MDI-сополимер полипропиленгликоля

Description

MDI polypropylene glycol copolymer is a prepolymer (prepolymer) with terminal isocyanate groups, the product of the reaction of 4,4'-diphenylmethane diisocyanate (MDI) with a polyether polyol based on propylene oxide. In the synonym card, the substance is written as a polymer of α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)] with 1,1'-methylenebis[4-isocyanatobenzene]. The mass fraction of free NCO groups in the finished product is determined by the molecular weight of the polypropylene glycol used: the higher the MW of the polyol, the lower the content of reactive isocyanate groups. Trade names from the card: Hiprene AX 598, Adeka P 1000 copolymer with 1,1'-methylenebis[4-isocyanatobenzene], 1,1'-methylenebis[4-isocyanatobenzene]-PPG 1025 copolymer.

Basic Attributes

• CAS No.: 9048-57-1 (related registrations: 9087-82-5, 66737-91-5, 67599-24-0, 74172-15-9, 81856-74-8, 90999-05-6, 92068-16-1, 115383-48-7, 125005-30-3, 140136-91-0, 168269-81-6, 201139-72-2, 201528-78-1, 400866-01-5, 870695-57-1, 1227700-25-5, 1431474-08-6, 1940225-10-4, 2209045-96-3)
• Gross formula: (C15H10N2O2, (C3H6O)nH2O)x
• Molecular Weight: 384.4
• Exact weight: 384.16852187
• EU number: 500-028-8

The product is polymeric, therefore the given mass values ​​refer to a conventional unit of account, and not to a real molecule; actual batch characteristics are determined by NCO content and viscosity.

Scope of application

• isocyanate component of two-component polyurethane adhesives, including for gluing membranes and rolled materials
• one-component moisture-curing adhesives and sealants
• injection molded polyurethane elastomers
• protective coatings and liquid compositions
• binders for composite and wood materials
• raw materials for the production of polyurethanes and polyureas

Curing Chemistry

Terminal NCO groups react with hydroxyl-containing components (polyols, amino alcohols), forming urethane bonds, and with water, releasing carbon dioxide and forming urea bonds. The second reaction determines two practical consequences: the operation of one-component systems that are cured by air moisture, and the mandatory protection of the product from moisture during storage, otherwise the container will swell and the viscosity will increase.

Safety Information

• Hazard Statements: H302 (54.95%) - Harmful if swallowed; H315 - Causes skin irritation
• GHS classification: signal word “Danger”; aggregated information provided by 415 companies for 9 notifications to the ECHA C and L register
• Precautions: P201, P202, P260, P261, P264, P270, P271, P272, P280, P281, P284, P285, P301+P312, P302+P352, P304+P312, P304+P340, P304+P341, P305+P351+P338, P308+P313, P310, P312, P314, P320, P321, P330, P332+P313, P333+P313, P337+P313, P342+P311, P362, P363, P403+P233, P405, P501

Storage and handling

The container is sealed; when opened, it is protected with dry nitrogen; Air moisture consumes isocyanate groups. Work with exhaust ventilation, do not inhale aerosols and vapors (P260, P261, P271), use gloves, protective clothing and goggles (P280). The room is ventilated, the container is tightly closed (P403+P233), stored under lock and key (P405). Dispose of waste and cleaning solvents in an organized manner (P501); Before disposal, isocyanate residues are decontaminated with an alcohol- and amine-based reagent according to the manufacturer's instructions.