阅读说明：本技术 组分加成聚合 (Component addition polymerization ) 是由 A·M·萨沃 F·T·利普福德 T·琼斯 M·奥斯特兰德 于 2018-10-24 设计创作，主要内容包括：提供了一种制备聚合物珠粒集合体的方法,其中所述珠粒包括(i)基于所述珠粒的重量,75至99重量％的单官能乙烯基单体的聚合单元,和(ii)基于所述珠粒的重量,1至25重量％的多官能乙烯基单体的聚合单元,其中所述方法包括(a)提供包含引发剂、单官能乙烯基单体和多官能乙烯基单体的单体液滴的水性悬浮液；(b)引发所述单体液滴中的单体的聚合；(c)在所述单体液滴中的单体的聚合发生的同时,将单体进料溶液加入到所述悬浮液中。(A method of preparing a collection of polymeric beads is provided, wherein the beads comprise (i) 75 to 99 wt% polymerized units of a monofunctional vinyl monomer, based on the weight of the beads, and (ii) 1 to 25 wt% polymerized units of a multifunctional vinyl monomer, based on the weight of the beads, wherein the method comprises (a) providing an aqueous suspension of monomer droplets comprising an initiator, a monofunctional vinyl monomer, and a multifunctional vinyl monomer; (b) initiating polymerization of the monomer in the monomer droplets; (c) a monomer feed solution is added to the suspension while polymerization of the monomer in the monomer droplets occurs.)

1. A method of making a collection of polymeric beads, wherein the beads comprise

(i) 75 to 99 wt%, based on the weight of the beads, of polymerized units of a monofunctional vinyl monomer, and

(ii) from 1 to 25% by weight, based on the weight of the beads, of polymerized units of a polyfunctional vinyl monomer,

wherein the method comprises

(a) Providing an aqueous suspension of monomer droplets comprising an initiator, a monofunctional vinyl monomer, and a multifunctional vinyl monomer;

(b) initiating polymerization of the monomer in the monomer droplets;

(c) adding a monomer feed solution to the suspension while polymerization of the monomers in the monomer droplets occurs,

wherein the addition is started when the degree of polymerization of the monomer (EXTSTRATART) in the monomer droplets is from 0% to 50%, and

wherein the addition is ended when the degree of polymerization of the monomers in the monomer droplets (extsotop) is 5% to 100% after EXTSTART;

wherein the feed solution comprises monomers in an amount of 90 wt% to 100 wt%, based on the weight of the feed solution;

wherein the feed solution comprises a polyfunctional vinyl monomer in an amount of from 50 wt% to 100 wt% based on the weight of the feed solution.

2. The method of claim 1, wherein the amount EXTDIF-EXTSTART is 5% or higher.

3. The method of claim 1, wherein the monofunctional vinyl monomer comprises styrene.

4. The method of claim 1, wherein the multifunctional vinyl monomer comprises divinylbenzene.

5. A method of making a collection of polymeric beads, wherein the beads comprise

(i) 75 to 99 wt%, based on the weight of the beads, of polymerized units of a monofunctional vinyl monomer, and

(ii) from 1 to 25% by weight, based on the weight of the beads, of polymerized units of a polyfunctional vinyl monomer,

wherein the method comprises

(a) Providing an aqueous suspension of monomer droplets comprising an initiator, a monofunctional vinyl monomer, and a multifunctional vinyl monomer;

(b) initiating polymerization of the monomer in the monomer droplets;

(c) adding a monomer feed composition to the suspension while polymerization of the monomers in the monomer droplets occurs,

wherein the addition is started when the degree of polymerization of the monomer (EXTSTRATART) in the monomer droplets is from 0% to 50%, and

wherein the addition is ended when the degree of polymerization of the monomers in the monomer droplets (extsotop) is 5% to 100% after EXTSTART;

Wherein the feed composition comprises monomers dispersed in an aqueous medium;

wherein the feed composition comprises a multifunctional vinyl monomer in an amount of from 50 wt% to 100 wt%, based on the total weight of monomers in the feed composition.