On the other hand, the condensation-curable silicone resin mixture can be cured under curing conditions not tightly controlled. Cross-linking technology here is based on reaction between Si-OH groups and/or hydrolysable Si-X groups in the presence of moisture. The number of moles of a carbamate group (NHCOO), which is a functional group contained in the adhesion-imparting agent according to the present invention, i.e., the functional group equivalent, can be calculated from the amino group equivalent of the amino group-containing silicone compound. The present invention also aims to provide a condensation-curable silicone resin cured product formed from the condensation-curable silicone resin composition and a sealed optical semiconductor element formed by using the condensation-curable silicone resin composition. A condensation-curable silicone resin composition comprising: a condensation-curable silicone resin mixture; and an adhesion-imparting agent, the adhesion-imparting agent including a compound that includes a structural unit represented by the formula (1-3) and/or a structural unit represented by the formula (1-4) between a structural unit represented by the formula (1-1) and a structural unit represented by the formula (1-2): Click for automatic bibliography To the solution were added 50 g of chlorobenzene and 50 g of water, and phase separation was performed. Reaction of the amino group-containing silicone compound with the cyclic carbonate compound is carried out preferably at a temperature in the range of 40° C. to 180° C. depending on the solvent to be used, more preferably at a temperature in the range of 80° C. to 160° C. without using a solvent. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, and lead are below it. The organic phase was condensed to give 9.3 g of a transparent liquid (adhesion-imparting agent A). The present invention aims to provide a condensation-curable silicone resin composition with excellent adhesion properties. Set Descending Direction. The silicone composite studied was composed of 94.6 mol% Dimethoylsiloxane, 5.1 mol% diphenylsiloxane, and 0.3 mol% methyl-vinyl siloxane (which formed crosslinking after a peroxide cure). R1a's in the formulas (3-1) and (3-2) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group. Examples of the cycloalkyl group represented by R1b include cyclopentyl, cyclohexyl, cycloheptyl, and methylcyclohexyl. DE102009028140A1 - Condensation crosslinking silicone compositions - Google Patents Condensation crosslinking silicone compositions Download PDF Info Publication number DE102009028140A1. If the functional group equivalent in the formula (2) of the adhesion-imparting agent according to the present invention is less than 100, adhesion appropriate for the functional group equivalent in the group represented by the formula (2) may not be obtained or compatibility with the condensation-curable silicone resin mixture may decrease. If hydrophilic, good compatibility with gypsum. The structural units represented by the formulas (1-1) and (1-2) mean molecular ends. Some common causes. R1a's in the formulas (1-1) and (1-2) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group. A condensation-reaction curable silicone rubber composition is provided to form a cured material having excellent antistatic properties while maintaining insulating properties. Polydimethyl siloxane (hydroxy terminated), Colloidal silica or micro sized metal oxide filler. There can be provided a condensation-curable silicone resin composition that can quickly provide a cured product having high heat resistance and light resistance. In order to solve these problems of adhesion, blending of adhesion-imparting agents such as silane coupling agents is usually suggested. In particular, R1b is preferably a C1-C18 alkyl group or an aryl group, more preferably methyl or phenyl. The objective of the present invention is to provide a condensation reaction-type silicone composition which has excellent initial curability and provides a cured product that exhibits adhesion with excellent toughness, while having good cracking resistance, void resistance and heat resistance. A curable silicone composition that cures at room temperature into a highly water-repellent, highly oil-repellent film is obtained from a composition of (A) an organopolysiloxane resin with the following average unit formula R.sub.a (ZO).sub.b SiO.sub. Further, a condensation-curable silicone composition also has (B) an organopolysiloxane having a network structure and represented by formula (2). A 50-mL four-necked flask equipped with a magnetic stir bar, a thermometer, and a condenser was charged under a nitrogen atmosphere with 5.0 g (amino group 2.27 mmol) of a silicone compound containing phenyl and amino groups (“X-22-1660B-3” produced by Shin-Etsu Chemical Co., Ltd, amino group equivalent 2,200 g/mol) and 1.0 g (11.4 mmol) of ethylene carbonate (molecular weight 88.06). Only a proper dental Checkup by a professional in person can help diagnose the problem you are suffering from and help give you the required treatment. Condensation silicon is the first silicon material ever used in dentistry. Show. Current Assignee. medium viscosity – 35-75 % A siloxane is a functional group in organosilicon chemistry with the Si−O−Si linkage. The condensation-curable silicone resin composition of the present invention includes, as an adhesion-imparting agent, a silicone compound having a structural unit represented by the formula (1-3) and/or a structural unit represented by the formula (1-4) between a structural unit represented by the formula (1-1) and a structural unit represented by the formula (1-2) (hereinafter, also referred to as “the adhesion-imparting agent according to the present invention”). The resulting test piece for hardness measurement was measured for hardness (Type A) using a hardness tester for rubber and plastics (“KR-24A” produced by KORI SEIKI MFG. