PATENT CLAIM ANALYSIS

Application Number: 16096305
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-05
Patent Classification: ["560", "218000"]

Abstract:
The invention relates to the use of 2,6,-di-tert-butyl-4-methylphenol at a moiety of 25 to 200 ppm for stabilizing N,N-dimethylaminoethyl acrylate in respect of discoloring effects. The invention also relates to an N,N-dimethylaminoethyl acrylate stabilized in said manner and to a method for producing the same.

Claim (Index 5):
The process of  claim 4 , comprising the following steps:\n a) transesterifying a light acrylate selected from the group consisting methyl acrylate and ethyl acrylate, with dimethylaminoethanol in the presence of a transesterification catalyst and at least one polymerization inhibitor, a corresponding azeotropic mixture of light acrylate/light alcohol being drawn off continuously during the reaction; b) conveying a crude reaction mixture to a first distillation column C1, referred to as tailing column, under reduced pressure, the crude reaction mixture comprising the desired N,N-dimethylaminoethyl acrylate with, as light products, dimethylaminoethanol and unreacted light acrylate and, as heavy products, the catalyst, the polymerization inhibitor(s) and heavy reaction by-products, to obtain:\n at the top, a stream composed essentially of N,N-dimethylaminoethyl acrylate and light products, comprising a minor fraction of heavy products but devoid, or substantially devoid, of catalyst; and \n at the bottom, a stream composed of heavy products with a minor fraction of N,N-dimethylaminoethyl acrylate and the catalyst; then \n c) conveying the top stream from the first distillation column C1 to a second distillation column C2, referred to as topping column, under reduced pressure, to obtain:\n at the top, a stream composed of light products with a minor fraction of N,N-dimethylaminoethyl acrylate; and \n at the bottom, N,N-dimethylaminoethyl acrylate containing traces of light products, heavy reaction by-products and the polymerization inhibitor(s); then \n d) conveying the bottom stream from the second distillation column C2 to a third distillation column C3, referred to as rectification column, under reduced pressure, into the top of which 25 to 200 ppm of 2,6-di-tert-butyl-4-methylphenol is introduced, to obtain:\n at the top, a gaseous stream of purified N,N-dimethylaminoethyl acrylate that is stabilized with respect to coloration which is subsequently condensed; and \n at the bottom, a stream consisting essentially of the polymerization inhibitor(s).

Metadata:
- Claim Count in Document: 5.0
- Percentile: 97.0
- Lexical Diversity: 1.51429
- Patent Class: 560.0
- Transitional Phrase Type: half
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14346802', '15546074', '14370223', '10479962', '12468585']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7502692423610402
- 35 USC 102 Novelty (BERT): 0.5225552256257198
- Combined Prediction Score: 0.7274978406875081
- Mean Citation Score: 236.028602
- Max Citation Score: 244.64484
- Similarity Product: 192.6487473482036

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test