PREPREG, FIBER-REINFORCED COMPOSITE MATERIAL AND MENDING AND REINFORCING METHOD OF CONCRETE STRUCTURE

• Main Authors: OOSETO HIROKI, SAWAOKA RYUJI
• Format: Patent
• Language: English
• Published: 24.02.1998
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CHEMISTRY; COMPOSITIONS BASED THEREON; FIXED CONSTRUCTIONS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FORMS; GENERAL PROCESSES OF COMPOUNDING; HANDLING BUILDING MATERIALS ON THE SITE; LAUNDERING; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To obtain a prepreg which liberates no gas, when a moisture-curable resin composition is hardened, and is useful as a fiber-reinforced composite material or the like excellent in hardenability and mechanical properties because of a largely reduced amount of bubbles in the inside and surface of the hardened product. SOLUTION: This prepreg is prepared by impregnating reinforcing fibers such as carbon fibers with a moisture-hardening resin composition which contains a reaction product between an epoxy resin having 1 or more hydrolyzable silyl group of the formula (X is a hydrolyzable group; (a) is 0-2; R' is an alkyl) and a silane compound having a functional group reactive with epoxy group in one molecule, gives a hardened product having a flexural modulus of >=1.0Gpa at room temperature and a glass transition point of >=30 deg.C. When this resin composition is hardened, substantially no gas is liberated. In a preferred embodiment, this prepreg is applied to a concrete structure and hardened whereby the concrete structure is mended or reinforced.