22-08-2019 дата публикации
Номер: US20190255512A1
Принадлежит:
NOVOMER, INC.
Provided herein are absorbent polymers produced from beta-propiolactone, and methods and systems of producing such polymers. The beta-propiolactone may be derived from ethylene oxide and carbon monoxide. The absorbent polymer may be bio-based and/or biodegradable. The absorbent polymers may be used for diapers, adult incontinence products, and feminine hygiene products, as well as for agricultural applications. 1. A method of producing a polymer , comprising:{'sub': 2', '2, 'sup': +', '−, 'combining beta-propiolactone with a metal compound of formula M, MO, MOH, or MCH═CHCOO), or a combination thereof, to produce acrylic acid, a salt thereof, or a combination thereof; and'}polymerizing the acrylic acid, a salt thereof, or a combination thereof, with a polymerization initiator and optionally a cross-linker to produce the polymer.2. The method of claim 1 , wherein the polymerizing is performed neat or in a non-aqueous media.4. The method of claim 3 , wherein steps (c) and (d) are performed neat or in a non-aqueous media.5. The method of wherein the ionic initiator comprises a salt of an alkali metal claim 3 , a salt of an alkali-earth metal claim 3 , or a combination thereof.6. The method of wherein the ionic initiator comprises a carboxylate salt of an alkali metal claim 3 , a salt of an alkali-earth metal claim 3 , or a combination thereof.7. The method of wherein the ionic initiator is a salt of an alkali metal.8. The method of wherein the ionic initiator has a structure of formula CH═CHCOZ claim 3 , wherein Z is an alkali metal claim 3 , an alkali earth metal claim 3 , ammonium claim 3 , a quaternary ammonium cation claim 3 , or phosphonium.9. The method of claim 8 , wherein the quaternary ammonium cation is a lower alkyl quaternary ammonium cation.10. The method of wherein the ionic initiator is sodium acrylate claim 3 , or potassium acrylate claim 3 , or a combination thereof.11. The method of wherein the ionic initiator is a methacrylate.12. The method of ...
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