Flash evaporation of monomer fluids
First Claim
1. A method for continuously supplying a uniform vapor of a polymerizable material, said method comprising:
- supplying a continuous liquid flow of said material at a temperature below both the decomposition temperature and the polymerization temperature of said material;
continuously atomizing the liquid flow into a continuous flow of liquid droplets; and
continuously vaporizing said liquid droplets by causing said droplets to contact a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing.
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Accused Products
Abstract
A method for continuously supplying a uniform vapor of a polymerizable and/or cross-linkable material. A continuous liquid flow of said material is supplied at a temperature below both the decomposition temperature and the polymerization temperature of said material and atomized into a continuous flow of liquid droplets having a particle size from about 1 to about 50 microns. The droplets are continuously vaporized upon contact with a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing. The vapor may be deposited onto a substrate and subsequently polymerized or cross-linked.
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Citations
23 Claims
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1. A method for continuously supplying a uniform vapor of a polymerizable material, said method comprising:
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supplying a continuous liquid flow of said material at a temperature below both the decomposition temperature and the polymerization temperature of said material; continuously atomizing the liquid flow into a continuous flow of liquid droplets; and continuously vaporizing said liquid droplets by causing said droplets to contact a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing.
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2. A method for depositing onto a substrate a layer of polymerizable material, said material being characterized by the fact that it is chemically unstable at or below its boiling point, said method comprising:
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vaporizing said material by continuously placing droplets of said material into contact with a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing; maintaining at least a portion of said substrate at a temperature which is below the boiling point of said material and in a region which is at a lower pressure than said vaporized material, to provide a positive flow of vaporized material toward said substrate; and directing the flow of vaporized material onto said substrate. - View Dependent Claims (3, 4, 5)
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6. A method for depositing a layer of a polymerizable material on a substrate comprising:
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supplying a continuous liquid flow of said material at a temperature below both the decomposition and the polymerization temperature of said material; continuously atomizing said liquid flow into a continuous flow of liquid droplets; continuously vaporizing said liquid droplets by causing said droplets to contact a heated surface which is maintained at a temperature at or above the boiling point for said material but below the temperature at which said droplets would undergo pyrolysis before vaporizing; maintaining at least a portion of said substrate at a temperature which is below the boiling point of said material and in a region which is at a lower pressure than said vaporized material, to provide a positive flow of vaporized material toward said substrate; and directing the flow of vaporized material onto said substrate. - View Dependent Claims (7, 8, 9)
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10. A method for continuously supplying a uniform vapor of a polymerizable material, said method comprising:
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providing a liquid supply of said material, at a temperature below both the decomposition temperature and the polymerization temperature of said material, to a drop just contacting a flat face of a disk; rotating the disk so that a fluid film is pulled on the face free from the drop and a continuous flow of liquid droplets is thrown from the periphery of the disk; and continuously vaporizing said liquid droplets by causing said droplets to contact a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for continuously supplying a uniform vapor of a polymerizable material, said method comprising:
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providing a liquid supply of said material, at a temperature below both the decomposition temperature and the polymerization temperature of said material, to an end surface at a tip of an ultrasonic vibration device; ultrasonically vibrating said device so that the material supplied to the end surface coats the end surface and is dispersed in droplets from the periphery of the end surface; and continuously vaporizing said liquid droplets by causing said droplets to contact a heated surface which is maintained at a temperature at or above the boiling point for said material, but below the temperature at which said droplets would undergo pyrolysis before vaporizing. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification