Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
  • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
  • C08F20/10—Esters
  • C08F20/26—Esters containing oxygen in addition to the carboxy oxygen
  • C08F20/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
  • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
  • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
  • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
  • H01B3/447—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from acrylic compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
  • C08F222/10—Esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • C08L33/04—Homopolymers or copolymers of esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
  • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
  • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
  • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
  • C08F222/10—Esters
  • C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
  • C08F222/106—Esters of polycondensation macromers
  • C08F222/1063—Esters of polycondensation macromers of alcohol terminated polyethers

Definitions

• compositions in particular as a 2-component system, with (meth) acrylated polyether polyols and / or polyester polyols and / or (meth) acrylated hydroxy-functionalized triglycerides having an adjustable pot life, in particular for
• Isocyanates as hardener component. Isocyanate, especially MDI
• EP1070730 describes methacrylate-based cable encapsulants in which crosslinking takes place via polyethylene glycol dimethacrylate.
• WO 2011/012918 cable casting compounds with urethane acrylate oligomers and epoxy acrylate oligomers as
• the object of the invention was to provide curing systems at room temperature whose curing properties can be influenced in a simple manner.
• the pot life should be adjustable within wide limits and still the composition quickly at a defined time without energy supply, e.g. fully cure within 100 minutes, preferably within less than 50 minutes.
• the mechanical properties of the cured resin can be adapted and varied in a simple manner, for example by varying the resin components to the required conditions of use.
• Another object to be solved according to the invention is to minimize the shrinkage during curing and also the odor nuisance caused by the ingredients used.
• the disadvantage of the known from the prior art polyurethane systems should be avoided that when used as a potting compound, the adhesion between the shell mold and the potting compound high, so that the mold shells so far remain as a trim component around the potting compound around, ie not be removed can. It should be made available compositions that form little or no adhesive bond with the shell, harden quickly and without excessive heat, so that the shell can be used again as a tool.
• compositions according to the invention for example the design of the compositions as a 2-component system or the use of the compositions are protected in the subclaims dependent on claim 1.
• Composition such as the pot life, to deteriorate.
• compositions especially when used as Jardinvergussmassen distinguished by a particularly low water absorption. It has also been found that the high molecular weight of the components used results in the composition having a low vapor pressure.
• the 2-component systems with methacrylates known in the art are classified as irritating since exposure is increased by the higher vapor pressure of the monomers.
• Polymerization have a lower shrinkage, than the methacrylate systems on the market.
• the pot life can be varied within a wide range. Depending on the ambient temperature and the
• the pot life can be optimized by initiator and / or amount of activator.
• the polymerization time measurement (PZ measurement) described in the appendix provides the user with a simple screening method by means of which the optimum processing time of the mixed components (pot life) and curing rate can be found by means of a few series experiments.
• the optimum processing time of the mixed components (pot life) and curing rate can be found by means of a few series experiments.
• Temperature development and maximum temperature in the polymerization of the mass are estimated and adjusted in a targeted manner.
• the values determined in the PZ measurement in the preliminary test correlate very well with the curing parameters of a correspondingly composed mixture under conditions of use.
• the (meth) acrylated polyether polyols used in the present invention (meth) acrylated polyester polyols or (meth) acrylated hydroxy-functionalized
• Triglycerides are by reaction of suitable (meth) acrylic acid compounds with
• Polyether polyols Polyether polyols, polyester polyols or hydroxy-functionalized triglycerides.
• the notation (meth) acrylate here means both methacrylate, such as
• Polyether polyols are usually the product of the polymerization of epoxides, such as ethylene oxide (EO), propylene oxide (PO), butylene oxide, styrene oxide or epichlorohydrin with itself or by addition of these epoxides, optionally in a mixture or
• epoxides such as ethylene oxide (EO), propylene oxide (PO), butylene oxide, styrene oxide or epichlorohydrin with itself or by addition of these epoxides, optionally in a mixture or
• starter components with reactive hydrogen atoms such as water, alcohols, ammonia or amines.
• Such starter molecules generally have a functionality of 1 to 8.
• Examples of such starting compounds are di- to octafunctional hydroxy compounds such as polyhydric alcohols, in particular diols such as ethylene glycol, 1, 2-propylene glycol, 1, 3-propylene glycol, diethylene glycol, dipropylene glycol, 1, 4-butylene glycol and 1, 6-hexamethylene glycol, triols such as glycerol and trimethylolpropane, tetraols such as pentaerythritol, hexaols such as sorbitol, and octaols such as sucrose.
