Abstract: An interferometric displacement measurement apparatus (100) includes at least one measurement interferometer (103) for measuring a change in optical path difference between a measurement beam (150) and a reference beam. A light source module (118) is arranged to generate a modulated light beam, having a particular optical spectrum, from which the measurement beam and reference beam are derived. A data acquisition and analysis module (105) can determine a measure representative of the displacement using interference intensity data received from a photodetector (111) which detects the interference of the measurement beam with the reference beam.

Abstract: The present invention relates to a low-odor, polymerizable, cold-curing (meth)acrylate composition for floor coatings exhibiting low health hazards during application and consisting of (A) 50–100 wt % a (meth)acrylate; (B) 0–2 parts by weight per 1 part by weight of (A) of a pre-polymer that dissolves or swells in (A); (C) 2–5 parts by weight per 100 parts by weight of (A+B) of at least one paraffin and/or wax; (D) a redox system, containing an accelerator and a peroxide catalyst or initiator in an amount that is adequate for cold-curing of Component A; and (E) a conventional additive.

Abstract: The invention relates to polymer beads having a high content of diacyl peroxides. A prolongation of the pot life in reaction resins based on high-boiling methacrylate esters is achieved due to this high content of peroxides.

Abstract: The invention relates to polymer beads having a high content of diacyl peroxides. A prolongation of the pot life in reaction resins based on high-boiling methacrylate esters is achieved due to this high content of peroxides.

Abstract: The invention relates to polymer beads having a high content of diacyl peroxides. A prolongation of the pot life in reaction resins based on high-boiling methacrylate esters is achieved due to this high content of peroxides.

Abstract: A storage stable monomer/polymer composition comprises a component A and a component B. Component A comprises an emulsion polymer formed by the polymerization of 1-99% by weight of a C1-C10 alkyl acrylate, 99-1% by weight of C1-C10 alkyl methacrylate, and 0-0.5% by weight of a first graft component, which is then swollen by a mixture of at least one ethylenically unsaturated monomer and a polymerization initiator. Component B also comprises an emulsion polymer formed by the polymerization of 1-99% by weight of C1-C10 alkyl acrylate, 99-1% by weight of C1-C10 alkyl methacrylate, and 0-0.5% by weight of a second graft component, swollen with at least one ethylenically unsaturated monomer and a polymerization activator. Curing of the monomer/polymer composition begins only after the water has evaporated from the dispersion. The aqueous monomer/polymer compositions are used as binders for road marking paints, floor coating compositions, coating materials and sealing compositions.

Abstract: A storage stable monomer/polymer composition comprises a component A and a component B. Component A comprises an emulsion polymer formed by the polymerization of 1-99% by weight of a C1-C10 alkyl acrylate, 99-1% by weight of C1-C10 alkyl methacrylate, and 0-0.5% by weight of a first graft component, which is then swollen by a mixture of at least one ethylenically unsaturated monomer and a polymerization initiator. Component B also comprises an emulsion polymer formed by the polymerization of 1-99% by weight of C1-C10 alkyl acrylate, 99-1% by weight of C1-C10 alkyl methacrylate, and 0-0.5% by weight of a second graft component, swollen with at least one ethylenically unsaturated monomer and a polymerization activator. Curing of the monomer/polymer composition begins only after the water has evaporated from the dispersion. The aqueous monomer/polymer compositions are used as binders for road marking paints, floor coating compositions, coating materials and sealing compositions.

Abstract: The present invention relates to a low-odor, polymerizable, cold-curing (meth)acrylate composition for floor coatings exhibiting low health hazards during application and consisting of (A) 50-100 wt % a (meth)acrylate; (B) 0-2 parts by weight per 1 part by weight of (A) of a pre-polymer that dissolves or swells in (A); (C) 2-5 parts by weight per 100 parts by weight of (A+B) of at least one paraffin and/or wax; (D) a redox system, containing an accelerator and a peroxide catalyst or initiator in an amount that is adequate for cold-curing of Component A; and (E) a conventional additive.

Abstract: A method of producing low-viscosity water-based water-soluble polymer dispersions having a high concentration of the principal substance is achieved by polymerizing the following monomer components,(a1) 50-99.999 wt. % of at least one water-soluble monomer;(a2) 0.001-1 wt. % of at least one crosslinking monomer with at least two ethylenically unsaturated radically polymerizable groups;(a3) 0-30 wt. %, particularly 1-25 wt. %, of at least one hydrophobic monomer; and(a4) 0-25 wt. %, particularly 0.1-15 wt. %, of at least one amphiphilic monomer,in aqueous solution, in the presence of at least one polymer dispersant, to form a polymer (A), where the sum of the amounts of the components represented by the monomers (a1), (a2), (a3), and (a4) is 100 wt. % of the monomers, the weight average molecular weight of the resulting polymer (A) is at least 500,000 Dalton, and polymer (A) is incompatible with the dispersant.

