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公开(公告)号：DE2602688A1
公开(公告)日：1977-07-28
申请号：DE2602688
申请日：1976-01-24
Applicant: BASF AG
IPC: C08F220/12 , D21H17/35 , D21H17/37 , D21H17/43 , D21H17/45 , D21H3/44 , D21H3/46 , C08F220/34
Abstract: Prepn. of shear-stable aq. copolymer dispersions for use as paper sizes, by copolymerisation of (A) 0.5-15 wt. % monomer contg. a COOH and/or SO3H, phosphate or phosphite gp., with (B) 5-30% monomer contg. a tert. or quaternary amino gp. or N-contg. heterocyclic gp., in aq. phase, followed by further polymerisation with (C) 0-94.5% styrene and/or acrylonitrile, (D) 0-94.5% (meth)acrylate ester of a 1-8C alkanol and (E) 0-30% further olefinic-unsatd. monomers. During polymerisation, the pH is 7, and amt. of (C) plus (D) is >=25%. Use of dispersions as above, from 25-80% (C), and 25-64.5% (D), with the pH adjusted to over 7 after polymerisation, in combination with optical brighteners and/or starches and/or an anionic polymer soln. or dispersion, for pulp or surface sizing of paper. Alkaline sizes do not adversely affect the action of optical brighteners, are compatible with all types of starch and can be mixed in any ratio with anionic solns. or dispersions, e.g. those based on styrene and maleic anhydride and/or (meth)acrylic acid.
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Patent Agency Ranking
公开(公告)号：DE2831845A1
公开(公告)日：1980-02-07
申请号：DE2831845
申请日：1978-07-20
Applicant: BASF AG
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公开(公告)号：DE2452585A1
公开(公告)日：1976-05-13
申请号：DE2452585
申请日：1974-11-06
Applicant: BASF AG
IPC: C08F212/08 , C08F220/12 , C08F220/44 , D21H17/42 , D21H17/43 , D21H17/45 , C08F220/34
Abstract: Shear-resistant aqueous copolymer emulsions which can be used for sizing paper are manufactured by first copolymerizing, in the aqueous phase of an aqueous emulsion, using conventional polymerization initiators which form free radicals, (A) from 0.5 to 15 per cent by weight of monomers containing a polymerizable C=C bond and at least one carboxyl and/or sulfonic acid or phosphate or phosphite group with (B) from 5 to 30 per cent by weight of monomers containing a C=C bond and a tertiary or quaternary amino group, or a nitrogen-containing heterocyclic group, and then adding, while continuing the copolymerization, (C) from 0 to 94.5 per cent by weight of styrene and/or acrylonitrile and (D) from 0 to 94.5 per cent by weight of acrylic or methacrylic acid esters of alkanols of 1 to 8 carbon atoms as well as (E) from 0 to 30 per cent by weight of further olefinically unsaturated monomers, and completing the polymerization, the pH during the polymerization being less than 7 and the amount of monomers (C) and (D) together being at least 25 per cent by weight.
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公开(公告)号：DE2548393A1
公开(公告)日：1977-05-12
申请号：DE2548393
申请日：1975-10-29
Applicant: BASF AG
Abstract: The sizing material is based on anionic polymer consisting of (A) 10-60 wt. % of a soln. copolymer of 30-90 wt. % copolymerisable ethylenic unsatd. hydrocarbon cpd., vinyl ether, acrylic acid- or methacrylic acid ester and 70-10 wt. % maleic acid anhydride and or ethylenic unsatd. 3-5C carboxylic acid. To this in aq. alkaline soln., which contains =60 wt. % dispersed copolymer constituents and =50 wt. % of an H2O miscible organic solvent, are grafted (B) 90-40 wt. % (w.r.t. the mixt. of A and B) of a mixt. of ethylenic unsatd. copolymerisable (with each other) monomers. (B) components, polymerised alone form hydrophobic copolymers with a Glass temp. between +60 degrees and -40 degrees C. Dispersion with very high solids content and relatively low viscosity, a very high size gloss stability and alkali stability are obtd. They are used primarily in paper production.
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公开(公告)号：DE2823300A1
公开(公告)日：1979-12-13
申请号：DE2823300
申请日：1978-05-29
Applicant: BASF AG
Abstract: Prodn. of tack-free surfaces on flexographic relief printing plates is effected by treating the tacky surface with Br2, which can be in the form of an (aq.) soln. or a Br-releasing complex cpd. The reliefs are made by selective exposure with actinic light of a polymer monomer mixt. contg. a styrene-isoprene block copolymer with >=2 blocks of 30-95 wt.% isoprene with a mol.wt. of 2000-100,000 and of 5-70 wt.% styrene with a mol. wt. of 20,000-1,200,000, followed by removal of the unexposed areas. The plates are uniformly tack-free and do not become tacky again, even after use for large editions (e.g. over 1,000,000). The characteristic yellow colour of the Br2 solns. allows their concn. and hence effectiveness to be assessed, even in yellow safety light, and the spent solns. can easily be rendered harmless by treatment with Na2S2O3.
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公开(公告)号：DE2454397A1
公开(公告)日：1976-05-26
申请号：DE2454397
申请日：1974-11-16
Applicant: BASF AG
IPC: C08F2/28 , C08F212/08 , D06M15/233 , D06M15/267 , D21H17/45
Abstract: Cationic aq. copolymer dispersions useful in coatings for paper, leather and textiles are prepd. by emulsion co-polymerising a mixt. of olefinically unsatd. monomers in the presence of a 5-30 wt% aq. soln. or dispersion of a co-polymer of (a) 70-90 wt% styrene and/or a (meth)acrylic ester of a 1-8C alkanol, opt. together with acrylonitrile, and (b) 10-30 wt% monoolefinically unsatd. monomers having tertiary, protonated tertiary or quaternary N atoms, this copolymer having a IT value of 20-60, and the soln./dispersion opt. contg. up to 20 wt% water soluble org. solvent. The monomer mixt. consists of (c) an acrylic ester of a 1-8C alkanol and/or butadiene, (d) styrene, acrylonitrile and/or methyl methacrylate, and (e) 0-10 wt%, based on total monomers, of an alpha, beta-monoolefinically unsatd. 3-5C mono- or dicarboxylic acid, a water soluble salt of these acids, and/or an amide of these acids, this amide being opt. substd. by N-methylol or N-alkoxymethyl gps. on its N atom. The total amt. of monomers (c), (d) and (e) is 1-10 pts. wt. per 1 pt. wt. of the copolymer derived from (ae and (b), and the amts. of (c), (d) and (e) are selected to give a copolymer having a glass transition temp. of -15 to +60 degrees C.
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