• these polyether polyols may be homopolymers, block copolymers or randomly distributed copolymers.
• polyester polyols in this context are those which are composed wholly or predominantly of polycarboxylic acids or derivatives thereof having at least 2 and at most 6, preferably 4 carboxyl groups and a total of 4 to 12 carbon atoms, that is, e.g. Adipic, glutaric, succinic, phthalic, etc. and which are prepared at temperatures of> 180 ° C with elimination of water or a low molecular weight, usually monofunctional alcohol.
• Usual catalysts here are e.g. Tin or titanium compounds.
• hydroxy-functionalized triglycerides as well as semi-synthetic hydroxy-functionalized triglycerides are used.
• Examples of naturally occurring raw materials are castor oil, lesquerella oil, polyhydroxy fatty acid, riciniolic acid, hydroxyl-modified oils such as Grape seed oil, black seed oil, pumpkin seed oil, borage seed oil, soybean oil, wheat germ oil, rapeseed oil, sunflower oil, peanut oil, apricot kernel oil, pistachio nut oil, almond oil, olive oil, macadamia nut oil, avocado oil, sea buckthorn oil, sesame oil, hemp oil, hazelnut oil, evening primrose oil, rosehip oil, safflower oil, walnut oil, hydroxyl-modified fatty acids and
• castor oil which occurs in the seeds of the castor tree, which in large quantities in many parts of the world such. B. in India, Brazil and China is bred.
• Castor oil is unique among seed oils as it contains mainly from a hydroxyl group, unsaturated Ci is 8 fatty acid, called ricinoleic acid.
• Natural castor oil has a functionality of about 2.7 OH groups / mol and an OH number of at least 160mg KOH / g. The acid content of natural castor oil is max. 2 mg KOH / g.
• the average molar mass of castor oil is in the range from greater than 800 g / mol, in particular in the range from 800 to 2000 g / mol, preferably in the range from 820 to 1500 g / mol and particularly preferably in the range from 850 to 1200 g / mol.
• Castor oil may consist of a mixture of glycerides of fatty acids such as ricinoleic acid, oleic acid, linoleic acid, stearic acid or dihydroxystearic acid.
• Particularly preferred is the use of a castor oil containing at least 85 wt .-%, preferably at least 90 wt .-% Ricinolklareglycerid.
• hydroxy-functionalized triglycerides can also be obtained by epoxidation of unsaturated triglycerides and subsequent hydrolysis
• the mechanical properties of the potting compounds can be achieved by using individual compounds of the (meth) acrylated polyols or by the use of suitable
• Potting compound hardness, desired curing rate
• the potting compound optionally incorporating the polymerization time measurement, be adjusted accordingly with respect to the proportions of the polyol components and mixing ratios.
• (meth) acrylated polyols preferably formed from a mixture of at least two different (meth) acrylated compounds of component a).
• Mixture may for example consist of two different representatives of the different classes of compounds, for example mixtures of each (meth) acrylated polyether / polyester, polyether / hydroxy-functionalized triglyceride or
• Polyester / hydroxyfunctional triglyceride In the same way, however, it is also possible to use two or more structurally different representatives of a single class of compounds in a mixture, for example two or more polyethers each having a different molecular weight and / or hydroxyl number, two or more polyesters each having a different molecular weight and / or Hydroxyl number or two or more hydroxy-functionalized triglycerides each having different molecular weight and / or hydroxyl number.
• two or more different members of different classes of compounds and two or more different structurally different members of a single class of compounds may also be used in a mixture.
• Advantageous mixtures include, for example, a polyether polyol, which before the
• (Meth) acrylation generally has an average molecular weight of 230-650 g / mol and an average hydroxyl value of 220-500 mg KOH / g, preferably an average molecular weight of 300-500 g / mol and an average hydroxyl value of 300-450 mg KOH / g and in particular has an average molecular weight of 400-500 g / mol and an average hydroxyl value of 340-420 mg KOH / g.
