摘要:
Fluorinated cyclic organic silicon compounds of the general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are independently selected from alkyl groups having 1 to 6 carbon atoms and n is an integer of from 1 to 6 are novel and susceptible to ring-opening polymerization to form chain siloxane polymers having improved properties. The cyclic compounds are produced by reacting disiloxane diols with fluorinated organic silicon compounds in the presence of amine catalysts.
摘要:
The present room temperature curing composition comprises an organopolysilethylenesiloxane represented by the following general formula: ##STR1## wherein R.sup.1 to R.sup.4 each represent an alkyl having up to 8 carbon atoms or a phenyl group and n is an integer of 10 or above, and an organosilane or an organosiloxane having two or more hydrolyzable groups such as alkoxy groups in the molecule. The composition can form a cured product high in rubber strength and excellent in chemical resistance.
摘要:
The fluorine-containing organosilicon compound of the present invention is represented by the following formula: ##STR1## wherein Rf is a perfluoroalkyl group. This compound is quite useful as a raw material for the production of polysilethylenesiloxanes excellent in solvent resistance.
摘要:
The present polysilethylenesiloxane is a liquid polymer represented by the following general formula: ##STR1## wherein R.sup.1 and R.sup.2 each represent a lower alkyl group and R.sup.3 and R.sup.4 each represent a perfluoroalkylethyl group, and n is an integer of 10 to 1,000. This polymer is quite useful as a major component of elastomer compositions having chemical resistance, electrical properties, and high strength.
摘要:
A purification method of a fluorine-containing alkylethylene comprises reacting the fluorine-containing alkylethylene with powdered metallic zinc in the presence of an aqueous acetic acid solution. By this method, fluorine-containing alkyl iodide and fluorine-containing alkylethyl iodide, contained as impurities in the fluorine-containing alkylethylene, can be removed effectively, for example, to a level of 1 ppm or below.
摘要:
An organosilicon compound having the general formula (I): ##STR1## wherein R.sup.1 represents the methyl group or the ethyl group, R.sup.2 represent an alkyl group having from 1 to 4 carbon atoms, and n represents an integer of from 1 to 3. This compound is useful in preparing room temperature vulcaniazable organopolisiloxane compositions which have good storage stability, and release no smelly or corrosive condensation by-product on curing.
摘要:
A class of novel organosilane compounds are disclosed as represented by the general formulaRSi(OCH.sub.2 CF.sub.3).sub.3,in which R is an atom or group selected from the class consisting of a hydrogen atom, unsaturated monovalent aliphatic hydrocarbon groups having from 2 to 20 carbon atoms, monovalent aryl groups and monovalent organic groups having from 3 to 20 carbon atoms and containing at least one hetero atom, i.e. an atom other than carbon and hydrogen atoms, such as oxygen, halogens, sulfur and nitrogen, the said hetero atom-containing organic group being bonded to the silicon atom through a carbon-to-silicon linkage. Several particular compounds belonging to the class were synthesized and identified.
摘要:
A fluorine-containing organopolysiloxane represented by the following average compositional formula (1) (Z2Q)βRf(QZ1Aα)2-β (1) wherein Rf is a divalent group containing a perfluoroether residue, Q is a divalent organic group, Z1 is a di- to nona-valent organopolysiloxane residue and may contain a silalkylene bond, α is an integer of from 1 to 8, β is a number larger than 0 and smaller than 2, Z2 is a monovalent group represented by the following formula (2) wherein b is an integer of from 1 to 10, R1 may be the same with and different from each other and is an alkyl group having 1 to 4 carbon atoms or a phenyl group, and A is a monovalent group represented by the following formula (3) wherein R2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, a is 2 or 3, and c is an integer of from 1 to 6.
摘要:
An organopolysiloxane represented by the following general formula (A), (B) or (C) SinR12n+2On−1 (A) SinR12nOn (B) SinR12n+2R2kOn−k (C) wherein R1 may be the same with or different from each other and is a hydrogen atom or a monovalent organic group, R2 is an alkylene group having 2 to 6 carbon atoms, n is an integer of from 2 to 40 and k is an integer of 1 to 3, characterized in that at least two R1's are represented by the following formula (i): wherein X is a hydrolyzable group, R3 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, y is an integer of from 1 to 5 and a is 2 or 3; and one SiR1 bond is represented by the following formula (ii) or one SiOSi bond is replaced with a bond represented by the following formula (iii): SiQRf1 (ii) SiQRf2QSi (iii) wherein Rf1 is a monovalent group containing a perfluoroether residue, Rf is a divalent group containing a perfluoroether residue, and Q is a divalent organic group.
摘要:
Fluorinated organosilicon compounds having formula (1) wherein Rf is a perfluoroalkyl group containing at least one ether bond, Q is a polyether group in the form of a homopolymer chain of ethylene glycol or propylene glycol or a copolymer chain of both, R is hydrogen or alkyl, X is a divalent linking group exclusive of oxygen atom, Y is a divalent linking group, p is an integer of at least 3, and n is a number of 0