Title:
水性ポリマー分散物
Document Type and Number:
Japanese Patent JP2012515812
Kind Code:
A
Abstract:
Aqueous polymer dispersion comprises at least one core copolymer (A) and at least one shell copolymer (B), where the glass transition temperature (T g) of the core is 70-100[deg] C, the T gof the shell is 20-55[deg] C, the total T gof the core-shell copolymer is 30-80[deg] C and the dispersion contains an emulsifier content of = 1.5 wt.%, relative to the solid substance. An independent claim is included for preparing the above polymer dispersion, comprising (a1) providing water, emulsifier and optionally a small quantity of initiator, (a2) subsequently adding a content of the monomers ((i) 1-20C alkyl(meth)acrylate, (ii) vinyl aromatic compounds having up to 20C and (iii) acid functional monomer) of 1-10 wt.% optionally simultaneously during the addition of the initiator for forming an internal seed, (a3) adding the monomers ((i)-(iii) and (iv) optional hydroxy functional monomer), for the copolymer (A) (core) in step-wise manner, (a4) polymerizing up to a quantity of at least 5 wt.%, relative to its total weight, (a5) adding the monomers (i)-(iv) for the copolymer (B), and (a6) polymerizing up to a quantity of at least 5 wt.%, relative to its total weight.
Inventors:
Grabrobits, Hans Georg
Goerzmann, Rolf
Aften, Deruk
Almaty Gitelas, Maria
Garcia Martinez, Juan Miquel
Goerzmann, Rolf
Aften, Deruk
Almaty Gitelas, Maria
Garcia Martinez, Juan Miquel
Application Number:
JP2011546661A
Publication Date:
July 12, 2012
Filing Date:
January 13, 2010
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C08F220/18; C08F212/02; C08F220/04; C09D5/02; C09D125/14; C09D133/04; C09D151/00
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Kenichi Morizumi
Kajita Marina
Takuji Yamada
Kenichi Morizumi
Kajita Marina