This alkoxysilyl group-containing perfluoropolyether compound represented by formula (1) is soluble in saturated hydrocarbon solvents and yields a coating film having excellent water repellency and oil repellency.

X—Z-PFPE-Z—X  (1)

(PFPE denotes a divalent perfluoropolyether chain having a number average molecular weight of 500-5000; X denotes a group represented by formula (2);

##STR00001## Q.sup.1 denotes a divalent organic group having 2-12 carbon atoms; Q.sup.2 denotes a divalent organic group having 2-12 carbon atoms; R.sup.1 denotes an alkyl group having 1-12 carbon atoms; G denotes an alkyl group having 1-12 carbon atoms; a is 0-2; b is 1-3; c is 0-2; a, b and c are integers that satisfy the relationship a+b+c=3; d is an integer from 0 to 2; and the dotted line denotes a bond.)
(Z denotes a divalent organic group represented by any of the formulae below.)

##STR00002##

(A dotted line denotes a bond, and ** denotes a bonding site to the PFPE.)

This alkoxysilyl group-containing perfluoropolyether compound represented by formula (1) is soluble in saturated hydrocarbon solvents and yields a coating film having excellent water repellency and oil repellency.

X—Z-PFPE-Z—X  (1)

(PFPE denotes a divalent perfluoropolyether chain having a number average molecular weight of 500-5000; X denotes a group represented by formula (2);

##STR00001## Q.sup.1 denotes a divalent organic group having 2-12 carbon atoms; Q.sup.2 denotes a divalent organic group having 2-12 carbon atoms; R.sup.1 denotes an alkyl group having 1-12 carbon atoms; G denotes an alkyl group having 1-12 carbon atoms; a is 0-2; b is 1-3; c is 0-2; a, b and c are integers that satisfy the relationship a+b+c=3; d is an integer from 0 to 2; and the dotted line denotes a bond.)
(Z denotes a divalent organic group represented by any of the formulae below.)

##STR00002##

(A dotted line denotes a bond, and ** denotes a bonding site to the PFPE.)

A curable composition including a perfluoro(poly)ether group-containing silane compound having two or more Si atoms each bonding to at least one selected from a hydroxyl and hydrolyzable group, and a group represented by: —(OC.sub.6F.sub.12).sub.a—(OC.sub.5F.sub.10).sub.b—(OC.sub.4F.sub.8).sub.c—(OC.sub.3X.sup.10.sub.6).sub.d—(OC.sub.2F.sub.4).sub.e—(OCF.sub.2).sub.f—, wherein a, b, c and d are each independently an integer of 0 to 30, e and f are each independently an integer of 1 to 200, the sum of a, b, c, d, e and f is 5 or more, the occurrence order of the respective repeating units with the subscript a, b, c, d, e or f is not limited, a ratio of e to f is 1.0 or more, and each X.sup.10 is independently a hydrogen, fluorine or chlorine atom; an organosilicon compound having at least two —O—R.sup.g3(s) each bonding to a Si atom, wherein each R.sup.g3, at each occurrence, is independently a hydrogen atom or a monovalent organic group; and a catalyst.

A curable composition including a perfluoro(poly)ether group-containing silane compound having two or more Si atoms each bonding to at least one selected from a hydroxyl and hydrolyzable group, and a group represented by: —(OC.sub.6F.sub.12).sub.a—(OC.sub.5F.sub.10).sub.b—(OC.sub.4F.sub.8).sub.c—(OC.sub.3X.sup.10.sub.6).sub.d—(OC.sub.2F.sub.4).sub.e—(OCF.sub.2).sub.f—, wherein a, b, c and d are each independently an integer of 0 to 30, e and f are each independently an integer of 1 to 200, the sum of a, b, c, d, e and f is 5 or more, the occurrence order of the respective repeating units with the subscript a, b, c, d, e or f is not limited, a ratio of e to f is 1.0 or more, and each X.sup.10 is independently a hydrogen, fluorine or chlorine atom; an organosilicon compound having at least two —O—R.sup.g3(s) each bonding to a Si atom, wherein each R.sup.g3, at each occurrence, is independently a hydrogen atom or a monovalent organic group; and a catalyst.

A composition including: (a) at least one anionically stabilized acrylic polymer dispersion where the acrylic polymer contains acid monomer units; and (b) at least on polyamino siloxane relative to the weight of the total polymers in the composition, wherein the polyaminosiloxane copolymer containing steric stabilizing groups having a pendant group with a secondary or a primary amine functionality; and (ii) at least a portion of the silicon atoms in the polyaminosiloxane copolymer containing steric stabilizing groups having a pendant alkyl-poly(ethylene oxide) chain with 5 ethylene oxide units to 20 ethylene oxide units.

The disclosure relates to systems, methods and compositions for fabricating additive manufactured electronics having conductive and dielectric constituents comprising voids, using additive manufacturing. Specifically, the disclosure is directed to the fabrication of three-dimensional component having conductive and dielectric constituents comprising voids by using water soluble support ink, capable of undergoing all processing steps for fabricating the dielectric and conductive constituents.

There is provided an erosion protective polyurethane elastomer produced from a polyurethane composition with a polyisocyanate component and an isocyanate-reactive component. The polyisocyanate component has a first isocyanate-terminated prepolymer obtained from the reaction of a first polyol with 1,4-bis(isocyanatomethyl cyclohexane) (1,4-H6XDI) or with a mixture of 1,4-H6XDI and a second aliphatic diisocyanate, an aromatic diisocyanate, and/or an arylalkyl diisocyanate, with at least 50 wt. % of diisocyanate used to produce the prepolymer is aliphatic diisocyanate. The isocyanate-reactive component has at least two low molecular weight (Mw<400 g/mol) diols and a second polyol with hydroxyl groups to react with the prepolymer to produce a polyurethane elastomer. The polyurethane composition having a molar ratio of NCO/OH in the range of 1.00-1.50; whereby said polyurethane composition is curable to produce an elastomer having a mechanical strength >20 MPa, an elongation at break >500%, a tensile set <30%, and hydrolytic stability.

A poly(arylene ether) copolymer wherein the poly(arylene ether) copolymer is a product of oxidative copolymerization of monomers comprising a first monohydric phenol; a second monohydric phenol different from the first monohydric phenol; a siloxane oligomer; and optionally, at least one terminal functional group.

A poly(arylene ether) copolymer wherein the poly(arylene ether) copolymer is a product of oxidative copolymerization of monomers comprising a first monohydric phenol; a second monohydric phenol different from the first monohydric phenol; a siloxane oligomer; and optionally, at least one terminal functional group.

A poly(phenylene ether) copolymer comprising first repeating units comprising a C.sub.1-6alkyl(C.sub.6-30cycloalkenyl) pendant group; second repeating units different from the first repeating units; a copolymer of Formula (3); and optionally, at least one terminal functional group comprising (meth)acrylate, styrene, —CH.sub.2—(C.sub.6H.sub.4)—CH═CH.sub.2, allyl, cyanate ester, glycidyl ether, anhydride, aniline, maleimide, an activated ester, or a combination thereof.

##STR00001##