阅读说明：本技术 一种聚氨酯发泡原料 (Polyurethane foaming raw material ) 是由 刘鹏 吴园 江峰 于 2020-07-23 设计创作，主要内容包括：本发明公开了一种聚氨酯发泡原料,属于发泡料技术领域。本发明包括白料和黑料；白料和黑料的质量比为1.1-1.4；黑料为二苯基甲烷二异氰酸酯；白料由以下重量份的原料制成：聚酯多元醇Ⅰ35-45份、聚酯多元醇Ⅱ35-50份、聚酯多元醇Ⅲ15-35份、水1-2份、助剂2-4份。本发明的聚氨酯发泡原料可对两个不规则的接触面进行粘接,并可在两个不规则的接触面填充均匀,具有良好的保温性能及较大的粘度,适合推广应用。(The invention discloses a polyurethane foaming raw material, and belongs to the technical field of foaming materials. The invention comprises white material and black material; the mass ratio of the white material to the black material is 1.1-1.4; the black material is diphenylmethane diisocyanate; the white material is prepared from the following raw materials in parts by weight: 35-45 parts of polyester polyol I, 35-50 parts of polyester polyol II, 15-35 parts of polyester polyol III, 1-2 parts of water and 2-4 parts of auxiliary agent. The polyurethane foaming raw material can be used for bonding two irregular contact surfaces, can be uniformly filled in the two irregular contact surfaces, has good heat preservation performance and larger viscosity, and is suitable for popularization and application.)

1. A polyurethane foaming raw material is characterized by comprising a white material and a black material; the mass ratio of the white material to the black material is 1.1-1.4;

the black material is diphenylmethane diisocyanate;

the white material is prepared from the following raw materials in parts by weight:

2. the polyurethane foaming material as claimed in claim 1, wherein the polyester polyol I has a hydroxyl value of 310mgKOH/g and a viscosity of 2500-4000(25 ℃) mPas.

3. The polyurethane foaming material as claimed in claim 1, wherein the polyester polyol II has a hydroxyl value of 410mgKOH/g and a viscosity of 2000-4000(25 ℃) mPas.

4. The polyurethane foaming material as claimed in claim 1, wherein the polyester polyol III has a hydroxyl value of 310mgKOH/g, and a viscosity of 13000-23000(25 ℃ C.)/mPas.

5. The polyurethane foaming raw material according to claim 1, wherein the auxiliary agent comprises a catalyst and a stabilizer.

Technical Field

The invention belongs to the technical field of foaming materials, and particularly relates to a polyurethane foaming raw material.

Background

With the development of the technology, parts with uneven contact surfaces need to be adhered together and have the function of heat preservation on some products. For example, flat vacuum insulation panels (hereinafter referred to as "VIP panels") are bonded to the cabinet with the condenser on both sides of the refrigerator cabinet. The condenser is a round long pipe (the outer diameter is 4.7mm), the long pipes are arranged on two sides of the product in an S-shaped dense mode (the interval of each row is about 100mm), when the VIP plate is directly attached to the condenser, due to the blocking of the outer diameter, the attachment is not tight enough, and a gap is reserved in the middle. This can cause the VIP panel to debond, affecting appearance. Meanwhile, the edge effect of the VIP board is increased, and the heat insulation performance of the VIP board is influenced, so that the heat insulation performance of the whole product is reduced. It is comparatively common to adopt the hot melt adhesive injection machine to spout the hot melt adhesive that one deck thickness surpassed the condenser external diameter on the refrigerator curb plate among the prior art, then paste the VIP board, but this mode hot melt adhesive quantity is great, and the cost is higher, and hot melt adhesive thermal insulation performance is relatively poor simultaneously, influences whole thermal insulation performance. Therefore, it is desired to develop a polyurethane foaming material in order to solve the above problems.

Disclosure of Invention

The invention aims to provide a polyurethane foaming raw material, and solves the existing problems.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a polyurethane foaming raw material, which comprises a white material and a black material; the mass ratio of the white material to the black material is 1.1-1.4;

the black material is diphenylmethane diisocyanate;

the white material is prepared from the following raw materials in parts by weight:

further, the polyester polyol I has a hydroxyl value of 310mgKOH/g and a viscosity of 2500-.

Further, the polyester polyol II has a hydroxyl value of 410mgKOH/g and a viscosity of 2000-4000(25 ℃ C.)/mPas.

Further, the polyester polyol III had a hydroxyl value of 310mgKOH/g and a viscosity of 13000-23000(25 ℃ C.)/mPas.

Further, the auxiliary agent comprises a catalyst and a stabilizer.

The invention has the following beneficial effects:

the polyurethane foaming raw material can be used for bonding two irregular contact surfaces, can be uniformly filled in the two irregular contact surfaces, has good heat preservation performance and larger viscosity, and is suitable for popularization and application.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention relates to a polyurethane foaming raw material, which comprises a white material and a black material; the mass ratio of the white material to the black material is 1.1-1.4;

the black material is diphenylmethane diisocyanate;

the white material is prepared from the following raw materials in parts by weight:

among them, the polyester polyol I is preferably CF-6320 available from Nanjing Kangplast chemical Co., Ltd, having a hydroxyl value of 310mgKOH/g and a viscosity of 2500-.

Among them, the polyester polyol II is preferably CF-8420 produced by Nanjing Kangplastde chemical Co., Ltd, having a hydroxyl value of 410mgKOH/g and a viscosity of 2000-4000(25 ℃ C.)/mPas.

Among them, polyester polyol III is preferably CF-6300, manufactured by Nanjing Kangplastde chemical Co., Ltd, having a hydroxyl value of 310mgKOH/g and a viscosity of 13000-23000(25 ℃ C.)/mPas.

Wherein the auxiliary agent comprises a catalyst and a stabilizing agent.

The refrigerator heat-insulating layer is also formed by foaming polyurethane foaming materials, although the refrigerator heat-insulating layer and the refrigerator heat-insulating layer in the prior art are both polyurethane materials, the refrigerator heat-insulating layer and the refrigerator heat-insulating layer are obviously different from each other, and the polyurethane foaming raw materials of the refrigerator heat-insulating layer and the refrigerator heat-insulating layer in the prior art are mainly different from the polyurethane foaming materials commonly used in the prior art in that:

(1) black materials: the black material of the polyurethane foaming raw material adopts diphenylmethane diisocyanate (MDI for short); in the prior art, the black material of the common polyurethane foaming material is polyphenyl polymethylene polyisocyanate, crude MDI or PAPI for short, which is an oligomer of MDI;

(2) white materials: the white material is a mixture, and the white material of the polyurethane foaming raw material is a mixture consisting of a plurality of polyester polyols (the content ratio is more than 95 percent), water and an auxiliary agent; in the prior art, the white material of the common polyurethane foaming material is a mixture of a plurality of polyether polyols (the content ratio is more than 95 percent), water and an auxiliary agent;

(3) foaming agent: the polyurethane foaming raw material does not need a foaming agent; in the prior art, a common polyurethane foaming material must use a foaming agent, which is cyclopentane, 245fa, LBA and the like generally;

(4) free density after molding: the free density of the polyurethane foaming raw material after foam molding is 50-60kg/m³(ii) a In the prior art, the natural density of the common polyurethane foaming material after foam forming is 20-25kg/m³；

(5) Viscosity of raw materials: the polyurethane foaming raw material has higher viscosity; in the prior art, the viscosity of common polyurethane foaming materials is low.