摘要:
Aqueous copolymer dispersions suitable for use in the manufacture of adhesives or as binding agents or as coating substances are produced by the emulsion polymerization of from 1 to 50% by weight of ethylene and from 99 to 50% by weight of vinyl monomers. With the process of the invention, in which, as vinyl monomers, vinyl chloride and, if desired, other ethylenically-unsaturated monomers, for example esters, are used, a higher ethylene content in the copolymer can be obtained at a lower pressure than hitherto. For this purpose, the greater part of the vinyl monomers is metered in and, in addition, an inert organic substance is used.
摘要:
A process for the preparation of finely-divided aqueous copolymer dispersions with a solids content of 10 to 70% by weight, based on the dispersion, comprising emulsion polymerizing (a) 1 to 50% by weight of ethylene and (b) 99 to 50% by weight of at least two ethylenically unsaturated comonomers in the presence of a free-radial initiator and at least one member of the group consisting of emulsifier and a protective colloid and optionally present conventional adjuvants, the ethylenically unsaturataed comonomers being (b1) 79.5 to 99.5% by weight of vinyl chloride, (b2) 0 to 15% by weight of ethylenically unsaturated oil-soluble monomers, (b3) 0.5 to 10% by weight of ethylenically unsaturated, functional, water-soluble monomers and (b4) 0 to 5% by weight of oil-soluble monomers monoethylenically unsaturated and containing functional groups or polyethylenically unsaturated and mixtures thereof with the proviso that the monomers of (b2) and (b4) are copolymerizable with (a) and (b1), the comonomers being initially present in 1 to 40% by weight and the content of the water-soluble monomers being 1 to 35% by weight of the comonomers phase initially present and the rest of component (b) being added as an aqueous emulsion during polymerization and the polymerization is effected at 0.degree. to 120.degree. C. with an ethylene pressure of 10 to 150 bar which is built up at the latest by the point in time at which polymerization of the initial material is complete.
摘要:
Stabilized aqueous dispersions of vinyl chloride polymer having at least 25% by weight of vinyl chloride units in the polymer and having K values of between 20 and 80, having added as a stabilizing agent 0.3-6% by weight of substances selected from the group of compounds according to the general formula ##STR1## wherein n has the meaning of from 0 to 2 or water-soluble salts thereof. The invention also relates to a process of producing the stabilized products by adding the stabilizing agent after polymerization in aqueous dispersion, and to the use of the stabilized dispersions in binders, coating compositions, paints, adhesives, textile auxiliaries and paper-coating compositions.
摘要:
A plastisol based on PVC and/or copolymers of vinyl chloride and plasticizers as well as fillers and auxiliary materials, characterized by an additional content of a combination of A. AN IMIDAZOLE AND/OR BENZIMIDAZOLE OR THE SALTS THEREOF WITH WEAK ACIDS AS WELL AS B. BASIC METAL STABILIZER COMPOUNDS AND C. EPOXIDIZED PLASTICIZERS.
摘要:
A two-part adhesive composition exhibiting improved elasticity wherein its composition includes one or more acrylate or methacrylate ester monomers, a sulfur bearing compound, preferably a sulfonyl chloride, an amine promoter, preferably, an amine aldehyde reaction product, and a thermoplastic block copolymer component selected from the group consisting of a. a linear styrene-butadiene-styrene copolymer b. a radial styrene-butadiene-styrene block copolymer with a plasticizer, c. a linear or radial styrene-isoprene-styrene block copolymer, and d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer, and mixtures thereof.
摘要:
An adhesive composition comprising a polymer, a tackifier, and a plasticizing amount in the range of 5-40% by weight, 1,4-cyclohexane dimethanol dibenzoate.
摘要:
A novel process for the preparation of a readily dispersible, pourable dispersion powder comprising emulsion polymerizing in the presence of a free radial initiator a mixture of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of (a) 60 to 100% by weight of vinyl chloride, (b) 0 to 40% by weight of monoethylically unsaturated, oil-soluble monomers, (c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and (d) 0 to 5% by weight of oil-soluble monomers that are monoethylenically unsaturated and have functional groups or are multiple ethylenically unsaturated and optionally a protective colloid and/or emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethyelene copolymer, optionally adding to the aqueous dispersion (e) 0 to 40% by weight, based on the VCE-polymer, of at least one water-soluble substance having a T.sub.g .gtoreq.60.degree. C., (f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and (g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible, pourable powder of a vinyl chloride-ethylene copolymer and the powder produced by the said process and improved coatings, paints, glues and adhesives containing the said redispersible powder.
摘要:
This invention presents to the art novel heat curable adhesive systems and laminates bonded by the adhesive system. The heat curable adhesive system comprises a heat curable adhesive composition which is a dispersion of a specific polyester, a polyvinylchloride which is or includes a carboxylated polyvinyl chloride and a polyepoxide and a curing agent for the adhesive composition. Curing of the adhesive composition can be effected at relatively low activation temperatures which provides distinct advantages in preparing laminates particularly those involving thin sheets of polymeric material bonded to metal sheet materials.
摘要:
Cross-linkable vinyl ester and/or vinyl halide copolymers containing hydroxyl groups consisting essentially of:(a) from 50% to 99% by weight of monomer units selected from the group consisting of vinyl esters of alkanoic acids having from 1 to 18 carbon atoms, vinyl halides, and mixtures of said vinyl esters and vinyl halides,(b) from 0 to 40% by weight of mono-olefinically-unsaturated monomer units copolymerizable with vinyl esters and vinyl halide,(c) from 1% to 50% by weight of allyl ester monomer units of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen and alkyl having from 1 to 16 carbon atoms, and R.sub.3 is alkylene having from 1 to 16 carbon atoms, with the proviso that the total number of carbon atoms in R.sub.1, R.sub.2 and R.sub.3 is at least 2,where said copolymer has a K-value of between 10 and 100.
摘要翻译:含有羟基的可交联的乙烯基酯和/或乙烯基卤化物共聚物基本上由以下组成:(a)50-99%(重量)单体单元,其选自具有1至18个碳原子的链烷酸的乙烯基酯 ,乙烯基卤化物和所述乙烯基酯和乙烯基卤化物的混合物,(b)0至40重量%的可与乙烯基酯和乙烯基卤化物共聚的单烯属不饱和单体单元,(c)1至50% 其中R 1和R 2选自氢和具有1至16个碳原子的烷基,R 3是具有1至16个碳原子的亚烷基,条件是下式的烯丙基酯单体单元的重量: R 1,R 2和R 3中的碳原子总数至少为2,其中所述共聚物的K值为10-100。
摘要:
There is provided a curable anaerobic pressure sensitive adhesive composition, a mixture of a curable anaerobic system and a high molecular weight polymer system. The mixture which may include a tackifier and other functional additives constitutes a pressure sensitive adhesive and exhibits elastomeric properties. There is also provided in the composition an initiator systemnecessary to permit curing of the anaerobic pressure sensitive composition upon activation by the exclusion of oxygen. One or more accelerators for cure may also be provided.In one embodiment a component of the catalyst system may be either absent and provided later or latently present in microspheres which upon rupture will enhance the curing operation.