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Polyurethane composite materials

Introduction
Parameters

Polyurethane composite materials are used in cold storage of painting equipments and other facilities on demand of high heat insulation. It consists of polyhydric alcohol, foaming agent, catalyst, and other auxiliary agents according to most optimized proportion. It is directly used for foaming in place with the properties of good fluidity, even abscess, high strength, fine stability of low temperature dimension, and low thermal conductivity, etc.

Casting:
Composite materials (component A) and PAPT (component B) is mixed according to weight ratio (A: B=1:1), adopting mechanical agitation with time of 10-20s and speed of 400rpm. It should be immediately slaking in the casting mould after even agitation. It is best for mould temperature at 30-40 and environment temperature at 15-20 (Adding materials according to product density).

Packing and storage of composite polyether:
Because of high moisture absorption, it must be fully airproofed when not in use for moisture proof. So it should be stored in dry, shade and ventilated rea with the best storage temperature of 15-20.
In the transportation, it should be carefully examined to prevent barrel from knocking with other metals avoiding leak proof. Barrel cover can not be screwed at will to resist raw materials evaporating or absorbing moisture.
Raw material is packed in galvanized iron barrel weighting 200kg, and the qualified certificate is stuck on top of the barrel.

Ò»¡¢Technical index of casting hard foam composite polyether

It is used for all kinds of heat-preserving projects which adopt casting construction technology, e.g. heat supply pipeline, tank heat preservation, heat-preserving vehicles and other irregularly shaped heat-preserving projects.	appearance	yellow transparent liquid
	viscosity(mPas 25 )	30030
	hydroxyl value(mgKOH/g)	30020
	acid value(mgKOH/g)	0.5
	specific gravity(g/ml)	1.3154
	water content(%)	0.2
	density(%)	35-55
	cream time(s)	153
	gelation time(s)	605

¶þ¡¢Technical index of spraying hard foam composite polyether

It is used for all kinds of heat-preserving projects which adopt spraying construction technology, e.g. heat preservation of cold storage, tank, roof and other irregularly shaped heat-preserving projects.	appearance	light red transparent liquid
	viscosity(mPas 25 )	22030
	hydroxyl value(mgKOH/g)	25020
	acid value(mgKOH/g)	0.5
	specific gravity(g/ml)	1.2936
	water content(%)	0.2
	density(%)	30-50
	cream time(Ãë)	21
	gelation time(Ãë)	101

Èý¡¢Technical index of pipe-in-pipe hard foam composite polyether

It is used for heat-preserving projects which adopt casting machine casting construction technology, e.g. refrigerator and freezer, solar heat-preserving cylinder and resourceful pipe-in-pipe.	appearance	yellow transparent liquid
	viscosity(mPas 25 )	24030
	hydroxyl value(mgKOH/g)	25020
	acid value(mgKOH/g)	0.5
	specific gravity(g/ml)	1.3520
	water content(%)	0.2
	density(%)	45-65
	cream time(s)	153
	gelation time(s)	10010

ËÄ¡¢Technical index of high-temperature resistant hard foam composite polyether

It is used for all kinds of polyurethane heat-preserving projects with temperature resistance over 110 which adopt casting machine casting, manual casting or spray painting equipment spraying construction technology, especially for heat pipeline and high-temperature storage tank.	appearance	light red transparent liquid
	viscosity (mPas 25 )	18030
	hydroxyl value(mgKOH/g)	25020
	acid value(mgKOH/g)	0.5
	specific gravity(g/ml)	1.3950
	water content(%)	0.2
	density(%)	40-60
	cream time(s)	153
	gelation time(s)	605

Îå¡¢Technical index of strong fire-retardant hard foam composite polyether

It is used for all kinds of polyurethane heat-preserving projects with special fire retardance which adopt casting machine casting, manual casting or spray painting equipment spraying construction technology, especially for heat-preserving construction of overhead pipeline and city high-rise building with strict fireproof requirements.	appearance	Light yellow transparent liquid
	viscosity (mPas 25 )	26030
	hydroxyl value(mgKOH/g)	28020
	acid value(mgKOH/g)	0.5
	specific gravity(g/ml)	1.3150
	water content(%)	0.2
	density(%)	40-60
	cream time(s)	153
	gelation time(s)	605

Physical Properties

specific gravity(20 )	1.1~1.2
net value(mgKOH/g)	400~500
flash point(20 )	135~145
viscosity(20 mPa¡¤s)	120~200
appearance	amber liquid
storage steady period	six months

Reaction characteristics with isocyanate

material temperature( )	21~23
cream time (s)	1~5
fiber time(s)	5~18
non-cohesive time(s)	7~20

The reactivity can be adjusted according to customers' needs.

Performance of typical foam

density(kg/m³)	30~60	thermal conductivity(20)(W/m.K)	0.022
dimensional stability(-20C,72hr,%)	1.0	compressive strength(kpa)	100

Safety and Protection:
When using polyurethane composite materials, the operator must wear rubber gloves, goggles, protective suit, and the rubber gloves must be frequently replaced. The working environment must be well-ventilated, and the equipments must be checked periodically and kept clean. After operation, it must be cleaned up completely.
There is light-concentration accessory ingredient, e.g. activator, so the composite polyether has slight toxicity.
When touching with skins, it must be washed thoroughly with water. If there is still tingling sensation, the operator must be immediately sent to hospital for treatment.
When touching with eyes, it must be washed for at least 15 minutes with water, and then the operator must be immediately sent to hospital for treatment.

Burning and Danger:
Polyurethane composite materials will burn easily on fire like the majority of organic materials.