Acrylic Acid → Prop-2-enoic acid--2-(dimethylamino)ethyl 2-methylprop-2-enoate (1/1)

HRID 471329Notes

Reaction equation

[C:1]([O:6][CH2:7][CH2:8][N:9]([CH3:11])[CH3:10])(=[O:5])[C:2]([CH3:4])=[CH2:3].[C:12]([OH:16])(=[O:15])[CH:13]=[CH2:14]>O>[C:1]([O:6][CH2:7][CH2:8][N:9]([CH3:11])[CH3:10])(=[O:5])[C:2]([CH3:4])=[CH2:3].[C:12]([OH:16])(=[O:15])[CH:13]=[CH2:14]

Participants

Conditions

Temperature: 71 °C

Procedure

A fluid loss control additive useful in the present invention was prepared as follows. First, a polymer was prepared by mixing 45.0 g of dimethylaminoethyl methacrylate, 6.8 g acrylic acid, 372.0 g of water and sparging with nitrogen for 30 minutes. Thereafter, the pH was adjusted to approximately 5.3 with 5.7 mL of concentrated sulfuric acid, followed by the addition of 0.2 mL of 2-mercaptoethanol and 1.3 g of 2,2′-azo bis(2-amidinopropane) dihydrochloride. The resulting solution was then heated to 71° C., with stirring, and held for 18 hours to produce poly(dimethylaminoethyl methacrylate/acrylic acid).

Workup

customA fluid loss control additive useful in the present invention was prepared
customFirst, a polymer was prepared
customsparging with nitrogen for 30 minutes
additionfollowed by the addition of 0.2 mL of 2-mercaptoethanol and 1.3 g of 2,2′-azo bis(2-amidinopropane) dihydrochloride

Sources & evidence

ORD record: ord-8399caab00c44fadb57c251d474a0c03
Source dataset: uspto-grants-2014_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08631869B2

Reaction notes

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