• a second polyether polyol prior to (meth) acrylation is generally an average molecular weight of 1000-8000 g / mol and an average hydroxyl number of 10-180 mg KOH / g, preferably a mean molecular weight of 2000-6000 g / mol and a mean
• (meth) acrylated polyester polyols are used in the mixture, they generally have an average molecular weight of 500-2000 g / mol before (meth) acrylation and a average hydroxyl value of 40-250 mg KOH / g, preferably an average molecular weight of 600-1500 g / mol and an average hydroxyl value of 100-220 mg KOH / g and in particular an average molecular weight of 800-1 100 g / mol and an average hydroxyl value of 1 10-140mg KOH / g.
• Triglycerides these have (before) (meth) acrylation preferably an average molecular weight> 800 g / mol, in particular from 800 to 2000 g / mol, preferably in the range of 820 to 1500 g / mol and particularly preferably in the range of 850 to 1200 g / mol and an average hydroxyl value of 120-250 mg KOH / g, preferably of 150-170 mg KOH / g, and in particular about 160mg KOH / g.
• hydroxy-functional triglyceride is (meth) acrylated castor oil.
• compositions may also optionally further mono- or
• All vinylically unsaturated compounds which can copolymerize with the monomers a) according to the invention can be used for this purpose. Examples include, but are not limited to, methyl (meth) acrylate,
• Glycol dimethacrylates such as 1,4-butanediol methacrylate, 2-butoxyethyl methacrylate, 2-ethoxyethoxymethyl methacrylate, 2-ethoxyethyl methacrylate;
• Methacrylates of ether alcohols such as tetrahydrofurfuryl methacrylate,
• Methoxymethoxyethyl methacrylate benzyloxymethyl methacrylate, furfuryl methacrylate, 2-butoxyethyl methacrylate, 2-ethoxyethoxymethyl methacrylate, 2-ethoxyethyl methacrylate, allyloxymethyl methacrylate, 1-ethoxybutyl methacrylate, methoxymethyl methacrylate, 1-ethoxyethyl methacrylate, ethoxymethyl methacrylate and ethoxylated (meth) acrylates which preferably have 1 to 20, in particular 2 to 8, ethoxy groups ; Styrene, substituted styrenes having an alkyl substituent in the side chain, such as. B.
• alpha-methylstyrene and alpha-ethylstyrene substituted styrenes having an alkyl substituent on the ring, such as vinyltoluene and p-methylstyrene, halogenated styrenes, such as
• (meth) acrylated compounds a) higher vapor pressure only in small amounts. These compounds may be present in the compositions in a total amount of 0-25% by weight, preferably 0-20% by weight and most preferably 0-10% by weight, these percentages being by weight overall
• the curing is considered in the art then as sufficient, if one
• Form stability of Shore D is reached greater than 10, preferably a Shore hardness D is greater than 20 after complete curing. This is achieved with polyurethane systems according to the prior art only after about 30 minutes, and also the adhesion between the shell mold and the potting compound is high, so that the mold shells so far remains as a trim component around the potting compound, i. they are not removed anymore.
• compositions according to the invention have the advantage that, when used as potting compounds, they do not form any adhesive bond with the shell, harden quickly and without excessive heat development, so that they can be reused as a tool.
• compositions based on the (meth) acrylated polyols according to the invention allow curing times of 20-30 minutes with at the same time moderate
• the curing temperature of the composition should not exceed 95.degree. C., preferably 85.degree. C. and particularly preferably 75.degree.
• stabilizers or inhibitors known from the prior art phenolic or amine-containing inhibitors preferably HQME, Tempol or phenothiazine can be used.
• the stabilizers are added to the (meth) acrylated compounds a) usually in amounts of 1-1000 ppm, if they are to be stabilized.
• the stabilizer content may be between 1 and 1000 ppm, this information being based on the total amount of the compounds a) contained in the Mixture refers.
• the initiators are used in conventional amounts, for example in amounts of 0.01 to 10 wt .-%, preferably 0.05 to 5 wt .-%, in particular 0.1 to 1, 0 wt .-% based on the weight of entire composition. If initiators are used in dilute, so-called phlegmatized form, their individual initiator percentage must be taken into account in the initial weighing so that the above-mentioned amount of effective initiator is actually used. As initiators, it is possible to use all compounds which decompose into free radicals under the polymerization conditions, for example peroxides, hydroperoxides, hydrogen peroxide, persulfates,
• Azo compounds and the so-called redox initiators are advantageous to use mixtures of different initiators, for example mixtures of hydrogen peroxide and sodium or potassium peroxodisulfate. Mixtures from
• Hydrogen peroxide and sodium peroxodisulfate can be used in any proportion.
