JPS60195118A - Urethane handle - Google Patents

Abstract

PURPOSE:To obtain an urethane handle with small temperature dependency, by molding using a semi-rigid integral skin polyurethane foam prepared from polyether polyol, polymer polyol, crosslinking agent, foaming agent, catalyst, pigment, etc. CONSTITUTION:The objective urethane handle can be obtained by carrying out a RIM molding circumferentially on core 1, using the following components: (A) polyether polyol and/or polymer polyol, (B) crosslinking agent (e.g. diethylene glycol), (C) foaming agent, (D) catalyst (e.g. triethylenediamine), (E) pigment, and (F) as isocyanate component, a mixture of pure MDI and crude MDI (pref. a weight ratio of the former to the latter falling between 9/1 and 4/6) to form semi-rigid integral urethane layer 2. Said pure MDI represents 4,4'-diphenylmethane diisocyanate, etc. whereas said crude MDI polymeric diphenylmethane diisocyanate, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can be used to cover a urethane handle with a low humidity 1Δ sensitivity.

Prior art A conventional urethane handle is made of, for example, a semi-rigid integral skin polyurethane foam (a urethane foam in which a high-density skin layer and a low-density internal foam layer are integrally formed) made of poly:[-chill polyol and pure MDI prepolymer. RI tVI (Re)) C1:
i o n l n j e c t i o n M
o1dino) is made by molding. Another problem is that urethane handles generally feel hard at low temperatures and soft at high temperatures.

Purpose of the Invention This invention 1 was made in order to improve the temperature dependence of the conventional urethane handle, and its purpose is to improve the temperature dependence of the conventional urethane handle, and its purpose is to improve the temperature dependence of the conventional urethane handle, and its purpose is to improve the temperature dependence of the conventional urethane handle. Polyurethane foam A-
To provide a urethane handle J made of rubber, which has excellent temperature dependence, does not become hard at low humidity, and does not become soft at high temperature.

Structure of the Invention The urethane handle of the present invention comprises a polyether polyol and/or a polymer polyol, a chestnut crosslinking agent, two blowing agents, a catalyst, a pigment, and pure MDI as an isocyanate component.
It is formed from a semi-rigid integral skin polyurethane foam A using a mixture of MDI and crude MDI.

EXAMPLES Below, eleven examples of the present invention will be explained with reference to FIGS. 1 and 2.

The urethane handle 8 in this example is polyether polyol C → Noshiex 15Δ-703 (trifunctional group
Molecule lit! -r OOO [Sanyo Kasei] Nigyo Co., Ltd.'') 50 Φ■ part and Efsenol G-510 (=functional group molecule fn5000r Asahi Glass Co., Ltd.'') 5)
18 parts by weight of diethylene glycol as a crosslinking agent, 15 parts by weight of Freon-11 as a blowing agent, 0.7 parts by weight of 1-lyethylenediamine as a catalyst, pigment (
Black) to 6 Kojinbe, Picoa MI) l / Crude MDI as Coronat t”1051 (N00%-29%
Bicore M D1/Clued tvl l) l = 5
0/50 F Japan Polyurethane] Manufactured by Nigyo Co., Ltd.
) and 0.5 parts by weight of a benzo-1-lyazole ultraviolet absorber, RIM molding was performed on the core material 1. Integusil'cretan layer 2 has been formed.

Then, a comparative test was conducted on the dependence of this urethane handle 8 and urethane handle B made of a conventional polyether polyol and pure MDI prepolymer.

In addition, the conventional urethane handle B used in the comparative test was ZANX FA-703 as a polyether polyol.
(=functional group molecule 15000 [manufactured by Sanyo Chemical Industries, Ltd.]) with 50 weight ω parts and 1 non-X FA-909 (
50 parts by weight of trifunctional group, molecular weight 6 ooo r (manufactured by Sanyo Chemical Industries, Ltd.), 9 parts by weight of ethylene glycol as a crosslinking agent, 15 parts of Le A-11 as a blowing agent, and triethylenediamine as a catalyst. 1 part by weight, 6 parts by weight of pigment (black), Coronet 1-1 as pure MDI
0/l0 (N00%-23% F Hiki Polyurethane T Gyo Co., Ltd.) was used for 65 parts, and 0.5 parts of benzo-1 to lyazole-based ultraviolet absorbers were used for each core material. By performing RIM molding, semi-hard integral urethane 11'' and 12 of the core layer 1 of the core layer 1 are formed.

