BLOCK POLYISOCYANATE COMPOSITION

• Main Authors: FUKUCHI TAKASHI, SHINOMIYA KIE
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2016
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a water-based block polyisocyanate composition that has an excellent water dispersibility, and has an excellent smoothness and heat resistance when used as a coating composition.SOLUTION: There is provided a block polyisocyanate composition obtained by the reaction of a polyisocyanate mixture containing a first polyisocyanate and a second polyisocyanate, poly(oxyalkylene)glycol monoalkyl ether, and a block agent. The first polyisocyanate is obtained from at least one selected from the group consisting of aliphatic diisocyanate and alicyclic diisocyanate, the average number of functional group in the isocyanate group possessed by the first polyisocyanate is 4.0 or more and 10 or less, the second polyisocyanate is obtained from at least one selected from the group consisting of aliphatic diisocyanate and alicyclic diisocyanate, the average number of functional group in the isocyanate group possessed by the second polyisocyanate is 2.5 or more and 3.9 or less, and the viscosity at 40°C is 20,000 mPa s or more and 200,000 mPa s or less.SELECTED DRAWING: None 【課題】水分散性に優れ、コーティング組成物として用いたときに平滑性及び耐熱性に優れる、水系ブロックポリイソシアネート組成物を提供する。【解決手段】第一のポリイソシアネート及び第二のポリイソシアネートを含むポリイソシアネート混合物と、ポリ（オキシアルキレン）グリコールモノアルキルエーテルと、ブロック剤と、の反応により得られ、前記第一のポリイソシアネートは、脂肪族ジイソシアネート及び脂環族ジイソシアネートからなる群より選ばれる少なくとも１種から得られ、該第一のポリイソシアネートが有するイソシアネート基の平均官能基数が、４．０以上１０以下であり、前記第二のポリイソシアネートは、脂肪族ジイソシアネート及び脂環族ジイソシアネートからなる群より選ばれる少なくとも１種から得られ、該第二のポリイソシアネートが有するイソシアネート基の平均官能基数が、２．５以上３．９以下であり、４０℃における粘度が、２０，０００ｍＰａ・ｓ以上２００，０００ｍＰａ・ｓ以下である、ブロックポリイソシアネート組成物。【選択図】なし