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US3858510A Expired / Lapsed US ⏱️ 0.0 years remaining

Relief structures prepared from photosensitive compositions

Assignee: Asahi Kasei Corp
•
Filing: 1973-09-07
•
Granted: 1975-01-07
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Expires: 1993-09-07
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Abstract

Abstract WHEREIN R1 represents a hydrogen atom or methyl group; M IS AN INTEGER FROM 2 TO 4; AND X REPRESENTS A RADICAL OF A POLYOL HAVING A MOLECULAR WEIGHT OF AT MOST 1,000 AND M TERMINAL HYDROXY GROUPS FROM WHICH THE TERMINAL HYDROXY GROUPS ARE EXCLUDED, AND, (C) about 0.0001 TO 10 PARTS BY WEIGHT OF A PHOTOPOLYMERIZATION INITIATOR. The compositions are exposed to a light source through an imagebearing transparency to effect polymerization, and unpolymerized unexposed monomer is washed away, leaving a relief structure suitable for printing plates. The plates are characterized by good flexibility, hardness and water resistance. WHEREIN R2 represents a hydrogen atom or methyl group; and R3, R4R5 and R6 represent an alkyl group or cycloalkyl group having at most 10 carbon atoms, AND ABOUT 10 TO 100 PARTS BY WEIGHT OF A COMPOUND (II) OF THE FORMULA A photosensitive composition comprising (A) about 100 parts by weight of an unsaturated polyester produced from an alcoholic component comprising at least one polyol and an acidic component comprising at least one unsaturated dicarboxylic acid, its anhydride or its methyl or ethyl ester and having an average molecular weight of about 400 to 30,000 and ethylenic double bond equivalent of about 160 to 3,200, (B) about 1 to 50 parts by weight of an ethylenically unsaturated compound (i) of the formula

Inventors

  • 👤 Tsunetoshi Kai
  • 👤 Mitsuhiro Inoue
  • 👤 Matuo Yoshida
  • 👤 Jun-Ichi Ueda

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 08:16
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; C; C08; C08F; C08F283/00; C08F283/01

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 102 words
A RELIEF STRUCTURE SUITABLE FOR USE AS A PRINTING PLATE COMPRISING A BASE AND RAISED PORTIONS THEREON, SAID RAISED PORTIONS COMPRISING A POLYMER OF (A) ABOUT 100 PARTS BY WEIGHT OF AN UNSATURATED POLYESTER PRODUCED FROM AN ALCOHOLIC COMPONENT COMPRISING AT LEAST ONE POLYOL AND AN ACIDIC COMPONENT COMPRISING AT LEAST ONE UNSATURATED DICARBOXYLIC ACID, ITS ANHYDRIDE OR ITS METHYL OR ETHYL ESTER AND HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 400 TO 30,000 AND AN ETHYLENIC DOUBLE BOND EQUIVALENT OF ABOUT 160 TO 3,200, (B) ABOUT 10 TO 50 PARTS BY WEIGHT OF AN ETHYLENICALLY UNSATURATED COMPOUND (I) OF THE FORMULA
Claim 2
Dependent Claim 102 words
A RELIEF STRUCTURE SUITABLE FOR USE AS A PRINTING PLATE COMPRISING A BASE AND RAISED PORTIONS THEREON, SAID RAISED PORTIONS COMPRISING A POLYMER OF (A) ABOUT 100 PARTS BY WEIGHT OF AN UNSATURATED POLYESTER PRODUCED FROM AN ALCOHOLIC COMPONENT COMPRISING AT LEAST ONE POLYOL AND AN ACIDIC COMPONENT COMPRISING AT LEAST ONE UNSATURATED DICARBOXYLIC ACID, ITS ANHYDRIDE OR ITS METHYL OR ETHYL ESTER AND HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 400 TO 30,000 AND AN ETHYLENIC DOUBLE BOND EQUIVALENT OF ABOUT 160 TO 3,200, (B) ABOUT 10 TO 50 PARTS BY WEIGHT OF AN ETHYLENICALLY UNSATURATED COMPOUND (I) OF THE FORMULA
Claim 3
Dependent Claim 26 words
A relief structure according to claim 1, wherein the polymer also includes about 1 to 50 parts by weight of a compound (iii) of the formula
Claim 4
Dependent Claim 56 words
A relief structure according to claim 2 having a tensile strength of at least about 75 kg/cm2, a tensile elongation of about 8 to 65 percent, a Young''s Modulus of about 1,000 to 7,000 kg/cm2, a Shore hardness D of at least about 30 and a water absorption of less than about 15 percent by weight.
Claim 5
Dependent Claim 56 words
A relief structure according to claim 2 having a tensile strength of at least about 150 kg/cm2, a tensile elongation of about 15 to 35 percent, a Young''s Modulus of about 1,500 to 4,000 kg/cm2, a Shore hardness D of at least about 50 and a water absorption of less than about 10 percent by weight.
Claim 6
Dependent Claim 14 words
A relief structure according to claim 1, in the form of a printing plate.

References Cited (Backward Citations)

US3556791A Cited
US3677920A Cited
US3616370A Cited
US3695877A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-01-06 1978-07-08 1979-01-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-01-06 1982-07-08 1983-01-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-01-06 1986-07-08 1987-01-07 $7700.00 Window Closed / Lapsed

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