Stable aqueous film-forming dispersions

Details Stable aqueous film-forming dispersions Stable aqueous film-forming dispersions

C - Chemistry, Metallurgy

08

L

400/5017

C08L 101/00 (2006.01) C08F 2/24 (2006.01) C08F 2/44 (2006.01) C08F 283/00 (2006.01) C09D 167/00 (2006.01)

Patent

CA 1183979

ABSTRACT OF THE INVENTION This invention relates to the preparation of stable aqueous dispersions of particles of film-forming polymer, the particles comprising at least one pre-formed polymer and at least one polymer formed in situ ("multi- polymer particles"). The inadequate stability exhibited by many previously known film-forming systems based on multi- polymer particles especially in the presence of co-solvents, may be overcome by preparing the particles in the presence of a stabilising compound which is an amphipathic compound with a hydrophilic- lipophilic balance (HLB) value of at least 8 and whose lipophilic portion comprises at least one ethylenic double bond. The dispersions of this invention are useful as the film-forming components of coating compositions.

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