Abstract: The invention relates to a process for the preparation of low viscous, water soluble polymer dispersions on an aqueous basis with a high concentration of the active substance, containing a polymerizate A) synthesized from the monomeric components, hydrophobic monomers and optionally amphiphilic monomers, which exhibit an average molecular weight M.sub.w of at least 5.times.10.sup.5 Dalton and contain at least one polymeric dispersing agent D), where in a first step an aqueous dispersion PD) is prepared from the polymerizate A) and at least one polymeric dispersing agent D); in a second step an aqueous, highly concentrated dispersion PD') is prepared from the aqueous dispersion PD) by extracting the water; and in a third step an aqueous dispersion PD") with a high content of the active substance is prepared through the addition of an aqueous dispersion of at least one polymeric dispersing agent D) to the concentrated dispersion PD'), and where the second and third process step can be repeated in succession.

Abstract: An aqueous, low-viscosity, water-soluble polymeric dispersion containing a polymer (A) is prepared by copolymerizing monomers:(a1) 99 to 70 weight % of at least one water-soluble monomer,(a2) 1 to 30 weight % of at least one hydrophobic monomer and,(a3) 0 to 20 weight % of at least one amphiphilic monomer, which monomers constitute 100 weight % of the polymers forming material which polymer (A) has an average molecular weight M.sub.W (mean weight) of at least 5.times.10.sup.5 Dalton, said process comprising:a first step i) of reacting said monomer ingredients in an aqueous dispersion in the presence of at least one polymeric dispersing agent (D) thereby preparing a dispersion of polymer (A); and a second step ii) of adding at least one polymeric dispersion agent (D), in an aqueous solution, to the dispersion.

Abstract: The invention relates to aqueous dispersions of water soluble polymers, formed by polymerization of a mixture A of various monomer components (a1, a2, and possibly a3) in the presence of a polymeric dispersant D; wherewith the mixture A is comprised of the following different monomera1 (in the amount of 99-70 wt. %), comprised of at least one water soluble monomer,a2 (in the amount of 1-30 wt. %), comprised of at least one hydrophobic monomer, and (possibly)a3 (in the amount of 0-20 wt. %), comprised of at least one amphipathic monomer, wherewith in each instance the sum of the amounts of a1, a2, and a3 is 100%;and wherewith the water soluble polymers have a mean molecular weight M.sub.w (gravimetric mean) of at least 10.sup.6 Dalton.

Abstract: Methods for making foundry sand containing a binder by combining a dried powdered carboxylated polymer, partially in its salt form, with dry or wet foundry sand free of binder.

Abstract: A method for wet metallizing articles made, or having a surface to be metallized, of an acrylic polymer containing at least 0.01 percent of acrylamide, methacrylamide, or of an acrylate ester or amide of an alkanol or alkyl amine have a terminal basic nitrogen group, e.g., an amino, substituted amino, or basic nitrogen heterocyclic group.

Abstract: An aqueous dispersion of a copolymer comprising:(A) from 20 to 90 percent by weight of an unsaturated carboxylic acid of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 are hydrogen, alkyl, or --(CH.sub.2).sub.n COOM and M is a proton or an alkali metal or alkaline earth metal or an ammonium cation, and(B) from 10 to 80 percent of at least one other comonomer different from and copolymerizable with A; methods of making a ready-to-use foundry molding sand by mixing such a dispersion with sand; and such ready-to-use foundry molding sands.

Abstract: A radiation sensitive polymeric material comprising a copolymer of methyl methacrylate and allyl methacrylate and at least one organosulfur compound having at least two --SH groups per molecule, said material being useful as a polymer resist sensitive to high energy radiation.

Abstract: What are disclosed are plastisols of copolymers of methyl methacrylate with from 0.1 to 10 weight percent of itaconic acid or of itaconic acid anhydride, which copolymers have a glass transition temperature above 50.degree. C., a degree of polymerization higher than 400 and an average particle size ranging from 0.1 to 500 microns and contain, per 100 parts by weight of the copolymer, from 100 to 1000 parts by weight of an organic plasticizer compatible with the copolymer, and optional fillers and further conventional additives.

Abstract: What is disclosed are a liquid coating and binding agent, hardenable under the influence of ultraviolet radiation, comprising an oligomer of the formula[(CH.sub.2 .dbd.CHCOO).sub.m ROOCC.sub.2 H.sub.4 ].sub.2 Sor[(CH.sub.2 .dbd.CHCOO).sub.m ROOCC.sub.2 H.sub.4 S].sub.p R',and a method for its preparation by the reaction of hydrogen sulfide or of a polymercaptan of the formulaR'(SH)pwith a polyacrylic acid ester of the formula(CH.sub.2 .dbd.CHCOO).sub.m+1 R.

Abstract: A storage-stable plastisol is disclosed comprising an organic plasticizer and particles of a methyl methacrylate copolymer, said particles comprising a core portion of a polymer compatible with said plasticizer and a surrounding shell portion of a polymer incompatible with the plasticizer.

Abstract: A method for polymerizing or copolymerizing water-soluble monomers, in a layer thickness between 2 and 100 mm, and at a temperature between 0.degree. C. and 100.degree. C., by irradiation with ultraviolet light in the presence of atmospheric oxygen, wherein the material to be polymerized contains at least 1 ppm of a water-soluble anthraquinone unsubstituted in the 1,4,5, and 8-positions and at least 10 ppm of dissolved chloride ions.