Treatment of resin surfaces to improve adhesive bonding, adhesive bonding process and resin bodies with treated surfaces

Claim 2

The process as defined in claim 2 in which said organic isocyanate and said photosensitizer are applied to said surface in a common solution.

Claim 3

The process as defined in claim 3 where said solution contains at least about 2 percent of photosensitizer and at least about 0.25 percent or organic isocyanate.

Claim 4

The process as defined in claim 3 in which said organic isocyanate is present in amounts of from about 1 percent to about 10 percent by weight based on the weight of the solution and in which the solvent is volatile liquid photosensitizer.

Claim 5

The process as defined in claim 3 in which said solution also contains an adhesive.

Claim 6

The process as defined in claim 4 in which said solution contains at least about 2 percent by weight of photosensitizer, from about 1 to about 10 percent by weight of an organic isocyanate and contains a resinous adhesive.

Claim 7

The process as defined in claim 8 in which said adhesive is selected from the group consisting of polyether glycol urethanes, polyester glycol urethanes, resinous polyepoxides, resinous polyesters from condensation and polymerization of at least one dibasic organic acid an at least one glycol and resinous polyesters from polymerization of lactones.

Claim 8

The process for bonding a body of a polymer resin having at least some hydrogen on a carbon chain in a repeating unit in the polymer chain to another surface comprising the steps of supplying a photosensitizer and a organic isocyanate at the surface to be bonded of said body, thereafter while sad isocyanate is on said surface radiating said surface with ultraviolet to for a urethane stratum at said surface integral with the polymer resin of said body, assembling said body with said surface against the surface of a second body with adhesive at the joint between said surfaces and hardening the adhesive to bond said bodies firmly together.

Claim 9

The process as defined in claim 9 in which said organic isocyanate and said photosensitizer are supplied to the surface of said body of polymer resin in a common solution and in which said radiation provides at least about 300 watt seconds per square foot at a wavelength of from 2,000 to 3,500 A.

Claim 10

The process as defined in claim 10 in which said solution contains at least about 2 percent by weight of photosensitizer and at least about 0.25 percent by weight of organic isocyanate based on the weight of said solution.

Claim 11

The process as defined in claim 10 in which said adhesive is applied to said surface after the ultraviolet raDiation.

Claim 12

The process as defined in claim 11 in which said adhesive is applied after ultraviolet radiation.

Claim 13

The process as defined in claim 12 in which said adhesive is selected from the group consisting of polyether glycol urethanes, polyester glycol urethanes, resinous polyepoxides, resinous polyesters from condensation and polymerization of at least one dibasic organic acid and at least one glycol and resinous polyesters from polymerization of lactones.

Claim 14

The process as defined in claim 10 in which said solution contains resinous adhesive.

Claim 15

The process as defined in claim 11 in which said solution contains a resinous adhesive.

Claim 16

The process as defined in claim 14 in which said adhesive is selected from the group consisting of polyether glycol urethanes, polyester glycol urethanes, resinous polyepoxides, resinous polyesters from condensation and polymerization of at least one dibasic organic acid and at least one glycol and resinous polyesters from polymerization of lactones.

Claim 17

A body of polymer resin having at least some hydrogen on a carbon chain in a repeating unit in the polymer chain and a urethane stratum at a surface of said body to be bonded, said stratum being integral with the polymer resin of said body.

Claim 18

A body of polymer resin as defined in claim 18 having a layer of adhesive in wetting adhesive engagement with said urethane stratum.

Claim 19

a body of polymer resin as defined in claim 19 in which said adhesive is selected from the group consisting of polyether glycol urethanes, polyester glycol urethanes, resinous polyepoxides, resinous polyesters from condensation and polymerization of at least one dibasic organic acid and at least one glycol and resinous polyesters from polymerization of lactones.