Acrylic rubber latex having bimodal particle distribution

Details Acrylic rubber latex having bimodal particle distribution Acrylic rubber latex having bimodal particle distribution

2005-03-08

2005-03-08

Mullis, Jeffrey (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C525S309000

Reexamination Certificate

active

06864303

ABSTRACT:
This invention provides a method for preparing an acrylic rubber latex having a bimodal particle size distribution, comprising the step of; a) preparing seed rubber latex containing i) alkyl acrylate, ii) saturated or unsaturated C1-C9organic acid, and iii) an acrylic multi-unsaturated monomer; b) preparing a bimodal rubber latex by adding i) alkyl acrylate and iii) an acrylic multi-unsaturated monomer to the seed rubber latex obtained in step a): and c) preparing rubber latex by grafting iv) alkyl methacrylate to the bimodal rubber latex obtained in step b). According to this invention, an acrylic rubber latex can be provided that satisfies the important factors for the improvement of impact resistance, i.e., the particle size of the impact modifier dispersed in a matrix and the distance between impact modifiers, thereby allowing the impact modifier to improve the impact resistance and weatherability of vinyl chloride resin.

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