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  Resin composition and thermo/photosensitive compositionRelated Patent Categories: Radiation Imagery Chemistry: Process, Composition, Or Product Thereof, Imaging Affecting Physical Property Of Radiation Sensitive Material, Or Producing Nonplanar Or Printing Surface - Process, Composition, Or Product, Radiation Sensitive Composition Or Product Or Process Of Making, Identified Backing Or Protective Layer Containing, Identified Overlayer On Radiation-sensitive LayerThe Patent Description & Claims data below is from USPTO Patent Application 20080044763. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATION [0001] This is a continuation of application Ser. No. 10/638,906 filed Aug. 12, 2003, which claims priority under 35 USC 119 from Japanese Patent Application Nos. 2002-237509 and 2002-275439, the disclosures of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a resin composition and a thermo/photosensitive composition that can be used as compositions that can be cured by light or heat and used in image recording materials such as three dimensional optical shaping and holography, planographic printing plate materials, color proofs, photo-resists, and color filters, inks, paints, and adhesives. In particular, the invention relates to a resin composition and a thermo/photosensitive composition that can be suitably used as recording materials of negative type planographic printing plate precursors capable of so-called direct plate-making which can be directly made a plate with various lasers based on digital signals of a computer and the like. [0004] 2. Description of the Related Art [0005] In recent years, development of lasers is remarkable; in particular, solid lasers, semiconductor lasers, and gas lasers that emit UV light, visible light, and infrared light in the wavelength range of from 300 to 1200 nm, can be easily obtained as ones that are high in power and small in size. The lasers are very useful as a recording light source when the direct palate making based on digital data of such as a computer is performed in planographic printing. There are various studies on the image recording materials that respond to various laser lights; positive image recording materials that respond to infrared lasers of a photosensitive wavelength of 760 nm or more (such as those described in U.S. Pat. No. 4,708,925), and acid-catalyst crosslinking negative image recording materials (such as those described in Japanese Patent Application Laid-Open (JP-A) No. 8-276558) are known. Furthermore, radical polymerizing negative image recording materials that respond to UV light or visible light in the range of from 300 to 700 nm are also known (such as those described in U.S. Pat. No. 2,850,445 and Japanese Patent Publication (JP-B) No. 44-20189). [0006] Normally, such a negative image recording material contains a compound that generates radicals when exposed to light or heat and a polymerizable compound, and a recording method is utilized in which a polymerization reaction is caused by the radicals generated when exposed to light or heat as an initiator, thereby an image recording layer in an exposed portion is cured, and thereby an image area is formed. Such negative image recording materials are low in the image forming property in comparison with positive image recording materials in which a recording layer is made soluble by energy of laser irradiation. Accordingly, with an intention of accelerating a curing due to polymerization and thereby forming a image area with strength, heat treatment is generally applied before development. [0007] As printing plates that have such an image recording layer formed by the polymerization caused by light or heat, techniques (such as those described in JP-A Nos. 8-108621 and 9-34110) that use a photo-polymerizable or heat polymerizable composition as a recording layer are known. These image-recording layers are excellent in the high sensitivity image forming property. However, when a hydrophilicity-imparted substrate that is used as a support, there is a problem in that since adhesion at an interface between the image recording layer and the support is low, the press life is short. [0008] Furthermore, in order to improve sensitivity, use of infrared lasers of higher output is under study; however, there is a problem in that an optical system is contaminated by generation of ablation of a recording layer during laser scanning. Other than this, chemical amplification-type sensitive materials (such as those described in JP-A No. 11-65105) and sensitive materials that utilize polymerization of ethylenic unsaturated compounds (such as those described in JP-A No. 2000-89455) are under study. However, since these sensitive materials contain components excellent in the reactivity to light and heat, there is concern in that handling under white light or variation of an environmental temperature tends to cause an undesirable reaction, that is, their shelf-stability is poor. SUMMARY OF THE INVENTION [0009] Taking such disadvantages of the existing techniques into consideration, the object of the invention is to provide a resin composition useful as a photo- or