Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from ##STR2## wherein R.sub.

Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula:(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.

Abstract: Thermoplastic, crystalline block copolymers are disclosed, each comprising a plurality of recurring units selected from the group consisting of those of the structural formulae F.sub.1 and F'.sub.1, and combinations thereof:F.sub.1 : --A [SiR.sub.2 (GSiR.sub.2).sub.a ASiR.sub.2 G'SiR.sub.2 A].sub.p SiR.sub.2 (GSiR.sub.2).sub.a ASiR.sub.2 (OSiR.sub.2).sub.n ]andF'.sub.1 : --A [SiR.sub.2 G'SiR.sub.2 ASiR.sub.2 (GSiR.sub.2).sub.a A].sub.p SiR.sub.2 G'SiR.sub.2 ASiR.sub.2 (OSiR.sub.2).sub.

Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from: --NO.sub.

Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.

Abstract: Novel organosilicon compounds containing various functional groups and processes for their preparation are disclosed. The compounds are silanes represented by the following general formula: ##STR1## wherein R represents a hydrocarbon radical containing a carbon-carbon double bond; R.sub.1 represents a hydrocarbon radical; G represents a divalent carbocyclic aromatic or heterocyclic radical; Y represents a group such as Cl, COCl, or COOH; and, n represents an integer equal to 1 or 2.

Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;M is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.

Abstract: Novel polysiloxane thermoplastic elastomers and processes for their preparation are disclosed. The elastomers are obtained by reaction of .alpha.,.omega.-dihydrogenpolysiloxane with a diethylene silicon compound.

Abstract: Organopolysiloxanes are polymerized in the presence of an alkaline catalyst and a complex oxygen, sulfur or nitrogen heterocyclic compound.

Abstract: An organopolysiloxane composition is disclosed which is transformable into elastomers by heating without using any vulcanizing agent. These compositions comprise:[1] 100 parts by weight of at least one hydroxylated polydiorganosiloxane having a viscosity of between about 2.multidot.10.sup.5 and about 80.multidot.10.sup.6 cps at 25.degree. C. and containing 0.001 to 0.1% by weight of terminal hydroxy groups per weight of the polysiloxane;[2] at least 10 parts by weight of silica having a special surface of between about 100 and about 400 m.sup.2 /g; and[3] 0.5 to 15 parts by weight of at least one silane of the formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and represent methyl or ethyl.

Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+ l) possess from 1 to 30 carbon atoms;m is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.

Abstract: A heat resistant heat-curable polymer composition obtained by reacting, between 50.degree. C. and 350.degree. C., (a) an oligomer having the average general formula: ##STR1## in which x represents a number from 0.1 to about 2, R represents a divalent hydrocarbon radical with 1 to 8 carbon atoms, which is derived from an aldehyde or a ketone of the general formula:O.dbd.Rin which the oxygen atom is bonded to a carbon atom of the radical R, and T represents a divalent organic radical possessing 2 to 24 carbon atoms, the free valencies of which are on adjacent carbon atoms and which is derived from an internal anhydride of the general formula: ##STR2## at least 60% of the T radicals in the oligomer containing a polymerizable carbon-carbon double bond, with (b) a polyamine of the general formula:Q(NH.sub.2).sub.yin which y represents an integer at least equal to 2 and Q represents an organic radical of valency y, the relative amounts being such that the oligomer supplies 1.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree. C and 350.degree. C, a bisimide of the general formula: ##STR1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:R (NH.sub.2).sub.xin which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula:G -- CH .dbd. N -- N .dbd. CH -- Gin which G represents a monovalent aromatic radical, and a polymerizable monomer other than a bis-imide, containing at least one polymerizable vinyl, maleic, allyl or acrylic --CH .dbd. C< group in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins comprise three-dimensional recurring units of the general formula: ##STR1## in which, in any particular recurring unit: A IS ZERO OR AN INTEGER FROM 1 TO 5; ##STR2## denotes a radical of the general formula ##STR3## p1 in which Y represents H, CH.sub.3 or Cl; G denotes a monovalent aromatic radical; andA denotes a divalent organic radical possessing at least two carbon atoms,Such that there are on average, at least 4.4 and at most about ##STR4## radicals per ##STR5## radical, and optionally, units and/or molecules of the general formula ##STR6## IN WHICH: T denotes a monovalent organic radical;T.sub.1 denotes a radical of the general formula: ##STR7## or a radical of the general formula: ##STR8## b is zero or an integer from 1 to 4; AND A, D.sub.

