JPS61152720A - Production of soft polyurethane foam laminatable by flame lamination - Google Patents

Abstract

PURPOSE:To obtain a soft polyurethane foam capable of being bonded with a skin material easily in sufficiently high bonding strength by flame-lamination, easily and economically, by mixing a specific polyol and a specific amount of an aromatic phosphoric acid ester compound to an organic polyisocyanate, etc., and reacting the components with each other. CONSTITUTION:The objective soft polyurethane foam can be produced by mixing and reacting (A) a polyol composed of 60-10pts.(wt.) of a di or tri-functional polyester ether polyol and 40-90pts. of a trifunctional polypropylene glycol adduct, (B) 3-20pts. of an aromatic phosphoric acid ester compound (e.g. triphenyl phosphate) as an agent for modifying flame-lamination characteristics, and (C) an organic polyisocyanate, a foaming agent, a foam stabilizer, a catalyst, a flame retardant, a surfactant, etc. USE:An interior material for automobile, furniture, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This invention is applicable to cushioning materials such as cushioning skin materials and ceiling materials for automobile seats, sofa upholstery materials for furniture, and bed upholstery materials. The present invention relates to a method for manufacturing a soft polyurethane foam that can be laminated with a skin material as a cushioning material of a cushioning composite material made of a skin material such as cloth or leather stretched together.

(Prior technology) In recent years, flexible polyurethane foam has been laminated with other sheet-like materials such as fabric and leather to provide cushioning properties and is widely used in automobile interior materials and furniture as a surface material with good texture and volume. has been done.

Bonding methods include using adhesives and directly bonding the surface of the flexible polyurethane foam to fabric using high-frequency cuelder or flame. The so-called flame lamination is an efficient method that does not require a drying process and has a fast adhesion speed, so it has been industrially established and widely used as a method for laminating flexible polyurethane foam and other sheet materials. .

As such flexible polyurethane foams capable of frame lamination, those using polyester polyols are conventionally known.

(Problems to be Solved by the Invention) However, although polyester urethane foam can be used for frame lamination, the foam has a large compression set and sag, which is a major drawback for long-term use as a cushioning material. IS has disadvantages in that the material itself is expensive, the viscosity of the liquid material is high, and it is difficult to handle in production. - Polyether polyols, which are known as polyols used in general flexible polyurethane foams, are inexpensive and useful, and foams made using this polyol have excellent physical properties as cushioning materials, such as elasticity, compression set, and stiffness. However, flame lamination was difficult due to the low adhesion of the foam during thermal decomposition.

The object of the present invention is to solve these problems and provide a foam that allows the use of a large amount of inexpensive polyether polyol and that can be flame laminated.

(Means for Solving the Problems) That is, the present invention provides a method for producing flexible polyurethane foam by mixing and reacting an organic polyisocyanate with a polyol, a blowing agent, a foam stabilizer, a catalyst, and other additives. , 60 to 10 parts by weight of a di- to trifunctional polyester ether polyol and 90 parts by weight of a trifunctional polypropylene glycol adduct 4ON, B. 3 to 20 parts by weight of an aromatic phosphate ester compound as a flame lamination property modifier. A method for producing frame-laminable flexible polyurethane foam, using the following methods: As shown in Japanese Patent Publication No. 400'78, polyester ether polyol, flexible polyurethane foam produced using this polyol is easily melted by heat, and is suitable for frame lamination).
It is a polyol with excellent properties, for example, the general formula % formula % (where R is a saturated aliphatic or aromatic polycarboxylic acid residue, A is a ring-opened residue of a compound having a cyclic ether group, L
is a number larger than the average l, □m is 0 or l, and is a polyol having a structure in which a chain consisting of a polyester structure shown by n is blocked at the end of a polyether structure.

The polyol used in combination with the general flexible polyurethane foam is a trifunctional polypropylene glycol adduct.

Polyester ether polyol and polypropylene glycol adduct are used together in a ratio of 60/40 to 1 O/90, and polyester ether polyol is 60/40 to 1 O/90.
When the amount exceeds 0 parts by weight, the compressive residual strain of 7 ohms becomes large.
It is practically undesirable for use as a cushion material due to its large sag, and if the amount is less than 10 parts by weight, the flame lamination characteristics will not meet a certain standard and the object of the invention cannot be achieved.

The aromatic phosphoric acid ester compound improves the 7-lamination properties and is also effective in reducing the amount of polyester ether polyol used. As the aromatic phosphate ester compound, triphenyl phosphate, tricresyl phos7:r--)b ocfl diphenyl phos7ate, cresyl diphenyl phosphate,
Examples include trixylenyl phosphate and triaryl phosphate.

This aromatic phosphate ester compound is used in an amount of 3 to 20 parts by weight; if the amount used is less than 2 parts by weight, it is difficult to obtain the desired flame lamination characteristics.
If the amount exceeds 0 parts by weight, it is no longer possible to improve the flame lamination characteristics, or the physical properties of 7 ohms are poor, the foaming stability is insufficient, and the cost increases. Other ingredients used in this invention,
Namely, organic polyisocyanate, blowing agent, catalyst, #
The fuel agent, surfactant and other additives may all be those conventionally used in making flexible polyurethane foams.

(Examples and Comparative Examples) Various physical properties of flexible polyurethane foams manufactured by foaming according to the formulations shown in Table 1 were measured using the following measuring methods.
A sheet with a length of 4,000 fins and a width of 1,400,11!11 was made, the surface was melted under conditions of a flame temperature of about 1,000°C, and it was layered and crimped with a flame-retardant treated fabric.b2011
A laminate material of 7 ohm and fabric with 11 thickness was prepared and a peel test was conducted.

Test method Density: JIII-6401 Hardness: , I8-6401 Compressive residual strain: J-6401 Tensile strength: J-6402 Tear strength: J-6402 Peel strength: J- 8-L1066 (Effects of the invention) As is clear from the above results, according to this invention,
The lamination of flexible polyurethane foam and fabric (sea lion) is easy and has sufficient adhesion strength for practical use, and the physical properties of the seven laminate itself are excellent in elasticity and durability, allowing it to be used as a cushioning material. The cost is also low because a large amount of inexpensive general-purpose polyol can be used, and when polyol is used in combination, the viscosity of the stock solution is much lower than when using polyester ether polyol alone. Therefore, it has remarkable effects such as easier handling and improved workability in manufacturing.

Claims (1)

[Claims] When producing a flexible polyurethane foam by mixing and reacting an organic polyisocyanate with a polyol, a blowing agent, a foam stabilizer, a catalyst, and other additives, A. As a polyol, a di- to tri-functional polyester ether polyol 60; ~10 parts by weight and 40 to 90 parts by weight of a trifunctional polypropylene glycol adduct; B: 3 to 20 parts by weight of an aromatic phosphate ester compound is used as a flame lamination property modifier. A method for producing flexible polyurethane foam that can be flame laminated.