This test was carried out with the urethane handle △, 13 at an ambient temperature of 1, marked 0°C, 20'C, = lO°C, 60°C and 80°
Place the urethane handle Δ, 13 (l!
was held. dj, hardness Ig used for hardness measurement, :l
Is Asuka-CI# Iu total (1 high minute-If Za ceremony?
I! ! I! 7) -ch The hardness measured by this hardness t1 is hereinafter referred to as type C hardness.

This test bundle is plotted horizontally as 1i+11, and the vertical axis is I! I! The degree is shown in Figure 2.

The characteristic graph of 1.1 temperature dependence in Fig. 2 shows the urethane handle of this example At 2M, it is certain that it will not be soft at 1 (it is 81 degrees).

Furthermore, in general, urethane handles have a hardness index of J3.
Teha Tsu'7+'r iI! T! An I decay of 70±5 is most suitable for the feel, and if the hardness is less than 60, it is too soft and the presence of the core material 1 can be discerned, making it unsuitable for use as a urethane pan.

Next, the ratio of picoa M l) I/crude MDI is 5
0/! j O and molded in the same manner as in the previous example! The urethane handle A1 of this invention and the conventional Pure MD
Urethane handle B from I and Crude MD I
A light resistance test was conducted on a urethane handle C made of:

dj, the urethane handle C made of the crude MDI is polyether (tetrafunctional group molecule fJfv 7000
) to 100 parts, 5 parts to ethylene glycol as a crosslinking agent, 11 to 11 parts to Freon-11 as a blowing agent.
Part, O,! ”)
Heavy R part, 6 small parts of pigment, 35 parts by weight of Crew 1~'MDI, and 0 part of benzo~lyazole ultraviolet absorber.
．． By using 5 parts by weight and performing 1<1M molding on the core material 1, a semi-rigid integral urethane layer 2 was formed around the outer periphery of the gap 441.

This light fastness test was carried out using a 1-dometer ('fJ at 83°C).
The urethane handle was twisted C'I 0 times every 50 hours under A degree conditions), and the crack generation time was measured.

1) The table below shows the results of the 11th test.

From the table above, the urethane handle Δ1 is the crack occurrence n-
'1 for more than 1,000 hours, and it can be confirmed that the light resistance is comparable to that of the conventional construction of the handle. .

If the ratio of I/crude MDI becomes 9/1J, it is not preferable because the 9/r properties of the conventional urethane handle of pure MDI, that is, the temperature dependence becomes large. In addition, when the ratio of pure MDl/crude MDI is smaller than /l/6, the properties of crude MDI, such as tensile strength, wear resistance V1, elasticity, etc. This is not desirable because the physical properties become poor.

In addition, although polyether polyol was used in the above embodiment, the effect is the same even if a polymer polyol is used instead of poly T-chill polyΔ-ol.

In addition, Bee 17MDI is /1. /l--It is an abbreviation for diphenylmethane diisocyanate and its carbodiimide modified product, etc. Crude MDI is Polymeric Schiff, 1.
Nirmekun diisocyanate-1 (approximately ladle-) (in addition, these prepolymers also contain ρ.

Effects of the Invention As described in detail, the present invention utilizes polyether polyols and/or polymer polymers, crosslinking agents, blowing agents,
Catalyst, Pigment, and Sardine Ana-1 ~ Pure M as Ingredients
By forming a semi-rigid integral skin polyurethane foam using a mixture of DI and crude MDI, it is possible to create a semi-rigid integral skin polyurethane foam made of a conventional polyether polyol or MDI prepolymer. This is an excellent invention for industrial use because it has better temperature dependence than other urethane handles, does not become hard at low temperatures, and does not become soft at high temperatures.

[Brief Description of the Drawings] Figure 1 (cross-sectional view of the urethane handle), Figure 2 is a graph showing the temperature dependence of the urethane handle. Core material 1. Semi-rigid urethane layer 2゜q,l:' Applicant Yutaka D” Gosei Co., Ltd.
Attorney Patent attorney J4 [1j lei Figure 1 Figure 2 0 20 40 60 80 Ambient temperature (C)

Claims (1)

[Claims] 1. Using pure MDI and Crude M1) 11 blends as components such as polyether polyol and/or polymer polyol, crosslinking agent, blowing agent, catalyst, pigment, and isocyanol. The half-fN you had? ff A 1-note tan handle featuring 12J made of integral skin polyurethane foam. 2, B I horn to 41 1 and Crude M1] 1) 14 ratio 4, 'L ;Q ii! The urethane handle according to claim 1, characterized in that the ratio R' is C9/'-1 to 4/6.