SU1608066A1 - Composition for antiadhesive films - Google Patents

Abstract

This invention relates to compositions for an anti-adhesive film on the surface of elastic forms, gas-tight to amines released during casting in molds of products from thermosetting polymer compositions based on epoxy, polyurethane, etc. resins and structuring agents with functional amino groups. The purpose of the invention is to increase the gas tightness to amines. The composition includes the following components, wt%: gum arabic 30.27-34.31

glycerin 15.67-17.76

sugar 5.02-5.69

animal bile 0,27-0,31

ethyl alcohol 0,34-0,38

graphite 15.0-25.0

water 23.43-26.55.

Description

The invention relates to toolmaking and can be used in all sectors of the national household engaged in the manufacture of products from molded thermosetting polymeric materials in elastic forms.

The aim of the invention is to increase the gas tightness to amines of adhesive films of elastic forms.

Example 1. According to a model made of steel with an accuracy of production of 12 quality and with a surface roughness of Ra of 0.1 µm, an elastic form (matrix and punch) of polysiloxane (silicone) rubber KLSE- and a vulcanization system of tetraethoxysilane and tanethyldyluroxane- stan- tum, taken in the ratio of 100: 4 by weight, on a complex-shaped product, the vibrator knob. Before casting a plastic product in a mold, it is sprayed onto the forming surface by spraying five layers of the proposed composition with the following ratio of ingredients, wt%:

Arabic gum 34,31

Distilled dynamite glycerin17,76

Sugar5,69

Animal bile0.31

Ethyl rectified alcohol. 0.38

Graphite grade GS-115

Distilled water26,55

After creating on the surface of an elastic form anti-adhesive lawn-. amine-permeable films fabricate plastic parts from an epoxy resin and amine hardener molding resin composition based on successive deposition of the cladding and structural layers. The facing layer is applied to the surface of the mold with a soft (core) brush, and the construction layer is applied by pouring into the mold through the sprue channel. The composition of the facing and constructional layers is the following, mac.ch .:

facing layer Epoxy-Dianova resin

cl

with

oh oh oh oh oh

15

100

20

with contained / 1 :-) fioKCyi, c: -iLjv groups,:%

I ICE l 1 E l S i i 1: (I I / a M fi h bi.

brand A

Mapite Graphite

Aerosil M.iuKM A-175

construction layer

E to about with with and dn about-d 1 and i- i about z and with; 11. a

with content 3 it5i: c i itnjx

groups, 20%

P about l I l these l t; i I p o l i m and i; s,

brand A

Graphite mark

After curing, 1 composi.i form (matrix and punch) separate and remove the plastic MaAe / r-ie the expense of the upszugoy, pefOrMaTsMI with GAN. FORGS IN H: ORME EXT / 1 g CGT

120 HIT. products, while the scatter surface 1 and the uiepoxonaTocTb surface constitute the composition 12 kpaltegi Ra-O.I microns, t, e. corresponds to the nafiaMeTparvi of the original model.

EXAMPLE 2. According to a model made of polymethyl methacrylate with an accuracy of manufacturing 14 in quality and with a rough surface of Ra, 8 µm, an elastic shape is made on the plastic product, the setting knob is as in Example 1, On (bojiMoo6pa3yiO 4yio over : :(; c Ti, isgo:; shared (bopfvib naked with a brush; we suggest: - the composition of the following ss-otnoemii of Graders, wt.%,:

ryiv.M iaoaonK

, / -, isti ll and rov ny v, dt. n glycer / sh

Cax. p-ri; :: i; K

Fatty; but

Ethylo1 :: 1st review; ; fm | (opa

(.1 TeXrV 4eCl l i: i С (

Gr, f / iaDKi .; HS-i

Dmsti tlirovannag nri P; /

L 3;,; With P1chkhoi form iz- (coax oiih, - iiyio, brocade, iustlastism, sz, s, (pen ;; chg;,: 00. I i / iT KOh; no 3i / iij, i in c /ie,;iy:;j.iei О :: About С 1 Avz, mg;

Azo ts. to siio-xmi, pa CM (j. ;; -; (product g; cdmch sation of amine and an;); lor td

 in mcd; th c); v; ei:.

soderhapiemi zpo: (h / 1dp; h (

FUP:;, 30% of ZTU1LeTGDia; -.- 1 / :; 10 | .; eT1 gg ;;;; nol

graphite 1 1gch (and GG -1, S-: erssi /; grade A- 175

Cie. EE rides in Example 1 is more than Tiijps once and increased by 1 curing of gaseous amines. Plastic technology

similar to Example 1, 100 products were made in alaggic form, I M) / a fOM size 1-) and the accuracy of the products and the IjoxotiaTocTb of their surface corresponds to -) agram from the model.

