An adhesive for joining metals and resins is disclosed. The adhesive comprises 0.0001˜3 wt. % of amino silane, 0.0001˜1 wt. % of a crosslinker and 0.0001˜3 wt. % of an organometallic compound. In particular, the adhesive forms an adhesive layer that has a metal atomic ratio less than 50%.

Polyorganosiloxanes and methods for their preparation are disclosed. The polyorganosiloxanes are useful in curable compositions. The polyorganosiloxanes may have up to 9 silicon bonded hydrogen atoms, or other curable groups, per molecule.

Polyorganosiloxanes and methods for their preparation are disclosed. The polyorganosiloxanes are useful in curable compositions. The polyorganosiloxanes may have up to 9 silicon bonded hydrogen atoms, or other curable groups, per molecule.

Silicone polyoxamide and silicone polyoxamide-hydrazide copolymers comprise at least two repeating units of formula (I). In this formula, each R.sup.1 is independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each Y is independently an alkylene, aralkylene, or a combination thereof; each G is independently a bond or a divalent residue equal to a diamine of formula R.sup.3HN—G—HR.sup.3 minus the two —NHR.sup.3 groups; each R.sup.3 is independently hydrogen or alkyl or R.sup.3 taken together with G and with the nitrogen to which they are both attached form a heterocyclic group; each n is independently an integer of 0 to 300; each p is independently an integer of 1 to 25, and the average of p is 1.3 or greater; and each q is independently an integer of 1 to 2, and the average of q is no greater than 1.05.

##STR00001##

Silicone polyoxamide and silicone polyoxamide-hydrazide copolymers comprise at least two repeating units of formula (I). In this formula, each R.sup.1 is independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each Y is independently an alkylene, aralkylene, or a combination thereof; each G is independently a bond or a divalent residue equal to a diamine of formula R.sup.3HN—G—HR.sup.3 minus the two —NHR.sup.3 groups; each R.sup.3 is independently hydrogen or alkyl or R.sup.3 taken together with G and with the nitrogen to which they are both attached form a heterocyclic group; each n is independently an integer of 0 to 300; each p is independently an integer of 1 to 25, and the average of p is 1.3 or greater; and each q is independently an integer of 1 to 2, and the average of q is no greater than 1.05.

##STR00001##

A composition contains an organopolysiloxane having the following average chemical structure: X.sub.3SiO—SiR.sub.2—R′—(R.sub.2SiO).sub.x—R.sub.2Si—[R.sup.b—(R.sub.2SiO).sub.y—R.sub.2Si—R.sup.b′—(R.sub.2SiO).sub.z—R.sub.2Si].sub.m—R′—R.sub.2SiO—SiX.sub.3; where X is —OSiR.sub.2—R′—R.sub.2SiO—R.sub.2Si—R″-A; R is an alkyl group having from 2 to 6 carbons and aryl groups; R′, R″, R.sup.b and R.sup.b′ are divalent hydrocarbon groups comprising a chain of 2 to 6 methylene units; A is acrylate, methacrylate or trialkoxysilyl; provided that, on average, 60 to 90 mole-percent of the A groups are acrylate and methacrylate; Subscript m has an average value in a range of zero to 10; Subscripts x, y and z each has an average value in a range of zero to 1200; and provided that the average values of m, x, y and z are such that the sum of the average values for x, y and z is in a range of 300-1200 and the molar ratio of methylene units to siloxane units is less than 0.15.

A composition contains an organopolysiloxane having the average chemical structure (I):
[R′R.sub.2SiO—(R.sub.2SiO).sub.m].sub.3—Si—[OSiR.sub.2].sub.n—Y—Si(OR).sub.3  (I)
where: R is independently in each occurrence selected from alkyl, aryl, substituted alkyl and substituted alkyl groups having from one to 8 carbon atoms; R′ is independently in each occurrence selected from R and terminally unsaturated alkylene groups having from 2 to 6 carbon atoms; Y is selected from a group consisting of: X, and X—(R.sub.2SiO).sub.pSiR.sub.2—X; where p has an average value in a range of one to 3; and X is independently in each occurrence selected from alkylene and substituted alkylene groups having from one to 6 carbon atoms; and the average values for subscripts m and n are each greater than zero and independently selected so that the average value for the sum of all of the average m values and the average n value is in a range of 30-200.

Hyperbranched polydiorganosiloxane polyoxamide polymers are formed from reaction mixtures containing AX.sub.g and BZ.sub.m compounds where either A or B is a siloxane-based group, and each X is either an oxalylamino-functional group or an amino-functional group, and each Z is either an amino-functional group or an oxylamino-functional group, such that upon reaction X and Z form an oxamide bond.

Hyperbranched polydiorganosiloxane polyoxamide polymers are formed from reaction mixtures containing AX.sub.g and BZ.sub.m compounds where either A or B is a siloxane-based group, and each X is either an oxalylamino-functional group or an amino-functional group, and each Z is either an amino-functional group or an oxylamino-functional group, such that upon reaction X and Z form an oxamide bond.

A radiation curable article includes a silicone composition including a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer comprises at least one alkenyl group and at least one hydride group, the radiation curable silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure. Further included is a method of forming a radiation curable article includes providing a silicone composition including a silicone oligomer and a photoactive catalyst, wherein the silicone oligomer includes at least one alkenyl group and at least one hydride group, the silicone oligomer having a viscosity of less than about 100,000 centipoise prior to cure; and irradiating the silicone composition with a radiation source.