A polythioether prepolymer including functional groups capable of being obtained by the reaction: of at least one compound T having a number f of thiol functional group number selected from 2, 3, 4 and 6, with at least one compound E having a number g of epoxy functional groups number selected from 2 and 3. Also, a method of preparation for this prepolymer, a composition including this prepolymer and an oligomer as well as its use as a mastic and a polythioether polymer obtained from this polythioether prepolymer with an oligomer.

A polythioether prepolymer including functional groups capable of being obtained by the reaction: of at least one compound T having a number f of thiol functional group number selected from 2, 3, 4 and 6, with at least one compound E having a number g of epoxy functional groups number selected from 2 and 3. Also, a method of preparation for this prepolymer, a composition including this prepolymer and an oligomer as well as its use as a mastic and a polythioether polymer obtained from this polythioether prepolymer with an oligomer.

The present invention relates to processes for making macromolecular networks, macromolecular networks made by such processes, and methods of using such macromolecular networks. Such process employs a low amount of amine compound as a reaction accelerant. The rates of chemical reaction are thereby easily controlled over several orders of magnitude, permitting efficient catalysis and control of reaction conditions needed to produce thermochemically stable macromolecular networks.

A two-part curable composition comprises: a Part A component comprising polythiol having a thiol group functionality of at least two, and tertiary amine accelerator; and a Part B component comprising polyene comprising at least two of non-aromatic C—C double bonds, C—C triple bonds, or a combination thereof and organic peroxide curative. At least one of the polythiol or the polyene comprises a respective reaction product of reaction components comprising: HSR.sup.1O(CH.sub.2CHR.sup.2O).sub.aR.sup.1SH wherein each R.sup.1 independently represents an alkyl group having from 2 to 12 carbon atoms, each R.sup.2 independently represents H or CH.sub.3, and a represents an integer from 1 to 20; triallyl isocyanurate; H.sub.2═CHOR.sup.1O(CH.sub.2CHR.sup.2O).sub.aR.sup.1OCH═CH.sub.2; and. A method of making a curable composition comprises combining the Part A and Part B components of the two-part curable composition. Methods of sealing a substrate and adhering two substrates, and articles made thereby are also disclosed. (Formula AA)

##STR00001##

A composition comprising at least one terminally-unsaturated diarylsulfide compound represented by the formula: wherein each R represents an allyl group or a propargyl group. The composition may further comprise an organic polythiol, and optionally a free-radical initiator, and may be formulated as a two-part polymerizable composition. Methods of polymerizing the compositions are also disclosed. ##STR00001##

A composition comprising at least one terminally-unsaturated diarylsulfide compound represented by the formula: wherein each R represents an allyl group or a propargyl group. The composition may further comprise an organic polythiol, and optionally a free-radical initiator, and may be formulated as a two-part polymerizable composition. Methods of polymerizing the compositions are also disclosed. ##STR00001##

A photocurable composition contains:

a component (A): (meth)acrylic acid ester having 2 to 6 (meth)acryloyl groups in one molecule,

a component (B): a thiol compound having 2 to 4 thiol groups in one molecule, and

a component (C): a photobase generator,

in which a mass ratio of the component (A) to the component (B) is 66:34 to 33:67, inclusive,

a functional group equivalent of the component (A) is 96 g/eq to 180 g/eq, inclusive,

a functional group equivalent of the component (B) is 95 g/eq to 190 g/eq, inclusive, and

a content of the component (C) is 0.5 parts by mass to 2 parts by mass with respect to 100 parts by mass of a total of the component (A), the component (B), and the component (C).

A photocurable composition contains:

a component (A): (meth)acrylic acid ester having 2 to 6 (meth)acryloyl groups in one molecule,

a component (B): a thiol compound having 2 to 4 thiol groups in one molecule, and

a component (C): a photobase generator,

in which a mass ratio of the component (A) to the component (B) is 66:34 to 33:67, inclusive,

a functional group equivalent of the component (A) is 96 g/eq to 180 g/eq, inclusive,

a functional group equivalent of the component (B) is 95 g/eq to 190 g/eq, inclusive, and

a content of the component (C) is 0.5 parts by mass to 2 parts by mass with respect to 100 parts by mass of a total of the component (A), the component (B), and the component (C).

Bio-electronic devices including a substrate layer composed of a thiol-ene shape memory polymer, the polymer including, a sequential chain of a first type of monomer covalently bonded to a second type of monomer via thiol-ene linkages that form a backbone of the polymer, and. at least one patterned gold interconnect line adhered to the substrate layer.

Bio-electronic devices including a substrate layer composed of a thiol-ene shape memory polymer, the polymer including, a sequential chain of a first type of monomer covalently bonded to a second type of monomer via thiol-ene linkages that form a backbone of the polymer, and. at least one patterned gold interconnect line adhered to the substrate layer.