| 摘要 |
<p>Alkylamine polyether surface active agent compositions and methods for using are described. The instant compositions are low foaming, and pH sensitive and are generally of the structure: <IMAGE> in which (a) R1 may be hydrogen or alkyl; if R1 is hydrogen then R2, R3 and R4 must be alkyl having a total number of carbon atoms falling in the range of 7 to 23; if R1 is alkyl, then R2, R3 and R4 may be alkyl or hydrogen, the total number of carbon atoms in R1+R2+R3+R4 falling in the range of 7 to 36 (preferably about 10 to 20); (b) The -(C2H4O)m- segment must be a poly(oxyethylene) homogeneous chain or "block" polymer (i.e., a homopolymer), m having an average value in the range of 1 to 15, preferably 5 to 13; and (c) Y is selected from the group consisting of: (1) homogeneous poly(oxypropylene) chain (PO) "block" polymer or residue (i.e., a homopolymer), of the structure -(C3H6O)nH, n having a value in the range of 1 to 50, preferably 6 to 30; (2) hydrophobic end cap (e.g., -CH2- phi ); and (3) hydrophobic end capped polyoxypropylene residue. A particularly preferred class of surfactants of the instant invention constitutes 1,1,1-trialkylmethylamine ethyleneoxy(EO)-propyleneoxy(PO) polyethers having from 1 to 15 moles of ethyleneoxide residue and from 1 to 50 moles of propyleneoxide per mole of alkylmethylamine. The methods of the instant invention generally relate to the production of paper from secondary fiber. Unexpectedly, the compositions of the instant invention are found to be applicable in the common methods employed very pH sensitive, size-safe and to produce paper products from secondary fiber.</p> |
