Claims
- 1. An optical glass fiber of improved strength having: (1) a first coating layer of a synthetic rubber having a modulus of elasticity of from 1 to 10 MPa and (2) a second coating layer of a synthetic resin having a modulus of elasticity exceeding 100 MPa, at least the first coating layer of synthetic rubber being formed from an elastomer-forming material comprising a polyurethane acrylate curable by actinic radiation, and a total amount of 0.1 to 5% by weight of one or more compounds effective to improve adhesion between said first layer and said glass fiber selected from phophorous compounds of the following structural formula: ##STR7## wherein n has a value of 1 or 2 and wherein R is an organic group.
- 2. An optical glass fibre as claimed in claim 1 wherein R is an organic group which coreacts during curing of the curable elastomer-forming material and is built into the polymeric network thus formed.
- 3. An optical glass fibre as claimed in claim 2, wherein the curable elastomer-forming material comprises a polyurethane acrylate and R is an organic group which comprises at least one acrylate ester group.
- 4. An optical glass fibre as claimed in claim 3, wherein R is a 2-acryloxy ethylate group.
- 5. An optical glass fibre as claimed in claim 1, wherein the curable elastomer-forming material comprises up to 2% by weight of a poly(dimethyl siloxane-co-ethyleneoxide) acrylate.
- 6. An optical glass fiber of improved strength having: (1) a first coating layer of a synthetic rubber having a modulus of elasticity of from 1 to 10 MPa formed from a curable elastomer-forming material which comprises an oligomeric urethane acrylate and a monomeric acrylate, the oligomeric urethane acrylate being polyurethane acrylate having a number-averaged molecular weight in excess of 3000, of the following structural formula: ##STR8## wherein R.sub.1 is selected from the group formed by polyether chains and polyester chains having a number-averaged molecular weight in excess of 2500wherein R.sub.2 is a bivalent radical of a disocyanate and wherein R.sub.3 is a bivalent radical of a dihydric alcohol, (2) a second coating of a synthetic resin having a modulus of elasticity exceeding 100 MPa; at least the first coating layer being cured by exposure to actinic radiation; said elastomer forming material containing from about 0.1 to 5% by weight of one or more phosphorous compounds effective to improve adhesion between said first layer and said glass fiber selected from compounds having the following general structural formula: ##STR9## wherein n is an integer of 1 or 2 and R is an organo group.
- 7. An optical glass fiber as claimed in claim 6 wherein in said polyurethane acrylate formula R.sub.1 is selected from the group of ##STR10## wherein the average value of n exceeds 90 and wherein the average value of m exceeds 30.
- 8. An optical glass fiber as claimed in claim 7 wherein R.sub.2 is selected from the group of ##STR11##
- 9. An optical glass fiber as claimed in claim 7 wherein R.sub.2 is selected from the group of ##STR12##
- 10. An optical glass fiber as claimed in claim 6 wherein R.sub.3 is selected from the group of --(CH.sub.2 --CH.sub.2 --O).sub.p -- and ##STR13## wherein p is at least 1.
- 11. An optical glass fiber as claimed in claim 6 wherein in the phosphorus compound structural formula R is selected from the group of acrylate ester, alkyl, vinyl and vinyl-aromatic groups, at least one R group being an acrylate ester group.
- 12. An optical glass fiber as claimed in claim 6 wherein said phosphorus compound is selected from the group of mono-2-acryloxy ethyl phosphate, di-2-acryloxyethyl phosphate and mixtures thereof.
- 13. An optical glass fiber as claimed in claim 12 wherein said curable elastomer-forming material comprises a polyetherurethane acrylate.
- 14. An optical glass fiber as claimed in claim 13 wherein said curable elastomer-forming material further comprises up to 2% by weight of a poly (dimethyl siloxane co-ethylene oxide) acrylate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8502106 |
Jul 1985 |
NLX |
|
Parent Case Info
This is a continuation of application Ser. No. 183,451, filed Apr. 14, 1988 and now abandoned, which in turn is a continuation of Ser. No. 880,262, filed Jun. 30, 1986, and now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4125644 |
Ketley et al. |
Nov 1978 |
|
4264658 |
Tobias et al. |
Apr 1981 |
|
4482204 |
Blyler, Jr. et al. |
Nov 1984 |
|
4741596 |
Broer et al. |
May 1988 |
|
Continuations (2)
|
Number |
Date |
Country |
Parent |
183451 |
Apr 1988 |
|
Parent |
880262 |
Jun 1986 |
|