thermo-curing composition that can form a solid coating that can be efficiently cured by light or heat and is excellent in the shelf-stability, and can be preferably used for image recording materials used in such as three dimensional optical shaping and holography, planographic printing plate materials, color proofs, photo-resists and color filters, inks, paints and adhesives. And another object of the invention is to provide a thermo/photosensitive composition that is excellent in the film forming property, film strength and shelf-stability that are useful as a recording layer of a negative type planographic printing plate precursor. [0010] The present inventors, after intensive study, have found that the object can be achieved by introducing a linkage group and a terminal group having a specific structure on a side chain of a polymer compound that plays a role of a binder in a resin composition, using a polymer compound that has a non-acidic hydrogen bonding group on a side chain and is soluble or swelling in water or an alkali aqueous solution as a polymer compound that plays a function as a binder in a thermo/photosensitive composition. Thereby, the invention was accomplished. [0011] That is, the resin composition according to the invention includes [0012] (A) a polymer compound that has, through a linkage group containing a hydrogen-bonding group and a ring structure, a terminal ethylenic unsaturated bond on a side chain, and is soluble or swelling in water or an aqueous alkali solution (hereinafter, occasionally referred to as "specific alkali-soluble polymer compound A"), and (B) a compound that generates radicals when exposed to light or heat (hereinafter, occasionally referred to as "radical initiator"). [0013] As the hydrogen-bonding group, those having a structure represented by the following formula (a) are preferable. [0014] In the formula (a), R denotes a hydrogen atom or a monovalent organic group. Furthermore, R may form a heterocyclic structure together with a nitrogen atom in the formula; in that case, the heterocyclic structure becomes the ring structure. That is, as a linkage group in the invention, one having a structure represented by the following formula (b) or (c) is preferable. [0015] In the equation (b), the definition of R is the same as that in the formula (a), and X represents a single bond or an organic linkage group. [0016] The ring structure involved in the invention is preferably a saturated cyclic hydrocarbon group or heterocyclic group having 3 to 20 carbon atoms, or an aromatic hydrocarbon group or a condensed polycyclic hydrocarbon group having 6 to 20 carbon atoms. [0017] Furthermore, in the invention, a glass transition temperature of the specific alkali-soluble polymer compound A is preferably 60.degree. C. or more. [0018] Although the mechanism of the invention is not clear, such specific alkali-soluble polymer compound A has an ethylenic unsaturated bond on a side chain. The structure, having a functional group high in the radical reactivity, is excellent in the reactivity, and furthermore, a dense and strong crosslinking structure between polymer compounds can be rapidly formed by energy transfer during exposure. Accordingly, it is considered that a planographic printing plate precursor that contains such specific alkali-soluble polymer compound A as a component of a recording material can realize high sensitivity, and excellent press life and ink-affinity. [0019] Furthermore, the specific alkali-soluble polymer compound A according to the invention has, as a linkage group between the terminal ethylenic unsaturated group and a main chain polymer, a hydrogen-bonding group and a ring structure. In a conventional alkali-soluble polymer compound having an ethylenic unsaturated bond, when an amount of the introduced ethylenic unsaturated groups is increased to improve the sensitivity, there is a problem in that the glass transition temperature thereof (Tg) decreases and the shelf-stability to light and heat deteriorates. However, in the specific alkali-soluble polymer compound A used in the invention, it is considered that the hydrogen-bonding properties of such linkage group and bulkiness of the ring structure restrict a rotation around a polymer compound main chain and enables to maintain a high glass transition temperature. [0020] Furthermore, the thermo/photosensitive composition according to the invention includes (A) a polymer compound that has a non-acidic hydrogen-bonding group on a side chain and is soluble or swelling in water or an alkali aqueous solution, and (B) a compound that generates radicals when exposed to light or heat. The (A) polymer compound that has a non-acidic hydrogen-bonding group on a side chain and is soluble or swelling in water or an alkali aqueous solution, in a mode, further includes an ethylenic unsaturated bond on a side chain. Continue reading... Full patent description for Resin composition and thermo/photosensitive composition Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Resin composition and thermo/photosensitive composition patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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