CN103554897A - Hard polyurethane foaming plastic - Google Patents

Abstract

The invention discloses hard polyurethane foaming plastic which is characterized by being prepared from the following materials A and B in parts by weight by way of mixing, pouring, reacting and curing, wherein the material A comprises the following components in parts by weight: 100 parts of polyether polyol, 4-5 parts of dimethyl silicone oil, 4-5 parts of water, 3.8-4.5 parts of polyisobutene, 10-15 parts of magnesium carbonate, 5.0-7.0 parts of polyvinyl acetate emulsion, 2.3-2.5 parts of vinyl tri(beta-methoxyl ethoxyl) silane, 3-4 parts of glycerinum triacetate, 5-10 parts of barium sulfate powder, 20-30 parts of sepiolite powder, 1-2 parts of potassium isooctanoate and 6-8 parts of modified attapulgite; the material B comprises the following component of 30-40 parts of polyisocyanate. The hard polyurethane foaming plastic disclosed by the invention has the characteristics of low density, light weight and the like, has good heat insulating effect, and is power-saving, low-carbon and environment-friendly when being used for insulating materials of refrigerators and freezers.

Description

A kind of rigid urethane foam

Technical field

The present invention relates to a kind of foam, particularly a kind of rigid urethane foam.

Background technology

Urethane foam is that isocyanic ester and oxy-compound are made through polymerization foaming, by its hardness, can be divided into soft and hard two classes.Known to industry, polyurethane rigid foam plastic is widely used in the occasions such as refrigerator, refrigerator, refrigerator car, refrigerator chamber, pipeline and building, play heat insulation (insulation) effect, and polyurethane rigid foam plastic is resulting by polyurethane rigid foam combination material and isocyanate reaction, people are also accustomed to polyurethane rigid foam plastic to be called urethane foam or high molecular synthetic material.The existing maximum shortcoming of rigid foam in prior art is that average core density is high, at 35～40Kg/m3, and the deficiency of the high meeting of average core density and then following three aspects of initiation: the one, cause for the production of the raw material of porous plastics as large in the consumption of polyurethane rigid foam combination material and isocyanic ester, not only cause unreasonably wastage of material, and cause the inaction of cost to increase; The 2nd, average core density is high can produce thermal conductivity high (being 0.020～0.022W/mK at present), thereby makes the heat-insulating property of the foams after foaming poor.When the remarkable waste electric energy during as the heat-insulating heat-preserving material of refrigerator or refrigerator and so on for household electrical appliance; The 3rd, because average core density is high, when to products productions such as refrigerator or refrigerator, cause demould time long, be generally at present 8～10min, thereby affect production efficiency, production capacity is restricted.

Summary of the invention

The rigid urethane foam that the object of this invention is to provide a kind of good heat insulating.

In order to realize object of the present invention, the present invention passes through following scheme implementation:

, by the mixing of A, B material, cast, reaction, the slaking of following weight part, made:

A material: polyether glycol 100, dimethyl silicone oil 4-5, water 4-5, polyisobutene 3.8-4.5, magnesiumcarbonate 10-15, polyvinyl acetate emulsion 5.0-7.0, vinyl three ('beta '-methoxy oxyethyl group) silane 2.3-2.5, Vanay 3-4, blaue fixe 5-10, sepiolite powder 20-30, different potassium zincate 1-2, attapulgite modified 6-8;

B material: polyisocyanates 30-40.

Described attapulgite modified preparation by the following method: the raw material that takes following weight part: attapulgite 95-110, Iron-ore Slag 1-2, stalk ashes 50-55, gypsum 3-4, vinylbenzene 2-3, xitix 2-3, Dyhard RU 100 1-2, bicarbonate of ammonia 3-4, ethyl acetate 3-4, dioctyl ester 4-5, Sodium Selenite 5-6, borax 3-4, clorafin 1-2; Preparation method puts into calcining furnace by attapulgite, Iron-ore Slag, gypsum, at 570-590 ℃, calcines 4-5 hour, takes out, mix with stalk ashes, bicarbonate of ammonia, borax, be ground to and obtain 300-400 order powder, then, then add vinylbenzene, xitix, Dyhard RU 100 to mix, continue to grind 30-45 minute, to fully disperseing, then add other remaining component, continue to grind after 30-45 minute, under 1500-1800 rev/min, stir 15-30 minute, obtain attapulgite modified.

