Formula Composition
Polyether polyol PPG
Polyether polyol (polyether for short) is an organic polymer, which is prepared by addition polymerization reaction of starting agent (compound containing active hydrogen group) with ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), etc. in the presence of catalyst. Polyether polyols used in polyurethane common soft foam sponge are mainly 3 functional 3000 molecular weight and 3500 molecular weight polyether. There are also bio-based polyether polyols that use vegetable oil instead of propylene oxide as long-chain monomer.
| Model | hydroxyl value (mgKOH/G) | acid value (mgKOH/g) | Moisture% | PH | APHA | appearance | viscosity mpa.s/25 ℃ | potassium/sodium ion ppm |
|---|---|---|---|---|---|---|---|---|
| 3000 molecular weight | 54-58 | ≤ 0.1 | ≤ 0.1 | 5.5-7.0 | ≤100 APHA | colorless transparent liquid | 550-750 | ≤ 6 |
| 3500 molecular weight | 46-50 | ≤ 0.1 | ≤ 0.1 | 5.0-7.0 | ≤100 APHA | colorless transparent liquid | 550-850 | ≤ 6 |
polymer polyol POP
polymer polyol, also known as vinyl polymer grafted polyether polyol, or POP for short, is generally white or light milky yellow in appearance. It is a polyol containing organic fillers and can replace inorganic fillers. It can not only make polyurethane foam have high load-bearing capacity and good rebound performance, but also improve the cell structure and physical and mechanical properties of the foam. In the production process of soft foam sponge, 13% with 3000 molecular weight polyether as substrate and polymer polyol with 45% solid content should be used. In addition, there are polymer polyols with solid content of 10%, 15% and 25%.
| brand | hydroxyl value (mgKOH/G) | Moisture% | PH | appearance | viscosity mpa.s/25 ℃ | solid content% |
|---|---|---|---|---|---|---|
| POP-2045 | 28-32 | ≤ 0.1 | 7.0-9.0 | milky white liquid | ≤ 5000 | 45% |
| POP-2013 | 38-44 | ≤ 0.1 | 7.0-9.0 | milky white liquid | ≤ 1500 | 13% |
toluene diisocyanate TDI
toluene diisocyanate, commonly known as TDI, is a commonly used polyisocyanate. It is mainly used to produce flexible polyurethane foam and polyurethane elastomers, coatings, adhesives, etc. The common TDI brand is T-80, in addition to T-100 and T-65.
| products | 2,4-TDI% | 2,6-TDI% | APHA | hydrolyzable chlorine% | Purity% | acid value (mgKOH/g) |
|---|---|---|---|---|---|---|
| T-80 | 80.0 +/-2.0 | 20.0 +/-2.0 | ≤ 40 | ≤ 0.01 | ≥ 99 | ≤ 0.006 |
foaming agent
to prepare polyurethane foam, namely water and low boiling point compounds. The low boiling point compound is mainly dichloromethane.
| Name | acid value (HCL)% | Moisture% | Purity% | Chroma (Pt-Co) |
|---|---|---|---|---|
| dichloromethane | ≤ 0.0004 | ≤ 0.04 | ≥ 99.9 | ≤ 10 |
homogenizing agent
The foaming agent used in polyurethane soft sponge is mainly silicone surfactant.
catalyst
polyurethane catalysts can be basically divided into tertiary amine catalysts and organometallic compounds (including carboxylates and alkyl compounds) according to their chemical structure types. Both will be used in common soft foam formula, mainly A1,A33,DMEA,DEOA,TEOA, T-9 and T-12, etc.
color paste
polyurethane has good dyeability. By adding dyes or pigment color paste, polyurethane foam, especially polyurethane soft foam, can be made into brightly colored products.
flame retardant
TDCP is one of the best flame retardants and durability among phosphorus-chlorine flame retardants. It can be widely used in the production of soft and rigid polyurethane foam, polyvinyl chloride, epoxy resin, unsaturated resin, polyester fiber, rubber and conveyor belt. In addition to self-extinguishing, the obtained products can also improve light resistance, Water resistance, antistatic and improve product gloss.