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor. The two-component condensation-curable silicone resin mixture may be of alcohol type or acetone type. To the solution were added 50 g of chlorobenzene and 50 g of water, and phase separation was performed. Another aspect of the present invention relates to a condensation-curable silicone resin cured product prepared by curing the condensation-curable silicone resin composition of the present invention. Weblio 辞書 > 英和辞典・和英辞典 > condensation siliconeの意味・解説 > condensation siliconeに関連した英語例文 例文検索の条件設定 「カテゴリ」「情報源」を複数指定しての検索が可能になりました。 If you have any doubts feel free to contact me or comment in the post, thanks for visiting. The present invention provides a heat-curable silicone rubber composition capable of giving a stable and high antistatic property for a long time without degrading inherent properties of a silicone rubber, such as thermal stability. wherein R1a's in the formulas (1-1) and (1-2) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group; R1b's in the formulas (1-3) and (1-4) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group; m in the formula (1-3) is an integer of 1 to 50; n in the formula (1-4) is an integer of 1 to 1500; and A's in the formulas (1-1) to (1-3) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, or a group represented by the formula (2), provided that at least one of A's in the formulas (1-1) to (1-3) is a group represented by the formula (2): wherein R2a represents a C1-C8 alkylene group in which a carbon atom other than a carbon atom bonded to a silicon atom is optionally partially substituted with an oxygen atom; R2b's each independently represent a C1-C3 alkylene group; R3's each independently represent a C1-C3 alkylene group; R4's each independently represent a hydrogen atom, a C1-C3 alkyl group, an OH group-containing C1-C3 alkyl group, or a halogeno group; and x is an integer of 0 to 2. A solvent to be used is preferably an appropriately polar solvent easily dissolving the amino group-containing silicone compound. Examples of the aryl group represented by R1a include phenyl, tolyl, xylyl, ethylphenyl, and naphthyl. Putty-wash method is technique sensitive. The former can also be heat accelerated for faster curing. Cure types,basic formulations,applications,catalyst types and blending methods will all be discussed. B. 2,947,771, and U.S. Pat. Furthermore, the present invention can provide a condensation-curable silicone resin cured product formed from the condensation-curable silicone resin composition and a sealed optical semiconductor element formed by using the condensation-curable silicone resin composition. The platinum catalyst used in addition cure silicones is susceptible to some chemicals like nitrogen, sulphur, phosphorus, … Also known as conventional silicones. Know the properties and uses of common synthetic condensation polymers. Silicone Condensation 20 (Medium Hard) Description This silicone has a good fluidity and gives great detail while still remaining strong.The silicone Condensation 20 A + B is a 2-component (poly-condensation curing) castable molding silicone which cures at room temperature. The functional group of the adhesion-imparting agent according to the present invention is a carbamate group (NHCOO). © 2004-2021 FreePatentsOnline.com. The silicone compositions can be silicone sealant compositions. The adhesion-imparting agent according to the present invention is preferably one in which, in the formula (2), R3 represents methylene and R4's each independently represent a hydrogen atom or hydroxymethyl in terms of compatibility with the condensation-curable silicone resin mixture or material availability. As the adhesion-imparting agent E in Table 1, glycidoxypropyltrimethoxysilane (“Z-6040” produced by Dow Corning Toray Co., Ltd) was used. The contents were heated to 120° C. and stirred using a magnetic stirrer for 15 hours. B's in the formulas (3-1) to (3-3) each independently represent a C1-C18 alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, or a group represented by the formula (5), provided that at least one of B's in the formulas (3-1) to (3-3) is a group represented by the formula (5). the adhesion-imparting agent including a compound that includes a structural unit represented by the formula (1-3) and/or a structural unit represented by the formula (1-4) between a structural unit represented by the formula (1-1) and a structural unit represented by the formula (1-2): The present invention is described