Abstract: Linear homopolymers of 3,5,5-trimethyl-5-sila-.delta.-valerolactone are crosslinked through the 5-methyl group, e.g. by heating with an organic peroxide, to give polymers. Films of these crosslinked polymers have a critical surface tension similar to Teflon and can be used for water proofing. The films also exhibit selective permeability to gases and can be used to reduce the CO.sub.2 content of CO.sub.2 /O.sub.2 mixtures.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree. C and 350.degree. C, a bis-imide of the general formula: ##STR1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:R (NH.sub.2).sub.xin which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula:G -- CH = N -- N = CH -- Gin which G represents a monovalent aromatic radical, in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.2 represents the number of mols of polyamine employed and N.sub.3 represents the number of mols of alazine employed, the ratio ##EQU1## is at least 1.3, x being defined as above.

Abstract: A heat resistant heat-curable polymer composition obtained by reacting, between 50.degree. C. and 350.degree. C., (a) an oligomer having the average general formula: ##STR1## in which x represents a number from 0.1 to about 2, R represents a divalent hydrocarbon radical with 1 to 8 carbon atoms, which is derived from an aldehyde or a ketone of the general formula:O=Rin which the oxygen atom is bonded to a carbon atom of the radical R, and D represents a divalent organic radical possessing 2 to 24 carbon atoms, the free valencies of which are on adjacent carbon atoms and which is derived from an internal anhydride of the general formula: ##STR2## at least 60% of the D radicals in the oligomer containing a polymerizable carbon-carbon double-bond, with (b) a polyamine of the general formula:Q(NH.sub.2).sub.yin which y represents an integer at least equal to 2 and Q represents an organic radical of valency y, the relative amounts being such that the oligomer supplies 1.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree. C, which resins comprise three-dimensional recurring units of the general formula: ##STR1## in which, in any particular recurring unit: A IS ZERO OR AN INTEGER FROM 1 TO 5; ##STR2## denotes a radical of the general formula ##STR3## in which Y represents H, CH.sub.3 or Cl;G denotes a monovalent aromatic radical; andA denotes a divalent organic radical possessing at least two carbon atoms,Such that there are on average, at least 4.4 and at most about 20>D.sub.1 < radicals per ##STR4## radical, and optionally, units and/or molecules of the general formula ##STR5## in which: T denotes a monovalent organic radical;T.sub.1 denotes a radical of the general formula: ##STR6## or a radical of the general formula: ##STR7## b is zero or an integer from 1 to 4; and A, D.sub.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree.C, which resins comprise three-dimensional recurring units of the general formula: ##EQU1## in which, in any particular recurring unit: A IS ZERO OR AN INTEGER FROM 1 TO 5; ##EQU2## denotes a radical of the general formula ##EQU3## in which Y represents H, CH.sub.3 or Cl; G denotes a monovalent aromatic radical; andA denotes a divalent organic radical possessing at least two carbon atoms,Such that there are on average, at least 4.4 and at most about 20>D.sub.1 < radicals per ##EQU4## radical, and optionally, units and/or molecules of the general formula ##EQU5## IN WHICH: T denotes a monovalent organic radical;T.sub.1 denotes a radical of the general formula: ##EQU6## or a radical of the general formula: ##EQU7## b is zero or an integer from 1 to 4; and A, D.sub.

Abstract: Cross-linked resins of good thermal stability useful inter alia for making multicellular materials, for bonding metals, and for making laminates and moulded articles are made by reacting, e.g. by heating together, an unsaturated bis-imide with a diprimary diamine in a ratio of 1.2:1 to 50:1.