SU833455A1 - Antiadhesion coating for separating moulded foam-polyurethane articles - Google Patents

Description

The invention relates to the preparation of anti-adhesive compositions, namely, lubricants for forms in the manufacture of products from elastic, integral and semi-rigid polyurethane foam. (LPU). In particular, the anti-adhesive lubricant can be used in the manufacture of parts from a polyvinylchloride film duplicated by a semi-rigid CPU, seat cushions from an elastic Sh1U and armrests from an integral Sh1u dl. passenger cars. A known anti-adhesive lubricant is used to form a semi-rigid and integral polyurethane foam, which includes wt.%: Petrolatum 10-30; polyalkylstoxane 3-15, .oil wax 5-15, raw brown coal wax 1-5, polyethylene wax 2-7, white spirit 12-30, halogenated hydrocarbon solvent and other. This lubricant possesses satisfactory anti-adhesive properties only for integral P11U with a limited number of molded products, after which comes the contamination of Heiffle forms with lubricant with increased separation properties and interaction with the surface of the product. The closest in technical essence and the achieved result to the proposed is anti-adhesion lubricant for separating products from semi-rigid PU foam during molding, including, wt.%: Wax base -. polyethylene wax 2-4, oxidized polyethylene wax 2-4, ceresin 4-8, fatty acid salt, for example, calcium salt of synthetic fatty acids 2-3, petroleum distillate oil 45-50, solvent — white spirit the rest J. Lubricant possesses satisfactory antiadhesive properties for forming products from semi-rigid polyurethane foam at temperatures not higher than 60-70 ° C, but cannot be used for molding products from other types of polyurethane foam,

it is characterized by non-permanent colloid stability, has unpleasant white mineral spirit.

The purpose of the invention is to enable the separation of products from any type of polyurethane foam.

This goal is achieved by the fact that anti-adhesive lubricant for separating products from polyurethane foam during molding, including wax base, fatty acid salt, petroleum distillate oil and solvent, additionally contains triacetylcellulose, silicone fluid and dimethyl phthalate in the following ratio of components, wt.%:

Wax base 1.7-19.0 Salt of fatty acid 0.05-2.0 Neft distilled oil 0.1-50

Silicone Fluid 0.1-6.0 Triacetylcellulose 0.05-0.3 Dimethyl phthalate 0.01-0.06 Solvent Remaining Lubricant prepared as follows The wax base is melted with; dispersion in an oil of distillate oil. Then the solvents are introduced, cooled to 35-40 ° C and triacetylcellulose and dimethyl phthalate in methylene chloride (solvent is introduced into the dispersion of waxes).

The solvent used is a mixture of hydrocarbon and halogenated solvents, for example, a mixture of gasoline and white spirit with dichloromethane, freon or tetrachloroethylene, lithium stearate, calcium stearate, aluminum tristearate, and calcium salts of fatty acids are used as salts of fatty acid.

The lubricant may include diphenylamine, perfume.

For example, 40 kg of polyethylene wax, 50 kg of PVO-30 polyethylene wax, 70 kg of ceresin M-80 and 10 kg of technical stearin in 500 kg of vaseline oil are melted, 1 cr of diphenylamine is added and the mixture is cooled until vigorous stirring. Then, a solution of 20 kg of calcium stearic acid and 30 kg of liquid SHS-g25 in 176.7 kg of white spirit is added and the mixture is cooled with stirring to 35-40 s. Then a solution of 2 kg of triacetylcellulose and 0, L of kg of dimethyl phthalate in 100 kg of dichloromethane is added to the mixture, and a mixture of 0.3 kg of softwood perfume is added to the mixture. The mixture is stirred for 0.5-1.0 h and poured into container containers.

In tab. I shows the composition of the resulting lubricants, in table. 2 - characteristics and properties of the compositions.

Table I

2.0 - 1.0

- 2.0

0.1 0.1 -50, 0 45, Q 37.035.0 3, 0 0.5 0.5 OST-Ostal OST-N ole, but new

m10, 012.013.0

0,200,250,30

0.04O.Oi0.06

0,3u.i; t .. 9J,

0.05 O.0

P.5

OJ 4.0

Oil

0.1

0.1

2.0

, 0

Claims (2)

Ostal Ostal-Ostal'nyi 9 As it follows from the data given in Table 2, all of the indicators of anti-adhesive compositions for different types of polyurethane foam are measured at the level of the best samples of anti-adhesive lubricants. The application of the invention allows reducing the consumption of waxes for the production of lubricants and reducing the amount of lubricant applied to the molds due to better spreading properties and formation of thin, but durable in terms of protective properties of the strand, Formula of Invention Anti-adhesion lubricant for separating products from polyurethane during molding, including a wax base, a fatty acid salt, petroleum distillate oil and a solvent, 4TOi in order to ensure the possibility of separating products from any types of polystyrene It also contains riacetylcellulose, silicone fluid and dimethyl phthalate at the following ratio of components, ass.%: Wax base 1.7-19.0 Salt of fatty acid 0.05 to 2.0 Oil distillate 0.1-50. Silicone 0.1-6.0 liquid 0.05-0.3 Triacetylcellulose 0.01-0.06 Dimethyl alat Solate Else Sources of information taken into account during the examination 1. USSR author's certificate No. 668174, cl. B 29 C 1/04, 1977. 2. USSR author's certificate No. 625351, cl. In 29 C 1/04, (prototype}.