:
 (a) includes moderate concern reactive functional groups; and
 (b) does not include high concern reactive functional groups;
the polymer must have a combined functional group equivalent weight of 1,000 g/mol or more (taking into account all moderate concern reactive functional groups included in the polymer).
Note: For the meaning of reactive functional group, see section 5.

Polymers that include high concern reactive functional groups
 (4) If the polymer includes high concern reactive functional groups, the polymer must have a combined functional group equivalent weight of 5,000 g/mol or more (taking into account any moderate concern reactive functional groups, and all high concern reactive functional groups, included in the polymer).
Note: For the meaning of reactive functional group, see section 5.

Reactive functional groups
 (5) For the purposes of subclauses (3) and (4), each of the following reactive functional groups is a moderate concern reactive functional group:
 (a) acid anhydrides;
 (b) acid halides;
 (c) aldehydes;
 (d) aldimines;
 (e) alkoxysilanes (with alkoxy greater than C2‑alkoxysilane);
 (f) allyl ethers;
 (g) conjugated olefinic groups not contained in naturally occurring fats, oils and carboxylic acids;
 (h) cyanates;
 (i) epoxides;
 (j) hemiacetals;
 (k) ketimines;
 (l) methylol‑amides;
 (m) methylol‑amines;
 (n) methylol‑ureas;
 (o) unsubstituted positions ortho or para to phenolic hydroxyl.
Note: For the meaning of reactive functional group, see section 5.
 (6) For the purposes of subclauses (3) and (4), each of the following reactive functional groups is a high concern reactive functional group:
 (a) alkoxysilanes (with alkoxy of C1‑ or C2‑ alkoxysilane);
 (b) alpha lactones;
 (c) amines;
 (d) aziridines;
 (e) azo groups;
 (f) beta lactones;
 (g) carbodi‑imides;
 (h) disulfides;
 (i) halosilanes;
 (j) hydrazines;
 (k) hydrosilanes;
 (l) isocyanates;
 (m) isothiocyanates;
 (n) pendant acrylates;
 (o) pendant methacrylates;
 (p) trithiocarbonates;
 (q) vinyl sulfones;
 (r) any other reactive functional group that is not a low concern reactive functional group or a moderate concern reactive functional group.
Note: For the meaning of reactive functional group, see section 5.
 (7) For the purposes of paragraph (6)(r), each of the following reactive functional groups is a low concern reactive functional group:
 (a) aliphatic hydroxyls;
 (b) blocked isocyanates (including ketoxime‑blocked isocyanates);