JT pamme R 3. On a molded plastic product (automobile) made of acrylonitrile butadiene styrene plastic with an accuracy of 16 and with a roughness of surface surface Ra of 1.6 microns,

to make a galeE anoplastic form for

J and I, p o, d, p a v l le 11 e m te r m a p l a hundred c. Because. the molded mass mass made of acrylonitrile butadiene styrene plastic is not:;; - used directly as

a model for electroforming (due to the non-10% of the material to chemical and electrolyte solutions), it is required to make a model that meets the requirements of electroforming. For this cast

the plastic product is made of an elastic form, on the working surface of which is applied by pouring the proposed composition with the following sootouieiU iH ingredients, wt.%:

Arabic gum 30,27

/ 1, and with r and l l and r about in G | -1 S and D And TT and m; .tnch | th glit1er / n15.67

Sugartesq5.02

Lively Kel-1b0.27

E / Yu hekgifikovapnoj technical alcohol 0.34

Graphite mark

Dist-Illiroanna5; water23.43

In the form of ex:, plastic articles are wired; 1a (mode;.;) I-ia (compo 14 C1 1 and based on et-oxa, |, io smo, i amf og og hardener. GOST KO.inf; 3i / u. ii ii v t technologists; manufactured and i & 1 ich. ibie example 1,

iO4Ho ;; ib iztotoilenip and roughened locus of the models,; /; zgotovlechn; x

B,: For practical forg.1ah, it corresponds to the iiapa-lerpaM of the flat mass. is used as a reference for

 13; caught || And elastic forg / 1Y.

8 further.1e, m on the surface of the fabricated models, is a conductive

layer (by means of chemical copper

; ts sulfide) and precipitated in galvano: 1 /: ast1 n; es1ch01l yCTaujBiJe t-: a model of art; lav

 iT Ke / ib kozl, that i-i (- w su / | 1h (:) aminovolislye electrolytes) thereby obtaining

Fg.rmu, ll pouring by /, pressure isdelt: /; of

rrvTi-Ton / iacTOB

 Hmper 4. io fashion / P 1 manufactured

 h; |, /: And with exact. SYU manufacture TO 12

with a surface roughness of 1 µm, as in Example 1, an elastic form on a plastic product is made using a vibrator knob. A protective gas-tight coating on an elastic form known (in the form of a film). To do this, a 10% solution is prepared, consisting of a copolymer of vinylidene and acrylonitrile (taken in a ratio of 80:20, respectively) in methyl ethyl ketone. The solution is sprayed onto the form (5 layers) with intermediate drying between the layers for 30 minutes and after applying the last layer for 1 hour. As a result of evaporation of the volatile part of the solution, a continuous gas-impermeable amine film is formed on the form. A plastic form is made in an elastic form. 120 pcs. of the composition shown in Example 1. After removing each product to

a protective film is again applied to the forming surface of the mold.

After manufacturing 120 pcs. products measure the dimensional accuracy and surface roughness 25: 16 quality and roughness parameter Ra 1.6 µm, i.e. about 5 10 15

0

five

a significant decrease in the dimensional accuracy and an increase in the surface roughness compared with the initial parameters of the model due to the swelling of the elastic material in methyl ethyl ketone.

Claims (1)

Invention Formula An anti-adhesive film composition consisting of a high molecular weight compound, targeted additives and a solvent, in order to increase the gas tightness to amines, it contains gum Arabic as a high molecular weight, and glycerol, sugar is used as a targeted additive. , animal bile and graphite, and as a solvent - ethyl alcohol and water in the following ratio of initial components, wt.%: Gum Arabic30,27-34,31 Glycerin15,67-17,76 Sugar5.02-5.69 Animal bile 0.27-0.3f Ethyl alcohol 0.34-0.38 Graphite15.0-25.0 Water 23,43-26,55