公开(公告)号：AT66263T

公开(公告)日：1991-08-15

申请号：AT88100893

申请日：1988-01-22

Applicant: BASF AG

Inventor： DEGEN HANS-JUERGEN DR ,  REICHEL FRITZ DR ,  RIEBELING ULRICH DR ,  HOEHR LOTHAR DR

IPC: C08F2/22 ,  C08F2/44 ,  C08F4/28 ,  C08F20/52 ,  C08F220/10 ,  C08F220/12 ,  C08F220/18 ,  C08F220/42 ,  C08F220/56 ,  C08F251/00 ,  D21H17/28 ,  D21H17/37 ,  D21H19/20 ,  D21H19/24 ,  D21H21/16

公开(公告)号：ES2023442T5

公开(公告)日：1995-08-16

申请号：ES88100893

申请日：1988-01-22

Applicant: BASF AG

Inventor： DEGEN HANS-JUERGEN DR ,  REICHEL FRITZ DR ,  RIEBELING ULRICH DR ,  HOEHR LOTHAR DR

IPC: C08F2/22 ,  C08F2/44 ,  C08F4/28 ,  C08F20/52 ,  C08F220/10 ,  C08F220/12 ,  C08F220/18 ,  C08F220/42 ,  C08F220/56 ,  C08F251/00 ,  D21H17/28 ,  D21H17/37 ,  D21H19/20 ,  D21H19/24 ,  D21H21/16

Abstract: Sizing agents for paper are based on finely divided aqueous dispersions of copolymers obtainable by copolymerizing from 40 to 140 parts by weight of a monomer mixture of (a) from 20 to 65% by weight of (meth)acrylonitrile, (b) from 35 to 80% by weight of one or more acrylates of monohydric saturated C3-C8-alcohols and (c) from 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers, the weight percentages (a), (b) and (c) always adding up to 100, in the manner of an emulsion polymerization in 100 parts by weight of an aqueous solution containing in solution from 2.7 to 15% by weight of a degraded starch having a viscosity ni from 0.04 to less than 0.12 dl/g at from 40 DEG to 100 DEG C. in the presence of a peroxide initiator.

公开(公告)号：DE3864152D1

公开(公告)日：1991-09-19

申请号：DE3864152

申请日：1988-01-22

Applicant: BASF AG

Inventor： DEGEN HANS-JUERGEN DR ,  REICHEL FRITZ DR ,  RIEBELING ULRICH DR ,  HOEHR LOTHAR DR

IPC: C08F2/22 ,  C08F2/44 ,  C08F4/28 ,  C08F20/52 ,  C08F220/10 ,  C08F220/12 ,  C08F220/18 ,  C08F220/42 ,  C08F220/56 ,  C08F251/00 ,  D21H17/28 ,  D21H17/37 ,  D21H19/20 ,  D21H19/24 ,  D21H21/16

Abstract: Paper size is based on finely-divided aq. dispersions of copolymers (I) obtd. by emulsion copolymerisation of ethylenically unsatd. monomers in the presence of starch. 40-140 (wt.) pts. monomer mixt. of 20-65% (a) (meth)acrylonitrile, (b) 80-35% 3-8C alkyl acrylate and (c) 0-10% other ethylenically unsatd. comonomers are copolymerised in 100 pts. aq. soln. of 2.7-15% degraded starch, with an intrinsic viscosity of 0.04 to under 0.12 dl/g. at 40-100 deg.C in the presence of a peroxide initiator. The monomer mixt. pref. contains (a) acrylonitrile, (b) butyl acrylate(s) and opt. (c) di-1-3C-alkylamino-2-6C-alkyl (meth)acrylate, N-vinylimidazoline and/or N-vinyl-2 methylimidazoline or their quaternisation prods., or styrene, (meth)acrylamide, methacrylate esters and acrylate esters other than those used as (b). The starch is modified by enzymatic and then oxidative degradation to a viscosity of 0.045-0.11 dl/g.