• Suitable organic peroxides are, for example, acetylacetone peroxide, methyl ethyl ketone peroxide, tert-butyl hydroperoxide, cumene hydroperoxide, tert-amyl perpivalate, tert-butyl perpivalate, tert-butyl perohexanoate, tert-butyl perisobutyrate, tert-butyl per-2-ethylhexanoate, tert.
• Further initiators are azo compounds, for example 2,2'-
• Preferred initiators are redox initiator systems. These contain as oxidizing component at least one of the abovementioned peroxo compounds and as reducing component, for example, ascorbic acid, glucose, sorbose, ammonium or alkali metal hydrosulfite, sulfite, thiosulfate, hyposulfite, pyrosulfite, sulfide or sodium hydroxymethylsulfoxylate.
• redox initiator systems may also employ amines as accelerators (activators), e.g. Dimethyl- or diethylanilines, para-toluidine or its adducts with ethylene oxide (BISOMER PTE, International Specialty Chemicals).
• activators e.g. Dimethyl- or diethylanilines, para-toluidine or its adducts with ethylene oxide (BISOMER PTE, International Specialty Chemicals).
• BISOMER PTE International Specialty Chemicals
• Casting compound component added, which does not contain the initiator, or directly before use in solid, liquid or dissolved form to the initiator-containing
• Vergussmassenkomponente added.
• peroxide / amine redox system peroxide / cobalt accelerator combinations can also be used.
• component A may comprise either only initiator or initiator and fillers.
• Component A comprises in this case 0.01-10% by weight of initiator and 0-90% by weight of fillers, these percentages being based on the weight of the total composition consisting of the two components A and B, d. H. the compounds a) to d) and optionally present further
• Components relate.
• the component A consists only of initiator, although it accounts for 100 wt .-% of the component A, on the weight of the total
• composition however, as described above, 0.01 to 10 wt .-%.
• Component B in this embodiment comprises 9.98-99.98 weight percent of one or more compounds selected from (meth) acrylated polyether polyols, (meth) acrylated polyester polyols, or (meth) acrylated hydroxy-functional triglycerides, and 0.01-10 weight percent. % Activator, whereby these percentages are based on the weight of the total
• component A may comprise 9.98-99.98% by weight of one or more compounds selected from (meth) acrylated polyether polyols,
• (meth) acrylated hydroxy-functionalized triglycerides and 0.01 to 10 wt .-% activator include.
• the mixture of the (meth) acrylated polyols is contained both in the component A and in the component B.
• the above percentages are based on the weight of the total composition, ie the sum of all constituents of components A and B, d. H. the compounds a) to d) and any other constituents present and the sum of all individual values must always be 100% by weight.
• the 2-component system with controllable pot life as component A) contains 89.90-99.99% by weight of (meth) acrylated polyetherpolyols or (meth) acrylated polyesterpolyols or mixtures of both, 0.01-10 Wt .-% initiator and 1 - 1000 ppm stabilizer, the sum of the
• Component A must always give 100 wt .-%, and as component B) 89.90-99.99 wt .-% (meth) acrylated polyether or (meth) acrylated polyester or mixtures of both, 0.01 -10 wt. % Activator and 1-1000 ppm of stabilizer, the sum of component B always having to be 100% by weight, and 0-90% by weight of fillers.
• the initiator is dissolved in component A, which contains a mixture of (meth) acrylated polyols.
• Component B then consists exclusively of activator.
• component A may comprise 9.98-99.98% by weight of one or more compounds selected from (meth) acrylated polyether polyols,
• Triglycerides 0.01 to 10% by weight of initiator and optionally 0 to 90% by weight of fillers and component B comprising 0.01 to 10% by weight of activator.
• Percentages refer to the weight of the total composition, ie the sum of all constituents of components A and B, ie the compounds a) to d) and any further constituents present and the sum of all individual values must always be 100 wt .-%.
• a two-component system is used which comprises 50-85% of component A and 15-50% of component B, preferably 55-75% of component A and 25-45% of component B and more preferably 60-70% of component A and 30. Contains 40% of component B, and the components A and B may consist of the compositions described above.
• Fillers which can be used are all mineral fillers known from the prior art; quartz flours, dolomite, sand, chalk, oxides, hydroxides, basic carbonates and carbonates of the alkaline earth metals can preferably be used.