in detail below. In particular, phenyl is preferred. Composite Materials; Silicones; Summary; Contributors and Attributions; Learning Objectives. COMPOSITION Supplied as two paste system: • Base paste: • Hydroxyterminated polysiloxane polymer • Filler (cristobalite, talc, starch) • Catalyst: – Liquid catalyst: • Cross-linking agent (e.g tetraethoxy silane) + • Activator (dibutyl-tin dilaurate) – Paste catalyst: • Cross-linking agent, activator, inert oil • Filler 8 CONDENSATION SILICONE IMPRESSION MATERIAL Cross-linking technology here is based on reaction between Si-OH groups and/or hydrolysable Si-X groups in the presence of moisture. The parent siloxanes include the oligomeric and polymeric hydrides with the formulae H(OSiH 2) n OH and (OSiH 2) n. Siloxanes also include branched compounds, the defining feature of which is that each pair of silicon centres is separated by one oxygen atom. Examples of the C1-C18 alkyl group represented by R1a include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl, tert-pentyl, n-hexyl, n-heptyl, 2,2,4-trimethylpentyl, n-octyl, isooctyl, n-nonyl, n-decyl, and n-dodecyl. A condensation-reaction curable silicone rubber composition is provided to form a cured material having excellent antistatic properties while maintaining insulating properties. The condensation-curable silicone resin composition of the present invention can be cured at room temperature or by heating. Examples of the aryl group represented by R1b include phenyl, tolyl, xylyl, ethylphenyl, and naphthyl. Addition Silicones – Addition silicones are the most popular type of elastomeric impression mat erial, especially for crown and bridge impressions. Then, the reaction solution was transferred to a 200-mL four-necked flask equipped with a stirrer, a thermometer, and a condenser. It is relatively unreactive. Condensation-curable silicone resin composition, condensation-curable silicone resin cured product, and sealed optical semiconductor element Updated Time 12 June 2019 Patent Registration Data. Here, when m and/or n represents 2 or more, R1b's in repeating units are the same as or different from one another. Condensation silicone Base Polydimethyl siloxane (hydroxy-terminated) Colloidal silica or microsized metal oxide (filler) 35-75% Color pigments Accelerators Orthoethyl silicate – cross linking agent Stannous octoate - catalyst 23. Therefore, curing conditions need to be tightly controlled. The remaining amino groups were confirmed to be less than 1% by neutralization titration. This paper will give an overview of the basic technology and classes of silicone fluids. The resulting cured product was released from the mold, and formed into a test piece for hardness measurement with a radius of 20 mm and a thickness of 6 mm. Most of these problems can be rectified by bringing silicone up to room temperature, then mechanically mixed with a mixer drill and paint paddle for a period of time. Reinforcing fillers The most frequently used reinforcing filler is pyrogenic silica with very high BET surface areas (higher than 100 m²/g). US9150755B2 - Silicone composition that can be cross-linked by means of dehydrogenative condensation in the presence of a carbene-type catalyst - Google Patents Dimensional stability – high curing shrinkage. 3,355,424, U.S. Pat. 3,890,269. (Minneapolis, MN, US). Then, the reaction solution was transferred to a 200-mL four-necked flask equipped with a stirrer, a thermometer, and a condenser. They are silicones designed for the impression of fixed prosthesis by its high density after the polymerization. Addition cure silicones offer exceptional heat resistance and work better in high temperatures than condensation cure silicone. Examples of the electronic materials include supporting members such as a lead frame, a wired tape carrier, a wiring board, glass, and silicon wafer; an optical semiconductor device; active elements such as a semiconductor chip, a transistor, a diode, and a thyristor; passive elements such as a capacitor, a resistor, and a coil. Polydimethyl siloxane (hydroxy terminated) Colloidal silica or micro sized metal oxide filler; putty viscosity – 60-70%; medium viscosity – 35-75 % It is not intended to replace your Dental Visit. b) Stood for a long time. The present invention is a condensation-curable silicone resin composition including: a condensation-curable silicone resin mixture; and an adhesion-imparting agent, the adhesion-imparting agent including a compound that includes a structural unit represented by the formula (1-3) and/or a structural unit represented by the formula (1-4) between a structural unit represented by the formula (1-1) and a structural unit represented by the formula (1-2): SUMITOMO SEIKA CHEMICALS CO., LTD. (Hyogo, JP), HAMRE, SCHUMANN, MUELLER & LARSON, P.C. The case in which x is 0 means the case in which R2a is directly bonded to a NH group. For example, Patent Literature documents 1 and 2 disclose methods of blending a silane coupling agent containing an amino group or a glycidyl group, and Patent Literature 3 discloses a method for improving adhesion to a base material by using a silane coupling agent containing an urea bond. 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