SU539920A1 - Binder for paper laminates - Google Patents

Description

(54) CONNECTING FOR PAPER LAYERED MATERIALS

one

The invention relates to the production of cold-formed paper laminates.

A binder for the preparation of cold-formed paper laminates is known, which contains a phenol-formaldehyde resole resin and a carboxylated copolymer based on diene, acrylic acid and monovinyl aromatic compounds l.

These paper laminates have high water resistance and flexural strength, but do not have good mechanical and electrical properties at high temperatures.

The closest in composition of the already well-known binders for cold-formed paper laminates is a binder comprising an alkyl-containing phenol-formaldehyde resin, an unsaturated drying oil, and a desiccant 2J.

However, on the basis of a known binder, it is not possible to create paper laminates with good mechanical and electrical properties at high temperatures.

The aim of the invention is to provide cold-formed paper laminates having good mechanical and electrical properties at high temperatures and cheaper.

To achieve this goal, it is proposed to bind paper lamination materials based on alkyl-containing phenol-formaldehyde resin, applied drying oil, and desiccant to introduce an oligomer — tetrakis (methylphenylsiloxanhydroxy) titanium (TMFT product) of the formula

sns

Ti (OSi) 30H},

SbH5

at the next content of the binder components, weight. %:

Saturated drying oil8-12

Oligomer TMFT4-10

Dryer 0.5-1.0

Alkylso containing phenol-formaldehyde resin-making Getinax, obtained on the basis of the proposed binder, is distinguished by a high degree of formability under room conditions (temperature 23.i2 C) and the best mechanical and electrical properties at elevated temperatures. In addition, the content of scarce vegetable oils is reduced, which leads to cheaper getinaks. The oligomer is a heat-resistant (up to 500 ° C) substance, transforming at 16 ° C (compression temperature of laminated plastic) into an oily structure of the type CH3 CeHs OHC SbH3 lsio) 3 ,. Up to $ 1), X oTi. / о X (51о) з Со Si) X / СНз CgHs СНз СБН5

970 73O

Phenolic resin (84%) Tung oil (12%)

995 505 TMFT Oligomer (3%)

Samples stamping getinaksa XRS-470 (company Spooulding, Canada) 7

7OO ZOO262O 1O10

 The binder composition is not exactly known, but it should be based on phenol-formaldehyde resin.

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25

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Claims (2)

1.10 Along with butoxyformaldehyde resin in the proposed composition can be used Eioxy: -, isopropyl formaldehyde resins. Alkylphenol resins can be used along with alkylphenol resins. Of non-greasy oils, flaxseed, soybean, cottonseed, etc. can be successfully used. Desiccant No. 63 is lead-manganese naphthenate. Example 1. Impregnating grade B paper is impregnated with a binder based on 81.5% butoxyphenol formaldehyde resin, 8% tung oil, 0.5% desiccant no. 63, and 10% TMFT oligomer. Impregnated paper containing 45% resin is collected in bags and pressed at a temperature of 15016О С, specific pressure of ЗО-1ОО kg / cm at the rate of 10-2О min / mm of the thickness of getinaks. The obtained samples with a thickness of 2 mm were tested, the test results are shown in the table. EXAMPLE 2 Grade A paper (GOST 3441-63) is cured with a binder based on 83% butoxyphenol formaldehyde resin, 12% tung oil, 1.0% desiccant no. 3 and 4% of TMFT oligomer. Pressing of the impregnated paper (the resin content in it is 44.5%) is carried out according to the regime specified in Example 1. Getinax samples of various thicknesses (from 0.25 to 2.5 mm) are subjected to stamping and other tests (see table ). Froze Paper (GOST3441-63 is impregnated with a binder based on 77% butoxyphenol-formaldehyde resin, 12% tung oil, 1, O% siccative no. 63 and 1O% of TMFT oligomer. Paper is impregnated with a binder based on 81.5 % isopropylphenol formaldehyde resin, 8% crude oil, 0.5% desiccant and 10% TMFT oligomer. Drying of the impregnated fabric is carried out at 130-15 ° C for 30-40 minutes. Pressing is carried out according to the mode indicated in example 1. The samples obtained have a satisfactory appearance. Resistance to static bending of samples at 20 ° C is 970 kg / cm at 100 ° C 7 00 kg / cm2; electrical strength perpendicular to the layers at 2 O C 29 kV / mm; at 100 C 26 kV / mm, stampability 7. EXAMPLE 5. For impregnation of paper, a binder based on 80% ethyl dicrol formaldehyde resin is used , 9.5% soybean oil, 10% TMFT oligomer, and 0.5% desiccant. Drying of the impregnated paper was carried out at 125-140 ° C, pressing according to the regime specified in Example 1. The static bend resistance of the getinak is 87O kg / cm at 2O si 600 kg / cm at 100 C; electrical accuracy of 30 kB / mm at 20 ° C and 25 kB / mm at 10 ° C; Stampability 7. The production of stamping getinax will largely replace the costly extrusion resin used at the present time and thus save hundreds of meters of cotton fabrics. Binder for paper layered materials, including alkyl-containing phenol-formaldehyde resin, unsaturated drying oil and desiccant, differs from the fact that, in order to improve the mechanical and electrical properties of cold-formed materials at elevated temperatures and reduce the cost of the material, it additionally contains etrakis - (methylphenylsiloxanhydroxy) tian oligomer of the formula CH3 TiROSD OHJ in the following ratio of binder components, wt. %: Unsaturated drying oil8-12 Desiccant 0.5 -1.0 Oligomer tetrakis - (methylphenylsiloxanhydroxy) titanium4 -10 Alkyl-containing phenol 1U1-aldehyde resin else Information sources taken into account during the examination: 1. US patent number 3627628, class 161 251, 14. 12. 71. 2. The patent of Switzerland No. 385941, class 21c 2/21, 1958 (prototype).