• the one-component or two-component system according to the invention can be used both without fillers and also highly filled up to 90% by weight, preferably the fillers in the range of 10-90% by weight, preferably of 30-80% by weight. and more preferably from 60 to 70% by weight. These abovementioned percentages are based on the total weight of the ready-mixed composition.
• compositions of the invention are preferably used for the production of waterproof and electrically impact-resistant masses in cavities, in particular potting compound for the sealing of electrical cables in cable connection sleeves or as potting compounds for electronic assemblies.
• a method for providing a potting compound preferably comprises the following steps: a) providing the component A in a suitable container (can, bag, kettle, etc.) b) providing the component B in a suitable container (can, bag, kettle, etc. c) Mixing of both components before use and backfilling of the cavity to be filled with this mixture followed by curing d) If necessary, removing the cavity lining forming the cavity
• a) providing the component A in a suitable container (can, bag, kettle, etc.) b) providing the component B in a suitable container (can, bag, kettle, etc. c) Mixing of both components before use and backfilling of the cavity to be filled with this mixture followed by curing d) If necessary, removing the cavity lining forming the cavity
• the usable containers for components A and B are well known to those skilled in the art.
• bags and cauldrons of any material in particular bags of polymeric material can be used. These are also sometimes referred to as tubular bag or sachet.
• the container for the components A and B consists of a single bag of polymeric material containing the two components in separate chambers. This can either be done by a suitable
• Minischelle or Trennklemmung, etc is a mixing of the two components in the bag, for example by intensive kneading possible and the cavity to be filled can be poured with this mixture.
• the shell molds to be used are known to those skilled in the art and it can be used in the context of the invention, all known from the prior art types of shell molds.
• Polyesterpolyol P-1010 (Kuraray)
• Methylmethacrylate / MeOH azeotrope at a reflux ratio of 50: 1 separated.
• Methacrylated polyether polyols ISO-Pol T35 and ISO-Pol T400, Fa. Isoelektra
• Initiator 1 - 3 wt .-% 50% benzoyl peroxide (BP-50FT, Fa. Fluka)
• Activator 0.4-1% by weight of N-ethoxylated p-toluidine (PT25E / 2, Saltigo)
• composition see Table 1
• Initiator BP-50-FT, amounts are based on the 50% supplied quantity
• activator PT25E / 2
• This temperature probe is located in a second, smaller tube filled with diethylene glycol as the carrier liquid, which is fixed in the center of the test tube so that it dips deep enough in the sample liquid to allow an accurate measurement of the sample temperature.
• the start of the measurement is the time of combining the redox components.
• the position of the maximum reaction temperature T max corresponds to the polymerization time.
• the samples were re-dried overnight (about 14 h) at 80 ° C. in a drying oven and then reweighed.
• solvent uptake (LM uptake), weight loss, and true swelling were calculated as follows.
• m- ⁇ weight of the empty petri dish (as a weighing aid)
• m 2 weight of the Petri dish with the sample before storage in water
• m 3 weight of the Petri dish with the sample after storage in water (7 days)
• m 4 weight of the Petri dish with the sample after re-drying at 80 ° C.
• a plate polymerization was carried out in chambers of glass plates with 5 mm round cord.
• the reaction mixtures were as under 1 .4. prepared and then filled into the prepared chambers. There they were allowed to cure at room temperature for about 2 hours. The Shore hardness was then measured according to ISO 868.
• Polyether polyols or natural polyols such as e.g. Castor oil the mechanical properties of the cured resin can be adjusted and varied. Long-chain
• Polyether polyols such as methacrylated (meth) iso-pol T35 lead to resins with low Shore hardness (sample 7).
• Short-chain polyether polyols such as methacrylic Iso-pol T400 lead by a higher crosslinking density to resins with high Shore hardness (Sample 8).
• Sample 2 shows the decrease in Shore hardness by using methacrylated Iso-Pol T35 compared to resins of pure methacrylated
• Sample 3 shows the increase in Shore hardness by using methacrylated Iso-Pol T400 compared to pure methacrylated castor oil resins (Sample 1).
• the polymerisation time of the resins is adjustable by adjusting the initiator and activator concentration (samples 3 and 6, graphs 1 and 2). If the activator or initiator concentration is reduced, the Polymerisationszeit extended. This allows resins with variable processing time to be presented according to the application.
• the systems can be used both unfilled and filled. With the addition of suitable fillers, the mechanical properties can be additionally influenced (Table 3).

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