Unlock instant, AI-driven research and patent intelligence for your innovation.
Process for low-concentration, inverse emulsion polymerization of weakly neutralized polymers and inverse emulsions obtained
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An inverse emulsion, polymer technology, applied in the field of polymers that can be obtained by such methods, can solve problems of stability, instability, precipitation, etc.
Active Publication Date: 2015-11-18
S P C M SA
View PDF18 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
This is because, as shown in the prior art, especially in patent US5216070, the preparation of such polymers directly via inverse emulsion polymerization without neutralization of the monomers with weak acid functional groups used leads to precipitation / instability problem
In fact, as shown in particular in document US3284393, the preparation of polyacrylic acid latexes via such methods (as described in detail in Example 3) poses stability problems, and the obtained latex must be flocculated and concentrated with hydrochloric acid in order to obtain the polyacrylic acid latex by filtration. polymer
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0081] Add the ingredients of the aqueous phase to a 1 L beaker with magnetic stirring:
[0092] - 25 grams of polymeric stabilizer (Hypermer 1083)
[0093] The aqueous phase was gradually transferred into the organic phase. The pre-emulsion thus formed was then subjected to strong shear (UltraTurrax, IKA) for 1 min.
[0094] The inverse emulsion was then degassed by simple nitrogen bubbling for 30 minutes.
[0095] An aqueous solution containing 1.0% by weight ...
Embodiment 2
[0098] Add the ingredients of the aqueous phase to a 1 L beaker with magnetic stirring:
[0114] Next, the preparation of the organic phase and the remainder of the preparation process were carried out according to Example 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The present invention relates to a process for preparing a polymer by polymerization of an aqueous solution of one or more monomers in water-in-oil inverse emulsion, in which one or more of the monomers used comprise(s) at least one acid function, the molar percentage of monomers bearing at least one weak acid function relative to all the monomers used being at least 30%, wherein: i) the polymerization is carried out with a concentration of all the monomers in aqueous solution which falls within the range of from 1.3 mmol to 3.6 mmol per gram of aqueous solution, ii) during the polymerization, at most 20% of the acid functions present on the monomers which have at least one acid function are in neutralized form, and also to the polymers which can be obtained by means of such a process.
Description
technical field [0001] The present invention relates to the technical field of synthetic polymers comprising weak acid functional groups, generally used as thickeners and / or stabilizers for aqueous media, and more precisely to the manufacture of at least one monomer bearing weak acid functional groups via inverse emulsion polymerization. Processes for obtaining polymers, and also polymers obtainable by such processes. Background of the invention [0002] Various types of polymers formed from at least one monomer containing weak acid functionality are used as thickeners and / or stabilizers in different types of applications. For example, patents FR2810545 and FR2873126 or patent US3724547 may be mentioned. Most often, to obtain the desired thickening and / or stabilizing effect, such polymers are prepared directly as polymers whose acid functions are at least partially neutralized, most often greater than 50%, or even 100%. In fact, it is known from the prior art that synthet...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More