SU1523561A1 - Antiadhesive composition for coating moulds used in moulding polyurethane articles - Google Patents

Abstract

The invention relates to anti-adhesive compositions for coating the surface of molds used in the manufacture of polyurethane products, such as shoe soles. The invention allows to increase the number of product removals up to 60-70, to improve the quality of their surface up to 5 points, to improve their durability with polyurethane varnish. At the same time after the removal of products on the surface there are no grease residues. The composition includes, in parts by weight: polymethylphenylsiloxane (resin K-9) 100-120, polydimethylsiloxane with conditional viscosity according to OT-1 90-150 s (rubber SKTN-A) 10-12, γ-aminopropyltriethoxysilane (product AGM-9 2-4, polymethylhydride-siloxane with an active hydrogen content of 1.30-1.42 wt.% (GKZH-94) 2-4, tin octoate 0.1-0.3 and perchlorethylene 1600-2000. The composition is prepared by dissolving all components in perchlorethylene, except tin octoate, followed by mixing this solution with a solution of tin octoate in the same solvent. 1 tab.

Description

one

(21) 4312027 / 23-05

(22) 10/02/87

(46) 11/23/89. Bul N- ° 43

(71) All-Union Scientific Research Institute of Film Materials and Artificial Leather

(72) M.O. Sadkovsk, G.I. Mitropolsk, V.P.Ulnov, V.I.Gudimenko

and V.M. Kopylov

(53) 678.026.3 (088.8)

(56) USSR Author's Certificate No. 513862, cl. B 29 C 33/64, 1974.

(54) ANTI ADHESIVE COMPOSITION FOR COATING FORMS USED FOR FORMING POLYURETHANE PRODUCTS

(57) The invention relates to anti-adhesive compositions for coating the surface of molds used in the manufacture of polyurethane products, such as shoe soles. The invention allows to increase the number of removals.

products up to 60 - 70, to improve the quality of their surface to 5 points, to improve their dyeing with polyurethane varnish. At the same time after the removal of products on the surface there are no grease residues. The composition includes, wt.: Polymethylphenylsiloxane (resin K-9) 100 - 120; polydimethylsiloxane with conditional viscosity according to VZ-1, 90-150 s (SKTN-A rubber) 10 - 12; aminopropyltriethoxysilane (product AGM-9) 2-4; polymethylhydrile siloxane with an active hydrogen content of 1.30 - 1.42 wt.% (GKZH-94) 2-4; tin octoate 0.1 - 0.3; perchloroethylene, 1600 - 2000. The composition is obtained by dissolving in perchlorethylene all components except tin octoate, followed by mixing this solution with tin octoate solution in the same solvent. 1 tab

This invention relates to anti-adhesive compositions for coating molds in which polyurethane products are made, for example shoe soles.

The aim of the invention is to increase the number of product removals and improve the quality of their surface.

As a polymethylphenylskloxane, the composition contains a K-9 resin with a volatile content of not more than 3% and a softening temperature of 60 -, as the polydimethylsiloxane, SKTN-A rubber, as the tr-aminopropyltriethoxysilane - product

AGM-9, as polymethylhydride-silyoxane with a content of active hydrogen of 1.3 - 1.42%, is a product of GKZH-94.

The composition is prepared by dissolving polymethylphenylsiloxane, polydimethylsiloxane, -atm-nopropyltriethoxysilane, and polymethylhydride-siloxane in perchlorotylene, and then mixing this solution with an oxol solution in the same solvent.

The composition is sprayed onto an aluminum mold at 20-25 ° C, and then the mold is heated at 200-210 ° C for 60 to 80 minutes.

ABOUT

N5

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Ksa

31523561

The compositions and properties of coatings based on them are given in the table,

the following ratio of components, ma.ch .:

Polymethylphenylsilox

Claims (1)

Claims $ An anti-adhesive composition for coating molds used in the molding of polyurethane products, including polymethylphenylsiloxane and a solvent, characterized in that, in order to increase the number of product removals and improve their surface quality, it contains perchlorethylene as a solvent and additionally contains polydimethylsiloxane with conditional viscosity VZ-1 90–150 s, p-aminopropyltriethoxysilane, polymethylhydride-siloxane with an active hydrogen content of “1.30 - 1.42 wt.%, And tin octoate at the following ratio of components, parts by weight: Polymethylphenyl siloxane Polydimethylsiloxane uaminopropyltriethoxysilane Specified polymethylhydride-siloxane Octoat tin Perchlorethylene 100 - 120 10 - 12 2 - 4 2-4 0.1 - 0.3 1600 - 2000 Indicators The value of the indicators for example 1 μ | s | a 1 5 | & | ₇ 18 | ' eleven eleven T '^;"T ^{: r} T Famous Components, parts by weight: polymethyl * phenylsiloxane 100 120 ,ten polydimethylsiloxane ten 12 ,one ^ aminopropyltriethoxysilane 2 four 3 polymethylhydride-siloxane 2 four 3 octoate tin 0.1 0.3 0.2 perchlorethylene , 600 2000 1800 dichloroethane - - - Properties: number of removal 60 70 66 quality surface score · five five five dyeability of 10 samples , 0 ten ten Availability residues grease on product surfaces Not but Not Not 90 130 ,ten 110 1.0 9 13 9 3 one, one five 3 3 one one five 3 3 3 0.05 0.4 0.2 0.2 0.2 ' 1800 1800 , 800 , 500 2100 - - - 48 55 47 37 39 five five five four five ten , 0 ten eight ten • Not there is there is Not Not. 110 ,ten 110 1.0 BY eleven eleven one, . one, eleven five 3 3 3 3 3 one five 3 3 0.2 0.2 0.2 0.05 0.4 1800 1800 , 800 1800 1800 - - - - - 42 53 57 about 12 52 five five four 3 five ten ten ten eight ten Not there is there is there is Not Note. Examples 4-13 control. Coloring is made by a polyurethane varnish.