Rigid urethane foam of the present invention, is prepared from by following concrete steps:

A is expected to each raw material mixes, grind at normal temperatures 20-30 minute, obtain slurry; B material is added in A material, 200-300 rev/min is stirred 30-45 second again; Be poured into free foaming in mould, obtain mould base; Then, together with mould, mould base is sent in tunnel type baking oven to temperature-gradient method: at 40-45 ℃, reaction 15-25 minute; At 55-65 ℃, react 10-15 minute again; At 75-85 ℃, react 5-10 minute again; Last slaking 5-7 hour at 90-100 ℃.

Rigid urethane foam of the present invention, has density low, and the features such as lightweight have the effect of good heat-insulation and heat-preservation, can saves energy for the lagging material of refrigerator, refrigerator, and low-carbon environment-friendly.

Specific embodiments

Below by specific examples, the present invention is described in detail.

, by the mixing of A, B material, cast, reaction, the slaking of following weight part, made:

A material: each parts by weight of raw materials be (weight part be kilogram): polyether glycol 100, dimethyl silicone oil 4, water 4, polyisobutene 3.8, magnesiumcarbonate 10, polyvinyl acetate emulsion 5.0, vinyl three ('beta '-methoxy oxyethyl group) silane 2.3, Vanay 3-4, blaue fixe 5, sepiolite powder 20, different potassium zincate 1, attapulgite modified 6;

B material: each parts by weight of raw materials be (weight part be kilogram): polyisocyanates 30.

Described attapulgite modified by the following method preparation: take following weight part (kilogram) raw material: attapulgite 95, Iron-ore Slag 1, stalk ashes 50, gypsum 3, vinylbenzene 2, xitix 2, Dyhard RU 100 1, bicarbonate of ammonia 3, ethyl acetate 3, dioctyl ester 4, Sodium Selenite 5, borax 3, clorafin 1; Preparation method puts into calcining furnace by attapulgite, Iron-ore Slag, gypsum, at 570-590 ℃, calcines 4-5 hour, takes out, mix with stalk ashes, bicarbonate of ammonia, borax, be ground to and obtain 300-400 order powder, then, then add vinylbenzene, xitix, Dyhard RU 100 to mix, continue to grind 30-45 minute, to fully disperseing, then add other remaining component, continue to grind after 30-45 minute, under 1500-1800 rev/min, stir 15-30 minute, obtain attapulgite modified.

Rigid urethane foam of the present invention, is prepared from by following concrete steps:

A is expected to each raw material mixes, grind at normal temperatures 20-30 minute, obtain slurry; B material is added in A material, 200-300 rev/min is stirred 30-45 second again; Be poured into free foaming in mould, obtain mould base; Then, together with mould, mould base is sent in tunnel type baking oven to temperature-gradient method: at 40-45 ℃, reaction 15-25 minute; At 55-65 ℃, react 10-15 minute again; At 75-85 ℃, react 5-10 minute again; Last slaking 5-7 hour at 90-100 ℃.

Each functional parameter of the material of gained is as follows: compressive strength (MPa): 0.26, and oxygen index: 23, thermal conductivity (W/mK): 0.036.

Claims (1)

1. a rigid urethane foam, is characterized in that being made by the mixing of A, B material, cast, reaction, the slaking of following weight part:

A material: polyether glycol 100, dimethyl silicone oil 4-5, water 4-5, polyisobutene 3.8-4.5, magnesiumcarbonate 10-15, polyvinyl acetate emulsion 5.0-7.0, vinyl three ('beta '-methoxy oxyethyl group) silane 2.3-2.5, Vanay 3-4, blaue fixe 5-10, sepiolite powder 20-30, different potassium zincate 1-2, attapulgite modified 6-8;

B material: polyisocyanates 30-40;

Described attapulgite modified preparation by the following method: the raw material that takes following weight part: attapulgite 95-110, Iron-ore Slag 1-2, stalk ashes 50-55, gypsum 3-4, vinylbenzene 2-3, xitix 2-3, Dyhard RU 100 1-2, bicarbonate of ammonia 3-4, ethyl acetate 3-4, dioctyl ester 4-5, Sodium Selenite 5-6, borax 3-4, clorafin 1-2; Preparation method puts into calcining furnace by attapulgite, Iron-ore Slag, gypsum, at 570-590 ℃, calcines 4-5 hour, takes out, mix with stalk ashes, bicarbonate of ammonia, borax, be ground to and obtain 300-400 order powder, then, then add vinylbenzene, xitix, Dyhard RU 100 to mix, continue to grind 30-45 minute, to fully disperseing, then add other remaining component, continue to grind after 30-45 minute, under 1500-1800 rev/min, stir 15-30 minute, obtain attapulgite modified.