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High solids preparation of crosslinked polymer particles

A technology of polymer particles and polymerization reaction, which is used to predict whether the selection of reaction conditions will lead to the formation of gels, and whether the selection of reaction conditions will lead to the formation of gels, which can solve the problem of reducing water fastness and scratch resistance, etc. question

Inactive Publication Date: 2006-05-10
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the use of surfactants to prepare cross-linked polymers reduces the water fastness and scratch resistance of coating compositions into which cross-linked polymers are incorporated

Method used

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  • High solids preparation of crosslinked polymer particles
  • High solids preparation of crosslinked polymer particles
  • High solids preparation of crosslinked polymer particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Example 1: Prediction method

[0151] Polymerization to form cross-linked polymer particles was simulated at about 45% solids by weight as follows:

[0152] The simulated reaction conditions included a total reactant feed of 20 wt% acrylic acid (AA), 35 wt% butyl acrylate (BA), 35 wt% methyl methacrylate (MMA), and 10 wt% TMPTA, with Alcohol as a solvent.

[0153] A and C values ​​can be determined from the total reactant feed as described below. The weight basis of the total feed can be converted to a mole basis (assuming 100 g of total monomer) as follows.

[0154] Mole AA = 20 / 72 = 0.2778

[0155] Mole BA = 35 / 128 = 0.2734;

[0156] Molar MMA = 35 / 100 = 0.35; and

[0157] Mole TMPTA = 10 / 298 = 0.0336.

[0158] The sum of these values ​​gives a total moles (assuming 100 g total monomer) of 0.9348. Therefore, the mole fractions of the various reactive monomers and crosslinking monomers are calculated as follows:

[0159] Mole fraction AA=0.2778 / 0.9348=0.2972; ...

Embodiment 2-29

[0198] Examples 2-29: Polymerization

[0199] All examples were performed using a 4 neck 3000 mL round bottom flask as the reaction vessel. The flask is equipped with a water-cooled reflux condenser with a nitrogen purge gas outlet connected to I 2 Thermocouple for R Tow TC Adapter Type TCA / 1 Temperature Controller, by Fisher Maxima TM A glass C-stirrer controlled by a digital stirrer motor and a monomer feed line controlled by a QG-50FMI pump fitted with 1 / 4 inch tubing. The contents of the reaction vessel were heated using a heating mantle connected to a 120V Variac Type 3PN1010 (from Staco Energy Products) or Type 3PN16C (from Superior Electric Company). All reactants used were weighed using a Metler PC 8000 balance.

[0200] Table 1 shows the formula, feed rate and polymerization reaction time used in each embodiment.

[0201] For each of Examples 2-29, the following basic procedure was used.

[0202] The reaction vessel was charged with a heel charge and heated to 79...

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Abstract

A method of preparing crosslinked polymer particles at high solids content (ie, greater than 40% by weight). Also provided is a method of predicting whether a choice of reaction conditions for preparing crosslinked polymer particles will lead to gel formation and a method of predicting whether a choice of reaction conditions will result in gel formation.

Description

technical field [0001] The present invention relates to a process for the preparation of crosslinked polymer particles under conditions of high solids content (ie greater than 40% by weight). The present invention also provides methods for predicting whether the choice of reaction conditions for the preparation of crosslinked polymer particles will lead to the possibility of gel formation. The invention also provides methods for predicting whether a choice of reaction conditions will result in gel formation. technical background [0002] Crosslinked polymer particles with an average particle size < 100 nm are attractive for a variety of applications. Compared with conventional compounds, such crosslinked polymer particles often have high mechanical strength, higher controllability of transportability, higher tunability of material properties, and high dimensional stability. Accordingly, these crosslinked polymer particles are useful in a variety of applications includin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/00C08F2/06C08F220/10C08J3/12
CPCC08F220/06C08F220/14C08F220/1804C08F2/22C08F20/06
Inventor W·德文波特S·J·菲茨沃特E·G·伦德奎斯特
Owner ROHM & HAAS CO