Polyolefin-coated photographic carrier material
阅读：674发布：2023-05-05
专利汇可以提供Polyolefin-coated photographic carrier material专利检索，专利查询，专利分析的服务。并且A polyolefin-coated photographic paper coated with a crystallized coating of calcium, magnesium, zinc or lead fluoride or mixtures thereof, silicic acid and a matting agent is disclosed. The crystallized coating is receptive to hydrophilic substances and diminishes the hydrophobic nature of the polyolefin coating.，下面是Polyolefin-coated photographic carrier material专利的具体信息内容。
1. A POLYOLEFIN COATED PHOTOGRAPHIC CARRIER PAPER RECEPTIVE TO HYDROPHILIC SUBSTANCES, WHEREIN SAID POLYOLEFIN IS COATED WITH A CRYSTALLIZED COATING COMPRISING CALCUIM, MAGNESIUM, ZINC OR LEAD FLUORIDE OR MIXTURES THEREOF, SILICIC ACID AND A MATTING AGENT.
2. A photographic carrier according to claim 1 which includes in said crystallized coating an anti-static agent.
3. A photographic carrier according to claim 2 wherein said anti-static agent is an alkali or ammonium salt of a polycarboxylic or polysulphonic acid.
4. A photographic carrier according to claim 1 wherein said polyolefin is corona discharge activated.
5. A process for treating a hydrophobic, polyolefin coated photographic carrier paper to render the polyolefin coating receptive to hydrophilic substances which comprises coating said carrier with an aqueous suspension comprising: 0.05 to 6 weight % magnesium or calcium hexafluoro silicate, or mixtures thereof; 1 to 10 weight % matting agent; 3 to 12 weight % colloidal silica; the balance being water; and drying said coating to produce a crystallized coating bonded to the polyolefin coating.
6. A process according to claim 5 wherein said suspension includes, as a matting agent, calcium magnesium carbonate having a 2-20 Mu particle size.
7. A process according to claim 5 wherein said colloidal silica has a 2-30 m Mu particle size.
8. A process according to claim 5 which includes an anti-static agent.
9. A process according to claim 8 wherein said anti-static agent comprises the sodium salt of polystyrene sulphonic acid.
10. A process according to claim 8 wherein said anti-static agent is a potassium salt of polyacrylic acid.
11. A process according to claim 5 wherein said suspension includes, as a matting agent, calcium silicate having a 50-500 m Mu particle size.
12. A process according to claim 5 wherein said suspension includes butanol or methanol.
13. A process according to claim 5 wherein said suspension includes, as a matting agent, a mixed precipitation product of calcium silicate and calcium magnesium carbonate with a parTicle size of about 0.1 and 20 Mu .
14. A process according to claim 13 wherein a portion of the calcium is replaced by aluminum or magnesium.
15. A process according to claim 14 wherein a portion of the calcium is present in the form of an oxide, hydroxide or other alkaline reacting compound.
16. A process according to claim 5 wherein the suspension contains 5-40% of a finely dispersed polyacrylic propyl ester having a particle size of 0.05 - 0.50 Mu .
17. A process according to claim 16 wherein said ester contains 5% polymerized vinyl ether.
18. A process according to claim 5 wherein the suspension includes a polyacryl acid propyl ester, a polyacryl butyl ester or a styrene butadiene interpolymer having a butadiene content of over 50%.
19. A process according to claim 5 wherein said matting agent is calcium carbonate or the precipitated double reaction product of a water soluble salt of calcium and a magnesium and/or aluminum salt with sodium or potassium silicate or carbonate.
20. A process according to claim 5 wherein said suspension includes 0.01 to 0.2% by weight wetting agent.
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