US5093386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid curable plastic composition
Assignee: DSM BV
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Filing: 1991-03-05
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Granted: 1992-03-03
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Expires: 2011-03-05
Abstract
Abstract A liquid photocurable plastic composition is disclosed which comprises: (a) from 14% to 70% by weight of a polyurethane (meth)acrylate having a polyoxyalkylene structure in the backbone of the polyurethane, said polyurethane (meth)acrylate containing 0.8 to 8 weight percent of ethylenic unsaturation, from 50% to 98% by weight of the polyoxyalkylene structure, and having a number average molecular weight of 1,000 to 7,000; (b) from 5% to 40% by weight of a polyurethane (meth)acrylate having at least 15% by weight of a tricyclodecane structure in the backbone of the polyurethane and a number average molecular weight of from 500 to 1,000; (c) a reactive diluent; and (d) a polymerization initiator. This combination provides a liquid curable plastic composition suitable as the secondary coating or bundling material for use with optical fibers to provide compositions which photocure rapidly to provide cured coatings which are relatively hard and elongatable and which can be applied at low viscosity without encountering excessive sensitivity to water.
Inventors
- 👤 Timothy E. Bishop
- 👤 Tohru Ohtaka
- 👤 Osamu Ishikawa
- 👤 Masanobu Takahashi
- 👤 Katsutoshi Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672; C08F; C08F290/00; C08F290/08; C08F290/14; C08F290/147; C08G18/30; C08G18/32; C08G18/3203; C08G18/3212; C08G18/40; C08G18/48; C08G18/4825; C08G18/4854; C08G18/4858; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; C08L; C08L75/00; C08L75/04; C08L75/14; C08L75/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
A liquid photocurable plastic composition comprising: (a) from 14% to 70% by weight of a polyurethane (meth)acrylate having a polyoxyalkylene structure in the backbone of the polyurethane, said polyurethane (meth)acrylate containing 0.8 to 8 weight percent of ethylenic unsaturation, from 50% to 98% by weight of the polyoxyalkylene structure, and having a number average molecular weight of 1,000 to 7,000 ; (b) from 5% to 40% by weight of a polyurethane (meth)acrylate having at least 15% by weight of a tricyclodecane structure in the backbone of the polyurethane and a number average molecular weight of from 500 to 1,000; (c) a reactive diluent; and (d) a polymerization initiator.
Claim 2
Dependent Claim
108 words
A liquid photocurable plastic composition comprising: (a) from 14% to 70% by weight of a polyurethane (meth)acrylate having a polyoxyalkylene structure in the backbone of the polyurethane, said polyurethane (meth)acrylate containing 0.8 to 8 weight percent of ethylenic unsaturation, from 50% to 98% by weight of the polyoxyalkylene structure, and having a number average molecular weight of 1,000 to 7,000 ; (b) from 5% to 40% by weight of a polyurethane (meth)acrylate having at least 15% by weight of a tricyclodecane structure in the backbone of the polyurethane and a number average molecular weight of from 500 to 1,000; (c) a reactive diluent; and (d) a polymerization initiator.
Claim 3
Dependent Claim
19 words
A photocurable composition as recited in claim 1 in which said polyoxyalkylene structure is provided by a polyoxytetramethylene structure.
Claim 4
Dependent Claim
24 words
A photocurable composition as recited in claim 2 in which said polyoxytetramethylene structure is provided by a copolymerized diol of tetrahydrofuran and 3-methyl tetrahydrofuran.
Claim 5
Dependent Claim
42 words
A photocurable composition as recited in claim 1 in which said polyurethane (meth)acrylate having a polyoxyalkylene structure is made by the reaction of components comprising an organic diisocyanate, a diol having the polyoxyalkylene structure and an acrylate having a single hydroxy group.
Claim 6
Dependent Claim
22 words
A photocurable composition as recited in claim 4 in which said acrylate having a single hydroxy group is provided by 2-hydroxyethyl acrylate.
Claim 7
Dependent Claim
54 words
A photocurable composition as recited in claim 1 in which said polyurethane (meth)acrylate is present in an amount of from 16% to 70% and contains 1 to 5 weight percent of ethylenic unsaturation, from 60% to 93% by weight of the polyoxyalkylene structure, and has a number average molecular weight of 1,500 to 5,000.
Claim 8
Dependent Claim
22 words
A photocurable composition as recited in claim 6 in which from 70% to 90% by weight of the polyoxyalkylene structure is present.
Claim 9
Dependent Claim
49 words
A photocurable composition as recited in claim 1 in which said polyurethane (meth)acrylate having a tricyclodecane structure is present in an amount of from 10% to 35% and has at least 20% by weight of said tricyclodecane structure and a number average molecular weight of from 700 to 900.
Claim 10
Dependent Claim
22 words
A photocurable composition as recited in claim 1 in which said polyurethane (meth)acrylate having a tricyclodecane structure is based on tricyclodecane dimethanol.
Claim 11
Dependent Claim
17 words
A photocurable composition as recited in claim 1 in which said component (c) comprises an N-vinyl lactam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |