Ammonia → POLY(VINYL ACETATE-CO-CROTONIC ACID)

HRID 434533Notes

Reaction equation

HRID 434533 reaction equation
N.[C:2]([OH:7])(=[O:6])/[CH:3]=[CH:4]/[CH3:5].[C:8]([O:11][CH:12]=[CH2:13])(=[O:10])[CH3:9]>>[C:8]([O:11][CH:12]=[CH2:13])(=[O:10])[CH3:9].[C:2]([OH:7])(=[O:6])/[CH:3]=[CH:4]/[CH3:5]

Participants

4

Reactant 3

HCID 222Ammonia4×HCID 7904Vinyl AcetateHCID 637090Crotonic Acid4×

Product 1

HCID 6440878POLY(VINYL ACETATE-CO-CROTONIC ACID)

Procedure

A series of vinyl acetate-crotonic acid interpolymers is prepared by the method of example 1 with variation in the following parameters; acid monomer content, polyvinyl alcohol content, the amount of ammonia added with crotonic acid during the suspension polymerization, and the amount of ammonia added for the final pH adjustment at the stage of latex formation. The results are presented in table 1. In examples 9, 10, 11 and 14, all the crotonic acid is added initially; however ammonia is added incrementally during the suspension polymerization step. In example 14, ammonia is also added to the initial polymerization mixture. Because of low conversion of vinyl acetate, the crotonic acid content of the interpolymer is generally abiout 15 percent higher than theoretical based on the crotonic acid charged to the reaction kettle.

Workup

  1. custompolymerization mixture
  2. additioncharged to the reaction kettle

Sources & evidence

ORD record
ord-47ef6f7c20a9417c838544b887a8fd47
Source dataset
uspto-grants-1983_08
Patent number
US04397883

Reaction notes

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