Claims
- 1. A method for bonding plastic films prepared from organic polymers which comprises coating each surface of the plastic film with a composition consisting essentially of (a) a vinyl containing organopolysiloxane having the formula
- R.sub.2 (CH.sub.2 .dbd.CH)SiO(R'.sub.2 SiO).sub.n SiR.sub.2 (CH.dbd.CH.sub.2)
- wherein R is selected from the group consisting of methyl and phenyl radicals, R' is selected from the group consisting of methyl, vinyl and phenyl radicals, n is a number sufficient to provide an organopolysiloxane having a viscosity of at least 100,000 cP at 25.degree. C. in which 0.1 to 1 mol percent of the diorganopolysiloxane units are vinylmethylsiloxanes and at least 90 percent of the remaining organic radicals consist of methyl radicals, (b) an organopolysiloxane containing at least three Si-bonded hydrogen atoms in which the Si-bonded hydrogen atoms are present in an amount of from 0.01 to 1.7 weight percent and (c) a catalyst which promotes the addition of Si-bonded hydrogen atoms to the vinyl groups, intimately contacting the coated surfaces and thereafter heating to a temperature of from 100.degree. to 200.degree. C.
- 2. The method of claim 1 wherein the organic polymer is a polyimide film.
- 3. The method of claim 1 wherein the organic polymer is a polyethylene terephthalate film.
- 4. The method of claim 1 wherein the catalyst is a Group VIII element.
- 5. The method of claim 1 wherein the composition contains a reinforcing filler having a surface area of at least 50 m.sup.2 /g.
Priority Claims (1)
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2307776 |
Feb 1973 |
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Parent Case Info
This is a division of application Ser. No. 546,246, filed Feb. 3, 1975, now U.S. Pat. No. 4,051,454, which is a continuation of Ser. No. 443,533, filed Feb. 19, 1974, now abandoned.
US Referenced Citations (7)
Non-Patent Literature Citations (1)
Entry |
Encyclopedia of Polymer Science and Technology, vol. 1, pp. 445 and 446, (1964). |
Divisions (1)
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546246 |
Feb 1975 |
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Continuations (1)
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443533 |
Feb 1974 |
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